18650 Casing Adapter

This adapter should help replace a 3xAAA Battery Holder in most flashlights.

So far I have tested it only with unprotected 18650 cells. You might need to scale it up a few percent for the additional wrapping on protected cells and sand the outside for a proper fit.

In my example it was for my Anker LC40, but the original measurements didn't fit my 18650s and it was too long to fit properly in the LC40 with it being able to be closed.