... convenient 2200mah External Battery Charger for mobile Specifications:Cylindrical Lithium-ion battery Capacity: 2200mAh Input voltage/current:5V/800mA Output voltage/current:5V/1000mAh DC charging time: 5 ... over-charged, over-discharged, excess-current, short circuit Compatible: Provided iPhone,ipad, Nokia, Micro USB, Mini USB 2200mah External Battery Charger for mobile