Database Users

Something is killing my battery?!?!

So I am at work, looking at my N1, and I'll let you all tell me if you think there is a problem...Since a full charge last night, my phone has been off the dock for 2h9m ...
In that time, my battery has dropped 14% already. The biggest culprit...the display...with 59%...despite only being on for 15m. I always use it on the middle brightness setting from the power bar. Ive lost basically 1% for every minute the screen has been on. At that rate, my phone wouldn't even last 2 hours turned on.
Am I being paranoid? Do I have some rogue program sucking battery life? Your thoughts?

Everybody says controversial stuff about phones like N1 or iPhone regarding battery life. But I can tell you from experience and some conferences I have been the following tips to improve your N1 battery:
-Leave brightness to minimum. Only at street you will need to have it at medium or maximum so you can see well.
-Use 3G or wifi when available. It will save more battery than if you use edge.
-Use push, also it's better.
-User apps like TaskManager to auto kill some application that remain open.
And last thing, if you have a new N1 the battery life will improve with the use within the next 2 weeks. Also, I'm sure you are playing around more than usual if you just got it.
I hope this help you.

*#*#4636#*#*
Battery History
See what the figure for 'running' is, if it's high, something is stopping the phone sleeping. Should that be the case, chage the top drop down box to 'partial wake usage' and see what is to blame.

blastik said:
Everybody says controversial stuff about phones like N1 or iPhone regarding battery life. But I can tell you from experience and some conferences I have been the following tips to improve your N1 battery:
-Leave brightness to minimum. Only at street you will need to have it at medium or maximum so you can see well.
-Use 3G or wifi when available. It will save more battery than if you use edge.
-Use push, also it's better.
-User apps like TaskManager to auto kill some application that remain open.
And last thing, if you have a new N1 the battery life will improve with the use within the next 2 weeks. Also, I'm sure you are playing around more than usual if you just got it.
I hope this help you.
Click to expand...
Click to collapse
This is the complete opposite of what everyone else will tell you.
Most people say to force 2G (Edge) because it'll save battery over 3G. There are reports that WiFi will use less battery than 3G though, but not as good as 2G. Google even says this on the screen where you force 2G.
Push Email will require a constant polling on the internet. Since Android is a web OS, its probably connected to the internet anyway, but you can disable Auto Sync and Background Sync to save battery (once again, Google says this on that screen).
I agree with #1 and #4 though. If you don't want to do the lowest brightness setting, try the Auto Dim, it seems to dim it a lot more than my old Windows Mobile phones did.

mindfrost82 said:
This is the complete opposite of what everyone else will tell you.
Most people say to force 2G (Edge) because it'll save battery over 3G. There are reports that WiFi will use less battery than 3G though, but not as good as 2G. Google even says this on the screen where you force 2G.
Push Email will require a constant polling on the internet. Since Android is a web OS, its probably connected to the internet anyway, but you can disable Auto Sync and Background Sync to save battery (once again, Google says this on that screen).
I agree with #1 and #4 though. If you don't want to do the lowest brightness setting, try the Auto Dim, it seems to dim it a lot more than my old Windows Mobile phones did.
Click to expand...
Click to collapse
At first I had the same opinion as you have but after I watched this video it changed radically
http://www.youtube.com/watch?v=OUemfrKe65c&feature=player_embedded

mindfrost82 said:
Push Email will require a constant polling on the internet.
Click to expand...
Click to collapse
No it doesn't, that's the beauty of push email. It opens a connection to the server and just sits idle.

Rusty! said:
No it doesn't, that's the beauty of push email. It opens a connection to the server and just sits idle.
Click to expand...
Click to collapse
You are right so ... it saves battery at the end.
@mindfrost82. Check out the video, it will tech you few things because most of people is wrong as I was in the past.

Battery Drain
My phone would drain 15% battery in 1 hour just being idle witht he screen off. I dialed *#*#4636#*#* and changed the option from WCDMA preffered to WCDMA only. When I don't get a 3g signal (not often) I jsut go back to that and set it to GSM only. For one reason or another the WCDMA preffered SUCKS THE BATTERY!
4 hours of the phone being idle and only 5% battery drain! DO IT! IT WORKS!

blastik said:
At first I had the same opinion as you have but after I watched this video it changed radically
http://www.youtube.com/watch?v=OUemfrKe65c&feature=player_embedded
Click to expand...
Click to collapse
WTF? 3g uses LESS POWER than edge/wifi?!
My whole world just got turned upside down
Thanks for posting the video

ap3604 said:
WTF? 3g uses LESS POWER than edge/wifi?!
My whole world just got turned upside down
Thanks for posting the video
Click to expand...
Click to collapse
You need to be careful of this. The point the video made is that if you download something OF SIMILAR SIZE, you will realize battery gains by virtue of the fact that what you are downloading/uploading takes exponentially less time to retrieve. The real question is, if 2 phones are both casually browsing for the same amount of time...without worrying how much information was actually transferred...one on Edge, the other on 3G...is there a difference in battery performance?
What the video said is just common sense. If I am going to send you 20 MB file and one way takes 2 minutes to download it and the other takes 10 minutes to download, then OF COURSE the 2 minute method is going to be more efficient. So you can download on Wifi where it might take x amount of time, compared to 3G where it takes 5x or edge where it takes 10x. Thus, if the file size the person is going to download is known, then of course it makes sense to tell them to wait until they are on wifi. However, many of us casually browse, on the spot, without regard to the type of connection we are on.

RayKinStL said:
You need to be careful of this. The point the video made is that if you download something OF SIMILAR SIZE, you will realize battery gains by virtue of the fact that what you are downloading/uploading takes exponentially less time to retrieve. The real question is, if 2 phones are both casually browsing for the same amount of time...without worrying how much information was actually transferred...one on Edge, the other on 3G...is there a difference in battery performance?
What the video said is just common sense. If I am going to send you 20 MB file and one way takes 2 minutes to download it and the other takes 10 minutes to download, then OF COURSE the 2 minute method is going to be more efficient. So you can download on Wifi where it might take x amount of time, compared to 3G where it takes 5x or edge where it takes 10x. Thus, if the file size the person is going to download is known, then of course it makes sense to tell them to wait until they are on wifi. However, many of us casually browse, on the spot, without regard to the type of connection we are on.
Click to expand...
Click to collapse
Yeah, what you just said is right. But still you are saving battery up! Plus I wouldn't use edge at all in my N1. What's the point of having almost everything disabled so I can receive calls?
I remind you that while edge is sending/receiving data you cannot get any calls

blastik said:
At first I had the same opinion as you have but after I watched this video it changed radically
http://www.youtube.com/watch?v=OUemfrKe65c&feature=player_embedded
Click to expand...
Click to collapse
This is an excellent video, I highly recommend watching it if you are even remotely interested in the inner workings of our phones.

blastik said:
I remind you that while edge is sending/receiving data you cannot get any calls
Click to expand...
Click to collapse
Thanks, I didn't know this, for the info this thread is full of great stuff...

