Take a second to appreciate the beauty of this metallic blue power bank. Wow. Anyway, it has a 4400 mAh battery capacity and is capable of charging most smartphones and tablets (Sorry Nokia phone users, but your batteries last 4evr). To charge your device, simply connect the USB charging cable (comes included. Wow, wow!) to the power bank. How do you know it's working? It's lit. Includes a lithium-ion rechargeable battery and a micro USB charging cord. Some assembly required.