I did this yesterday and my battery life seems to have nearly doubled. Under 4.2 I was using, on average, about 5-6% battery per hour. It was about the same under 4.3. Most days I would just about make it through without a second charge whereas now, at 19.00pm, I still have 70% battery left. This equates to 3% per hour. I can tell the phone is using less battery because it's cold when I pick it up now. Looks really promising. Big thanks.When I first updated to 4.3 on Monday. My battery did drain fast. So I backed up my phone with HTC backup. Then I did a factory reset. Then I did a restore with HTC back up.
I pulled my phone off the charger about 7:45 this morning. With light use and a 20 minute phone call my battery still looks full at 5pm. Right now.
Wow!
battery life is awesome for me so far. Much better than when I was on android 4.1.2. I would suggest backing up you htc one and doing a factory reset.
Sent from my HTC One using Tapatalk
I also have had the same battery drain issue after updating to 4.3. I went into my settings, power, usage........and it seems the problem is that the android system itself is using 89% of the battery power wheras everything else is using 1%. I have talked to others that have android but earlier versions and theirs only shows 6% being used by the android system. I have read many blogs and tried everything but nothing works. I contacted att and they transfered me to android support who knew nothing of the issue, big suprise there, they said to try a factory reset and thats all thry could say. Of course that will fix the issue bc your going back to an earlier version of software, but what happens when you are forced to update again?? Seriously frustrated!!!
The 100% to 93% is not a drain issue. It's a calibration issue.
I've seen it happen after 4.3 and my conclusion is that the phone is not really charged to 100% despite the green light and the 100% indicator.
I base this on my experience, as if I leave the phone charging for another hour for example after it supposedly reaches 100% then I don't see it going to 93% in a matter of minutes.
There are some tricks that I haven't tried. People say that you should delete a small file called batterystats or something and then charge to 100% let it go to 0% and it will be OK. I haven't tested it, so I can't comment. If anyone has done it, please do tell.
But I'm almost positive that the issue is because of the change between fast charge that happened and is purely a calibration problem.
I'm getting mine replced because of a similar issue. My One has a weird drainage around 10%. It'll last about 2 minutes until it suddenly drops down to 3%. Once at 3% it gives me about 20 seconds until it dies out...
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