1) middle brightness is very bright. I'm sure you can live with 25%. Display brightness will always drain battery like mad.
2) 3G power use is usually decent. The N1 has terrible RF so it might be fighting 2G/3G. That will cost you a lot of power. If you're getting full 4 bars 3G everywhere you go even underground, you might be ok, but in low reception areas, it's gonna drain your battery struggling to boost power. Bigger issue during a call too.I notice this on my Milestone. The N1 completely fails at 3G while my Milestone fights for it. As a result the Milestone gets quite hot.
3) There are sometimes apps that run in the background. Some people insist task killers aren't necessary, but lemme give you an example. Stupid Speedtest program failed to acquire my location. After a test, you can't really exit, so you just hit home. Droidforums fanatics will always repost that link to that one thread where they talk about memory and its ok to not have to kill an app. Think again. The GPS turns on because of Speedtest and it keeps trying to acquire your location. Gotta kill it with a task manager or that thing will kill you. Or a webpage. I've heard of people going to some site that keeps refreshing. Oh good luck to your battery. Make sure you close these things. Use a task manager. Sometimes Facebook or Twitter might be the culprit even if your refresh rates are awfully long. I do not understand this phone sometimes. At times I feel that multitasking/memory management on Android gets you into more trouble than if you just flat out restricted it like in the iPhone. I'm not saying the iPhone's restrictions are the way to go, but Apple knew what it was doing. There's a reason Android phones gobble power and pull data like mad even when you aren't aware. Random apps sometimes start. Facebook widget refreshes even though the app itself is set not to auto notify and to update on its own. So with so many things running loose, its quite easy to see why your battery can go down so fast.

RayKinStL said:
You need to be careful of this. The point the video made is that if you download something OF SIMILAR SIZE, you will realize battery gains by virtue of the fact that what you are downloading/uploading takes exponentially less time to retrieve. The real question is, if 2 phones are both casually browsing for the same amount of time...without worrying how much information was actually transferred...one on Edge, the other on 3G...is there a difference in battery performance?
What the video said is just common sense. If I am going to send you 20 MB file and one way takes 2 minutes to download it and the other takes 10 minutes to download, then OF COURSE the 2 minute method is going to be more efficient. So you can download on Wifi where it might take x amount of time, compared to 3G where it takes 5x or edge where it takes 10x. Thus, if the file size the person is going to download is known, then of course it makes sense to tell them to wait until they are on wifi. However, many of us casually browse, on the spot, without regard to the type of connection we are on.
Click to expand...
Click to collapse
That's exactly the idea I got from that video too, which makes sense.

dmo580 said:
1) middle brightness is very bright. I'm sure you can live with 25%. Display brightness will always drain battery like mad.
2) 3G power use is usually decent. The N1 has terrible RF so it might be fighting 2G/3G. That will cost you a lot of power. If you're getting full 4 bars 3G everywhere you go even underground, you might be ok, but in low reception areas, it's gonna drain your battery struggling to boost power. Bigger issue during a call too.I notice this on my Milestone. The N1 completely fails at 3G while my Milestone fights for it. As a result the Milestone gets quite hot.
3) There are sometimes apps that run in the background. Some people insist task killers aren't necessary, but lemme give you an example. Stupid Speedtest program failed to acquire my location. After a test, you can't really exit, so you just hit home. Droidforums fanatics will always repost that link to that one thread where they talk about memory and its ok to not have to kill an app. Think again. The GPS turns on because of Speedtest and it keeps trying to acquire your location. Gotta kill it with a task manager or that thing will kill you. Or a webpage. I've heard of people going to some site that keeps refreshing. Oh good luck to your battery. Make sure you close these things. Use a task manager. Sometimes Facebook or Twitter might be the culprit even if your refresh rates are awfully long. I do not understand this phone sometimes. At times I feel that multitasking/memory management on Android gets you into more trouble than if you just flat out restricted it like in the iPhone. I'm not saying the iPhone's restrictions are the way to go, but Apple knew what it was doing. There's a reason Android phones gobble power and pull data like mad even when you aren't aware. Random apps sometimes start. Facebook widget refreshes even though the app itself is set not to auto notify and to update on its own. So with so many things running loose, its quite easy to see why your battery can go down so fast.
Click to expand...
Click to collapse
I'll second this, I never used to use a task killer as I figured it was just extra drain on the battery but after running across some rogue programs that kept running after being closed and draining the heck out of my battery I decided to install taskkiller and set it up to autokill apps when the screen goes off.
It's really easy to setup just install it from the market then use it to kill everything then flip through your homescreens make sure everything is up and running and go back into task killer and add everything there to the ignore list and turn on "autokill when screen off" now you don't ever have to worry about rogue apps killing your battery again and everything else will function normally.

blastik said:
Yeah, what you just said is right. But still you are saving battery up! Plus I wouldn't use edge at all in my N1. What's the point of having almost everything disabled so I can receive calls?
I remind you that while edge is sending/receiving data you cannot get any calls
Click to expand...
Click to collapse
yes you can, the phone will stop whatever data it's processing and take the call.

seanhassars said:
yes you can, the phone will stop whatever data it's processing and take the call.
Click to expand...
Click to collapse
I'm sure 100% that while phone is receiving data over edge you wont get calls. I know because I had push enabled and afterwards I was getting SMS from my carrier that I have missed calls. It might say "ey sb is trying to call you" and then stop data transfer but for sure your will miss first call if someone is trying to reach you several times.
Check it out yourself.

blastik said:
Everybody says controversial stuff about phones like N1 or iPhone regarding battery life. But I can tell you from experience and some conferences I have been the following tips to improve your N1 battery:
-Leave brightness to minimum. Only at street you will need to have it at medium or maximum so you can see well.
-Use 3G or wifi when available. It will save more battery than if you use edge.
-Use push, also it's better.
-User apps like TaskManager to auto kill some application that remain open.
And last thing, if you have a new N1 the battery life will improve with the use within the next 2 weeks. Also, I'm sure you are playing around more than usual if you just got it.
I hope this help you.
Click to expand...
Click to collapse
there are a lot of people who say do not use a task killer, including google devs etc.
i used advanced task killer for the longest time, being used to needing one as a WM user before getting my n1. after reading various posts on the issue, i tested without and my battery life increased.
i use juice defender now as well to turn off the apn and wifi, based on speeds/location/etc
have it set to prefer 2g (dont get 3g at home)
screebl also setup to turn screen off when not in certain position in hand
last one is setcpu (need root for this though) underclocking the cpu (including advanced setting and profiles i have set)
lowest setting for brightness
also keep gps off unless needed
i hit about 24hr from unplug til 10% w/ heavy useage, wifi on all the time (although juicedefender handles when its on/off)
just now went to kmobs UV kernel and testing that to increase my times
i've done a 24hr test from 100%>10% based on each app i've mentioned

I think while we are on topic of battery life.. for those of you who are rooted. Here is another link that I would recommend. I used these on my HTC Dream and works great on the Nexus One. Increase your battery life 10 fold.
Your Tube: "Get Better Battery Life" by droiddog
sorry not allowed to link yet

Possible cause and solution to X10 Battery? -"No Sleep Bug"

Hey guys,
Just updated to the x10 after my samsung galaxy died on me, so far i am rather happy - except for the lack of root, but that will come.
I have noticed many complaints on the forum about battery life, and have experienced the same thing myself. From my experience, i think this looks like the same issue that was faced on a leak of 1.6 for the galaxy - it was referred to as the "No Sleep Bug".
TBH, the name says it all - for some reason, in many builds of android 1.6, phones were not sleeping correctly. There are many theories as to why, from cpu not being allowed to sleep, to permanent communication with google servers.
Despite all these different theories, one thing seemed to fix the problem - turning off all location services. Some people argue that a different carrier build, turning off just 'share with google' under location, turning off just AGPS etc. would fix it, but from my experience, the only real way to fix the issue was to turn off all GPS usage unless you need it. The once you have used it, reboot your phone.
This fix obviously sucks, and a new fix has recently been released by a veritable android-demigod around the Galaxy.
HERE IS A THREAD ABOUT NO SLEEP ON i7500 GALAXY;
(ok, some stupid rule says i can't post links - can a mod help me out?)
HERE IS THE FIX FOR THAT PARTICULAR BUG;
(ok, some stupid rule says i can't post links - can a mod help me out?)
LINKS ARE IN POST #5 - THANKS TO ONDOTEAM (would still be nice to get them in this original post though)
Now, from my experience, no sleep behave exactly the same way on the x10 as it does on the Galaxy;
1) I turn of all location services, and my battery life at least doubles.
2) After said turning off of services, 'spare parts' no longer says 100% running time under battery usage - in fact it can be as low as 10%.
These two factors are identical to my experience with Galaxy. SO; is there any way drakaz's fix can be applied to our X10's? It seems to me that the files he mods are standard Android system files, not sony/samsung specific.
Now i am no developer, so i dont know it this is possible - the first question that comes to mind for me is "do we need root access, or can this be done through developer tools using the android SDK?"
Can anyone help shed anymore light on this?

