HTC One M7 :: 4.2.2 - Android System Uses 50 - 90% Of Battery

Jul 6, 2013

I've got a very big problem, since the last update im experiencing heavy battery drain and as i can see its becouse of the "android system" uses 50-90% of battery.Before the update this number was around 3-10%. I dont know what to do,my phone gets really hot and the battery percentage drops in minutes.

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What I have done:
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Xperia Z2 :: Android OS Battery Drain

Feb 27, 2015

So when I opened up my battery usage I noticed that Android OS was at 70% usage (69% now in screenshots).  I check my battery usage several times throughout the day and Android OS was not consuming 70%.  It seemed to spike to 70% consumption, which points to an error in battery usage charts.

The steeper drops at the beginning and toward the end can be attributed to the poor reception areas I was in and my heavier screen on time during those periods.  The flat portion in the middle is when I went to bed and left my phone for about 8 hours.  Notice there are no huge wake locks during my time off battery.

This is my current screen on time....

I'm guessing this is an error with the battery usage calculator but I'm not completely sure. How to know if this is an error with the battery usage or is Android OS really consuming 70% and how I should fix it?

Links to screenshots:
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after the recent update to ICS 4.0.4 my battery is draining even faster. Even when I am not using the phone, the battery is draining very fast, upon checking I see that Android OS used up atleaset 50% when on Idel and it has a Keep awake of over 9 hrs in a total period of 10 Hrs. I do not have any apps running. I just have Trillian on which is a chat app. It also has Push messaging. It reset my phone to factory defaults even today but same thing. I also do not have Wifi or Bluetooth on. Main question is what can I do to increase the battery life from 100% to 0 % in less than 12 hrs.

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I found that a clear cache can solve my issue. I did this and battery drain stopped. Yesterday night, I decided to make a full wipe/clear data, and clear cache. I reinstalled same apps that were on the mobile before, and disabled the same built-in apps. Phone was at 74% when I went to sleep. This morning, my phone was at 52%!!! So I uninstalled Adobe Reader, and activated all the apps that I disabled before, restarted into recovery and cleared cache. Now the issue disappeared again, but I wonder if this will not appear again when I charge my phone to 100%.

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