shao.fu.tzer
Flashlight Enthusiast
Another factor complicating the situation . . . Counterfeit CR123 cells do exist. Cheap versions branded to look like the good stuff. Always buy from a trusted dealer, store, or site.
I would consider L.L.Bean a trusted dealer... I'm pretty sure they buy direct from Surefire... I bought of a case during their last sale - all dated 2020 and the voltages vary on the cells up to .2V - whether or not that's dangerous to use in a multi-cell application, I'm not sure... Has anyone done any extensive testing on this? Someone with a few spare UF-501s should run some tests using cells reading slightly different voltages, starting from a .1V difference up and see at what differences in voltage will cause cell failure/venting/explosion.