Develop Bugs

Battery life just terrible, need since help plz!!

As title says guys, I don't no why but my battery life is just really bad since I moved from stock 2.1 Rom to custom ROMs :-(
Is it my phone? I can't work pig wot it is. I checked the battery usage #*#*4636*#*#) and it seems the Android system is using A LOT of it. I tried charging with phone off, clearing battery stats, not overcharging, but just can't resolve this issue.
Also, I have sync set to update manually and have mobile internet off always, only on wen needed. Same with WiFi. Screen is on auto and time off screen lock set to 30 seconds
I am using OpenDesire sense Rom
Any help will be really appreciated.
Thanks
Sent from my HTC Desire using XDA App

I could feel WiFi siginal of 2.2 is much better that stock 2.1,
I suppose that the better performance will bring the fast battery drain,
if your custom ROM support WiFi N mode,
that really makes your battery life short that before.

I have the same problem and same settings as you. I read on other forum that people who updated to official 2.2 have even better battery life.
I cant even squeze 20 hours out of my battery :/

You guys should always post what ROMs you are using...

Opendesire 3.3, its the same with defrost.

i also had really bad battery life on those 2 roms
even doing nothing the phone would just keep dropping
go to official froyo 2.2
neophye roms for me have amazing battery life = 48 hrs..

Agree with cygnet
Sent from my HTC Desire using XDA App

Neophytes's battery life +1

I'm using OpenDesire sense Rom
Sent from my HTC Desire using XDA App

Is there another non sense rom? I really like stock better...

Check if the phone goes to sleep correctly. Spareparts > battery usage: other usage, since last unplugged.
I had the same problem, until I found out that the phone was not going to sleep. (running and screen on percentages were way off. Almost 100% running and a lot less for screen on.

update to the last radio

I found that after forcing everything to install to SD card my battery life plummeted. There were apps/widgets that should have stayed on the phone. Once I moved these back, battery life was back to normal.
I use Systempanel to see the battery drain graph and could see a pattern to it.

Same issue here, Will try Neophyte tonight
Using this rom http://forum.xda-developers.com/showthread.php?t=741663, and it's fantastic! However batt life on .08 and .20 radio is a shocker. I watched a 1 min trailer on youtube, in and out and I lost 4% battery. Before with OpenDesire I'd be shocked if the battery percentage even twitched slightly.

jamran said:
As title says guys, I don't no why but my battery life is just really bad since I moved from stock 2.1 Rom to custom ROMs :-(
Is it my phone? I can't work pig wot it is. I checked the battery usage #*#*4636*#*#) and it seems the Android system is using A LOT of it. I tried charging with phone off, clearing battery stats, not overcharging, but just can't resolve this issue.
Also, I have sync set to update manually and have mobile internet off always, only on wen needed. Same with WiFi. Screen is on auto and time off screen lock set to 30 seconds
I am using OpenDesire sense Rom
Any help will be really appreciated.
Thanks
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
I use Defrost 1.5a and I just use about 2% every hour when the phone is sleeping, and that's with auto sync and mobile data enabled. (disabled it's 1%/hour)
Always underclock to the lowest mhz when the screen is off using SetCPU and when you do use your phone make sure the brightness isn't too high.
I could make a whole list of tips, but I'm sure you'll find more than enough of those on the net.

djind said:
Check if the phone goes to sleep correctly. Spareparts > battery usage: other usage, since last unplugged.
I had the same problem, until I found out that the phone was not going to sleep. (running and screen on percentages were way off. Almost 100% running and a lot less for screen on.
Click to expand...
Click to collapse
I may be dumb but how do you force your phone to go into sleep once screen is turned off ?

nb8k said:
I found that after forcing everything to install to SD card my battery life plummeted. There were apps/widgets that should have stayed on the phone. Once I moved these back, battery life was back to normal.
I use Systempanel to see the battery drain graph and could see a pattern to it.
Click to expand...
Click to collapse
Which apps were they?
Sent from my HTC Desire using XDA App

djind said:
Check if the phone goes to sleep correctly. Spareparts > battery usage: other usage, since last unplugged.
I had the same problem, until I found out that the phone was not going to sleep. (running and screen on percentages were way off. Almost 100% running and a lot less for screen on.
Click to expand...
Click to collapse
How did u resolve this issue?
Sent from my HTC Desire using XDA App

