This is a single Li-Ion 18500 battery cell. Ideal for low power devices such as the Frsky X-Lite radio. These cells have a discharge rate of 10C so are not suitable for high current applications such as vaping.
Please note that you will need a Li-Ion Charger to recharge these batteries.
Please note that this is a lithium based battery and it is important to take care while using, storing and charging this battery, please see this lithium battery guide for more information.