P50 is specially designed for Iphone 4G/4S. It's ennergy- saving.Once charged,it will last for a long ... NumberP50 TypeEmergency / Portable Socket TypeFor iPhone 4G /4S size125*66*20mm Casewith battery inside Compatibleiphone 4G/4s Capacity1850mAh Product Typeas case and ... ,CE,FCC,Rohs 2012 Hotest portable battery case for iphone 4G/4S,rechargeable beattery case for iphone4s, power bank case for ...