Metalazzo said:
I may be dumb but how do you force your phone to go into sleep once screen is turned off ?
Click to expand...
Click to collapse
jamran said:
How did u resolve this issue?
Sent from my HTC Desire using XDA App
Click to expand...
Click to collapse
(using Cyanogenmod 6)
When your screen is off, your phone should automatically go to sleep. Sometimes widgets or apps keep this from happening (like the music player), making it use battery as if you are constantly working on it.
How I resolved this issue was to find out what app or widget caused this. I ended up starting from a fresh reset, installing first all apps I really use (calendar/message widgets, powerstrip etc.)
I tested by installing an app, rebooting (or sometimes not), check the running time of the phone, turning screen off, and check again in 5 minutes. The phone should go to sleep in about 30 - 40 seconds. I am telling you this, because most apps causing this are widgets/apps running constantly.
However, I found in spareparts also that 'settings' was taking alot of usage time in usage statistics. A simple reboot did the trick from here on. But I am guessing I had installed something which made some app not close properly..
Maybe it is better to have a task manager/killer for these situations.
Running and Screen On percentages should not have too much of a difference if your testing and not using the phone while screen is off (music, bg stuff)

You could try juicedefender, it helps improve battery life by disabling unneeded connections while the phone is not in use

Battery Calibration didn't change anything!!!

Running stable CM 6.1 with cm kernel & followed the steps of calibrating battery & my battery lifes still horrible, currently 1 hour after calibration and already down 2 70% from being on internet & a few texts
Sent from my HTC Vision using XDA App

bnoot said:
Running stable CM 6.1 with cm kernel & followed the steps of calibrating battery & my battery lifes still horrible, currently 1 hour after calibration and already down 2 70% from being on internet & a few texts
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
have u got spare parts? open it up and look at battery history and the running vs screen on time.
they should be the same but i can almost guarantee that your phone is still running whilst the screen is off. you need to find out the app which is keeping a wakelock on ur device and delete/change its settings

Ok thanx..will try this
Sent from my HTC Vision using XDA App

adam18488 said:
have u got spare parts? open it up and look at battery history and the running vs screen on time.
they should be the same but i can almost guarantee that your phone is still running whilst the screen is off. you need to find out the app which is keeping a wakelock on ur device and delete/change its settings
Click to expand...
Click to collapse
Sorry for the noobish question, but can I compare the two. I went to spare parts and could not see where to compare screen on time vs running.
I recently tried to calibrate y battery, but sinse my screen does not shut off on its own as before. I've aleady checked the screen timers and all is as it was before.
Right now I am @ 4.5 hrs since I unplugged and I am sitting @ 76%, with little use...kinda sucks!!!!
Sent from my HTC Vision using XDA App

Crey23 said:
Sorry for the noobish question, but can I compare the two. I went to spare parts and could not see where to compare screen on time vs running.
I recently tried to calibrate y battery, but sinse my screen does not shut off on its own as before. I've aleady checked the screen timers and all is as it was before.
Right now I am @ 4.5 hrs since I unplugged and I am sitting @ 76%, with little use...kinda sucks!!!!
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
Mines is pretty much the same way..only a few hours off charge n still draining like crazy
Sent from my HTC Vision using XDA App

bnoot said:
Running stable CM 6.1 with cm kernel & followed the steps of calibrating battery & my battery lifes still horrible, currently 1 hour after calibration and already down 2 70% from being on internet & a few texts
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
What kinds of widgets do you have running in the background and how often are they pulling data?
Also, how many days have you been on CM 6.1? I upgraded from RC3 and my battery life is much improved. The first two days it was eating a lot as it 'calibrated' itself but now I can easily make it through a full days use with about 40% to spare.
I adjusted my background widgets and how often they pulled data and this really helped my battery life. Also, a poor signal can have VERY ADVERSE affects on battery life. For example, I work in a prison where cell phone reception is awful. If I am at work for 3 hours and leave the phone in 3G mode, I can easily go through 30% battery while the phone tries to find a signal...

