for iPhone Portable Backup Battery Case 1800mAh

This portable backup battery will recharge and keep your iPhone 3G 3GS battery topped up when you want it. It's easy to use, just switch on or off as you need it. The 1800mAh Li Polymer battery add extra back-up strength to the one that is in your Apple iPhone. It provides up to 28 hours of music playback, 8 hours of video, 12 hours of talk time, 7 hours of internet browsing or 360 hours standby between charges. Specifications Back up battery for iPhone 3G 3GS Portable and light weight High capacity battery Power switch Blue LED charging status Dimensions: 113 x 66 x 21mm Capacity: 1800mAh I/O Voltage: DC 5V 0.5A Battery Type: Li Polymer Standby Time: Up to 380hrs Talk Time : Up to 6hrs (3G);Up to 12hrs (2G) Internet Use: Up to 6hrs (3G); Up to 7hrs (Wi-Fi) Audio Playback: Up to 28hrs Video Playback: Up to 8hrs Colour: Blue Weight: 66.5g Package 1 x Blue Storm Backup Battery 1 x USB cable iPhone 3G 3GS not supplied