Originally Posted by Xyrax
Depends what you were doing during that screen time.
Best bet is to install BBS if you haven't already. Then plug the phone into your charger then unplug it and let it sit untouched for at least an hour (the longer the better). After you let it sit for that time, follow the instructions at the link below to generate and decipher a dump file. Be sure the dump file is "Since unplugged". The link below explains everything.
[APP] [30 Jul - V1.9.1] BetterBatteryStats adds battery history back to Android - xda-developers
The first step is to find out what background processes are waking your phone up. The more screen time that is shown, the harder it is to nail down the problems.
SO. Couldn't figure out BBS. Did a factory reset. didn't install anything. Disabled all bloatware in application manager. turned off mobile data, connected to wifi, turned sync/gps off. automatic brightness. did a few phone calls, texted casually. played no games. took a few photos. went into task manager about every hour to end all tasks.
13 hours after a full charge I'm down to 4%. Screen time = 1 hour 34 minutes.
What say you now?