Galaxy S4 Extended Battery, MPJ 5200mAh Extended Li-ion Battery For Samsung Galaxy S4, I9500, Verizon I545, ATT I337, T-Mobile M919, Sprint L720 (Not for Galaxy S4 Active) With NFC/Google Wallet [NFC/Google Wallet Capable] MPJ 5200mAh Replacement Li-ion Batteries for Samsung Galaxy S4, I9500, Verizon I545, AT&T I337, T-Mobile M919, Sprint L720 (Not for Galaxy S4 Active) 12-Month Warranty This battery is larger than original battery, standard back covers and standard protective cases like Oterbox can't be used. The extended battery is compatible with special back cover as the photo shows, which is included in the package Battery type: Li-ion; Voltage: 3.8V; Capacity: 5200mAh; Over 500 Repeated Charging Cycles Built-in IC chip prevents overcharging. Full NFC functionality. Guaranteed to fit your phone Package contents: 1 x Extended Battery for Samsung Galaxy S4, 1 x Black Back Cover