iPhone 6 Battery Case [Apple MFi Certified], ZeroLemon ZeroShock External Protective 3500mAh Capacity for iPhone 6 4.7&Prime;, (Fits All Mobel carriers of iPhone 6 &ndash; Lightning Connector Output, MicroUSB Input) -Black Maximum power 3500Mah li-polymer rechargeable battery can effectively provide 100%+ extra battery life for your iPhone 6