Seems to work for me. I disabled all location services. Spare Parts went down from 100% to 7.6%.
I'll just have to enable GPS when I need to use it..

Awesome! Glad to hear it has helped.
Let's keep testing this guys - if it does show up to be a big cause, then perhaps the devs around this place can help is figure out a patch for Drakas' mod to make it work with our x10's!

n3man said:
Awesome! Glad to hear it has helped.
Let's keep testing this guys - if it does show up to be a big cause, then perhaps the devs around this place can help is figure out a patch for Drakas' mod to make it work with our x10's!
Click to expand...
Click to collapse
Hello send me a PM with links, I will try to post it

http://androidforums.com/samsung-i7500/61168-no-sleep-has-nothing-do-anything.html
http://androidforums.com/samsung-i7500/78471-no-sleep-bug-fixed-drakaz.html
Links from n3man

No sleep is easy to fix, took me a while to figure it...
Turn your screen brightness from manual to auto, spare parts will now start showing proper running stats, no more 100% running.
The screen is a little dark in auto but it will cure the 100% running.
GPS and location services etc make no difference to my X10i, I am running the 1.6 version unbranded UK handset, the only thing to stop mine running 100% is to put the screen on Auto.

ronnyuk said:
No sleep is easy to fix, took me a while to figure it...
Turn your screen brightness from manual to auto, spare parts will now start showing proper running stats, no more 100% running.
The screen is a little dark in auto but it will cure the 100% running.
GPS and location services etc make no difference to my X10i, I am running the 1.6 version unbranded UK handset, the only thing to stop mine running 100% is to put the screen on Auto.
Click to expand...
Click to collapse
LOL... this is already going the way of the Galaxy thread!
My phone came out of the box with auto-brightness and i never changed that option, yet i still had no sleep.
Drakaz has done some fairly deep digging and is next to certain that it is an artefact of the geolocation bug discussed in the thread in which the problem was fixed.

I can't see "Spare Parts" in About Phone -> Battery Info

tuxStyle said:
I can't see "Spare Parts" in About Phone -> Battery Info
Click to expand...
Click to collapse
Me neither.. I was wondering about that myself!..
Although I'd half assumed that they were referring to the total "up-time" figure which you can see at the bottom of the "about phone"; "Status" screen.. But perhaps not.?

Spare Parts is a standalone Program ...
(i don't know for sure if it is in the market or downloadable as .apk from somewhere here in the forum ...)
Bax

im_iceman said:
Me neither.. I was wondering about that myself!..
Although I'd half assumed that they were referring to the total "up-time" figure which you can see at the bottom of the "about phone"; "Status" screen.. But perhaps not.?
Click to expand...
Click to collapse
You can download it here

Spare parts is indeed available from the market - it is a much more powerful tool for indicating battery usage than the regular android methods. The galaxy stared on 1.5 which had NO indicator of battery usage statistics at all, so we all learned about spare parts very fast.
Perhaps that is why no x10 users have realised about the potential no sleep bug; because so far only the android usage indicators have been used?...
Anyway, hopefully this can help us all understand the way our phones are working better together

n3man said:
Spare parts is indeed available from the market - it is a much more powerful tool for indicating battery usage than the regular android methods. The galaxy stared on 1.5 which had NO indicator of battery usage statistics at all, so we all learned about spare parts very fast.
Perhaps that is why no x10 users have realised about the potential no sleep bug; because so far only the android usage indicators have been used?...
Anyway, hopefully this can help us all understand the way our phones are working better together
Click to expand...
Click to collapse
14% it's mine value for running time, not 100%. By the way thats 30 minutes of 210 in total :S

I'm also experiencing "No sleep bug" after i used GPS. I use Battery Graph to plot my power consumption and after I use GPS, I can clearly see that power consumption is high even if i turn the phone in plane mode.
In addition SE widget, used to turn on/off GPS, seems to not work very well for me. So, to fix the bug, i manually disable GPS in parameter menu and restart my phone. After that power consumption is hardly null (20% in 8h with MP3 on almost all the time).

mimok said:
I'm also experiencing "No sleep bug" after i used GPS. I use Battery Graph to plot my power consumption and after I use GPS, I can clearly see that power consumption is high even if i turn the phone in plane mode.
In addition SE widget, used to turn on/off GPS, seems to not work very well for me. So, to fix the bug, i manually disable GPS in parameter menu and restart my phone. After that power consumption is hardly null (20% in 8h with MP3 on almost all the time).
Click to expand...
Click to collapse
Do you have 3G always on?

My phone has no trouble sleeping.
Gps hasn't really been an issue but I keep it off when not needed.
Here's my solid settings:
1) No auto sync
2) No moxier
3) Gps off
4) Restart after using wireless
As long as it's like this my phone lasts 2 days easily

ondoteam said:
Do you have 3G always on?
Click to expand...
Click to collapse
Yes, but I made a lot of test with and without 3G enabled and 3G seems not to be a problem for me. I think my problem comes from GPS.

ondoteam said:
Do you have 3G always on?
Click to expand...
Click to collapse
3G always on.

n3man said:
LOL... this is already going the way of the Galaxy thread!
My phone came out of the box with auto-brightness and i never changed that option, yet i still had no sleep.
Drakaz has done some fairly deep digging and is next to certain that it is an artefact of the geolocation bug discussed in the thread in which the problem was fixed.
Click to expand...
Click to collapse
I have been playing with mine for a month to work out what caused mine to not go into sleep, I keep GPS wifi etc on 24/7 but in spare parts I was running 100%, after numerous reinstalls and removing everything i chanced on turning on auto screen brightness, now when i unplug my x10 the running sits at the correct level.
No Geolocation bug here

I have this problem with 100% on and off. Sometimes when I check its under control (~10%), other times its at 100%. I have GPS off, no WiFi, auto brightness... don't know why it sometimes just gets stuck at 100% :/

I don't get how people have battery drain.

