The Kroma 217 mod is an external battery device and can utilize either a single 18650, 20700, or 21700 battery.
It has an output range of 6-100W if used with a 21700/20700 battery, or 6-80W with a 18650 battery.
The device has a USB Type C port for charging, but the supported charging rate is only stated as 1.7A.
The Kroma 217 features both Variable Wattage and Variable Voltage modes, and all your vaping data is displaying nicely on the color screen.
Battery Cells, Chargers, Wraps & Cases here