Efest Pro C2 charger The Efest Pro C2 is a 2 bay charger powered by mains or 12v adapter. With the 12v adapter, the charger remains cool, Using 240v mains, the top of the charger reaches just over 50°C . The Pro C2 will take all of the battery sizes stated in the manual, and also 20700 and 32650. The Pro C2 charges with a tricle current if the battery is below 2.9v. Charge current with 1 battery in is around 0.86A, with 2 batteries, it was actually marginally higher at around 0.87A. A fast charger for high drain batteries, but the charge current is a bit high for standard ICR batteries.