Iwoo 2800 mAh Power Bank Battery Charge Case Cover for Samsung Galaxy S4 I9500 , Black Simply charge this Sumsung Case Charger from your PC using the provided USB Cable until it is full; then simply charge your device whenever you need power Foldable stand for supporting your Phone easily Great for traveling and long flight - for your S4 I9500 Easy installation and removal Ultra-thin design and perferct dimension Works as both an extended Phone battery set and a protection case