Two pack of Efest IMR 21700 rechargeable high-drain 3700mAh vape batteries. RoHS, CE, MSDS and UL certified. 3.7 volts. Maximum Discharge Current : 35 amps. Chemistry: Lithium Manganese Dioxide (Li-Mn02).

Take great care when using these high-powered batteries. Always charge e-cigarette batteries completely before using. Do not puncture, cut, crush, burn, or expose to water, fire or high temperature or humidity, or high magnetism. Do not store in your pocket, purse, bag or other metal containing objects to avoid short-circuit. It is your responsibility to understand the potential dangers of using and handling all batteries.