mobile phone potable power charger: 1. DC input: 5V , 1000mA ... : 5V, 1000mA 3. built-in battery: 3.7V,2200mAh mobile phone potable power charger:It has unique circuit design, which ... improve the battery’s service efficiency.The connecter is standard USB design, inner there is 2200mAh Li-battery.Fashionable design, ... is less than 5V, e.g iPod, iPhone, PAD, mobile phone, digital camera, MP3, Mp4 and so on ...