JaredM's findings indeed agree with what I also found in a CSLPM1.TG build I made long ago, soon after led4power started listing these leds at his store. I ended up driving the CSLPM1.TG a liitle above 6.5A or so (measured), by means of modifying the Convoy regulated linear “8A ramping driver” replacing its stock R005 sense resistor with a stack of R010 plus R025 plus R050 in parallel sense resistors.
In that picture most stupid thing is to cover flashlight cooling fins with paper. On my M21B FC40 thermal control work fine. Without cooling the temperature never excited 60-62°C
From reddit post
If you dont go with second turbo it is safe. Also at 35% temperature go max around 55°C. With cooling or on bike 35% or 50% is safe also turbo without any second activation.
The product page says it’s limited to 55C. If yours reached 60-65 that may not be outside of safe temperatures, but it doesn’t mean the thermal management is working correctly.
I’ve seen reports of L7 and 3X21A having the same issue in their respective 1Lumen reviews. This trend of nonfunctional thermal management in Convoy lights is concerning.
I tested now and at turbo maximum temperature was 61°C at room temperature of 23°C without any cooling just stand up flashlight. Yes it is hot on touch. Before I was tested thermal regulation and its work. With cooling with fan I can reach 1500 lumens from FC40 stable, if I turn off cooling output will go low to 35%
OK, will just buy then and test them (got 2 multimeter with temperature probes). I always tested the max current, and the parasitic drain, and AUX drain, never tested the temp regulation, but maybe I should do it to. With Anduril UI, you just have to calibrate the temperature sensor yourself, and you can set the temp ceiling yourself. But here you just have to trust it.
Yes I test temperature with contact probe of my DMM UT71E. Thats is the best way to measure surface temperature. I didn’t trust at all of any IR thermometer to be accurate for that little flashlight body.
In all honesty, long ago there wasn't any sort of thermal regulation on these “regular” flashlights, and I don't recall hearing many complaints in this regard, if at all. People would just learn to use their flashlights properly, period. It doesn't takes much effort to sense how the flashlight body temperature raises while holding it in your hands, with it set in the highest modes. This way you ;-) know. Bear also in mind that while holding the flashlight in your hands, you also cool it. For this reason, leaving the flashlight turned on over a surface while set in a mode who would cause it to reach a noticeably high temperature while in your hands, is surely going to cause it to reach an even higher temperature if left alone that way for enough time.
Now, the kind of people who got used to learn to use their unprotected and modified “pocket rockets” responsibly usually ends up removing the NTC resistors on the drivers, as for us it can be more of a hassle than an advantage. I perfectly know what is to have a small flashlight pumping out 30+W of power continuously in my hands without any other “overheating protection” besides my fingers pressing the on/off switch, and I know how to take care of it. O:)
Yes I removed the NTC from my Convoy lienar driver. I used it in one KD host and want to have maximum turbo time because I will use that mode only on my bike helmet.