I have one. I charge it every night or two. Sometimes it runs out of battery but I don't care much. Web browsing, emailing, calling for a rideshare, and other straightforward stuff is fine. If you're using Google Maps for turn by turn GPS continuously in a car without a way to charge your phone via USB, you'll run out of battery in a couple hours. If you play a bunch of graphically games, I imagine it wouldn't be super great.