So now I can also confirm it MCU and FET on the HL drivers for this light are faked from some chineese manufactory

MCU has not even unusual markings it has even a spelling error missing an S in the type
“ATMEL20U”
“TINY85”
“7 digit batch number”
while the original Atmel has
“ATMEL 4 digit batch”
“TINY 85”
“20SU”
“triangle”
and 3 rows batch data on the back side where the fake has nothing

I have measured the FET used on the red MT09R driver
its labeled like the original Vishay cant tell any difference
Original @10A and 4.7V Gate
https://eu.mouser.com/datasheet/2/427/sir800dp-93246.pdf
SIR800 —> 2.6mOhm —> 26mV —> 0.26W
the SIR800 has pretty stable resistance down to 2.5V Gate voltage so its a good FET for 1S lights as well

Fake
@4.7V Gate like the MCU delivers to the FET
I got 38.3mV 10A —>3.8mOhm resistance

@3V Gate
I got 165mV 10A —> 16.5mOhm

@2.5V which the original should have around 2.8mOhm as its gate voltage gets very deep till 2V pretty stable
I get only 2A with reasonable input volatge and the stunning drop on the FET of 1.1V
so here the FET has 0.55Ohm

Conclusion

the FET HL use is definately some sort of fake which wont work on any 1S driver well
with 4.7V on gate it has a usable resistance but still this FET is like the MCU fake