Mophie Juice Pack Air Battery Case for iPhone 4/4S
The Mophie Juice Pack Air for iPhone 4/4s is a case and charger all in one that provides you much more battery time and excellent protection. This durable, ultra-thin case houses a rechargeable battery that virtually doubles your time to utilize your phone's features, while protecting your iPhone from every day wear and tear. With the juice pack air protecting and charging your iPhone, you can enjoy up to 36 extra hours of audio and nine extra hours of video playback, in addition to the battery life of your iPhone.