Zinx 2600 mAh Samsung Galaxy S4 Replacement Battery for I9500, I9505, SGH-M919 (T-Mobile), SCH-i545 (Verizon), SGH-i337 (at&T), SPH-l720 (Sprint) Not for Galaxy S4 Active or S4 Mini (S4) Tested under strict quality control standards, CE and ROHS certified Top-rate A+ battery cells, over 500 repeated charging cycles Over-heating, short-circuit, over-charging & over-discharging protection Voltage: 3.8V and capacity: 2600mAh Contains: 1 x cell phone battery