Like I honestly don't understand it. They are obviously doing something wrong. I am running NAND with the SD card for applications (Stock 16GB) with gauner1986's HD-FI 0.3 with 2.15.50.14 and I have only 2-5ma battery drain on standby. But here's what I noticed:
Certain applications from Market increases battery drainage. If you install an app, begin to experience high battery drain, uninstall it.
It's a 3G phone for godsakes. Why disable the speed of it by going 2G?
Disable WiFi/Bluetooth/GPS when not needed.
Don't disable AutoSync or Background Sync. I've noticed no increase with both of them except when it pushes email, updates
Keep the brightness UP to 100 percent. I saw no difference upon lowering it.
Don't disable APN either. This isn't your dumbphone, it's meant to have internet. Internet won't drain your battery life if it isn't active.
SetCPU is pointless. I don't even touch it as the risk to damage your phone using it is great. There has been no solid evidence this helps your battery life other then to SLOW down your phone.
Don't use a TaskKiller - Common sense, it eats battery. Android is programmed to kill apps.
On standby, it can last for freaking days even under light/medium usage. Constant heavy usage will make you last at-least a day.
Seriously. If you get drain, you have the wrong radio or application. I even tried uninstalling stock applications like Calender and removing widgets and they had no effect on my system. If you have to disable MAIN smartphone features, you might as well go back to:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

I agree with most of what you say here but not this
Keep the brightness UP to 100 percent. I saw no difference upon lowering it.
Click to expand...
Click to collapse
Personally i think your better off keeping the brightness as low as possible as i did experience battery drain when i had it up to 100%.

I have a taskkiller and I don't notice any difference at all. Having the brightness to 100 does drain your battery that's just common sense.

have no probs with batt drain, i dont use appkillers, brightness on about 45%, play music most of the day, internet on all day with updates, txt and call daily, still on 75% now, not a problem

FirefighterDown said:
[*]Certain applications from Market increases battery drainage. If you install an app, begin to experience high battery drain, uninstall it.
Click to expand...
Click to collapse
True.
[*]It's a 3G phone for godsakes. Why disable the speed of it by going 2G?
Click to expand...
Click to collapse
Because it really is a battery consumer. Actually, surfing on 3G is more power consuming than on WiFi, and Edge is fast enough for a fair amount of uses. Having a 2G/3G toggle widget is probably best, indeed no need to dumb down your phone too much.
[*]Disable WiFi/Bluetooth/GPS when not needed.
Click to expand...
Click to collapse
WiFi & BT are obviously true, GPS is bullocks. As long as there's no GPS app running (i.e. there's no GPS icon in the status bar), your GPS is not active and is drawing zero current. It's just a setting.
[*]Don't disable AutoSync or Background Sync. I've noticed no increase with both of them except when it pushes email, updates
Click to expand...
Click to collapse
For some people, with certain apps behaving in a certain way (for example business people getting emails every minute), this can really be a serious battery hug. Again no need to dumb down your phone too much, but it if you really need to squeeze out those extra hours of juice this is a valid option.
[*]Keep the brightness UP to 100 percent. I saw no difference upon lowering it.
Click to expand...
Click to collapse
That's plain rubbish. More brightness = more emitted light = more emitted energy. Read a physics book someday, this really makes no sense. Display is one of the biggest battery hogs, especially when actively using your phone. Leaving it on a low brightness level sure helps heaps.
[*]Don't disable APN either. This isn't your dumbphone, it's meant to have internet. Internet won't drain your battery life if it isn't active.
Click to expand...
Click to collapse
First part is true, enjoy the features your phone has. It does drain your battery though, even when inactive. There's no such thing as a free meal. Disabling mobile data won't double your battery life, but is a very valid option when you really need your phone to last just that little bit longer.
[*]SetCPU is pointless. I don't even touch it as the risk to damage your phone using it is great. There has been no solid evidence this helps your battery life other then to SLOW down your phone.
Click to expand...
Click to collapse
Bullocks again. First of all, underclocking cannot damage your phone in any way. Obviously no scientist has done research (actually, someone probably has but I don't feel like googling any right now) to provide solid evidence on the matter of cpu clocking affecting battery life, but any tech-guy with some experience will disagree with you. No need to clock down your CPU to 245Mhz obviously, but a 900Mhz clock speed will still more than suffice for most users. Again this won't significantly boost battery performance, but all the small bits help.
[*]Don't use a TaskKiller - Common sense, it eats battery. Android is programmed to kill apps.
Click to expand...
Click to collapse
Probably the most valuable information in this thread - spot on!
Constant heavy usage will make you last at-least a day.
Click to expand...
Click to collapse
Define heavy usage. How about playing Angry Birds at 100% brightness, while listening to Pandora with your Bluetooth headset/headphones, through a 3G connection obviously. Not a very far-fetched setup eh!
I'll buy you a cookie if you last more than, say, 6 hours. You probably won't last 4 hours either but I really don't feel like buying you a cookie.

FirefighterDown said:
Constant heavy usage (without playing games or watching movies) will make you last at-least a day.
[/IMG]
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fixed
ten char

FirefighterDown said:
[*]Keep the brightness UP to 100 percent. I saw no difference upon lowering it]
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As other posters have said that is nonsense mate. You can easily see with current widget that the consumption is higher with higher brightness.

Bluetooth battery drain is the only issue
Coming from Windows 6.5 -as we all do- we all discuss the battery drainage.
All reasons for battery drainage given in this thread are true (bright screen sucks battery, 3G does etc etc.).
BUT WHY DOES THIS HD2 on ANDROID SUCK MORE BATTERY THAN THE SAME HD2 ON WINMO?
The bluetooth drivers obviously are not the right ones. On Winmo there was no significantly higher battery drainage with bluetooth on than with bluetooth off.
In all Android Roms that I have tried (and I tried them all), bluetooth empties the battery with about 60mA.
Who knows a rom that does not have this bluetooth problem?

jonny68 said:
I agree with most of what you say here but not this
Personally i think your better off keeping the brightness as low as possible as i did experience battery drain when i had it up to 100%.
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I work outside in direct sunlight, where low settings makes it not viewable. I have it to max and even at home at 40 percent, I see no changes. Probably because of my usage pattern.
Sent from my HTC HD2 using XDA App

hello00 said:
I have a taskkiller and I don't notice any difference at all. Having the brightness to 100 does drain your battery that's just common sense.
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Taskkillers have been proven to drain your battery. Google themselves have said it and admitted it in complex details. There's a thread on it that Ill pull up later at home. Like I said I see no differences in my battery report.
Sent from my HTC HD2 using XDA App

StephanV said:
You probably won't last 4 hours either but I really don't feel like buying you a cookie.
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Sorry for this post.... but this made me laugh hard.....

StephanV said:
Probably the most valuable information in this thread - spot on!
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So why when I run a task killer I get over a dozen apps running in list and when I close them my free RAM goes up, surley if they are using ram they are using energy?
Also surely the energy that these apps are using is MORE then the energy of the task killer itself?
There is ****loads of apps that just seem to run themselves in background and have no need to, I set my killer to kill every 30 mins or whenever screen is off aswell as manually when I choose to.
Can you provide any evidence that the task killer uses more energy then all the apps running in background combined as I seem to get much better battery with it then without it.

TheATHEiST said:
So why when I run a task killer I get over a dozen apps running in list and when I close them my free RAM goes up, surley if they are using ram they are using energy?
Also surely the energy that these apps are using is MORE then the energy of the task killer itself?
There is ****loads of apps that just seem to run themselves in background and have no need to, I set my killer to kill every 30 mins or whenever screen is off aswell as manually when I choose to.
Can you provide any evidence that the task killer uses more energy then all the apps running in background combined as I seem to get much better battery with it then without it.
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No, just being in RAM memory does not (or maybe very little) use energy. When idle, they're just stored there. A lot of apps simply restart soon after you kill them, consuming a lot more power than just leaving them be, and on top of that you may experience bad app behaviour.
Well, if those apps do stuff they shouldn't be doing, they're badly developed and should be removed or updated, simple as that. Chances are though that those apps really need to be running (and their battery consumption doesn't necessarily have to be high), in which case killing them is even worse.
A lot of well known devs have very clearly pointed this out multiple times (Cyanogen for example is one of them), even Google twittered about it. Do some research, there's plenty of info on it.

