Gorilla Gadgets 5400mAh Samsung Galaxy S4 Extended Battery + FREE Black Mist Protective Back Cover with NFC (Compatible with Samsung Galaxy S4 S IV, GT-I9505, SGH-M919 (T-Mobile), SCH-I545 (Verizon), SGH-I337(AT&T), SPH-L720 (Sprint), SCH-R970 (U.S. Cellular/MetroPCS), with S Beam/NFC)