1,5V Travel Rechargeable Battery Pack for iPhone 4 2,1600mAh ... battery,battery case,rechargeable battery pack charger for iphone 4/4s 5V Travel Rechargeable Battery Pack for iPhone 4 ... case and also as an excellent external battery pack. The potent built-in 1600 mAh Lithium ... tests function • High-quality Li-polymer Cell Extended battery pack - 1600 mAh• Sleek, Low-Profile design.Specification: ...