[Q] Huge battery drain without wakelocks
Since the beginning (over one year) I had huge battery issues with my I747. I searched a lot and always found only trivial answers: Too many wakelocks, bla bla bla. I read this so often that I started to believe that and lived with a drain of >4%+/h. Although I turned off everything (Wifi, GPS, Background Sync, no Facebook etc etc).
I did a factory reset multiple times, no change. Currently I have nothing installed on my phone except the bare minimum and use BetterBatteryStats (BBS). The result is terrifying, strange, makes me angry and desperate: A battery drain between 4% and over 10% per hour although the device is not used at all! All background services turned off, no calls, no switch on. After 4 hours I turned on the phone and BBS showed (and proofed) me: 99% Deep Sleep!!!!
The top side stays cool but the bottom side is always warm.
So, WTF? Remember, this is stock firmware, freshly factory resetted without much stuff on it. This is NOT one of those 99% trivial wakelock/software/facebook issues. Are there ANY known hardware bugs? Firmware bugs? Is it the radio? Battery? Could a different ROM/kernel help? Which?
Anyone experienced this?
Any, any, any idea what I can do about (except throwing it against the wall?).
(Unfortunately warranty ran out just a couple of weeks ago.)