Database Users

2 things that surprised me about battery

1. having GPS and 4G on doesn't seem to have a very noticeable effect on battery drain when phone is idle. I typically lose about 1% every hour in idle no whether these features are on / off. I'm sure this would be different in an area without 4G... the radio would probably go bonkers trying to find a signal.
this is pretty good to know. not only do i love having instant access to these services, but it also allows programs like where's my droid to send gps coordinates back if the phone is lost.
2. a reboot usually takes 2% off my battery life. Once it took 4%! wth!
Haven't done any experiements with leaving wifi on yet but would be interested on others' experience.
oh some other basic info:
-running stock rom
-i use task killer set on manual to kill all the nonsense sprint crapware once at start up
-running push gmail
-turned off facebook, friendstream, favorites
-beautiful home widget updates q2h

Supposedly WiFi and GPS do not draw any power unless the app asks for it. The reason people still recommend to turn them off is that you might have an app in the background trying to use these services and drain the battery.

ramiss said:
Supposedly WiFi and GPS do not draw any power unless the app asks for it. The reason people still recommend to turn them off is that you might have an app in the background trying to use these services and drain the battery.
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I can tell you that unless the battery stats app lies, this is not true. Wifi draws 2% or so on standby.

Interesting, is that 2% per hour? I keep meaning to do some extensive testing but currently I am only going off what I've been told.
Edit: Just a thought....You don't have it set to notify you in case of new access points do you?

ramiss said:
Interesting, is that 2% per hour? I keep meaning to do some extensive testing but currently I am only going off what I've been told.
Edit: Just a thought....You don't have it set to notify you in case of new access points do you?
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Click to collapse
If you don't set it to notify you then it doesn't auto reconnect to your existing hot spots. Also wifi is going to use power when it's on, but when you are connected to ask ap you are using less power than 3g.
Sent from my EVO using Tapatalk

anyone that can help me with battery life?

thiis thing dies on me really quick, at home not as bad when I'm on wifi, but i left this morning from my house, and by the time I got to work 45 minutes later i'm at like 90% and i've done nothing on the phone, not a thing, no text, no voice calls. time without signal is 0.
then of course I get to work and time without signal jumps to like 22%, but still, my blackberry didn't go dead in half a day. i'm running the mixup undervolted kernal and the epic experience rom.
I do run gps and normal phone settings but turning them off is really not an option, especially for my wife that just needs a phone that works and isn't dead before she is out of work, and she doesn't even use the phone.
am I doing something wrong or is the battery life really this crappy?
and it was worse before the new kernal on DI18, and way worse before that.

i use the same set up i got 10 hours under pretty use
try turning gps off at work

So what are you leaving on? 4g? Gps? WiFi? I found that using black wallpaper helps.

wifi and gps are always on, it seems its TWS that is killing it. at like 22% right now. battery is down to 83% right now 2 hours off charger. no voice calls or text calls.

If you are getting a tws of 50% then put your phone into airplane mode for about 10 seconds and then switch it back, you will see a dramatic decease in tws
Sent from my SPH-D700 using XDA App

Here's a few things you can do ...
1) If you have Sprint service in most places, turn off roaming (Settings, Call settings, System select, Sprint). This will disable roaming period so that all roaming services are disabled (i.e. you won't ever see the data roaming guard).
2) Download JuiceDefender beta (this turns off all data, i.e. Wifi / 3G, whenever your phone's screen is off, if you purchase UltimateJuice with it, you can schedule it however you want, and you can choose to allow some apps to always allow data to go through). This saves me a LOT of battery since my screen is usually off.
3) Try the TWS hack mentioned in the earlier post, it should be fixed in DI18, but some people are still seeing high numbers there.
4) If you're rooted, get an app like Autostarts and disable the DRM service from ever running. This was found to be a battery killer.
The biggest battery drainer of them all is the GPS, and then 3G. If you can minimize your uses with those, you will maximize battery life. Also, use Wifi in areas that have it because Wifi hardly drains battery at all compared to 3G. I haven't seen any kernel really that gets much more battery life than stock, so doing these things will help. I love the Epic, but the battery life is a real downer for me too. I've gotten a full day's use (medium use) at times, while some days it hardly lasts at all.

Yes do the airplane mode trick and turn off gps if you are not using it and DO NOT USE JUICE DEFENDER i get 45 hours battery life without it. that app runs constantly in the background and uses more battery. Juice defender is for lazy people that dont know how to find these data and sync settings that are already on the phone or you can download an app that will let you toggle whatever setting you need. Set emails to sync once an hour and if it is really a priority then go into the email account and push refresh.

