Are you familiar with Kanger Dripbox kit black?

The Kanger Dripbox kit black takes an unmarried 18650 that suits right into a cylindrical slot inside the case and secures with a screw-on bottom cap. The cap is a clever design, with outer steel threads to secure the cap, however with every other finger screw adjustment in the cap to extend the touch and save you battery rattle. It’s really satisfactory.