>>2781487>>2781497Picrel shows the cheap taclight and the 3xAAA carrier they come with. Lots of these lights want button top 18650s, so I leave like 1cm of nickel tab on the cell from the power tool battery and bend it over and they fit pretty well.
The issue you may run into, lots of 18650s that come in flashlights with the button top could potentially have a little protection circuit in the cell itself. I have a Coast light like that. I’ve been curious about running plain 18650s in there and it’s not clear whether the light has low voltage cutoff circuitry in it or you need to make sure you shut the light off manually before the battery gets too low. Lithium cells will get fucked if you run them too low.
