Connect the Phone to USB on PC and Format the DATA clean all folders, then go Recovery and do factory reset and wipe cache 3 times, then go download mode and flash the firmware 4.4.2 with odin 3.09.. and see if you got battery drains again.
Dunno if its the correct way but thats what i will do it to test :X
If you guys want to turn around your battery life, upgrade to kitkat. We can try to play hide and seek all day with what drains your battery, the fact is, i got better battery drain with GPS, Localization, Wifi, BT and NFC all on, on kit kat, then you guys have with all that shut off on Jelly Bean, and then upgrade to X-Note 9.0
P.S. Please explain how you were running 4.2 when the phone came stock with 4.3?
One of the best things about the modern day smartphone is its ability to save us … more
02 Sep 2014
By Will Verduzco
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?