Mini Power bank for iPhone 1.works for iphone4/4S,iphone 3G/3GS,iPod. 2.capacity ... Li-Polymer battery unbinds you from the worry of power shortage of your iPhone.3.Unique holder design, ... more than 500 circles,the power can still remain 82%.6. Intellectual protection chip: protection for overcharge, overdischarge, overload ... Ion technology provides improved energy density Mini Power bank for iPhone