Get the most out of your iPhone 4 with the Mophie Juice Pack Air made for iPhone 4. This durable, ultra-thin case houses a rechargeable battery that virtually doubles your time to rock, talk, surf and send, while protecting your iPhone from everyday wear and tear... and does it all with a style that mirrors the aesthetic of the iPhone. 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 iPhone's battery life. The Juice Pack Air adds up to 6 hours of talk time while protecting your iPhone (see larger image).