Power when you need it. This black power bank features a 2,200 mAh internal Li-ion grade A battery that can fully charge an iPhone. An LED indicator lets you know how much charge is left. Includes a USB to micro USB connecting cable to recharge the power bank - it can also be used to charge up devices with a micro USB input. 5V/1A USB output. Measures 3/4" x 3/4" x 3 3/4". Laser-engraved logo.