You know, many devices that you Upgrade to Android 4.4.2
, they get battery Problems.
If you go to the battery screen, then you'll most-likely see, that the process Android OS
uses more battery charge than Ultra GPS•Logger Prô in action.
It's because the programmers of Android made 4.4.2 very Bogus.
See this for more Information.
So a Simple solution for all Android 4.4.2 or 4.4.3 - Devices:
Downgrade to Happy Jelly Bean
or upgrade to 4.4.4
- still better than 4.4.2. - and also fix for the battery problem
You're on XDA-Developers right now - so you'll most likely find a Guide how to do what (e.g. downgrading) for any possible device!)
Android 5.0 has a VERY HIGH battery stability
thanks to „Volta"
- but the other parts - who knows how many other disadvantages as known from Android 4.4.2 - do still exist?
Android 4.4.3 will fix the DataLoss-Bug.