I thought it was well known, wasn’t it part of the King/Rook/Queen lineup a little while after SRK became huge hit?
The rook and queen just didn’t pick up so well. For good reason I suppose - single 18650 light is smaller, cheaper, easier to maintain AND yet has better runtime than 3x14500 or 3x 16340. The ones that can run primaries do have its uses though.
What would be cool is to get the Rook, daugher board in one of the AA boost drivers on the driver board (or make an OSHPark contact plate) and have it use 3-AA rather than Li Ion’s
AA’s will be easier to get and are a bit more resilient than Li Ion in long term storage…sharing the current draw between multiple alkaline batteries will lessen the burden on them and they should be able to maintain current draw better, I know when the alkalines get down to ~1vdc the boost circuit really draws hard on em, and they can’t hold up their output curves at much over 1-2A