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Old March 19th, 2012, 11:48 AM   #1 (permalink)
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Default How to find whats eating battery?

I am rooted and unlocked, but all stock. I would consider myself a light user, as I am usually at home or work, both with wifi. I am in a 3g area only with good signal, except at home but I do have a network extender there. Even in 4g areas I got much better battery life than I am right now.

I have been consistently getting over 48 hours per battery with light use. This is one the vzw extended battery. For the past two weeks my battery life has been poor with the Android OS chewing up 50-80% of my battery. I attached a screen shot from yesterday where I probably didnt use my phone for more than 10 minutes total. How to I find whats causing it?

I have tried deleting all apps I am not using, signing out of google+ and google talk, and I dont use facebook.

Any ideas would be appreciated.
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Old March 19th, 2012, 01:06 PM   #2 (permalink)
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I am rooted and unlocked, but all stock. I would consider myself a light user, as I am usually at home or work, both with wifi. I am in a 3g area only with good signal, except at home but I do have a network extender there. Even in 4g areas I got much better battery life than I am right now.

I have been consistently getting over 48 hours per battery with light use. This is one the vzw extended battery. For the past two weeks my battery life has been poor with the Android OS chewing up 50-80% of my battery. I attached a screen shot from yesterday where I probably didnt use my phone for more than 10 minutes total. How to I find whats causing it?

I have tried deleting all apps I am not using, signing out of google+ and google talk, and I dont use facebook.

Any ideas would be appreciated.
First things first, how in the world are you getting over 48 hours per battery charge? I never get over 12-15. I'm on wifi almost 100% of the time, use Juice Defender. I have been on battery for about 7 hours today and only have 26% left.
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Old March 19th, 2012, 01:22 PM   #3 (permalink)
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First things first, how in the world are you getting over 48 hours per battery charge? I never get over 12-15. I'm on wifi almost 100% of the time, use Juice Defender. I have been on battery for about 7 hours today and only have 26% left.
like he said....he is a lite user not in a 4g area. 10 minutes of screen on time in a day is like NEVER using your phone.

OP, there are a few things you can check into.
first things first...i would do a reboot.
next, click on android OS and see what the CPU total to awake time is.
also check out better battery stats. i haven't used it but some people swear by it. it takes your current battery usage stats and put them on steroids and gives you TONS of options and readings so you can pinpoint you problem.
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Old March 19th, 2012, 01:59 PM   #4 (permalink)
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This particular battery screenshot is well below average use for me, I really didnt use it at all yesterday. Before I was losing 10-15% overnight, but in the last two weeks its been 30-45% overnight.
The cpu total is 10hr 28min and keep awake time 17hr 4min. So something is using it, just have to figure out what. I have been extremely satisfied with my battery life up until the last two weeks. I will check out better battery stats and see what I come up with.
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Old March 19th, 2012, 02:49 PM   #5 (permalink)
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Do us a favor and report back if you find anything? I have much less impressive battery stats than you, but also noticed that over the last two weeks mine has taken a dive.
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Old March 19th, 2012, 08:13 PM   #6 (permalink)
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You need to use better battery stats to identify it. I have a writeup on how to do it in my signature. Its $3 from the market but I think you can find it for free on XDA forums.

My guess is google backup. I had it get stuck in an 11 hour backup that drained my battery. It could also be any of the other sync's on the phone that got hung up. I recommend only syncing what is necessary. Contacts, calendar, and gmail. I choose to sync my browser bookmarks as well but its obviously not critical. I also check my work email via pop3 every half hour. There's more info in the link in my signature.
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Old March 23rd, 2012, 01:36 PM   #7 (permalink)
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I have had my phone rapidly drain to 0% with no use over a 7 hour period, twice. sometimes the phone just gets stuck doing something that eats the battery. The first thing to try is a reboot.
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Old March 23rd, 2012, 11:56 PM   #8 (permalink)
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You need to use better battery stats to identify it. I have a writeup on how to do it in my signature. Its $3 from the market but I think you can find it for free on XDA forums.
Legitimately or no?
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Old March 24th, 2012, 12:13 AM   #9 (permalink)
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Legitimately or no?
Legit. From the developer of the app.
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Old March 24th, 2012, 10:45 AM   #10 (permalink)
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Legit. From the developer of the app.
Ok, awesome. I wanted to try it, but the price is just a bit high now that I have my battery issues handled.
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Old March 24th, 2012, 11:20 AM   #11 (permalink)
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A lot of devs post apk's of their apps on XDA. Any member of XDA can download it.
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Old March 25th, 2012, 03:27 PM   #12 (permalink)
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What helps my idle time is force closing camera app.
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Old March 31st, 2012, 10:52 AM   #13 (permalink)
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I had done multiple battery pulls and full discharges then full charges trying to make sure nothing was stuck running.

I downloaded better battery stats, but really couldn't identify anything that was causing my high os usage.

For some reason in the last couple days it has reverted back to the way it was before, with no changes by me.

Screenshot attached. 31% remaining and just over 48 hours of life. (granted this is with two overnight idle times)
Screen on time 43 minutes
voice calls 36 minutes
probably 15 or so text messages
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Old March 31st, 2012, 12:05 PM   #14 (permalink)
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Sounds like something was hung up.... probably a sync or google backup.
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Old March 31st, 2012, 02:40 PM   #15 (permalink)
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Sounds like something was hung up.... probably a sync or google backup.
But for two weeks??
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Old March 31st, 2012, 04:35 PM   #16 (permalink)
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After any reboot, try opening and closing the camera app and toggling bluetooth on and off. I remember those two things improving my idle battery life back when I first got the phone and the battery drain was driving me insane
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Old April 1st, 2012, 04:58 AM   #17 (permalink)
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On better battery stats, does anyone know what 'kworker' is referring to? It always makes up the majority of my results...
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Old April 1st, 2012, 07:37 AM   #18 (permalink)
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On better battery stats, does anyone know what 'kworker' is referring to? It always makes up the majority of my results...
kworker is normal for processes. Don't worry about processes so much. You need to see what's triggering your processor when your phone is not in use. Check 'partial wakelocks' instead. You are looking for partial wakelocks that are at the top of the list with a lot of minutes running.
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