Any idea how long will it take the batt tocalibrate???? I did the recalibration process on thurday night, and my battery sucks now.
I'm sitting on 49% only 4 hours unplugged. Before I was getting somewhere around 55-60% at this time interval...
Any ideas?
Sent from my HTC Vision using XDA App

Crey23 said:
Any idea how long will it take the batt tocalibrate???? I did the recalibration process on thurday night, and my battery sucks now.
I'm sitting on 49% only 4 hours unplugged. Before I was getting somewhere around 55-60% at this time interval...
Any ideas?
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
bnoot said:
Running stable CM 6.1 with cm kernel & followed the steps of calibrating battery & my battery lifes still horrible, currently 1 hour after calibration and already down 2 70% from being on internet & a few texts
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
Alright boys try this. I got over 2 days worth of lifetime with this set up.
-Download SetCPU
Set your profile to 245/245 screen off with priority at 100%.
-Turn brightness to 0%
-Turn GPS off (Go to Settings->Location and Security-> turn off all that GPS crap
-Leave 3G off until you actually need it, then turn it back off after you're done with it
-Leave bluetooth off
-Don't have garbage widgets lying all over the place on 7 homescreens. I only have like 5 widgets spread out on 2 homescreens.
Are you guys running CM 6.1? Cause I am.
Did you guys overclock?
Thank me if it worked out for you =P

convolution said:
Alright boys try this. I got over 2 days worth of lifetime with this set up.
-Download SetCPU
Set your profile to 245/245 screen off with priority at 100%.
-Turn brightness to 0%
-Turn GPS off (Go to Settings->Location and Security-> turn off all that GPS crap
-Leave 3G off until you actually need it, then turn it back off after you're done with it
-Leave bluetooth off
-Don't have garbage widgets lying all over the place on 7 homescreens. I only have like 5 widgets spread out on 2 homescreens.
Are you guys running CM 6.1? Cause I am.
Did you guys overclock?
Thank me if it worked out for you =P
Click to expand...
Click to collapse
Convolution Thanks for the reply, but im more interested in getting a few more hours but with certain level of freedom. I am not all that interested in switching things on and off every time I need them, but I understand what you mean.
I'm looking to get 16 hours of moderate use...that should be plenty. I currently turn off wi-fi and gps since I seldom use gs, and wifi is governed by a profile manager, and it's on only at night.
but setting connection down to 2G, and killing all screen brightness renders the device (IMHO) useless. Also, SetCPU @245 100%, would really hinder the device.
I am running CM6.1 Stable and I am running OC'd @ 1497, but on "On Demand" profile, so to use only as needed.
I still have to try Pershoot's kernel, I think I will flash it tonight to see what happens.
I am also experiencing some oddity with my screen time-out feature...it's not working.....my screen refuses to turn off by itself, I have to lock the device physically for it to take effect....not sure what changed...but the regular parameters are set properly.

I'm getting 2-3 days with the stock WWE ROM that came with the phone. Brightness is set to Auto, but I keep GPS, BT, WiFi and mobile data connection off until I need them. Other than that, I talk about 20-40 mins/day, send out a few texts, listen to the radio, read my feeds and e-mail - pretty much everything the phone was made for.
IMHO, the "calibration" is bullcrap, it's just an impression that it lasts longer afterwards.

keinengel said:
I'm getting 2-3 days with the stock WWE ROM that came with the phone. Brightness is set to Auto, but I keep GPS, BT, WiFi and mobile data connection off until I need them. Other than that, I talk about 20-40 mins/day, send out a few texts, listen to the radio, read my feeds and e-mail - pretty much everything the phone was made for.
IMHO, the "calibration" is bullcrap, it's just an impression that it lasts longer afterwards.
Click to expand...
Click to collapse
Basically the same setup I have in terms of connectivity except for data.....does it really have that much impact on battery life?
What would I missing if I decide to turn data off?
Thanks!

Huge impact. Try it out for a day or two. Or just install Juice Defender, which disables it while the screen is off, turning it on at set intervals (like for 1 min every half hour) to let it sync.

Thanks Keinengel....I'll look up Juice Defender...sounds like the right thing!

i get atleast a day and a half out of my phone and i had it for about a week now. best battery ive had for a while now.