If you are really getting 45 hours of battery while actually using your phone then will you please share all of the settings that you have that give you this kind of battery life
Sent from my SPH-D700 using XDA App

Use SetCPU, it will turn down the processor while the screen is off. Helped alot with battery life. =)

itsmebryan said:
I found that using black wallpaper helps.
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Click to collapse
I wondered if that would do anything. Considering how AMOLED works, dark themes and wallpapers *should* help battery life similar to reducing brightness.

Auto-Sync does some mean damage if your settings are too frequent, too. Try not to use Facebook/Twitter/Myspace integration, if possible, or disable them from syncing automatically, and sync them yourself when you feel the need.

Okay I don't know exactly what I did/didn't do but my battery problem seems to be greatly improved. Lets start with my details. Before 2 days ago. No matter what my use my battery drain would be approx 6-8% an hour. If I took my phone off the charger at 11am by 4pm I would be around 60%. GPS/4g/wifi off. Screen brightness set to lowest. tws not too bad. Using both the tws trick and drm stopped. Usually 2 or 3 phone calls 5-10 texts 5-10 minutes of browsing. I had a task killer installed but never used it to kill tasks just as an app switcher. Even after the di18 update no major difference. So the other day I downloaded an app called system panel. Another task manager. I deleted the task killer widget on my home page but no the app. The first day I took my phone off the charger used it for about an hour then put it back on the charger for about 15 minutes. When I took it off the charger it was at 96%. I opened system panel and killed all apps (necessary services/apps restarted immediately) did tws trick and drm kill. Same use as always after 8 hours my battery was at 80% a 16% drop. That's 2% an hour. The next day I deleted my task killer and over the same period of time I went from 96% to 83% (13% lose over 8 hrs) Only a little over 1% lose an hour. The only difference that I am aware of was the deletion of the task killer widget and then the app completely.

Sh0wNuF said:
If you are really getting 45 hours of battery while actually using your phone then will you please share all of the settings that you have that give you this kind of battery life
Sent from my SPH-D700 using XDA App
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Ditto, I'd like to hear what you're doing too ... even when I do not TOUCH the phone, I cannot get 45 hours. I think you're being a bit optimistic here.

Lmao No. Since di18 it has been great. I use my phone for a lot of stuff too. I have a live wall paper and rss feeds that update. email is set to once an hour. Now dont get me wrong if i play a game then it will suck my battery pretty good like 5% for ten minutes. i have a widget for sync settings. im rooted with ALL SPRINT apps removed i think thats the biggest thing. dont leave gps or other on if you are not using it. i do not have drm removed. i use full brightness. i talk a few times a day and dozens of text and web surfing. no juice defender or task killers. The object for me was to not have any unneccessary stuff run when it doesnt need to. so the phone is set to come alive when the screen is on not off. Check ALL APP and WIDGET SETTINGS FOR HOW OFTEN THEY UPDATE. I DO MEAN ALL. GO THROUGH EVERY APP AND CHECK THEIR SETTINGS ALSO the biggest drain is make sure you sign out gtalk or it will just constantly run. I shoulda posted my screen shot of battery life earlier sorry i will as soon as it reads 1d21h again. prolly tomorrow afternoon.... Rooted,cwm,galaxy rom and kernel, blue minimalism theme

jbadboy2007 said:
Yes do the airplane mode trick and turn off gps if you are not using it and DO NOT USE JUICE DEFENDER i get 45 hours battery life without it. that app runs constantly in the background and uses more battery. Juice defender is for lazy people that dont know how to find these data and sync settings that are already on the phone or you can download an app that will let you toggle whatever setting you need. Set emails to sync once an hour and if it is really a priority then go into the email account and push refresh.
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i do the airplane trick, problem is it seems,when im on wifi, the life is great, battery is perfect, as soon as you go to 3g, it goes to crap, plus the service where I work is spotty as well. I don't know what to do, seriously I can't go through 2 years of great cell service that I can't use because the battery is dead. I mean if I could get through 10 hours it wouldn't be bad, but as it is now, i'm lucky to squeak through about 8 hours. and I have the mixup kernal that is undervolted and supposedly already messing around with the cpu. usually on 3g, no matter where I am pretty much I"m at like 10-20% TWS.

