Those carrying an iPhone know the pain of not being able to change the battery because you can't. So when you run out of juice, that's pretty much it for you. The device features two Evolta rechargeable batteries that only take a few hours to retain a full charge and can be used for a myriad of devices other than your iPhone or iPod Touch. Far lighter and more design friendly than other iPhone chargers the Pocket Power can be yours for just 3,480 yen ($36.45) here.