These batteries are suitable for any secured battery carrier such as u.a. High-power flashlights and e-cigarettes. Lithium-ion batteries have a higher power density a higher voltage and a wide operating temperature range as well as a lower weight. Features Applicable for up to 500 charge-discharge cycles Large operating temperature range Flat topHolds 85% of capacity for over 6 months Available as a bulk Specifications Electrochemical system: Ni-Iron Capacity: 2600mAh Nominal voltage: 3.7V Jacket: PVC label