Ordered the M31W, can run on a CR123 primary or AA - fantasticIt needs 1.8 volts for full power. A L91 would get you there. I have used a regular 1.5 with mine and it’s not far off from being full power. Till the voltage starts dropping
Great information. Thank youI run single Eneloop(1.2v) in M31w and output is similar to medium mode on Malkoff’s 3mode li-ion MDC Neutral head, so I’m guessing around 50 lumens. Very useful beam, similar to M61LLLL. Can up lumens a bit with 1.5v aa and get full output with Olight’s weird 2.4v 14500 battery which I also use in MDC AA light to boost moonlight mode to over 1 lumen.