C8+ SFT40/8A – Battery – Temp

In my previous post I mentioned that, in my opinion, the temperature sensor in my flashlight seems to trigger later than it should. It might be poorly calibrated or there could be some measurement error, but it really does seem that way. I decided to test the runtime on 100% mode, and it lasted 47 minutes with a Samsung 30Q and 56 minutes with an EVE 35V.

I also made a graph of relative brightness over time and it turns out the flashlight maintains around 1200+ lumens for most of the runtime before it starts blinking due to low voltage. Combined with the relatively short runtime, this suggests an average discharge current of over 3A, which indirectly supports the idea that the light steps down later than it should due to temperature.

I also compared the EVE 35V and Samsung 30Q in this flashlight, and there is absolutely no noticeable difference between them, except that the EVE runs a bit longer due to its higher capacity. If you're choosing a battery for a flashlight that draws around 8–10A, the EVE 35V is perfectly suitable for that.

P.S. I rechecked the data many times and did the measurements three times — the graphs matched each time. It really does sustain an unusually high average output.