... bank for iphone 4 4s Specifications ModelRJ-I10Capacity2600mAhBattery CellLithium 18650 batteryShell MaterialABS+PCDimension110(L)*26(W)*26(H)mmWeight126gColorBlue, Silver, Green,Pink,GoldInputDC 5 ... power be saved.Capacity can be optional.Compatible to charge for iPhone, iPod, iPad, Smart phones likes Samsung, Nokia, HTC, LG, Blackberry ...