my screen is set to auto brightness
all the extra features are turned off (gps, screen gesture, air view...etc.)
wifi is off
phone on power saving mode
turned off auto sync for all counts
I've done all that and my battery is draining even when I don't use the phone. 80% battery lasts me 4.5 hours. Battery runs out within 6 hours even if didn't use it- no web search, games.. etc. What do I do?