Apple Smart - battery case - back cover for cell phone

This Smart Battery Case gives you even longer battery life while offering great protection. Inside, a soft microfiber lining helps protect your phone. And on the outside, the silky, soft-touch finish of the silicone exterior feels great in your hand. A soft elastomer hinge design makes it easy to put the case on and take it off. Charge your phone and battery case simultaneously for increased talk time up to 26 hours, Internet use up to 22 hours on LTE, and even longer audio and video playback.