tws is 50% for me. just stop the data with sync settings then it has no reason to draw more. my house and school have terrible service. you are only losing battery life due to data that is going really slow and it takes way more battery to accomplish. i keep wifi on all nite at my house but my sync settings are off. i do this so its not searching for 3g because i have an airrave and wifi. i used the di07 mixup and was not happy with it. galaxy roms have been the least buggy and very stable with the best battery life. That might be my opinion but also genius dog doesnt have an epic yet so i cant trust his stuff when he cant see the impacts with the kernels he is making. but he does know code i will tell you that.

robl45 said:
i do the airplane trick, problem is it seems,when im on wifi, the life is great, battery is perfect, as soon as you go to 3g, it goes to crap, plus the service where I work is spotty as well. I don't know what to do, seriously I can't go through 2 years of great cell service that I can't use because the battery is dead. I mean if I could get through 10 hours it wouldn't be bad, but as it is now, i'm lucky to squeak through about 8 hours. and I have the mixup kernal that is undervolted and supposedly already messing around with the cpu. usually on 3g, no matter where I am pretty much I"m at like 10-20% TWS.
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Holy crap 8 hour battery life is really bad.
Do you have any apps syncing? A weak signal with an app syncing can have a devastating effect on the battery life.
In my school building I get 0-1 signal bars and once I use the stock email app to sync my email every hour with 3G on my battery life is probably a third as good.

How?
jbadboy2007 said:
Yes do the airplane mode trick and turn off gps if you are not using it and DO NOT USE JUICE DEFENDER i get 45 hours battery life without it. that app runs constantly in the background and uses more battery. Juice defender is for lazy people that dont know how to find these data and sync settings that are already on the phone or you can download an app that will let you toggle whatever setting you need. Set emails to sync once an hour and if it is really a priority then go into the email account and push refresh.
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sent from my epic 4g with no 4g

only thing syncing is gmail, I refuse to stop syncing my email, otherwise whats the point of the phone? my blackberry could do push no problem, the iphone could do push no problem.
akei1 said:
Holy crap 8 hour battery life is really bad.
Do you have any apps syncing? A weak signal with an app syncing can have a devastating effect on the battery life.
In my school building I get 0-1 signal bars and once I use the stock email app to sync my email every hour with 3G on my battery life is probably a third as good.
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Click to collapse

robl45 said:
only thing syncing is gmail, I refuse to stop syncing my email, otherwise whats the point of the phone? my blackberry could do push no problem, the iphone could do push no problem.
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Click to collapse
Inside my building where I get a weak signal I turn off 3G and use the wifi to sync my apps regularly. I get a good wifi signal there.
If I can't get a good 3G signal in the building than there's not much I can do to my phone to make the 3G signal better (I think that's the cause for the battery drain).

i have to say, the juice defender rocks, totally solve my battery problem.

actually, i still dont understand how it works. days before, i keep.complaining the bad battery, it drops 15% after one night. i turned my wifi and 3g off, it didnt work. i opened a thread to complain about this, some friend advise me to use the juice defender which really help a lot. now it use only 3 to 4% for 8 hours standby, which is much much better than before. if u are also troubled by ur battery, give it a shot. it's free from the market.
my set: all enable except for the location.
Sent from my GT-I9100 using XDA App

What does it shut off? Seems like it has to be something important to work. I want my email in real-time; does it mess with that?

I installed this only a few hours ago. yet to see any significant change. By the looks of it, having it on the default setting will turn data off when your screen is off, but I still get e-mail notifications in my 1hr check intervals even when my phone is sleeping.

AmesCell said:
What does it shut off? Seems like it has to be something important to work. I want my email in real-time; does it mess with that?
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Click to collapse
The main feature is that it disables data most of the time (2g, 3G or wifi) and only enables it at preset intervals, like 2 minutes every 30 minutes to get your e-mails and stuff.
So basically what you lose is push / real time notifications.
It can also manage the screen brightness and CPU clock more precisely, put the phone in plane mode while you're sleeping (for example you can tell Juice defender to go in plane mode from 23:30 to 6:30 every day, except if you're still using your phone after 23:30 or start using it before 6:30), or activate wifi only when you're in a specific location.

Does anybody have issues receiving MMS picture messages with JD or any other power saving app running?
I had 'Green Power' running yesterday. A few people sent me pics which came through as blank. Stopped the app and asked them to resend and it worked.
Thanks
NC

I tried this app too, but the battery draining when WiFi was enabled was higher than without JuiceDefender. Still trying to get through all the JD settings...

I dont think Juice Defender would work well for me as I use Whats App a lot...

