I do not know if anyone might be interested, the cells were not consumer. They had cardboard tube surrounding the cells and heavy gauge tabs spot welded to top and bottom, if I am remembering correctly they were priced ~ $13.00 and they were in the battery row near a 16340 / charger combo.
I have done a search and found no discussion about using this flashlight as a host. It looks like is would make a nice looking laser.
$18.70 - UltraFire C5 Stainless Steel CREE P3-8B 2-Mode 4700K LED Flashlight with Strap (1*18650) - Ultrafire Lights
Has anyone tried this, if not, how would...