Efest PRO C1

Efest PRO C1 is a usb charger, so no mains voltage running through it and no transformer, so it stays cool.
It takes all the battery sizes listed in the manual from 16340 up to 26650 and also takes 20700 and 32650.

It charges batteries with a trickle current if they are below 2.9v, then the current rises and is exactly 1A as claimed.


A fast charger for high drain batteries, but the charge current is a bit high for standard ICR batteries.

I have no idea. I could understand if it was switching off briefly to monitor the charge like the Enook S2 does.