The BIO V2 charger from Efest accepts all cylindrical batteries up to 26mm in diameter and 65mm in length. This includes major vaping batteries such as 18350, 18650 and 26650.

It has three optional charging currents of 0.5A, 1A and 2A for fast charging. It also has two USB outputs for USB charging, one at 0.5A and one at 1A.

The Efest BIO V2 can also reactive low voltage batteries with a voltage greater than or equal to 0.6V, bringing your "dead" batteries back to life.