MiLi MFI Power Spring 5 External Battery Case for iPhone5 / iPhone5s - Gray 1.Protective case,back-up battery and power bank 3 in 1:Slim and stylish, serves as a protective case when not charging the iPhone. 2.Super slim and light with only a half weight of iphone 4S. 3.More than doubles the run time of iPhone 5 4.Enough room for earbud hole which is suitable for any other brands earbuds;Hidden cable design makes spring5 universal for more Apple devices such as ipad mini;Perfect accurate hole design for both earbud slot and camera. 5.Self-charging time: 5 hours (0.5A by PC); 3 hours (1A by adaptor);Capacity: 2200mAh; Input: 5V/1A(max); Output: 5V/1A(max);Smart 4 LED power indicators for 25% capacity each one.