Floureon 5600mAh Extended Battery + Black Door Back Cover for Samsung Galaxy S4 i9500/i545, Galaxy J, M919 (T-Mobile), I337 (AT&T), L72 (Sprint), R970 (U.S. Cellular/MetroPCS) [Not for Galaxy S4 Active] 100% Brand New Floureon Battery, an excellent backup for your phone, including a special door back cover. Built-in integrated microchip inside prevents overcharging and extend battery life. Battery Type: Lithium Ion & Voltage: 3.8V (Charging limit: 4.35V) & Capacity: 5600mAh Compatible model: Samsung Galaxy S4, S IV, I9500, I9505, Galaxy S4 LTE I9506, Galaxy J, M919 (T-Mobile), I545 (Verizon), I337 (AT&T), L72 (Sprint), R970 (U.S. Cellular/MetroPCS) [Not for Galaxy S4 Active] With quality guarantee to ensure your safety and give you a harmonized user experience.