If you take the head off the battery tube and underneath the head where the positive battery contact is it is surrounded by white plastic then you have the plastic insert. Not brass
Yeah the revised MINI has a brass insert, you can see it easily when you remove the battery tube. Mine was the wrong way round (needed rotating 180 degrees). I also applied some thermal compound to the touch points under the heatsink.
21700 batteries will fit the EA01 with adapter, although may get slightly compressed if it’s a bit longer (unprotected) 21700.
With EA01 (with XHP50.2), I’d say 21700 batteries will be good.
Unfortunately my EA01 (with SST40), turns bluish even when using not-high-drain 26650 batteries… since it shipped with this bluish-on-high-brightness problem… BG is “still processing” my complaint for this issue… They mention will send a new light bulb to me (I wonder what it meant — I doubt they mean they’ll ship a complete replacement flashlight since they just said “light bult”…)