mophie Black Juice Pack Air for iPhone 4 (1145_JPAXP4) Type: Battery Case Compatible Phone Manufacturer: iPhone 4 Specifications: Standby Time: Up to 270 hours Talk Time: Up to 6 hours on 3G / Up to 12 hours on 2G Internet Use: Up to 5 hours on 3G / Up to 9 hours on Wi-Fi Audio Playback: Up to 36 hours Video Playback: Up to 9 hours Product Dimensions: 5.07 x 2.51 x 0.68; 2.5 oz Battery Capacity: 1500 mAh Features: juice pack Legacy The juice pack air for the iPhone 4 provides the very best of seven generations of product development and design. Battery Extender and Case in One The juice pack air for iPhone 4 combines rechargeable external battery power concealed inside of a protective form-fitting case. It offers the full protection of a hard-shell case with an ultra-thin, light-weight, low-profile design. Twice the Power The juice pack air for iPhone 4 virtually d...