Save battery by keeping WI-FI alive... - Galaxy S II General

This tip is one that seems counter-intuitive, but you can save a lot of wear and tear on your Android phone's battery if you tell it to keep the Wifi radio turned on and connected while the phone is sleeping. Your phone needs a lot of juice to keep pinging those cell towers, and even more to transmit data to and from them. Wifi radios use much less power because of their design, and they don't have to keep searching for a better access point. It's the way cellular data communication was designed, and it's a necessary evil.
But what if you're spending all day (or all evening) in one place, connected to Wifi? If you tell your phone to shut off Wifi when idle, it bounces back to cellular data (be it 2G, 3G, or 4G) and starts sucking down the electrons again when the screen shuts off. That's no good, and easy to fix:
Open the advanced Wifi settings by pressing the menu button, then Settings, Wireless & networks, Wi-Fi settings, and tapping the menu button again. You'll have a choice to either Scan, or go Advanced -- go Advanced.
Tap the Wi-Fi sleep policy entry, and you'll get a pop up dialog with the 3 choices. Choose Never.
Now even when your phone goes into standby mode, you'll stay connected to Wifi and be able to get mail and messages without turning the cell radio back on and trouncing your battery life. And for the times when you're not in an area with a Wifi connection, just shut Wifi off, either through the menu or with a handy toggle widget. Your battery will thank you for it.

If you're going to copy and paste directly from Android Central, the least you could do is give them credit.

kcaz said:
If you're going to copy and paste directly from Android Central, the least you could do is give them credit.
Click to expand...
Click to collapse
i thought as much myself.

as far as i understand, this is useful if you also have and use internet from the carrier, so if you keep wifi on and use it rather than 3g, which uses more power, you will have lower battery consumption. but if you are not synchronizing data during night, by keeping all connections off, you will not need to keep wifi on, am i right?

kcaz said:
If you're going to copy and paste directly from Android Central, the least you could do is give them credit.
Click to expand...
Click to collapse
Haha it was the "counter-intuitive" that gave it away right?
As soon as I came to those words I knew it was copy pasta!

Yeah I accept that I copy pasted from android central..... And also I am not taking any credit for that.. I am jst sharing it. It might cme usefull 4r sme1 aroundhere..
Sent from my GT-I9100 using XDA App

I find that turning Data and WiFi off when not required is the simple solution .
jje

JJEgan said:
I find that turning Data and WiFi off when not required is the simple solution .
jje
Click to expand...
Click to collapse
yep! during the night i do the same!
besides: the reason why OP got better battery with wifi turned on (when screen off) is that this avoids the android OS bug (suspend & event/0)...
with wifi turned of my battery life increased dramatically, switching data off additionally has only a minor effect then!

koolshubh said:
Yeah I accept that I copy pasted from android central..... And also I am not taking any credit for that.. I am jst sharing it. It might cme usefull 4r sme1 aroundhere..
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
you are taking the credit by writing the post like its you , you should link your source and quote them not just post their post on a different website!!
yeah sure some may find it usefull but you should still do it properly and quote and link them

yea its writing down @ power save settings.

Just use JuiceDefender man. Will help you more than Android Central tips

This actually kills my battery since I have a d-link lol.

Disfected said:
This actually kills my battery since I have a d-link lol.
Click to expand...
Click to collapse
You should try Cisco then
Sent from my SGSII using xdaPremium

This is the worst thing you can do in terms of battery life on SGS2, since this kicks the famous Android OS bug into high gear, especially on D-Link class routers. With wifi sleep set to never, my SGS2 loses around 10% an hour just sitting completely idle.

Mine was set to never as default.

aydc said:
This is the worst thing you can do in terms of battery life on SGS2, since this kicks the famous Android OS bug into high gear, especially on D-Link class routers. With wifi sleep set to never, my SGS2 loses around 10% an hour just sitting completely idle.
Click to expand...
Click to collapse
+1
Sent from my GalaxyTab using xda Premium

Related

So... is the LEO finally an Always-On device?

