2 PCS Trustfire 18500 1800mAh 3.7V Li-ion Protected Battery
Specifications:Model: 18500(Protected)Size(mm): 51(Length)x18(Diameter)Output(V): 3.7Rechargeable high discharge rate,  no "memory" effectShort circuit and over current protectionLong cycle life environment friendlyRechargeable battery with PCBPackage include:100% Brand New x 2 PCS TrustFire 18500 1800 mAh Protected Rechargeable Batteries