Our MRsDNF has been on a quest for good AA boost drivers for some time… and I have followed his progress…
…is an example,
You can find a bunch of his good work evaluating them in the parts reviews.
Thanks so much MRsDNF.
I have the quirk of looking for max efficiency and modest current draw as most of these I do are for power outage type lights that can run on Alks and run for many hours, then turn into battery vampires for a few more hours when they drop out of regulation.