The Slim K1 by Efest is an intelligent external battery charger, capable of charging one battery at a time.
It will allow you to charge your batteries faster, with a maximum current of 1A.
Compatible with the following batteries:
18650, 20700, 26650, 10440, 14500, 16340, 17340, 18350, 18500 et 26500 de 3.6 à 3.7V Li-ion et LiMn.