LifeCHARGE MFI Approved Rechargeable Extended Battery Case for Apple iPhone 5/5s - Black Satin Rubber Designed for use with Apple iPhone 5 and 5s For a custom fit and extended battery life. Polycarbonate case with a black satin rubber finish offers reliable protection against damage. Built-in 2300 mAh lithium-polymer battery for 8 hours of talk time, 40 hours of audio and 10 hours of video LED indicators keep you informed of the current charge status. USB connectivity allows you to recharge the case while charging your phone.