Keep your devices going for longer with the Goji G6PB6BK16 Portable Power Bank.The simple power bank charges via your device's USB cable, and is compatible with most smartphones and tablets.With a 6700 mAh capacity the power bank provides up to two charges of most smartphones and one charge for most tablets while its handy LED indicator will let you know when it is time to re-charge.Pre-charged right out of the box, the Goji G6PB6BK16 Portable Power Bank is a lightweight and compact power bank for those times you can't get to a power supply.