Originally Posted by Tinderbox (UK)
So what measures have you done to locate the cause of your problem, do some research don't just ask for fixes, read all the battery problem threads, try the suggestion other people have suggested.
Well, I think you are right. It's not the android OS, but the apps that cause this problem. If there is any problem with Android 5.0, it's perhaps its inability to reign in the apps that keep that tablet awake most of the time. I have downloaded CPU spy and other wakelock detector, and they both showed that my tablet was not in deep sleep most of the time running either stock KitKat or Lollipop. To be honest, I never got to the issue of finding out which app was the problem, but what I did to fix this issue was to flash the latest clean Lollipop rom, and then keep the number of apps down to the must have minimum. And right now my tablet is spending about 2% of power a day while turned off. So if I have a three day break between going to gym, the place I use the tablet the most, I don't need to worry about recharging the tablet. After doing this I still noticed that Hangouts, the preinstalled system app causes the most wakelocks on my tablet. I looked around in its settings, logged out of my account, and disabled everything that looked like "update" or "sync" and that seems to have stopped that issue too.
So right now, I have zero issues with my stock rooted Lollipop.