Not sure. Only time I had short battery life was the first day or two when I had everything turned on and was playing with the phone constantly. Ever since I got ride of ND and turned a few things off, its been fine. Though I did notice that today my battery life seemed unusually good. I used the phone today at work, had battery saver off all day and still had 80+% at the end of the day, then I've been on the phone with 4 different people tonight, about 2.5 hours total talk time, plus surfing this forum and reddit for the last hour and my battery is still at 48% and the phone hadn't seen a charger in 14 hours. I'd call that pretty damn good. I doubt my 900 would've even had 48% left after all that.