I use it on my ego. One of the best apps i bought
from my phone duh

Is anyone else able to toggle the 2G/3G setting? I've paid for the Ultimate Pack (wish i hadn't now as the Plus pack is supposed to do this) but apparently JD doesn't like my ROM, the Log says: 'ROM is not compatible with AOSP helper (3G control is unavailable) - get CyanogenMod
Out of interest i was on a UK O2 branded phone so i flashed XEU KW7, then rooted, then put back the original KE7 kernel. I wonder if that's the problem?

I was messing with Juice defender, but I found the app called Battery Booster to be much, much more effective. I went from a 12 hour battery, to having between 24 and 28 hours the last 3 charges. Simply amazing, more than doubled my battery life. Using perhaps 1-2% per hour when sleeping.

1-2% per hour when sleeping is not that good, i get 3% in 8 hours when sleeping.
But juice defender does what should be built into the gingerbread and that is, it puts your wifi and 3g to sleep when your screen is off or when you are not using it.
I personaly dont use push notifications so loosing that doesnt bother me, what bothers me is when the phone is in sleep it drains because i have wifi on.
I dont want to be turning wifi on and off all the time, i want it to be automatic, when i go on the web or open an app that uses data it should turn on my wifi.
SO YES JUICE DEFENDER DOES ROCK.

Well, before battery booster it used 5 - 8% per hour sleeping, so I'm pretty darn happy with the results I'm getting now. It used to last me about 12 hours. Now it lasts usually over 24 hours, which is great. That is included with 3-4 hours of screen-on time. Android OS also dropped by 20% after getting battery booster.

NIK516 said:
1-2% per hour when sleeping is not that good, i get 3% in 8 hours when sleeping.
But juice defender does what should be built into the gingerbread and that is, it puts your wifi and 3g to sleep when your screen is off or when you are not using it.
I personaly dont use push notifications so loosing that doesnt bother me, what bothers me is when the phone is in sleep it drains because i have wifi on.
I dont want to be turning wifi on and off all the time, i want it to be automatic, when i go on the web or open an app that uses data it should turn on my wifi.
SO YES JUICE DEFENDER DOES ROCK.
Click to expand...
Click to collapse
You do know there's a setting for turning of WiFi when screen is off, right?
Settings - WiFi - Advanced - Wifi Sleep Policy

rengift said:
actually, i still dont understand how it works. days before, i keep.complaining the bad battery, it drops 15% after one night. i turned my wifi and 3g off, it didnt work. i opened a thread to complain about this, some friend advise me to use the juice defender which really help a lot. now it use only 3 to 4% for 8 hours standby, which is much much better than before. if u are also troubled by ur battery, give it a shot. it's free from the market.
my set: all enable except for the location.
Sent from my GT-I9100 using XDA App
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Click to collapse
If u using juice defender ultimate will boost battery more

h
xiga said:
Out of interest i was on a UK O2 branded phone so i flashed XEU KW7, then rooted, then put back the original KE7 kernel. I wonder if that's the problem?
Unlikely but a factory reset often cures a problem .
jje
Click to expand...
Click to collapse

BoogWeed said:
I dont think Juice Defender would work well for me as I use Whats App a lot...
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no problem at all with push services.
the way juice def works is simple: it geolocalizes ur wifi router, and moving out the area of wifi, jd switches off wifi hardware until u come back home\office. it does the same with other hardware modules not in use.
wot doesnt work: ebuddy or other istant massaging apps while screen is off (I think it's unuseful to use jd with IM-draining batt-apps)

NIK516 said:
1-2% per hour when sleeping is not that good, i get 3% in 8 hours when sleeping.
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Hmm, am I doing something wrong leaving my phone charging overnight? Will that kill my battery?
When do you guys charge the phone if not overnight?

Ayers976 said:
Hmm, am I doing something wrong leaving my phone charging overnight? Will that kill my battery?
When do you guys charge the phone if not overnight?
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Click to collapse
24 hours in a day so i charge when it needs a charge 20% left or when i know i want extended use .
jje

I just installed Battery Booster. Juice Defender didn't do much for me but annoy me.
Now see how this app will hold itself.

Very similar to my finding with ATK (link below). Something happened in Gingerbread with how the OS handles cached apps... to the point where some cached apps stay active and keep your device awake!
http://forum.xda-developers.com/showpost.php?p=14108166&postcount=1

Turn off wifi or not

i want to know... is it better to turn off wifi when screen turns off or 3g consumes more battery than wifi.
i think 3g consumes more battery than wifi, i don't know why every one recommend to turn off wifi when screen turns off.
Additionally, the process of switching on/off wifi/3g will consume more battery...