Hi everyone!
I'm having a tough time deciding whether to get an HD2 or a Nokia N900, mainly because of one main feature on the N900: As far as I can tell, the Nokia N900 allows you to stay online (Instant Messaging, VoIP) permanently, even when the device is in standby - so ICQ, Skype, SIP, MSN are all connected, and if you get a new message or a call, the device will notify you.
I haven't used many modern WinMo devices, so I'm not sure if anything similar to this is possible with WinMo 6.5 (I've used WM6.5 ROMs on my Prophet, but I'm guessing a lot of features were stripped out to make them run at all )... is it possible to do this on the Leo?
I want the device to _always_ be online - if there's WiFi it should connect to that, and if not then it should connect to cellular data. This should obviously also be automatic, so that I don't have to manually log onto the WiFi every time I get home or to university...
Is this use supported? Or would it be more of a hack that runs down the battery like crazy (IIRC you can turn on WiFi permanently, so that it doesn't turn off when you put the phone in standby - not sure if the apps would stay connected, though)...
Thanks in advance!
I think the HD used to turn wifi off when the phone went into standby (I don't think I ever used wifi), but it used to stay connected over 3g for IM and the like when you turned the phone off (stand by)
Oh really? I thought 3G was turned off too... well, I guess that's a step in the right direction.
Anyone know about WiFi and automatic switching?
By default the WIFI is switched off when in standby, but it's possible to change it.
However, having WIFI always on will drain the battery completly.
Regarding to the automatic change, no idea!
And there's no way to lower the WiFi signal strength enough so that it doesn't drain the battery? What if you set WiFi power mode to best battery? On my Prophet it's unusable because the signal is nearly nonexistant, but I was hoping that they'd have changed this for the HD2...
Ideally it'd lower the signal strength as far as possible without dropping the signal when in standby, and then power up to a sufficient speed when the device is actually on...
Wi-Fi only turns off if you want ot too. You can change the way Wi-Fi works in the settings and let it be always on, even if you turn off the screen.
Is this new on the Leo?
Does that drain the battery quickly? Or is it in a low-power mode?
Even with the Best battery setting it won't last too long, I'm afraid. Or, as you have said, it won't have good enough reception to actually connect to anything.
I have no idea how this is implemented in Nokias, it actually sounds like a kind of magic if you're saying it doesn't kill the battery.
I've never heard about an automatic switching solution (or even about the problem, for that matter). It's relatively easy to implement periodic polling but even that will have serious adverse effect on your battery.
bemymonkey said:
Is this new on the Leo?
Does that drain the battery quickly? Or is it in a low-power mode?
Click to expand...
Click to collapse
It's been on WM since times immemorial - it's a registry setting, and there are programs that allow you to change it without manually tweaking your registry.
Yes, it does drain your battery, even in low-power mode.
vangrieg said:
Even with the Best battery setting it won't last too long, I'm afraid. Or, as you have said, it won't have good enough reception to actually connect to anything.
Click to expand...
Click to collapse
Ah, so the Best Battery setting is still completely useless. Good to know.
vangrieg said:
I have no idea how this is implemented in Nokias, it actually sounds like a kind of magic if you're saying it doesn't kill the battery.
Click to expand...
Click to collapse
I'm not quite sure myself, but that's what a few of the nice people over at talk.maemo.org told me . I just hope I didn't misinterpret what they were saying
vangrieg said:
I've never heard about an automatic switching solution (or even about the problem, for that matter). It's relatively easy to implement periodic polling but even that will have serious adverse effect on your battery.
Click to expand...
Click to collapse
Meh. Think 12 hours is doable with polling?
vangrieg said:
