Anker® 7600mAh Extended Battery Case for Samsung Galaxy S4, I9505, L720 (Sprint), I337 (AT&T), M919 (T-Mobile), Not NFC Capable, Not for Galaxy S4 Active [18-Month Warranty]
Upgrade via replacement.We wouldn't give you anything less than the best. Grade A cells chosen from among the top 10%. Rigorous inspection tests to ensure reliability. A built-in IC chip to prevent against short-circuiting. What does this all mean? In terms of quality, you won't find a better replacement. Don't just take our word for it, though -  type in any quick, power-related search on Amazon and see who pops up. As the leader in our industry for the last 3 years running, we know batteries.Smart case for  your smartphone.Backed up by the advanced pin-charging technology that prevents energy waste, the battery combo provides almost its full capacity to your smartphone. Moreover, you can answer or reject incoming calls directly from the case window, saving the hassle of opening and closing the lid. By folding and unfolding the lid, the phone automatically enters sleep or wake mode. It does far more than a simple case.Get to know us.We created Anker with a single goal in mind: to make the smart life easier. That means starting with affordable, high-quality gear and ending with a commitment to 100% user satisfaction and an 18-month warranty. After all, we're customers too.Compatible Models:Samsung Galaxy S4, S IV, SIV, GT-I9500, GT-I9505, SGH-M919(T-Mobile), SCH-I545(Verizon), SGH-I337(AT&T;), SPH-L720(Sprint), SCH-R970(U.S. Cellular/MetroPCS)Note:To prolong the battery's lifespan and efficiency, using the battery and battery case together is strongly recommended.