Turn all data connections OFF when not using them.... this will save battery.
you can use wifi sleep policy, but if you are on GB you may experience Android OS drain...

turn off all data and set wifi sleep policy to never

azzledazzle said:
Turn all data connections OFF when not using them.... this will save battery.
you can use wifi sleep policy, but if you are on GB you may experience Android OS drain...
Click to expand...
Click to collapse
WIFI OFF when not using - most of its idle state consumes up to 10x juice as data connection at idle (15-50 mA / 5 min)
DATA CONNECTION can be ON <- at conected but idle state it is not using more juice then if that would be off (5 mA / 5 min)
as well as BT and GPS can be ON all the time

ofc itt will not be so low if youll have sync every minute or some live widgets

Get juice defender, set it up right, and you will see a big gain!
GTi9000 insanitycm010/insaneglitch

slaphead20 said:
Get juice defender, set it up right, and you will see a big gain!
Click to expand...
Click to collapse
there is no need for any juice or battery defenders
any task/proces killers/managers or any paid or free apps
that are said to make your battery life better longer better whatever
basicly stay away for wifi and remember when you play games, use gps or simply use the phone battery will go down.

$omator said:
WIFI OFF when not using - most of its idle state consumes up to 10x juice as data connection at idle (15-50 mA / 5 min)
DATA CONNECTION can be ON <- at conected but idle state it is not using more juice then if that would be off (5 mA / 5 min)
as well as BT and GPS can be ON all the time
Click to expand...
Click to collapse
How did you gather this data?
I want to do some testing

battery monitor widget gives you such data and many cfg options
that is data given by diff phone codes gathered in one place, presented in configurable graphs and more...
damn i sound like commercial =)
this 5mA in idle is due 5 background apps (all sort of monitors i run)
think with a clean system it could be 1-2mA -that means-> basicly no % loss when you are sleeping and phone is not used
now i have few % loss by night but i find that more then ok

In my opinion you have definetly turn off ur wifi if not in use. It'll drain your battery!
Sent from my GT-I9000 using XDA Premium App

$omator said:
battery monitor widget gives you such data and many cfg options
that is data given by diff phone codes gathered in one place, presented in configurable graphs and more...
damn i sound like commercial =)
this 5mA in idle is due 5 background apps (all sort of monitors i run)
think with a clean system it could be 1-2mA -that means-> basicly no % loss when you are sleeping and phone is not used
now i have few % loss by night but i find that more then ok
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Click to collapse
nice thanks^^

3G use more battery then WIFI does

jvp - idle - no

i leave always wifi off do not make sense to keep it on since it will be scanning the hole time for new network (which mean more battery wasted) .
Also when i leave my wifi on sometime the phone connect to some near network , which require some http identification , so the phone will be connected to wifi network but without internet , in this case email sync and other auto update stuff will not work until i get away .
SO here when needed and there is a wifi network available i just switch it on .

iget searching->connecting->disconect
on my MIUI galaxy, there is a fix for that?

Battery drain issue (no dock, just tablet.)

If i sleep the device overnight I lose about 10-15% battery. Wifi on, bluetooth off. my girlfriends ipad 2 only loses about 1-2% with the exact same settings. anyone know whats up? I don't own a dock.
stock 3.1, no root.

How about other options? How often do TF synchronize with Google (Gmail, maybe Google+ etc.) and other services.

Define "wifi on." What is the sleep policy for wifi?

Wifi policy is set to always on, which seems to be the same on the ipad. I have never turned on the ipad and had the wifi off, and it gets push notifications while asleep, which I want. And yes it is syncing to multiple services, but again ipad-esque settings.
Sent from my Transformer TF101 using Tapatalk

bobloadmire said:
Wifi policy is set to always on, which seems to be the same on the loads and goods, I have never turned on the thing and had the wifi off, and it gets push notifications while asleep, which I want. And yes it is syncing to multiple services, but again ipad-esque settings.
Sent from my Transformer TF101 using Tapatalk
Click to expand...
Click to collapse
My WiFi Policy is set to When Screen Turns off and I get notifications when tablet is off. Disable Syncing to Picasa, there's a bug with it and causes problems. Disable syncs for things you don't need.
Find a battery logging app and tell me whats the highest amt of battery usage per app?

Just checked, wifi is like 90% of the usage, so ill switch to screen off. Bet that fixes it.
Won't this affect apps like groove IP where it needs to be online to receive calls?
Sent from my Transformer TF101 using Tapatalk