From what I've noticed so far a few hours. Online says 3-5, and that seems to fit with my limited experience. The range is pretty good. I'd originally had it under my TV (which is on a piece of furniture that has a few shelves and a glass door), but I couldn't move much past my room without losing gamepad signal. After taking the Wii U out of there and putting it up a bit higher (and not inside anything) the gamepad can get a clear signal anywhere inside the house, so there are a bunch of games I can play anywhere in the house just on the gamepad, which is nice.