... :over charged/discharged, temperature, and short circuit protectionMulti function:external power bank for Iphone, Ipod, Mobile phones, PDA, MP3, Camera and ... cords needed, portable size to carrying***********************Product Features:1, External power bank for Iphone, Ipod, Mobile phones, PDA, MP3, Camera and ... , Small, convenient, easy to use, high capacity.3, Use USB cable to charge Mobile Power