Wow guys...installed juice defender and pershoot's kernel, and only gone 1% in about 2.5 hour....I'll report again tomorrow
Sent from my HTC Vision using XDA App

Juice Defender

I'm installing this as a last resort before sending my phone back. After hard reset and everything, battery is still a major drain.
For those that are using it, how well does it work? Which settings are you using?
I've only the free version for now but would consider upgrading if it does help?
Also, how do you prevent meebo from disconnecting when the screen turns off? Is that an option on the free version?

rwc3b said:
I'm installing this as a last resort before sending my phone back. After hard reset and everything, battery is still a major drain.
For those that are using it, how well does it work? Which settings are you using?
I've only the free version for now but would consider upgrading if it does help?
Also, how do you prevent meebo from disconnecting when the screen turns off? Is that an option on the free version?
Click to expand...
Click to collapse
About Juice Defender, for me it worked with ~1.6x batterylife.
About Meebo: get Trillian, they made it for free this week. You stay connected even if your phone is off(for max of 1 day, changeable in settings) and you'll receive al the messages which came while your online the enxt time you login again. You can manage all your accounts on the PC with the regular Trillian program and then login on your phone with your Trillian account and all the accounts will be there. It is a real nice app with very low battery consumption.

The free version is very limited. I use the ultimate version and I'm rather happy with it. I don't want to schedule traffic when my phone is idle, but that would be a massive battery saver.
Yes, you can set different settings for each app in the paid versions. You can set a trigger that makes sure your internet is always on when meego is running, even when your screen is off.
But overall, I have no problem to use my phone for more than 12 hours on battery with moderate usage. Maybe you should send your device back anyway.

I had terrible battery drain as well but ive managed to resolve this. have you tried:
1. Deleting all social hub accounts?
2. Deleting your mail account if you use the stock mail app?
3. Updated to latest official firmware?
I was experiencing 10% idle drain per hour. Now i'm at 1-2%. Battery life is a huge improvement compared to my old desire. Dont guve up on this phone.
Sent from my GT-I9100 using XDA App

In my experience standard battery drain per hour should be
1~2% screen off / data off
3~5% screen off / data on
12~15% screen on / data off
18~20% screen on / data on
WiFi uses less battery than 3g but as you can see display is main problem...
Sent from my GT-I9100 using XDA Premium App

TriNeo said:
I had terrible battery drain as well but ive managed to resolve this. have you tried:
1. Deleting all social hub accounts?
2. Deleting your mail account if you use the stock mail app?
3. Updated to latest official firmware?
I was experiencing 10% idle drain per hour. Now i'm at 1-2%. Battery life is a huge improvement compared to my old desire. Dont guve up on this phone.
Sent from my GT-I9100 using XDA App
Click to expand...
Click to collapse
1. I froze all Samsung-related apps and accounts with Titanium Pro
2. I'm using the Gmail stock app. Is that bad?
3. I updated to KE2 and hard reset twice
4. I also froze the wifi apps
when my phone is idle overnight - screen off and not in 'awake', it dropped from 100%-56% in 7.5 hours. i posted a screenshot in another thread.
http://forum.xda-developers.com/showpost.php?p=13875879&postcount=684

rwc3b said:
when my phone is idle overnight - screen off and not in 'awake', it dropped from 100%-56% in 7.5 hours. i posted a screenshot in another thread.
http://forum.xda-developers.com/showpost.php?p=13875879&postcount=684
Click to expand...
Click to collapse
Sounds like you need to clear your battery history, leave it over night, then check what's been using it overnight to me.
I have 5-10% drop at most overnight (7 hours or so).

Uvaavu said:
Sounds like you need to clear your battery history, leave it over night, then check what's been using it overnight to me.
I have 5-10% drop at most overnight (7 hours or so).
Click to expand...
Click to collapse
thanks. how would i clear battery history? is that under setting -> applications -> running ?

Also try clearing data on the software update app. That appeared to work for some people. U definitely have a rogue app eating your battery... Can you give us a list of your running processes immediately after you restart?
Sent from my GT-I9100 using XDA App

So after using Juice defender ultimate for a couple weeks now, with the customizable apps configuration, I see no improvement in battery life.
I lost 50% charge overnight with just push email on (stock gmail app), only synching email and contacts.
For those with this app, what configurations are you using to improve the battery?
Sent from my GT-I9100 using XDA Premium App

I have it setup to turn the data, and wifi off while the screen is off.
Night mode is enabled, from 11:30, to 7:00am
I also have it only allow wifi via location, work or home.
It eats 1-2% while in standby per hour.
and about 3-4% overnight.

i tried juice defender ultimate and it made no difference. I deleted it just because its another app working in the background...