It was good to know that info, i never knew that app killers could do more damage and use more power than none at all.

TheATHEiST said:
So why when I run a task killer I get over a dozen apps running in list and when I close them my free RAM goes up, surley if they are using ram they are using energy?
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No. Android kills applications to free up RAM usage when i needs them.
Also surely the energy that these apps are using is MORE then the energy of the task killer itself?
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Also incorrect, most applications are killed upon exit/back key hit. Or put into a suspended mode that eats no battery (Android Browser, Facebook etc)
There is ****loads of apps that just seem to run themselves in background and have no need to, I set my killer to kill every 30 mins or whenever screen is off aswell as manually when I choose to.
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If only that was true. Killing applications will restart them which uses RAM to restart them which can also slow down your system. Applications don't run unless they are continuously fetching/streaming data or providing a service.
Can you provide any evidence that the task killer uses more energy then all the apps running in background combined as I seem to get much better battery with it then without it.
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Ha, I don't believe you.
tl;dr version at the bottom.
Originally Posted by Google
By default, every application runs in its own Linux process. Android starts the process when any of the application's code needs to be executed, and shuts down the process when it's no longer needed and system resources are required by other applications. A content provider is active only while it's responding to a request from a ContentResolver. And a broadcast receiver is active only while it's responding to a broadcast message. So there's no need to explicitly shut down these components.
Activities, on the other hand, provide the user interface. They're in a long-running conversation with the user and may remain active, even when idle, as long as the conversation continues. Similarly, services may also remain running for a long time. So Android has methods to shut down activities and services in an orderly way:
- An activity can be shut down by calling its finish() method. One activity can shut down another activity (one it started with startActivityForResult()) by calling finishActivity().
- A service can be stopped by calling its stopSelf() method, or by calling Context.stopService().
- Components might also be shut down by the system when they are no longer being used or when Android must reclaim memory for more active components.
If the user leaves a task for a long time, the system clears the task of all activities except the root activity. When the user returns to the task again, it's as the user left it, except that only the initial activity is present. The idea is that, after a time, users will likely have abandoned what they were doing before and are returning to the task to begin something new.
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Originally Posted by Google
Activity lifecycle
An activity has essentially three states:
- It is active or running when it is in the foreground of the screen (at the top of the activity stack for the current task). This is the activity that is the focus for the user's actions.
- It is paused if it has lost focus but is still visible to the user. That is, another activity lies on top of it and that activity either is transparent or doesn't cover the full screen, so some of the paused activity can show through. A paused activity is completely alive (it maintains all state and member information and remains attached to the window manager), but can be killed by the system in extreme low memory situations.
- It is stopped if it is completely obscured by another activity. It still retains all state and member information. However, it is no longer visible to the user so its window is hidden and it will often be killed by the system when memory is needed elsewhere.
- If an activity is paused or stopped, the system can drop it from memory either by asking it to finish (calling its finish() method), or simply killing its process. When it is displayed again to the user, it must be completely restarted and restored to its previous state.
- The foreground lifetime of an activity happens between a call to onResume() until a corresponding call to onPause(). During this time, the activity is in front of all other activities on screen and is interacting with the user. An activity can frequently transition between the resumed and paused states - for example, onPause() is called when the device goes to sleep or when a new activity is started, onResume() is called when an activity result or a new intent is delivered. Therefore, the code in these two methods should be fairly lightweight.
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The following diagram illustrates these loops and the paths an activity may take between states. The colored ovals are major states the activity can be in. The square rectangles represent the callback methods you can implement to perform operations when the activity transitions between states.
tl;dr version
- Android is hard coded to automatically kill a task when more memory is needed.
- Android is hard coded to automatically kill a task when it's done doing what it needs to do.
- Android is hard coded to automatically kill a task when you haven't returned to it in a long time.
- Most services (while possibly running in the background) use very little memory when not actively doing something.
- A content provider is only doing something when there is a notification for it to give. Otherwise it uses very little memory.
- Killing a process when it isn't ready only causes it to have to reload itself and start from scratch when it's needed again.
- Because a task is likely running in the background for a reason, killing it will only cause it to re-spawn as soon as the activity that was using it looks for it again. And it will just have to start over again.
- Killing certain processes can have undesirable side effects. Not receiving text messages, alarms not going off, and force closes just to name a few.
- The only true way to prevent something from running at all on your phone would be to uninstall the .apk.
- Most applications will exit themselves if you get out of it by hitting "back" until it closes rather than hitting the "home" button. But even with hitting home, Android will eventually kill it once it's been in the background for a while.

