Thanks for the correction. Well, I feel stupid. I had no idea there were 1.7v lithium primaries in AA form.

The Zebralight spec sheet battery column doesn’t show 14500, but in the comments you can find two models that have a mention of 14500 support. Namely, H52 and SC52, both discontinued. I wonder why, with ZL having the hardware to support 14500 developed, they ended up abandoning it with the H53 and SC53.