YESOO NFC 5200mAh Extended Battery And Back Cover For Samsung Galaxy S4 SIV i9500 (Blue) Compatible Models: Samsung Galaxy S4, SIV, GT-I9500, GT-I9505, SGH-I337(AT&T), SPH-L720(Sprint), SGH-M919(T-Mobile), SCH-R970(U.S. Cellular/MetroPCS), SCH-I545(Verizon) Capacity: 5200mAh (Class 10 - High Quality / NFC), Voltage: 3.7V Cell type: Lithium-ion Technology This Battery Is Equipped With An NFC Antenna Excellent quality at a great price.