Compatible with most smartphones and tablets, the Goji G25PBBL16 Portable Power Bank is a compact and practical way to carry around some extra charge for your device.It's so slim, you can slip it into a pocket, so it won't take up too much room in a bag or laptop case.As soon as you connect your phone to the cable, its auto-on feature starts charging the device. Two smart charge indicators show how much power is left in the G25PBBL16 and its charging status.