This has to be one of the best things you can have for you iphone. This is an external battery to recharge your iphone enclosed in the case itself. Other than the slightly larger backside to hold the battery there is absolutely no difference between this and any other case. You get to keep full functionality of your iphone with cutouts for the buttons and the camera. This case contains a 1900mAh battery and as the iPhone only has a 1420 mAh battery you can fully recharge your iphone and still have some battery power left over. The case is made out of a hard, nonslip silicone

This may be compatible with other devices but we only sell it for the iPhone 4 and any purchase for a different device will be your issue if it doesn’t work.