Sabrent 2400mAh MFI Apple Certified Premium Rechargeable Extended Battery Case for iPhone 5s, 5 (PB-IPH5) Apple MFI certification ensures full compatibility with ALL version of iOS (including iOS 7 and iOS 8). Transfer data or charge both internal and external batteries through a micro USB cable (included). 2400mAh capacity doubles the battery life of an iPhone 5s or adds 120% to an iPhone 5 while only doubling its thickness (adds 0.37in). 4 LEDs on the back display the battery case's remaining power. Two color frames (one smoke and one Black) included.