StephanV said:
For some people, with certain apps behaving in a certain way (for example business people getting emails every minute), this can really be a serious battery hug. Again no need to dumb down your phone too much, but it if you really need to squeeze out those extra hours of juice this is a valid option.
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Obviously you don't have push email setup. Nobody buys the HD2 for that, they buy a Blackberry. Even syncing every hour isn't going to harm your battery other then a few moments versus turning it off altogether. No noticeable differences.
That's plain rubbish. More brightness = more emitted light = more emitted energy. Read a physics book someday, this really makes no sense. Display is one of the biggest battery hogs, especially when actively using your phone. Leaving it on a low brightness level sure helps heaps.
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Like I said above, has no affects on me. On a laptop, sure. Because those are 15 inch screens, not on a 4.3.
Bullocks again. First of all, underclocking cannot damage your phone in any way. Obviously no scientist has done research (actually, someone probably has but I don't feel like googling any right now) to provide solid evidence on the matter of cpu clocking affecting battery life, but any tech-guy with some experience will disagree with you. No need to clock down your CPU to 245Mhz obviously, but a 900Mhz clock speed will still more than suffice for most users. Again this won't significantly boost battery performance, but all the small bits help.
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Are you serious? Overclocking and under-clocking has already been proven to harm Intel and AMD processors on main computers in long term situations. Phones run processors just like your laptop/desktop PC does. There's been nothing to prove it helps save battery. I have never used SetCpu and think it's stupid and my phone still outlasts a buddy who runs SetCPU to underclock the CPU. Speed doesn't affect battery or you'd understand that slower CPU would take longer time to run applications, further reducing the battery.
Define heavy usage. How about playing Angry Birds at 100% brightness, while listening to Pandora with your Bluetooth headset/headphones, through a 3G connection obviously. Not a very far-fetched setup eh!is so
I'll buy you a cookie if you last more than, say, 6 hours. You probably won't last 4 hours either but I really don't feel like buying you a cookie.
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Lets use some basic mathematical skills here. Indeed I just tested this for an hour straight and the drain was 150-200ma constantly. The HD2 battery is something like 1200, 1300ma whatever in total. Lets say its 1200 (too lazy to check) that divided by 200ma drain equals six. Six hours so your logic goes out the door.
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FirefighterDown said:
Obviously you don't have push email setup. Nobody buys the HD2 for that, they buy a Blackberry. Even syncing every hour isn't going to harm your battery other then a few moments versus turning it off altogether. No noticeable differences.
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I'm not sure I'm with you here. I do have push email enabled, and it's one of the things I like about Android. What does Blackberry have to do with this? Missing your point.
Well, in your case, it may not be a noticeable difference. It does for people who get a lot of emails. Exactly like I said in my previous posts. What is your point?
Like I said above, has no affects on me. On a laptop, sure. Because those are 15 inch screens, not on a 4.3.
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Well, I'm 100% sure it affects you too. You can't just create energy out of nothing. Upping the intensity from lowest to highest easily adds in an extra 80mA, and that's just a rough and probably too low estimate.
Have you ever compared you HD2's battery with a laptop battery? Not quite in the same league of size now is it. Moar size = moar powers (well, kind of). Dumb laptop comparison, sorry to put it like this.
You can go ahead and try to reinvent battery usage all you want, but a 4,3" screen is and always will be one of the major battery hogs on a phone like this.
Are you serious? Overclocking and under-clocking has already been proven to harm Intel and AMD processors on main computers in long term situations. Phones run processors just like your laptop/desktop PC does. There's been nothing to prove it helps save battery. I have never used SetCpu and think it's stupid and my phone still outlasts a buddy who runs SetCPU to underclock the CPU. Speed doesn't affect battery or you'd understand that slower CPU would take longer time to run applications, further reducing the battery.
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Are you? I haven't even used the word 'overclocking' in my entire post, of course that's bad for your hardware. Underclocking isn't gonna do **** though. I'll buy you another cookie if you find a valid source backing that statement up. But let me give you a hint: ain't gonna happen José. Just sayin'. (Disclaimer: I'm talking about realistic/plausible underclocking situations here, applicable to comparable hardware)
Uhm actually there has. Moar CPU = moar heat = moar power loss = moar battery loss. Again, conservation of energy, which could be found in the book I advised you earlier (well actually a thermodynamics book would be more appropriate).
Sounds like some very valid empirical proof you got right there. I'm sorry, but I could care less about your 1 comparison with that unknown phone of your unknown buddy, whom I have no clue about if he can even properly configure SetCPU or has a properly configured battery.
Lets use some basic mathematical skills here. Indeed I just tested this for an hour straight and the drain was 150-200ma constantly. The HD2 battery is something like 1200, 1300ma whatever in total. Lets say its 1200 (too lazy to check) that divided by 200ma drain equals six. Six hours so your logic goes out the door.
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150-200mA while playing Angry Birds @ 100% Brightness, while listening internet radio through 3G and BT headphones? Sorry, that's just physically not possible, hardware-wise. Not ever ever ever ever gonna happen, so you are either lying your ass off or have no clue how to check your current usage properly.
I think I'm sounding like a major douchebag here, but I don't really get it how you feel like you know all about this stuff when very clearly your technical knowledge on this matter is really limited. I'm very happy for you that you're happy with your battery life, but don't try and preach this like t3h l33t battery solution, because put simply: it's not.

[*]Keep the brightness UP to 100 percent. I saw no difference upon lowering it.
actually this is so funny dude ..
more light NEEDS more power .. this is so simple.. like 1+1=2

[Solved]Samsung Galaxy S5 battery drain so instantly!

Battery Saving Tips
1. Keeping mobile data (i.e., 4G or 3G) or wifi on all of the time uses battery. Ask yourself if you really need to be notified in real time about every new email, Facebook post, or tweet. If it isn't that important, then keep mobile data and wifi off until you really need it. Although most devices make it easy to toggle wifi off and on, it's a little more inconvenient to toggle mobile data with the stock controls. I like Power Toggles, which is very customizable and easy to use; another popular choice is Widgetsoid.
2. The biggest power drain is usually from the screen. The longer it's on and the brighter it is, the faster your battery drains. Adjust your screen timeout so that it turns off after 30-60 seconds of idle. Turn the brightness down to 50% or less, which is usually more than enough for indoor lighting. Automatic brightness may or may not help save battery--some think that constant sensing and screen adjustment may actually contribute to battery use.
3. Many apps (e.g., Facebook) by default will try to refresh their data on the web at certain intervals. In order to do so, they have to partially wake the device up from sleep, then try to access the web, and then refresh data, all of which uses battery. If you don't need realtime updates, you can typically change to manual refresh in the app's Settings, which prevents the app from waking up the device. For Facebook, all you need to do when you open the app is just swipe down, and your newsfeed will manually refresh to what's current.
4. Google Currents is notorious for being a memory and battery hog. Many people have reported that battery life improved significantly after changing its refresh setting to manual and/or disabling Google Currents completely. (Update 7/2014: Google Currents has since been replaced by Google Play Newsstand, which manages memory much more efficiently, without the same battery drain.)
5. Along the same lines, consider turning off the device's Background Sync. You can find the switch to turn it on or off under Settings/Accounts/Google, but it's easier to use the stock Power Control toggle or the better Power Toggles or Widgetsoid apps. Turning off Background Sync means the device is spending less time and energy syncing your Google account. If Background Sync is off, you can always manually refresh any of the Google apps within their respective menus.
6. Some apps partially wake a device up from sleep (called a "wake lock") numerous times a day to do things like trying to check the web for data updates as well as reporting location data. Install an app to detect wake locks like Wake Lock Detector. Let it run for the better part of a day, then open it and find out what apps are responsible for the most wake locks. (Update 7/2014: KitKat no longer allows apps like this to report wakelocks unless your rooted.)
7. #6 is how I discovered that Google Maps was burning up a fair amount of battery due to its Location Reporting (previously for Latitude, now used for Google+). If Location Reporting is turned on, then Maps causes very frequent wake locks to check location and report it. I don't think Latitude was that popular--I certainly didn't use it, because I don't really want other people to know exactly where I am, so I turn off Location Reporting by opening Maps, tapping Settings/Google Location Settings, and turning off Location Reporting. Note that this does not affect the ability of your apps to use your location to refine searches, for example.
8. Widgets are definitely a cool feature that makes Android unique, but some of them also contribute to battery drain--specifically the ones that need to access the web to update their information (think weather widgets). Review your widget use and remove the ones you really don't use.
9. Live wallpapers, another feature that distinguishes Android, can also use up power like crazy--typically the ones that are very graphics/animation intensive, or the ones that also access the web for information like weather. Use static wallpapers instead, but if they're too boring.
10. Vibrate uses a lot of power. Do you really need your phone to ring and vibrate at the same time? Do you really need the haptic feedback when you're typing (especially if you're using Swype-style gesture typing)? Turn off vibrate.
11. GPS is another big power-sucker. For most location-based apps, using Google Location Services (based on the wifi hotspot's MAC address or by triangulating your nearest cell towers) is enough, since it generally locates you accurately within about 100 meters. Use GPS only if you need a more precise location, like if you're driving and using Navigation. Otherwise, turn off GPS by changing the setting to "Battery Saving."
12. You never know what kinds of processes the bloatware on your device might be responsible for, but they might be contributing to battery use as well. Go to Settings/Apps/All Apps, go through the list, and disable any bloatware apps that you don't need. Be cautious that you don't disable an important system app--if you aren't sure, just post a question in one of the AC Forums, and someone is bound to know.
13. Understand how Android utilizes RAM, and resist the urge to use task killers. To understand how things work, read this article by the esteemed Jerry Hildenbrand here, as well as this guide by Ambassador extraordinaire Golfdriver97. Apps that you kill manually will often restart on their own, which in itself takes a little bit of CPU and battery power--so if it's happening hundreds of times a day, it can become significant. The main reason to use a task killer is if there is some runaway process that you know is bogging the system down and won't shut down on its own. It might still restart on its own--if the cycle keeps happening, it's probably a problem with the app, which should be uninstalled or disabled.
14. Poor cell reception kills battery, because the radio is working overtime to try to establish the connection. If you know you're going to be in an area of poor reception for a while, consider turning on Airplane Mode to temporarily shut off your cell radio. You can get some idea of how much time you're spending in an area of poor signal by going to Settings/Battery, tapping Cell Standby (if it's there), and seeing if it says how much time without signal there was.
15. If none of the above tips are helping, then try wiping the cache partition, which is the portion of memory where Android stores a lot of temporary data. It's a little different from clearing the cache of individual apps, because the cache partition also stores a lot of temporary data used by the system. You need to access your device's recovery menu in order to wipe the cache partition, and this process varies with the device, so the best way to learn how to do it is to do a web search for "wipe cache partition [your device name]."

