Until Friday, I was able to get up to 4 days worth of use out of my phone with a screen on time of about 2.5 hours. Standby hardly did anything to the battery, I was losing about 1% every 8 hours. On Saturday I did the ANG3 update (G900HXXU1ANG3) and since then my battery has been dropping several percent per hour. I have done multiple restarts, drained the battery completely and recharged and double checked that I haven't installed any other applications or made changes to the phone. Over the last 14 hours I have dropped from 100% to 68% with a screen on time of 47 seconds. GPS is off, location services are off, mobile data is off, screen rotation and gestures are off, etc. Only Wi-Fi is turned on (basically how I've used the phone since I got it at the beginning of August).
Any help would be appreciated
Just some more info - I am running an unrooted phone with stock Samsung firmware, I haven't and don't plan on flashing to anything else. Full info as follows, just in case:
Wed Jul 9 14:56:51 KST 2014
SE Status (what is this? I didn't see it on my S2):
Wed Jul 09 15:16:12 2014
Security software version:
MDF v1.0 Release 3
Is it possible to go back to ANG2 or earlier? I am quite confident flashing custom ROMs using recovery mode but I'm lost with stock. Is it recommended I try anything else before flashing to an older ROM?