Additional iPhone 4 battery power has always been a worry for Apple smartphone owners. Numerous companies are trying to find ways to set their accessories apart in ways other than just iPhone 4 battery capacity. The SwitchBack Surge iPhone 4 battery case is one those products with a dual-functionality.

Different from many other iPhone 4 battery, SwitchBack Surge is original and authentic, utilizng a twist on the regular slider-style case. This piece of accessory is made of sturdy and shiny bl...