It's been on WM since times immemorial - it's a registry setting, and there are programs that allow you to change it without manually tweaking your registry.
Yes, it does drain your battery, even in low-power mode.
Click to expand...
Click to collapse
OK, so it's the same feature that's existed for a long time... I thought it was something new, that actually made sense (i.e. didn't drain the battery so frikken fast...).
Please note that I don't have HD2 myself, so I can only guess how it's going to work there.
Meh... you sounded so authoritative that I figured you must have one
bemymonkey said:
Ah, so the Best Battery setting is still completely useless. Good to know.
Click to expand...
Click to collapse
Who says it's completely useless? It does save battery, I use this mode all the time on HD. Speed is lower though.
bemymonkey said:
Meh. Think 12 hours is doable with polling?
Click to expand...
Click to collapse
It definitely should last 12 hours unless you poll every 5 seconds or so, but what will happen if it connects to Wi-Fi while in your pocket?
vangrieg said:
Who says it's completely useless? It does save battery, I use this mode all the time on HD. Speed is lower though.
Click to expand...
Click to collapse
Oh. I thought you said there were problems with getting enough reception to connect
That's usually the case on my Prophet...
vangrieg said:
It definitely should last 12 hours unless you poll every 5 seconds or so, but what will happen if it connects to Wi-Fi while in your pocket?
Click to expand...
Click to collapse
It's supposed to connect, and disconnect 3G to save on data costs (probably getting a plan with a 200mb cap...)
bemymonkey said:
Oh. I thought you said there were problems with getting enough reception to connect
That's usually the case on my Prophet...
Click to expand...
Click to collapse
I think I said the Best Battery mode still drains your battery. A much lower power mode would have trouble connecting.
bemymonkey said:
It's supposed to connect, and disconnect 3G to save on data costs (probably getting a plan with a 200mb cap...)
Click to expand...
Click to collapse
Sure, but you'd also drain your battery without noticing. I would certainly be cautious about it - I can connect to WiFi at work, at shopping malls, cafes, and sometimes even in the streets. I don't want to end up being unable to make a call because I saved a couple bucks. But maybe that's just me...
BTW, I did a quick poll here at my office - all Nokia owners have this feature disabled, they say it drains battery rather quickly. This is not in any way a scientific research, but I don't believe in miracles anyway.
vangrieg said:
I think I said the Best Battery mode still drains your battery. A much lower power mode would have trouble connecting.
Click to expand...
Click to collapse
vangrieg said:
Even with the Best battery setting it won't last too long, I'm afraid. Or, as you have said, it won't have good enough reception to actually connect to anything.
Click to expand...
Click to collapse
That's what I meant
vangrieg said:
Sure, but you'd also drain your battery without noticing. I would certainly be cautious about it - I can connect to WiFi at work, at shopping malls, cafes, and sometimes even in the streets. I don't want to end up being unable to make a call because I saved a couple bucks. But maybe that's just me...
Click to expand...
Click to collapse
Hmmm, there should be a way to limit which networks it should connect to
vangrieg said:
BTW, I did a quick poll here at my office - all Nokia owners have this feature disabled, they say it drains battery rather quickly. This is not in any way a scientific research, but I don't believe in miracles anyway.
Click to expand...
Click to collapse
Uh... what Nokias? I doubt it's the same thing, because the N900 is the first Maemo phone
E-something Nokias primarily - they have this auto WiFi feature, don't they?
Don't know anything about this Maemo thing you're talking about, obviously.
http://maemo.nokia.com/n900/
That's what I'm trying to decide... N900 or HD2
I leave MSN loged in on my diamond all the time. Wifi is on. it turns wifi off in standby, but msn stays logged in over the normal network connections, I alerts me I receieved a msg in the same way it does with a text. When it comes out of standby it auto reconnects to wifi.
Does that work on Fring as well?

