Previously on r/flashlight: We had a discussion about the quick stepdown of the H300 with TIR at maximum level (T1) which is about 15 seconds compared to the reflector version, which maintains the brightness for 60 seconds.
There was conflicting information about the reason for this difference. Some said it's because of the TIR optic, while others blamed the battery or its charging state.
Recently u/zeroair posted an update for his runtime test, with a different result again.
So I performed some tests with three batteries, two runs for each. All batteries were charged to 4.15V and had a resting time of 15 minutes before the test.
Battery A: the Skilhunt BL-135 that came with the flashlight
Battery B: an older Skilhunt BL-135
Battery C: Armytek 3500mAh with pink wrapper
All batteries produced similar results, with the exception of the older BL-135 that wasn't used for several months. None of them reached more than 15 seconds before ramping down. The temperature was much lower than on the reflector version that maintained full power for 60 seconds, reaching 55°C.
Skilhunt said that both models use the exact same driver. So I still wonder why the TIR version steps down faster, while staying cooler at the same time. I can only guess that the surface temperature rises much slower than the temperature at the internal sensor. On the other hand, the reflector version exceeded 60°C uncooled and still maintained 60 seconds.
Next step would be to swap TIR and reflector and try again, but it shouldn't matter when Skilhunt claims there's no difference in the driver.
by UndoubtedlySammysHP
