Thanks MechanicalMan.
socalrider, I have two different Romisen models now. A single RC-N3 Q5 and two, newer
RC-N3-II-NWs. The former no longer appears on Shining Beam's website, but the writeup on the latter indicates it runs fine with some RCR123A batteries, but is not recommended by manufacturer.
Looks like I'll be using rechargeable AAs for now, with a switch to 18650s down the road. I already have a Pila 4-stage charger on order from
Bug Out