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

Battery Issue Finally Fixed

I read on another site to simply turn off the always on in the wireless settings (not the background data in the sync menu) and my battery life has at least doubled. I was worried that my e-mail would not download or other apps would not work, but all my email still comes. The trick is that while your phone is in sleep mode it does not look for email, but once you use it the phone will get your email. Unless you MUST get your email right away, I would highly recommend changing this setting. All input would be greatly appreciated, I want to see if my good luck is working for other people. On a side note I am using Fresh ROM 2.0d.
Could you post the specific path to the setting you're talking about?
If I set my wifi to anything other than "never sleep", then once my phone goes into sleep mode I have to follow a long, convoluted, pain in the ass procedure to get wifi to work at all.
Hopefully that's not the setting you're talking about?
I posted this exact same thing in another thread two days ago. I was so stoked on my battery performance that I wanted to tell others. It's incredible the difference it makes! If you want even better performance go into Settings>Location...uncheck the use wireless networks box, and check the use GPS. Believe it or not the GPS uses a lot LESS battery life to detect your location than the wireless networks.
I'm getting like 2 whole days out of my phone now after doing these things...and that's with pretty moderate use. Hope other people try it out too.
subliminalurge said:
Could you post the specific path to the setting you're talking about?
If I set my wifi to anything other than "never sleep", then once my phone goes into sleep mode I have to follow a long, convoluted, pain in the ass procedure to get wifi to work at all.
Hopefully that's not the setting you're talking about?
Click to expand...
Click to collapse
+1
where are these options?
I agree, I used the GPS as well, not the use wireless network. I forgot about that one. Your phone will only use the GPS when it needs it, not all the time like we used to think. The exact settings are at MENU/SETTINGS/WIRELESS & NETWORKS/MOBILE NETWORKS\AND UNCHECK ENABLE ALWAYS-ON MOBILE
alexthearmo said:
If you want even better performance go into Settings>Location...uncheck the use wireless networks box, and check the use GPS. Believe it or not the GPS uses a lot LESS battery life to detect your location than the wireless networks.
Click to expand...
Click to collapse
This will vary from person to person. It will depend A LOT on how good your coverage is in the spot you're currently at.
GPS is GPS. It will require the same amount of juice anywhere on the planet.
Cell chips are different. They are hardcoded to give more electricity to the radio circuit when the signal is weak, for obvious reasons. So if you have a cell tower in your back yard, then yeah, you'll get great battery performance relying on cell based options. If your nearest cell tower is 4 miles away, and you're one of those people that loses signal when you go into your basement, then telling your phone to use cell info is only going to chew up battery even faster....
no thanks. This isn't a fix, it's a pref change.
Fix would mean that everything stays the same and you just get better battery life.
But, good advice none the less, just not for me.
scirio said:
no thanks. This isn't a fix, it's a pref change.
Fix would mean that everything stays the same and you just get better battery life.
Click to expand...
Click to collapse
Yeah, people on the forum use the word "fix" WAY too quickly.
"Fix" means everything works like you would expect, and like it should. Around here, people use the word "fix" when what they really mean is "here's a half-assed workaround that's a complete pain in the ass, but it will get 10% of the people by until something better comes along...."....
scirio said:
no thanks. This isn't a fix, it's a pref change.
Fix would mean that everything stays the same and you just get better battery life.
But, good advice none the less, just not for me.
Click to expand...
Click to collapse
+1 - 6 minutes and counting to receive a test / text msg, while phone is sleeping. Nice the know though, if I need to really trade connectivity for battery duration. I should test whether sms polling is tied to the email polling interval. Cause it ain't interrupt driven with this setting.
edit: i know it's not really sms polling, but rather the lack of an interrupt(-ion of sleep).
Yes, you are right, it is not a fix, but a great way to increase battery life and like I said, everything works the same. I get messages the exact same way and email will go straight to my phone once I use it.
bigupurself7 said:
Yes, you are right, it is not a fix, but a great way to increase battery life and like I said, everything works the same.
Click to expand...
Click to collapse
You sure about that?
When my wife sends me a text, I want to see it 5 seconds later, not 5 minutes later.
That may not matter to you, but when you make a statement to the whole world, you have to realize that some of us care about things that you might not.
How thoroughly did you test before you decided to say "everything works the same"?
Did you really test EVERYTHING? Or did you just test "everything that matters to you"?
I used to turn off background data and stuff on my stock 1.5, and I was thrilled I could actually leave it on with 2.1 so I wouldn't have to wait for google voice texts and gmail to come in. With 2.1 I can go the whole day with moderate usage and still have 40% at least left when I go to bed. Let it charge overnight and I'm good. This is good to know though if I am out in the sticks in a pinch and need the extra battery.
maybe it's different in 2.1 but in 1.5 i tried turning off the "always on" setting under mobile network settings under wireless controls but i found that after a while the phone will fail to restart evdo upon awakening and the only way to fix it is reboot. Never tried it on 2.1 but to me between the time on without signal fix nd upgraded radio i get all the battery life i need...
I get messages right away. I just got another one, tested it with a friend and it came right away!
On a side note, messages and phone calls have nothing to do with the internet. Remember we used to get text messages and phone calls way before smart phones.
bigupurself7 said:
On a side note, messages and phone calls have nothing to do with the internet. Remember we used to get text messages and phone calls way before smart phones.
Click to expand...
Click to collapse
Key words... "Used to"....
trust me, it works for me, wish it worked for you guys. its great having amazing battery life!
bigupurself7 said:
trust me, it works for me, wish it worked for you guys. its great having amazing battery life!
Click to expand...
Click to collapse
But at what cost?
That's the big question here. Are you 100% sure that you're not missing any communications, or having them delayed?
I'd LOVE to have better battery life, but when it comes down to it my phone is a communication tool. If any battery tweaks delay messages, then they're WORSE then useless, they're actually harmful.
If I wanted to use my phone as a half-assed replacement for a PSP, then I'm sure I could squeeze some amazing battery life out of it, too. But above all, and with NO compromise, I must be able to send and receive communications instantly.
That's what a phone is.
bigupurself7 said:
trust me, it works for me, wish it worked for you guys. its great having amazing battery life!
Click to expand...
Click to collapse
Have you rebooted while in that mode?
Yes I have rebooted and just did another test. Got the text right away. Even more interesting is I have a program called Mobile Defense which can find your phone if it is missing and that works as well since it is all done through text messages.

