My mom bought a new phone Xperia E5. Setup, update software, but there was an insane battery drain. My mom keep telling me that her phone keep draining battery when not using the phone so i decided to take a look. I changed some settings for battery saving and disable bloatwares that she don't use, but still getting insane battery drain. I checked CPU spy and i see that there was no deep sleep.
I disabled 3 system apps, Email, Exchange, and Video & TV SideView, and it really solved the problem. Got deep sleep back and battery life is longer. Can someone confirm this?
Let me know if it solves your battery drain problem.