Hot back-up battery charger for Iphone. High capacity of 1600mAh battery built inside Extend run time of iPhone about 1.5 times longer Transfer data&charge iPhone at the same time Easy operation,Just plug iPhone into the back-up charger for charging Pefect design can protect iPhone Specifications: Dimesion:125*67*23mm Capacity:1600mAh 3.7v Color:Blue,Green,Grass green,White,Black,Orange,Gray Battery Type:Polymer battery Rated Input:5V/0.8A Rated Output:5V/0.5A