iPhone 6 6S Battery Case Ultra Slim Extended Charger Case for iPhone 6/6S 4.7 inches with 2400mAh (Black) Super Slim and Lightweight Design: Unlike some of the other battery cases, this case adds almost no extra bulk. It adds only 0.16 in and 2.47 oz. to your iPhone 6/6S, making it convenient to fit your hand or in your pocket. You hardly feel like there is a case on your phone. SYNC-THRU and LIGHT-SYNC technology: This excellent charging case allows you to sync your iPhone to a PC computer, laptop, or tablet without having to take it off. This means charging and data transferring at the same time. You dont need to use/buy additional Micro USB cables, just simultaneously charge your iPhone and battery case together with original Apple's lightning cable. When charging, the phone will be fully charged first. Protective Design: Works as an external a protective case as well as a charger case. Durable materials, Matte UV, design offer premium protection from scratches, fingerprints, smudges; bumps and other daily tear and wear. Longer Battery Life: Built-in 2400mAh capacities, which is equivalent to provide an extra 11 hours of 3G talk time, 9 hours of web browsing, 8 hours of HD video play, 3 hours of 3D gaming or 50 hours of audio to your iPhone 6/6S. Very Easy to Use: When battery is low or you need to charge your iPhone, just press the power button on back of the case. The iPhone will start charging and the 4 LED indicators, the bottom right of battery case, indicate how much juice is available to charge your iPhone.