iPhone battery problem really frustrates a lot of people. For some reason, you may use iPhone to access the internet while the iPhone 4S would just run out of battery all of a sudden. But don't be upset, here comes your savior! If your iphone 4S battery doesn't give you enough time on the internet, then no other choice but a external battery comes close for extending your iphone battery life for keeping you online. This Wireless Power Charger makes sure you can charge your iPhone 4S on the go.