Not really a fan of threads like this, basically they say turn the cool features of your phone off to save it's battery? Yes I still read them in case someone comes up with something interesting or innovative but generally all the same don't use some of the best features of your phone.
We're not iPhone users buy spare battery.
Sent from my SM-G900F using XDA Free mobile app

Try a custom kernel

So is there a fix for battery drain? i keep reading all these threads about basically turning off everything no your phone. my problem is i used to have everything on my phone on and still was a good 50% battery life left at the end of the day. this was with heavy use as well. a lot internet surfing, youtube, gaming, location was turned on. I was loving my battery life. Now, seemingly over night my battery is horrible. i cannot make it to the end of the day with almost no use, i now have to charge it half way through the day to get it to last me until 9 oclock or so. my battery is now at 70-80% after a couple hours with absolutely no use. any idea or fix for what has caused this sudden drain of my battery?

Personally I use apps that close apps that automatically (autorun pro is my favourite) start block ad's etc I get a good days usage from mine.
It's a compromise but I carry a spare battery as well
Sent from my SM-G900F using XDA Free mobile app

So I found out my issue was my email app. I cleared the data on it and now I'm back to having a 50% battery left at the end of a day with heavy use.
---------- Post added at 08:36 PM ---------- Previous post was at 08:28 PM ----------
So I found out my issue was my email app. I cleared the data on it and now I'm back to having a 50% battery left at the end of a day with heavy use.

Turning off all features that make a phone "smart" is like buying a luxury Mercedes and ignore all those functions and use it as if it's a cheap Chinese car! If I want to use my phone just for SMS and Call why not buy a Nokia 1100 and buy a tablet to check my emails, viber and all other apps!
I bought a Galaxy S5 to utilize those functions. Anyway, previously my phone used to drain its battery in 6 hours! by adjusting my setting to the following I could increase the battery life to 14 hours! (I know it is still low but way better than 6 hours!)
1. Decrease the BRIGHTNESS as low as possible. For casual use we do not need a bright screen! whenever you wanna check an important photo you may increase the brightness temporary. (only by this you can have extra 2 hours or more)
2. Turn off unnecessary syncs, I do not need to have my contacts synced with 10 servers! Allow your phone to sync them with only one account ( I did it for Google only and turned off Samsung acc. dropbox, ChatOn and ...)
3. Do not add so many email accounts to your phone! Just add those you use frequently ( I have 5 emails and only 2 of them are vital for me!)
4. Set your location to use wifi only, and turn your GPS on only when you want to have a turn-by-turn navigation ( built in GPS can drain you battery in less than 1 hour!)
5. Turn off Push notifications for Games. ( you do not miss anything if you attend to your games 1 hour late!)
6. Uninstall those communication apps that are not necessary, you do not need to have BBM, Viber, Line, Whatsapp, Telegram, Hulu, Wechat and ... Keep those that you use frequently (In my case I kept Viber and Whatsapp only)
7. Uninstall any Anti-virus app! The likelihood of getting malware or virus if you install apps from Google Store is almost zero, so you only allocate some RAM to an useless app for doing nothing! If you wanna have any I recommend "360 Security" as I learned it uses only 6 mb of RAM and you can turn off real time protection.
By doing the above things I could get 8 hours extra from my phone!

It also a good idea to check which apps 'Autorun' when your phone restarts. SD Maid (maybe PRO version) has an AppControl option that lets you toggle autorun on or off.

[HOW-TO][NEWBIE GUIDE] Optimize & proper set up your Galaxy S6 Edge (stock firmware)

