We are offering lithium ion 2200mah portable power bank ideal for powering and charging ipod, iphone, mobile phones, mp3s and other portable devices compatible with the majority of mobile phones, mp3s, gps, game consoles and more usb connector powers and charges your digital devices allows you to top up power to your portable device while on the go reusable reserve power pack - no batteries required 2200mah high power built-in lithium-ion battery pack over current, over charge, over discharge, overheating and short circuit protection.