Tthe 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. You can charge your phone and battery case simultaneously. And when fully charged, the Smart battery case delivers longer battery life. This results in increased talk time, Internet use, and even longer audio and video playback.