I found it to be very effective when set up correctly. Lose less than 1% an hour at idle.
Sent from my GT-I9100 using Tapatalk

mark2222 said:
I found it to be very effective when set up correctly. Lose less than 1% an hour at idle.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
how did you set it up?
Sent from my GT-I9100 using XDA Premium App

mark2222 said:
I found it to be very effective when set up correctly. Lose less than 1% an hour at idle.
Sent from my GT-I9100 using Tapatalk
Click to expand...
Click to collapse
Mine does that (1-2% per hour at idle) without Juicedefender and push email/facebook active. The problem with JD is also that when set to switch off Wifi and data in the background when the phone is idle, it doesn't always switch them back on after the phone awakens, resulting in many pain in the ass moments.
I bought it 6 months ago and never use it any more.

Richdog said:
The problem with JD is also that when set to switch off Wifi and data in the background when the phone is idle, it doesn't always switch them back on after the phone awakens, resulting in many pain in the ass moments.
Click to expand...
Click to collapse
I use Green Power for that... simply awesome... light and stable.
Sent from my Galaxy SII
If you find this post usefull please press the "Thanks" button

Vairn said:
I have it setup to turn the data, and wifi off while the screen is off.
Night mode is enabled, from 11:30, to 7:00am
I also have it only allow wifi via location, work or home.
It eats 1-2% while in standby per hour.
and about 3-4% overnight.
Click to expand...
Click to collapse
hmm some people talks good, some bad about JD.
I paid for Ultimate version, and must say its brilliant!!
Over night 1-2% /6H
Standby 1-3% /Hour
with screenfilter i get 6 1/2 Hours with display on and UMTS today
from 78% drop to 10% and from 10% to 5% in 5Hours again.
Iam suprised with JD, very well

rwc3b said:
how did you set it up?
Sent from my GT-I9100 using XDA Premium App
Click to expand...
Click to collapse
Pretty standard really wifi and mobile data enabled (ultimate version), autosync on ping, 15 minute scheduled check for 30s. I don't have it turn off data at night because the phone is usually plugged in and have data enabled when the screen is on. It also manages the wifi locations so usually it only connects to wifi.

nightranger73 said:
I use Green Power for that... simply awesome... light and stable.
Sent from my Galaxy SII
If you find this post usefull please press the "Thanks" button
Click to expand...
Click to collapse
Hmm I'd never heard of that app, but did a bit of research and it looks like it really does wake the connections well with the latest release... will give it a try!

I lost 4%/idle for 12 hours.

Removing Bloatware aka "what can I do to get better battery life?"

So I think by now everyone has realized the battery life on our A100's is mediocre. I've actually been pretty content with the usage I get out of mine. What I'm not so thrilled about though is the idle usage. I'll leave for work in the morning with my A100 at / above 90% battery and come home after 6pm with it completely dead. I have wifi set to turn off when the screen does, any app I have that has a sync option is set to 6+ hours, and I've stopped using live wallpapers. Every other electronic device I have can usually last a full day when not in use(my old netbook gets 3 hours of use on battery but 2 days while sleeping).
I've started looking into the "bloat" / OEM apps installed by Acer. Nidus, sync, socialjogger etc... My main questions are; what can be removed, what can I live without or would be better of with a 3rd party app, and which Acer apps can possibly be causing the idle/sleep battery drain? This thing should still last a full day while sleeping, shouldn't it?
Any suggestions? Anyone else have this issue? Thanks!

You could try using Bloat Freezer to freeze apps. I have alot of the acer stuff frozen, and with it in standby, easily goes a day. Things like socialjogger, acer init, etc.

These are the apps I've completely removed from system apps, made a backup of course..
AcerClockwidget.apk&odex
Agendawidget.apk&odex
Aupeo.apk
Clearfi.apk
DTG.apk
LinkToFacebook.apk&odex
MusicA.apk&odex
MyLocationWidget.apk&odex
NemoPlayer.apk
Planner.apk
SocialJogger.apk
Solitaire.apk
Xt9.apk
You can also remove appinapp butyou will loose the games multimedia app I use that so kept it.
Battery life hasn't been that bad on mine. I expected worse, I just picked mine up last week and after reading reading reviews I expected worse.
Sent from my ADR6400L using XDA App