[HOW-TO][NEWBIE GUIDE] Optimize & proper set up your Galaxy S6 Edge (stock firmware)
As I've read across this forum and on several specific threads related to usage, battery life and so on, as well as discussing with some of my friends having a S6 or S6 Edge, I realized that most of the people don't really know how to properly set up their phones or how to use them efficiently.
OK, I get it, this is a fancy phone, not every owner is a developer or tech guy so it might be that many choose it based on the looks and don't really know how to optimize it...then they start complaining about different things like lag or battery drain not knowing that most of the problems are caused by miss-usage or improper setup. Of course there are bugs too, nothing is perfect. Of course there are many firmwares available and some are market or carrier dependent so some features or settings might be missing from some of them or even work differently.
What I will try here is to provide some guidelines and tips for setting up various things on the phone in order to maximize it's battery life and for a better usage. I will also make some recommendations based on my experience, tests and usage that might not apply to everyone. Use common sense and logic to apply similar settings in your particular case. Don't come screaming that you made that or that and now something is not working.
And YES, I know there are similar guides like this posted over the Internet and I'll probably make similar recommendations here too but I couldn't find such a guide here on XDA that is particular to this phone (if there is a better one than you might as well ignore mine).
All these things I'll describe below are applicable to any STOCK, NON-ROOTED 5.1.1 firmware and won't break warranty or your phone.
Now that was a long (and maybe unneeded introduction) but I thought to write this for everyone...let's start.
Model No.: SM-G925F
Android: 5.1.1 r2 (LMY47X)
Baseband: G925FXXU2QOI7
Kernel: 3.10.61-5672012
Build date: Fri Sept 4 2015
Carrier: Orange RO
DISPLAY
First I would like to say some words about the display. We have a great display, high resolution and it is most likely the biggest battery drain factor. There are two major things about it that you should keep in mind and will help you to get a better battery:
1. It's AMOLED...that means that the black pixels on it will consume no power because are not lit. Studies showed that even if not completely black, AMOLED displays use less energy if the displayed picture is darker compared to a lighter one.
2. The brightness level. Most people use it on "auto" or high level settings and this will be a major drain factor.
You can drastically lower the battery drain caused by your screen by selecting as much as possible dark (black) backgrounds and/or themes. There are some nice ones available in the Theme Store (my favorite is the Dalkomm Coffee Theme), that make most screens and menus dark/black. Also choosing a dark wallpaper for lockscreen/homescreens will help.
Don't use screen brightness at maximum...never. You don't need that in 99% of the cases. Also you won't probably need the automatic setting either since most of the people are spending most of the time indoors (either at work or home). A low manual setting will be fine most of the time, I have it set up at about 20% and only need a brighter one when going out. At that time I just tap on "auto" and it'll increase based on ambient light level. So you don't even need to tweak it alot every time. Find a low manual setting that's fine for your eyes and just tap on "auto" when you go out in sunlight.
CONNECTIVITY
Another battery drain factor is your multiple connection/radios features. In most cases you use just several: Mobile Data, WiFi, GPS/location and BT (when applicable). That means you should turn off all the others you don't use...NFC or BT (when not connected to a headset or car-kit or not listening to music). I don't listen to music and don't have a BT headset so I mostly not using BT (just when I'm in my car) and almost never use NFC so I have both disabled and I enable them only when needed via the Quick Settings.
WiFi
WiFi should also be properly setup otherwise it'll have impact on battery. It was incorrectly assumed or considered that keeping WiFi on all the time will drain battery faster. That was proven in different tests that's not true and in fact keeping WiFi on all the time won't make a big difference and in some cases was even better than to turn it off/on. I think is something similar with the car engines that suck more fuel when started that when running at idle. The major power drain is not when WiFi is running while is not connected to any network, but when the WiFi radio is powered up. When is on and not connected, it's going into a lower power state so the battery consumption is negligible.
I had a case with one of my friends that had WiFi setup to turn off when display was off...wrong choice, he got about 30% battery drain overnight because instead of having it connected to his home WiFi, the phone was using his 4G/LTE connection to make all the background sync/updates. That was eating his battery and also his data plan. After setting WiFi to "always" his overnight drain lowered to as little as 2-3%.
In some regions/carriers there are 2 other settings that were proven to help battery life: WiFi calling and VoLTE. I don't have either of them but based on different articles and what people say, they surely help with that so don't forget to turn them off if you don't use these features.
You might also want to try turning off "Always allows scanning" and "Smart network switch". I have the second turned off but I keep on the first one. Basically the first option tell the Location service to use WiFi for locating the device even if WiFi is switched off (by the on/off switch) so that means the radio is active. Second option should make you switch faster from WiFi to mobile data in case the WiFi signal is not strong enough or fluctuating. In my country there are plenty of WiFi hot-spots and they have mostly good connections so I don't use this feature.
GPS
Well here the opinions are split but I am currently having it ON all the time and Location Service is set to "high accuracy". I personally haven't noticed such a major difference with or without it so I preferred to let it on as it is used by many apps or services. You can try to set Location to "wifi and cell only" but don't think that will bring you a major benefit.
RUNNING APPS/PROCESSES
Well this is an important one. I've initially started to turn off/disable/uninstall everything I don't need or use. This can be done mostly from the Settings - Applications - Application Manager or if you want to go further, you can install Package Disabler Pro from PlayStore, about which I'll detail later.
Now why we should do that? There are lots of apps, processes and background services running on our devices that take care about all the things we do on the device. The problem is that ALL are using resources: processor time, memory, space and so on. In the end these are translated for a user in LAG or battery drain. Of course we cannot kill everything and I learned long time ago that installing Task or memory managers on Android it's the worst thing you can do. Android it's smart enough to take care better about it's resources and processes (at least to a certain point) and keep killing a certain process won't give you more battery life but will eat more of it in the end,
What I wanted to say is you shouldn't start disabling, killing or blocking everything cause you might end up with an unstable or not properly working phone (case in which only a factory reset might help). First of all look at the ALL tab in Application Manager and try to identify what you don't need or use. For example I'm certainly not using some things like: music, books, news feeds, Samsung's keyboard (I use SwiftKey), the TouchWiz launcher (I use Nova), health services or whatever, S-Voice, S-Health, S-Finder, I don't have any smartwatches so I don't use any Gear processes, fancy device wake-up functions (like wave gestures) or animated wallpapers either.
So after all considerations above, you decided that you can safely disable some apps/processes. All good but you'll quickly learn that some of them cannot be disabled via Application Manager (the "disable" button is grayed out). Now what? Well here comes handy that Package Disabler Pro that I've told you about in the beginning. That app is able to disable ANY apps/processes on your phone, including those that are protected and cannot be disabled via the normal way (and yes it can do that without being rooted). The downside of it is that you must be careful what you choose to disable not to have something that is needed for the normal functionality or the apps you're currently using. The app has also a backup/restore function (via an xml file) for saving the list with apps you have disabled and easily import them back after a factory reset for ex. I've added to this thread my list of disabled apps as it is exported by the application (just unzip and copy the file on the root of your internal memory and it can then be imported in the Package Disabler app)
Another important thing is WHAT apps you're using. I know that socializing and social networking are some of today's most trendy things but keep in mind that some of the apps used for that are not so well made. An example could be the Facebook app/messenger which are reported to drain alot of battery. RSS feeds, news feeds, multiple weather apps or widgets, all contribute to battery drain and lag. Don't install several apps/widgets for the same purpose (like several calendar apps or weather apps). Each will take resources and won't have an added value. Want to use another weather app/widget than the one coming with the phone? Fine, install it...but don't forget to uninstall/disable the built in one or others that do the same thing. Same goes for keyboard for ex; I use SwiftKey for years and got used with it. For me it's better than any keyboard that Samsung might put on the device, therefore I've disabled the standard Samsung keyboard. I also don't like TouchWiz launcher and use Nova that offers me much more flexibility so...I've disabled both the "easy" and "regular" TouchWiz launchers. I went to the point that I've even disabled the different embedded font types, you have 5 of them and I doubt someone uses more than one at a time.
So as you all can see it's not only a matter of setup but also a matter of usage. When you have a device you have to use it properly otherwise it'll not perform as you expect. Imagine a car that has a manufacturer fuel consumption value of 5.5 liters/100 Km....that's under certain conditions not on ANY type of driving. Fly with 200+ km/hr on a highway and I'll guarantee you won't have 5.5 liters/100 km consumption. That doesn't mean the manufacturer has lied or mislead you. Same goes with a phone, if you don't know how to use it and optimize it, you'll have a bad experience.
I work in the IT industry for years and I mostly laugh when I hear someone advising somebody to reinstall the operating system to solve a problem. Same goes for "factory reset" for a phone. Yes, this method works some times but that won't solve the root cause of an issues if you're using it the same way. After several days it'll perform as bad as before and you'll just say that "factory reset" did nothing. Of course it didn't...YOU have to do something different, not the phone.
Now I apologize for the long post and I do hope that at least some will learn to better manage their devices and to understand what they're doing not just running certain commands or procedures blind. Both S6 and S6e are great devices but we should learn how to properly use them in order to benefit the most from them...otherwise we just come here asking for help or mumbling about what crap devices they are.

Thank you, I will check to see if I get an improvement on the standby battery drain.

Your part about not setting the screen to Auto is flawed. You mention that we are mostly indoors, and you don't need a brighter screen for that. Auto mode also knows that and sets the brightness lower. It already does automatically what you do manually.

Tnx. And yes....keeping screen at 20% brightness and just switching to auto when in outdoors works great for the battery life.

ArmedandDangerous said:
Your part about not setting the screen to Auto is flawed. You mention that we are mostly indoors, and you don't need a brighter screen for that. Auto mode also knows that and sets the brightness lower. It already does automatically what you do manually.
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Click to collapse
Not quite, I've tested it. If you're on "auto" and use a lower setting on the slidebar, in a dark room the screen is too dark, you'll have to turn off "auto" and the manual brighteness set on the same level will be much higher than on auto.
Now if you have such good eyes and you're able to use "auto" in all cases with the slider at 20% that's good for you...unfortunately I am not so that's why I use it as I've described. The point is that "auto" mode consumes MORE battery regardless of how it's set, than a lower 'manual' mode. So I preffer to have it like this than to use auto all the time.

Thanks for the awesome guide. I'll start disabling some useless processes and see how my battery life is working. Anyway without much editing the battery of S6Edge is pretty good. I can use it a whole day and still 19% remaining. As a comparison I wasn't able to do it with my S3 having to recharge it 2 or even 3 times at day.
Again, thanks for the guide!
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