Mophie Juice Pack Air for iPhone 4S/4 Black
The Juice Pack Air is a rechargeable external battery concealed inside of a protective form-fitting case for the iPhone 4/4S. It offers the full protection of a hard shell case while providing virtually twice the battery life of the iPhone alone.
• Rechargeable 1500mAh battery extender and protective case in one
• Virtually doubles the battery life of the iPhone -- Up to 270 hours of standby time. Up to an additional 6 hours on 3G and 12 hours on 2G of Talk Time. Up to 36 hours of additional audio playback. Up to an additional 9 hours of video playback.
• Soft touch finish - Sleek design includes a new, soft touch, rubberized finish and silver band that mirrors the look of the iPhone 4/4S.
• Quick recharging speed. Completely recharge iPhone in 1 1/2 hours.
• 4 LED Light Status Indicator - Tells you how much "juice" you have left in the case for charging.
• Pass Thru USB - Included micro USB cable allows you to simultaneously charge and sync your iPhone 4/4S to iTunes without ever having to remove the iPhone from the case.
• Acoustic Sound Enhancement - Open ports at the bottom/front of the case acts as an actual speaker box, redirecting sound from the bottom of the iPhone to the front, resulting in a richer, fuller sound quality.