SHENZHEN VICTPOWER TECHNOLOGY CO.,LTD. KING-TRONICS INTERNATIONAL ELECTRONICS CO.,LTD.(HK) back up battery for mobile phone 1)Product Description Type:king-1900D Capacity:1900mah type:polymer li-ion battery cell input:5v 800±200mah Output :5v 500mah Size:69*63*16mm Weight:63g Power: press Test button, four LED indicator shows power Charging display: LED light shine 2)Application laptop external battery for laptop ipod iphone etc emergency charger for mobile phone backup battery mini emergency charger mobile phone battery charger. 3)Other Information Payment:T/T in advance Delivery UPS,TNT,EMS,Airline,Boat Minimum Order 50PCS Packaging 50PCS/carton