I finaly got my Astrolux MH10 after one of the longest wait for a product so far.
(the original?, found out looking for my problem it’s also sold under Imalent brand)
But it was dead as a dodo, tried a button-top Samsung but no life, looked at YouTube and found a couple of others with dead on arrival lights, so I nearly made a support case of it.
But today I decided to play around a bit more, and plugging in charger and button fiddle gave life sign and a quick flash.
The strange thing here is (from my relatively fresh standpoint) was that trying a button-top keep power the lamp works!
So,
I really can’t say why but maybe someone else might have use of this info.
Also before trying other battery I tried to wash of buttons in case of some “film” causing the problem, looked at some video that operation of the light could be problematic if damp outside, good one that 
-lyse99