allthrottle said:
So I think by now everyone has realized the battery life on our A100's is mediocre. I've actually been pretty content with the usage I get out of mine. What I'm not so thrilled about though is the idle usage. I'll leave for work in the morning with my A100 at / above 90% battery and come home after 6pm with it completely dead. I have wifi set to turn off when the screen does, any app I have that has a sync option is set to 6+ hours, and I've stopped using live wallpapers. Every other electronic device I have can usually last a full day when not in use(my old netbook gets 3 hours of use on battery but 2 days while sleeping).
I've started looking into the "bloat" / OEM apps installed by Acer. Nidus, sync, socialjogger etc... My main questions are; what can be removed, what can I live without or would be better of with a 3rd party app, and which Acer apps can possibly be causing the idle/sleep battery drain? This thing should still last a full day while sleeping, shouldn't it?
Any suggestions? Anyone else have this issue? Thanks!
Click to expand...
Click to collapse
WOW! I can use mine all off and on all day and don't have a problem. There has got to be an app that you are using that is destroying your battery when idle. If I don't use my tablet all day, it will last 2 full days (with wifi kept on).

That's what I was thinking. I get a decent amount of usage from it; it's when I'm not using it is when I feel like it drains the most.
I started freezing apps last night and let it charge overnight. I've still got to go through my apps and remove a few I don't use, and check to make sure they're not syncing too often. Do you all leave your gps and wifi on all of the time or have them shut off while the tablet sleeps?
[email protected] said:
WOW! I can use mine all off and on all day and don't have a problem. There has got to be an app that you are using that is destroying your battery when idle. If I don't use my tablet all day, it will last 2 full days (with wifi kept on).
Click to expand...
Click to collapse
Sent from my LG-P999 using xda premium

My settings are to never turn WiFi off and I always leave sync on; I like getting notifications and app updates. I have a weather app that updates every hour and Pulse news that updates every 4 hours.
I also always leave my GPS on, but there aren't many apps that use it while it is not in focus, so I rarely ever see GPS pop up on my battery usage list.
I do not use a live wallpaper.
I found that with wifi on, my tablet drains about 1.5% per hour when idle.

allthrottle said:
So I think by now everyone has realized the battery life on our A100's is mediocre. I've actually been pretty content with the usage I get out of mine. What I'm not so thrilled about though is the idle usage. I'll leave for work in the morning with my A100 at / above 90% battery and come home after 6pm with it completely dead. I have wifi set to turn off when the screen does, any app I have that has a sync option is set to 6+ hours, and I've stopped using live wallpapers. Every other electronic device I have can usually last a full day when not in use(my old netbook gets 3 hours of use on battery but 2 days while sleeping).
I've started looking into the "bloat" / OEM apps installed by Acer. Nidus, sync, socialjogger etc... My main questions are; what can be removed, what can I live without or would be better of with a 3rd party app, and which Acer apps can possibly be causing the idle/sleep battery drain? This thing should still last a full day while sleeping, shouldn't it?
Any suggestions? Anyone else have this issue? Thanks!
Click to expand...
Click to collapse
I suggest other than setting wifi to turn off when screen is off is to use a wifi toggle widget. You really never know what happens when the screen is off if your wifi is really turning off. Wish it was built in to the quick launch though like some Honeycomb tablet.

You can also use setcpu to setup profiles so that when the screen is off the processor stays at a slower speed rather than jumping into high gear when something wakes it up to sync. I've been able to go days without having to recharge (but I only use it for reading books, listening to the music I have on google music and play order and chaos every once in a while). I havn't touched my a100 in about 4 days and its sitting at 62% battery power.
Sent from my MB860 using XDA App

here is my usage, I never turn off wifi no profiles

I don't necessarily think you need to remove any of the stock app. My wifi is set to turn off when screen is off, GPS off unless I need it (apps like facebook will use it when you open it since it tries to get your location for checking in even if you're not checking in). Gmail is left at default but other mail is set to never (I just manually sync it when I open it).
If you wanna go a step further, you can install a wifi on/off widget to completely turn it off just incase an app is trying to use wifi.
With my setting my battery drains about 1-1.5% an hour when screen is off. IMO the screen is what uses the most battery. However though after conditioning the battery for 3 cycles it's been lasting longer.

