Do not worry about your devices losing juice while out doing errands with the compact back-up power bank charger. This mobile power bank is equipped with a 2200 mAh lithium polymer non-recycled battery that has an output of 5 volts/1 Ampere. This can charge most MP3 players, smartphones, and the like. This back-up charger has LED indicator lights. Plus, it sports a micro-USB input to charge it and a USB output you can connect to your devices. The power bank even includes a 39"-long white cable for you to charge on the go. All of these are housed in an ABS plastic casing that has a rubberized finish that is soft to touch.