Anker iPhone 6 / 6s Battery Case [Apple MFi Certified] Premium Extended Battery Case for iPhone 6 / 6s (4.7 inch) with 3100mAh Capacity / 130% Extra Battery (Black) Anker iPhone 6/ 6S battery case [Apple miff Certified] premium Extended battery case for iPhone 6/ 6S (4.7 inch) with 3100mAh capacity/ 130% extra battery (black)