I was just about ready to return / exchange my a100 so I did a factory reset on it. Lost track of time and forgot to, so I just decided to boot it back up and play with it. Left it alone at around 70% yesterday afternoon, came back home at 7pm today and to my surprise it was at 40% battery remaining. Must've been an app or setting I had that was killing it.
Probably end up hanging onto this awhile longer. Great tablet for the money!
Sent from my A100 using xda premium

thats more like it glad you got it back to normal.

Guys i want the slimmest acer iconia rom possible please update the list? I just dont use much stock apps at all.

jay_993 said:
Guys i want the slimmest acer iconia rom possible please update the list? I just dont use much stock apps at all.
Click to expand...
Click to collapse
Also can freezing apps brick your tab as well? Or does it defrost itself after boot?

jay_993 said:
Also can freezing apps brick your tab as well? Or does it defrost itself after boot?
Click to expand...
Click to collapse
I think with the 1gb ram on our device there shouldnt be a need to freeze any app and it doesnt defrost itself on reboot. Atleast it shouldnt.
Also I found for the most part if an app can be deleted it will let you delete it by dragging the app icon in the upper right in the app drawer. This is probably the safest way to delete rather than doing it in root explorer or TU.
This might be a dumb question but is it possible you have wifi issue that i've had on 2 a100s which will prob cause it to use more battery as its trying to work harder locking on.

It seems for the moment my battery issue was resolved with a factory reset. I have nearly the same apps on it now as before and my a100 hasn't been dying overnight. Don't believe I've frozen anything this time around either.
I don't think ram has a whole lot to do with it. I just figured some of these apps were starting themselves or syncing often, causing the battery drain.
Sent from my LG-P999 using xda premium

allthrottle said:
It seems for the moment my battery issue was resolved with a factory reset. I have nearly the same apps on it now as before and my a100 hasn't been dying overnight. Don't believe I've frozen anything this time around either.
I don't think ram has a whole lot to do with it. I just figured some of these apps were starting themselves or syncing often, causing the battery drain.
Sent from my LG-P999 using xda premium
Click to expand...
Click to collapse
Do you have a lot of widgets that requires syncing like youtube, twitter, weather, facebook? Those are the apps you probably what to check. OR you can just turn off wifi if youre not surfing or streaming.

Here's mine with wifi turned off. It was at 89 but I had to turn on wifi so I can find a screen capture app in the market. I have lots of apps including facebook, twitter, weather widget, which cant sync cause the wifi is off. Have not removed any stock app. I know this doesn't really answer what you asked but I'm just thinking something else might be wrong other than apps. Maybe its your battery not holding correct charge. Have you tried calibrating the battery?

I tried calibrating the battery the first time around. This time (after the reset) I haven't done anything special and have so far been getting 2 days of idle/light use before needing a charge. Satisfied so far. I was mainly concerned that I wouldn't be able to go on a trip without it needing a charge while sitting in my bag for a day without use.
Sent from my LG-P999 using xda premium

Upgraded to Jellybean heavy battery drain help!!!

Hi i upgraded yesterday to Jellybean but it seems am having a heavy battery drain..any one experiencing this problem? Any solution on this? Thank you in advance.
Sent from my SAMSUNG-SGH-I747 using xda premium

Mangtas_666 said:
Hi i upgraded yesterday to Jellybean but it seems am having a heavy battery drain..any one experiencing this problem? Any solution on this? Thank you in advance.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
The OS isn't always the reason for battery drain, many factors take into play.
How often you use the device.
Applications like widgets, email push.
Wi-Fi. If your not on it shut it down it else is always going to try to find a signal and drain battery.
Bluetooth. same with this.
Using the net.
Things like Google now, it's always running and trying to update info, shut it off of make intervals longer.
These are just some things to take into account, but at all use the phone different, and im not saying the OS doesn't drain but it solely isn't the only reason.
Hope this help.
Sent from my SGH-I747 using Tapatalk 2

I seem to be having the same problem. ..

Same here. With sync turned off, google now turned off, and most everything else that eats battery...
In the battery setting is shows that media is eating at least 25% battery.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

I'm having the same issue. I read that the media drain could be caused by bad media files, but I didn't have any issues before this weird.

In my experience when you first update to a new samsung rom, the media using the battery is your phone updating the picasa albums...which stinks because it also eats your data like crazy if you are not on wifi and forget to turn off sync until wifi is available.

I've noticed faster than normal battery drain as well on my device. Normally by 4:30pm I'd be at 40-50%. Now I'm in the 20-30% range.
I'm going to try factory defaulting it soon and run it for a day or two. OR I might not even do that and just go directly to Task's AOKP or CM10.

