Battery is certainly not in the 9 Lives CATegory. Mostly, I just use basic functions (personal email, texts, news and various lists Wunderlist, Evernote and Shopping List). I don't take or watch videos, and not many stills. My battery gets probably 4.5 to 5 hrs SOT. That said, it charges so quickly in 20 - 30 minutes that I don't mind plugging in for a while at work or home. I can get through most days without a boost, but prefer to always have something in the tank.