Some NEWBIE question Please help!

I just picked up the verizon tab. Need a little newbie help. Having a few issues
1- How do i prevent battery drain when the unit is off at night but not on a charger it seems i lost battery life
2- How do i know what data source is being used when 3g or wifi both icons are showing on at the same time. if i just want use wifi how do i turn off the 3g radio?
3- anyone get allshare to work? whats the best way to stream stuff from the pc to the gtab?
4- when the battery was at 10% i couldnt adjust the screen brightness anymore it was dark. is that normal?
5-Any battery life tips? get the most out of the battery?
thanks!!!!
sillyrabbitt123 said:
I just picked up the verizon tab. Need a little newbie help. Having a few issues
1- How do i prevent battery drain when the unit is off at night but not on a charger it seems i lost battery life
2- How do i know what data source is being used when 3g or wifi both icons are showing on at the same time. if i just want use wifi how do i turn off the 3g radio?
3- anyone get allshare to work? whats the best way to stream stuff from the pc to the gtab?
4- when the battery was at 10% i couldnt adjust the screen brightness anymore it was dark. is that normal?
5-Any battery life tips? get the most out of the battery?
thanks!!!!
Click to expand...
Click to collapse
1 - battery drain in standby shouldn't be significant but you can reduce it by turning off radios you don't need and/or reducing the update interval of any apps you have checking in the background.
2 - I'm not sure what's happening here, usually the wifi logo overwrites the 3g one so it is obvious which one is in use (at least it does on my UK SGT, might be different for CDMA). Either way switching on and off the various radios is easily done from the notification area, just swipe down from the top of the screen to show toggles for wifi, bt, gps, silent mode & orientation lock.
Edit: oops, I miss remembered, I don't know of an easy way to switch the mobile radio.
3 - I had a bit of a play with allshare day one but haven't had time to give it a proper workout yet.
4 - I haven't had mine run down that far but it sounds like a sensible power saving measure, better to see it dim for a while than bright for two minutes!
5 - the screen auto adjust in the display settings seems to help a lot. Other than that I've found the battery life to be very good for the most part. I tend to only switch on wifi if I have a big download to do so that might help in my case.
Welcome by the way, hope you enjoy the tab!
Bill
Sent from my GT-P1000 using XDA App
obzbdc said:
Edit: oops, I miss remembered, I don't know of an easy way to switch the mobile radio.
Click to expand...
Click to collapse
Hold the power button for a couple of seconds, you can toggle mobile data from the popup menu.
Sent from my Galaxy Tab
huggsy said:
Hold the power button for a couple of seconds, you can toggle mobile data from the popup menu.
Sent from my Galaxy Tab
Click to expand...
Click to collapse
I just found that myself and headed back here only to have been beaten to the punch!
Sent from my GT-P1000 using XDA App
obzbdc said:
1 - battery drain in standby shouldn't be significant but you can reduce it by turning off radios you don't need and/or reducing the update interval of any apps you have checking in the background.
2 - I'm not sure what's happening here, usually the wifi logo overwrites the 3g one so it is obvious which one is in use (at least it does on my UK SGT, might be different for CDMA). Either way switching on and off the various radios is easily done from the notification area, just swipe down from the top of the screen to show toggles for wifi, bt, gps, silent mode & orientation lock.
Edit: oops, I miss remembered, I don't know of an easy way to switch the mobile radio.
3 - I had a bit of a play with allshare day one but haven't had time to give it a proper workout yet.
4 - I haven't had mine run down that far but it sounds like a sensible power saving measure, better to see it dim for a while than bright for two minutes!
5 - the screen auto adjust in the display settings seems to help a lot. Other than that I've found the battery life to be very good for the most part. I tend to only switch on wifi if I have a big download to do so that might help in my case.
Welcome by the way, hope you enjoy the tab!
Bill
Sent from my GT-P1000 using XDA App
Click to expand...
Click to collapse
THANKS Bill! Appreciate the info/advice!
I guess I am getting confused between the 3g/ the strength bars. So if it doesnt say 3g but just shows signal strength then its probably using wifi?
Does anyone know if the SGT defaults to wifi first then to 3g? Just curious.
huggsy said:
Hold the power button for a couple of seconds, you can toggle mobile data from the popup menu.
Sent from my Galaxy Tab
Click to expand...
Click to collapse
THANKS. If you are home do you leave the 3g off? and just work off of you wifi connection? or do you leave them both running at the same time?
thanks
sillyrabbitt123 said:
THANKS. If you are home do you leave the 3g off? and just work off of you wifi connection? or do you leave them both running at the same time?
thanks
Click to expand...
Click to collapse
When wifi is on it turns 3g off. I use an app called tasker to save my battery. I have it set to turn wifi/3g off when the screen turns off, and if I place it face down it sets the device into airplane mode, left in this state the battery drains very slow when not in use. Tasker is not the cheapest app but you are only limited by your imagination what you can do with it.
Sent from my Galaxy Tab
Thanks for the info. I will check it out. Much appreciated!
Anyone else know how to use allshare? According to samsung you cannot stream from your pc to the tablet is this correct?
i am actually trying to do both stream from the pc to the tab and then seperately stream from the tab to the tv or blu ray player and or pc and nothing works any which way? not sure how to get this to work?
thanks
AllShare is an app that you can use to connect to other Samsung AllShare enabled divices like TV's. I removed the app. It is completely useless. (It would be so nice if there was an app by which I could connect to my homenetwork.)
Mado007 said:
AllShare is an app that you can use to connect to other Samsung AllShare enabled divices like TV's. I removed the app. It is completely useless. (It would be so nice if there was an app by which I could connect to my homenetwork.)
Click to expand...
Click to collapse
Not quite correct! It allows you to stream from/to other DLNA devices which includes some Samsung TV's, but plenty of other devices too.
For example, I use to it to stream from/to my PCs with Media Center.
Regards,
Dave
Mado007 said:
AllShare is an app that you can use to connect to other Samsung AllShare enabled divices like TV's. I removed the app. It is completely useless. (It would be so nice if there was an app by which I could connect to my homenetwork.)
Click to expand...
Click to collapse
I have been using allshare with my ps3. On the tab open allshare and select my device as a source. do not select a playback device. Then on the ps3 go to music / video /photo and select the tab
Sent from my GT-P1000 using XDA App
How do i connect eith all share to my pc? When i tried it only worked one way, from my Tab to the pc (and i like the other way around).
Another question: I removed OCLF can i flah a new rom (is it safe?) Thanks for answering.
Sent from my GT-P1000 using XDA App

