TurboCharger Back Pack for Apple iPhone 4
This iPhone 4 Power Case protects your iPhone and re-charges it at the same time. Simply insert your iPhone 4 into the Power Case by separating the two sections and then sliding them back together once the iPhone is in place. The Power Case will automatically commence charging and you'll see the charging icon appear on your iPhone. An LED display shows the level of charge.
Note: if you connect the Power Case with your iPhone housed you can still charge the Power Case using the USB cable provided. This will also sync your iPhone with your computer.