Product descriptions from the supplier 3.7V Voltage: Provides consistent power for reliable performance. 2200mAh Capacity: Offers long-lasting energy for extended use. LiNiMnCoO2 Positive Material: Ensures stable and safe operation. 800 Cycles Lifespan: Durability tested for repeated charging. RoHS, CE, FCC Certified: Meets international safety standards. About this supplier Shenzhen Everwin Tech Co., Limited is a 20-year battery manufacturer specializing in lithium iron