Alpatronix BX100 Apple MFi Certified Ultra-Slim Protective Extended iPhone 4S / iPhone 4 Battery Charging Case with Rechargeable & Removable Power Cover &nbsp;[Fits all models of the Apple iPhone 4 & iPhone 4S / Full iOS 7+ Compatible Support / 1900mAh Battery Capacity / No Signal Reduction] &ndash; (Pink/White)