I am using this charger
https://www.fasttech.com/products/1119501
I made my own kit when I ordered my SS Vamo V2 instead of ordering one of the pre made kits. One thing I have read several times is to pick the Nitecore/Panasonic kit over the "fire" kits.
They seemed to have learned and are offering a kit with a Nitecore charger.
$53.63 Vamo V3 Variable Voltage E-Cigarette Battery Compartment Set with OLED Screen - with Nitecore I2 US battery charger/charger cable/2*Panasonic 18650 batteries at FastTech - Worldwide Free Shipping - this is what I am eyeballing.