I can report, after using the phone a few days, that I'm getting about 15-16 hours total with moderate usage throughout the day. This is with the screen brightness set around 30%, which is awesome inside and works well enough outside, mobile data connection on earlier in the day, and lots of Wifi usage in the evening. Phone calls, consistent texting, web browsing, checking email, listening to music, downloading apps, checking the weather are things I've been doing everyday. I have to say that I'm impressed with how well it has done, considering this power-guzzler of a screen, which I LOVE by the way. So hopefully that helps. I honestly don't mind charging every evening because the overall awesomeness of this phone makes up for only getting a day of usage out of it..