I think I already measured this somewhere, if I recall correctly the short circuit protection triggers around 0.5Ω, above that the current passes. I just tested with 100Ω and the current is 40.4mA with a 4.15V cell.
I measured the efficiency of the driver here :
(Not counting springs)
Not sure what T2 mode is, I think I used the default modes.
Aside from that, good review, those H04 and H04 mini are pretty good, on the light side for 18650, most of the competition is heavier, some significantly so, modability is pretty good, altgough the glued tube (and so non interchangeable tube) is disappointing. The interface is okay in B mode, but the lockout when holding from off is annoying as I always expect the light to ramp up.
Regarding the clip on holder that people rave about, I find it uncomfortable after a not so long use duration, I much prefer the classic silicone style holder and I use a ZL one with my H04s.
Personally I think the H600 IV is better, I have no use for magnet nor integrated charging, it’s a bit lighter, better build, better efficiency, actual thermal regulation and especially higher sustained output.