Replacement Battery for: Turtle Beach Ear Force Elite 800 Elite 800X Gen 2 Wireless Surround Sound Gaming Headset; It can also be used in other 3.7-5V electronic products with power less than 3.7Wh. 100% Compatible with original battery; 180 days warranty Capacity: 1000mAh; Nominal Voltage: 3.7V Battery Type: Li-ion Polymer battery; Safe and reliable battery certified by UL, CE, UN38.3, RoHS Over 300 times cycle life; Long working time