Battery boost

I’ve had my phone for more than a year now and I still have no plans of buying the version nor the other (I heard they’re gonna launch the iphone 5 soon). I’m not so into techy stuff so I’m contented with it but hubby always find something useful. He would buy Iphone accessories that makes the use much enjoyable. It’s given, Iphone battery life is short so you have to charge it more often. With a battery boost (in photo), your phone can last up to 3x longer use. Much like a battery grip for the camera hehe. Wanna get this soon!