POWERPRO&reg; Apple iPhone 6S Battery Charger Case, iPhone 6 Case, Ultra-Slim External Protective, iPhone 6 Charging Case / iPhone 6 Charger Case, Apple Battery Charging Case / (4.7 Inches) [Black/black] / 3500mah Extended Backup Battery Pack, iPhone 6 Juice Bank, Fits Apple iPhone 6, 4.7 Inch Model Only, Back up Power Bank, Rechargeable Power Case with Stand and Built-in Speakers for iPhone 6 / Removable Rechargeable Protective Case (A.k.a iPhone 6 Battery Pack / iPhone 6 Power Case / iPhone 6 Charger Case / iPhone 6 Battery Charger) Powerful built-in 3500mAh Li-polymer rechargeable battery. Tightly sculptured around a rechargeable integrated battery. Ultra sleek protective battery case provides protection with minimum bulk and impact resistant corners. Resilient 3.3 oz. POWERPRO gives you unimpeded access to camera, ports, buttons . Features enhanced speaker ports to allow sound from your music and videos to flow distortion-free.