1.Rechargeable battery 2.Fatory sales directly with good price 3.Color:black,gold,pink,white 4.1 ... check it Specifications Product Name :External Battery for iPhone 4&4s Product SKU : YJ1011 Capacity : 1500mAh Nominal Input : 5V,400mA Nominal Output ... Time : Above 8 hours 2G Network Above 4 hours 3G Network Internet Use : Above 3 ... Above 5 hours Barcode : 6954160400016 External Battery for iPhone 4&4s