RAVPower 2800mAh Galaxy S4 Li-ion Replacement Battery with NFC Function for Samsung I337, Verizon I545, Sprint L720, T-Mobile M919, R970, I9500, I9505 (Not for Galaxy S4 Active or S4 Mini) Near-field-communication (NFC) technology to communicate with other NFC tags Compatible Models: GT-I9505,GT-I9506, GT-I9505G, SGH-I337 , SGH-M919, SCH-I545, SPH-L720, SCH-R970, T-Mobile, SPH-L729T, SGH-I337M, SGH-M919V, SCH-R970X, SCH-R970C, and other model with NFC. Top-rate A+ battery cells, over 500 repeated charging cycles Not compatible with Galaxy S4 Active or S4 Mini Voltage: 3.8V Capacity: 2800mAh