Regarding Batteri Issues "Temp fix maybe"

Hey,
Iam getting my phone tomorrow, but i have been doing some reading in the different topics.
I found this link in one of the topics postet by "xdadroid88"(thanks to him
http://code.google.com/p/android/issues/detail?id=15057
i have read through it and this is the tips i found.
1. Set the wifi policy on "always on"
2.Location & Security -> Use wireless networks / Use GPS satellites. I've disable both options
3. switch off Latitude
Seems like this is a issue in Gingerbread 2.3.3 and is resolved in 2.3.4
Try this and post the results
So disable wifi/gps and battery is better? That's news!
Dont need to be rude, just trying to help, it can be a different problem on the sgs 2, just telling people what they can try and maybe maybe it works for some
Sent from my GT-I9000 using XDA App
CEPi said:
So disable wifi/gps and battery is better? That's news!
Click to expand...
Click to collapse
LOL.......
That's not even what he said, those settings are for letting your phone track your location. :-/
I'll give this a go OP and post tomorrow. Thanks.
the OP actually meant to say "wifi sleep policy". and yes the issue was with wifi. ironically setting wifi sleep to NEVER is better for battery life than letting it go to sleep, because when it switches back to 3g it uses more power. leaving on wifi always uses less power than leaving on 3G because of latency and other factors. counter intuitive but true.

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