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I have an huge battery drain issue on my OnePlus One running Android 4.4.2 on stock ROM CM11s O5Q with FrancoKernel R35. I googled and searched so many times but couldn't find anything and I am really desperated now. And hope you guys can help me out.

So, some time ago I noticed that my battery drains over night in "Deep Sleep" 2-8% per hour which is really unusual. I installed "BetterBatteryStats" to look up whats going on, noticing that strange wakelocks are draining my phones battery. Here are to wakelocks event0-875 and event2-875 (see screenshot, this screenshot was taken after charging so dont wonder the -0,5%) which iI dont know and I also dont know to what they belong to.

I read so far that event0 are androidOS stuff wakelocks and at the end of a day I have round about 30-40% left mainly drained buy AndroidOS, as I can see from the built-in Bettery Stats. We have to see that its a 3100mAh battery and i usually dont use my phone at all during the day.

I already greenified some apps to see if its an app which is causing the drain but no success so far.

Today in the evening I cant post you another screenshot from WakelockDetector app. The statistics resets after charging the phone.

I hope you guys can help me, thanks so far!

BetterBatteryStats
BetterBatteryStats (click image to enlarge)

  • does rebooting/restart the phonef fix it temperary? – totti Mar 6 '15 at 12:18
  • No I tried it several times inlcuding clearing cache and stuff at the end of a day the same result showed up – Debty Mar 6 '15 at 12:30
  • what if no internet access ( OS update )? – totti Mar 6 '15 at 12:56
  • I dont understand the question :) I am usually all day connected to WLAN. The phone turns WLAN of if not necessary and in sleep i guess – Debty Mar 6 '15 at 13:02
  • check 'data usage'. can you see 'android OS' in the list. – totti Mar 6 '15 at 13:59
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If you're rooted, try Greenify. It will hibernate all the unused apps and thereby releasing resources which sucks up your battery juice.

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