YESOO [ 2x 2600mAh ] NFC Technology Standard Li-ion Battery For Samsung Galaxy S4 i9500 (Compatible Model: AT&T, T-Mobile, Sprint, Verizon, US Cellular, Metro PCS, Cricket, And International) This Battery Is Equipped With An NFC Antenna Cell type: Lithium-ion Technology Capacity: 2600mAh (Class 10 - High Quality) Battery life will vary depending on your specific usage, disable Bluetooth, Wi-Fi and GPS when not in use as well as any unnecessary notifications.