Let There Be Light This lightweight battery has a convenient flashlight built-in. So you can save even more of your phone battery by using GoPower instead. Press the button twice and light the way. Universal Power This powerful little battery not only power your phone, it can charge virtually any device that uses USB to charge. So plug in you digital camera, Kindle or fitness tracker and leave your house with confidence. You provide the cable, it provides the power. Power Management & Protection GoPower Pocket enables pass-through charging while connected to a power source. Your device charges first, then GoPower Pocket recharges itself. Pocket-Size Power This Power pack is so lightweight and small, you''ll want to take it with you wherever you go. It easily slips into your pocket or purse without weighing you down.