Tony_YYZ said:
I've noticed faster than normal battery drain as well on my device. Normally by 4:30pm I'd be at 40-50%. Now I'm in the 20-30% range.
I'm going to try factory defaulting it soon and run it for a day or two. OR I might not even do that and just go directly to Task's AOKP or CM10.
Click to expand...
Click to collapse
I am going to flash to tasks tonight, not fond of what I've been reading about cm10.
But guys remember we all use our phones differently, take into account apps, usage, ect
Some days my battery lasts a bit longer than normal but I want using it as much.
Sent from my SGH-I747 using Tapatalk 2

i dont have any issues with battery drain, but i would suggest a full restore after upgrade. dont restore using titanium, just install through playstore. then report back but i doubt it will be an issue

Before everyone jumps ship, may want to try a new kernel. KT and a few others should work on the new release. Just make sure you choose one that works on JB TW and not ASOP.

pinoymutt said:
Before everyone jumps ship, may want to try a new kernel. KT and a few others should work on the new release. Just make sure you choose one that works on JB TW and not ASOP.
Click to expand...
Click to collapse
I'm currently a kt kernel for jb twz.. but I'm not really complaining about my bat as I use my phone like a cheap hooker lol
Sent from my SGH-I747 using Tapatalk 2

I have the same problem.. After JB update there is huge battery drain. With average usage it drains almost 100%. Before update with heavy usage I was going through the day.
Maybe I should try KT kernel I don't know. I wiped all after updated, nothing saved from ICS.

CheateR92 said:
I have the same problem.. After JB update there is huge battery drain. With average usage it drains almost 100%. Before update with heavy usage I was going through the day.
Maybe I should try KT kernel I don't know. I wiped all after updated, nothing saved from ICS.
Click to expand...
Click to collapse
Try kt kernel and change the governors to suit your usage
Sent from my SGH-I747 using Tapatalk 2

Same here,
It's seem the culprit is the android.process.media.
Each time i bootup,android.process.media is running for about 30 min, non-stop.
I already do a factory reset+sd formatting, but no succes.
With startup manager, i can block that process,but you need to be rooted .

I use the same settings as before i did'nt upgrade yet..i got it fully charge with no texting and calls the next 1hr its already 80%..i think i would try to cycle first my battery for 2 more days..then i'll see if it still have heavy drains..thanks for the response guyss.

Check out my overnight drian! from 1:30 to 10 the average drain is around 4% an hour, Losing about 20% overnight doing nothing.

Captainjman2 said:
Check out my overnight drian! from 1:30 to 10 the average drain is around 4% an hour, Losing about 20% overnight doing nothing.
Click to expand...
Click to collapse
I just got this phone the other day and immediately updated to jelly bean.Though I have nothing to compare it to my battery drain seems normal. I'm losing about 5% an hour but that is with some use (it's new so I'm playing with it a lot).
I did notice more drain the first day of use (may have been because I was using it a lot) and noticed maps was taking up quite a bit of the battery and I wasn't using it. So I uninstalled the updates for Maps and then re installed it. Battery drain seemed much better after that and now the maps app doesn't even show up in the battery report(before it was about 3rd and it seems kinda high on yours as well though you may be using it).

i'm noticing about the same battery consumption as the stock ICS rom. about 1~2% per hour when idle and sitting, 2~5% per hour listening to music over bluetooth with the screen off, and 5~10% per hour surfing the net and watching videos and stuff.

Well after doing probably 5 resets on my phone , it seems like everything is working fine . I was having issues with the battery drain ,internet not connecting, and phone calls taking 2 minutes to connect.

I was having issues with high battery usage as well after updating to JB.
I froze most every app and widget associated with AT&T and Samsung (with the exception of AllShare) and flashed KT747 kernel and set governor to ktoonservative (default settings).
I am really never a heavy user during the day, but with the same usage I had on ICS, I average 15.5 hours (with the phone at approx 15% when I shut it off to charge) - screen on time between 2.5 and 3 hours; call time between 45 min and 1.5 hrs; media (which seems to be a big battery hog) only about 6 minutes. I use bluetooth exclusively, so that radio is on all the time the phone is on. I keep sync and background data on, but only turn mobile data on as needed.