Re: Olight X7 Marauder unboxing (3x XHP70, 4x 18650) review in progress
Tested the thermal regulation by turning the fan on and off on the highest mode. Fan cooled and fan off runtimes also shown for reference.
The thermal stepdowns happens when the surface is at 54-56°C. The increase in output is not instant if you start cooling the light off after it has already stepped down due to heat.
Only after the light has cooled significantly it starts to ramp back up again. I measured 38°C from the surface 6 minutes after turning the fan on at 10 minutes. This is when the output suddenly jumped up a bit for the first time. The surface temperature rose from 36 to 41 during the next 17 minutes while the fan was on and the light kept getting brighter. It finally (almost) reached the output that was achieved with the test where the fan was on all the time. Turning the light off and on again didn't restore the original turbo s levels, because the batteries had already depleted a bit. Temperature never rose above 41°C afterwards while the fan was on.
I turned the fan off again at 45 minutes when the temperature and output were stabilized. After this the temperature started climbing again and reached 56°C at 52:40 after which a stepdown naturally happened again. Temp stayed at 53° from there on out.
Finally I turned the fan on at the 1 hour mark. The behaviour was similar as before: output increased when the surface had cooled down to 38°C.
The temperature was 40°C at 1h 25min when the final stepdown happened because of the low battery voltage.