The Vape battery charger 21700 is a rechargeable battery charger for the Efest vape pen.The 21700 charger features a rechargeability of up to 1.6Ah, and is available in the US for $59.99.It is compatible with the following batteries: The following batteries are currently included with the 21700: Efest Battery: E-Liquid Capacity: 1.2L / 0.45W / […]