... input: 5V , 1000mA 2. DC output: 5V, 1000mA 3. built-in battery: 3.7V,2200mAh mobile phone potable power charger:It has unique circuit design ... , which can indicate the charging performance, also can improve the battery ... output is less than 5V, e.g iPod, iPhone, PAD, mobile phone, digital camera, MP3, Mp4 and so on ...