【convoy】H4 and B35AM options are updated

I had two and they both burned very quickly, even the second at only 5A

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I had two and they both burned very quickly, even the second at only 5A
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O ok, did you get them installed by convoy or did you reflow them?

Thanks for the reply Pacolux

Reflow

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.

led bare convoy reflow on mcpcb xhp50.2 6v. I surely did something wrong

Is Convoy M21B GT-FC40 thermoregulation working?
Just yesterday saw this post on reddit, guy got 80C on fins, is it one off, or is there something wrong with thermal control on it.
(link is external)
(https://www.reddit.com/r/flashlight/comments/qy72hy/she_is_hot/(link is external))
I'm planning to buy two of them for bike for off road trip (so I won't feel the heat, but I still can be burn, when trying to take it out, or to turn it off, after an hour or so of it working).
And well it can harm the battery and led too.

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.

My M21B GT-FC40 runs fine at 35% for quite some time, plenty of light at that too.

Not having thermal regulation on a light can be acceptable. Advertising thermal regulation when it does not work is a problem.

@Barkuti the problem is, I want to buy them for my bike, for off road riding, so I won't feel the heat.
And it's advertise to have thermal control, so I can't harm the led or battery, and I will probably use the 100% mode all the time, and trust that thermal regulation, if it works.
I want all the light I can get, without harming the battery or LED.

I tested again with second activated turbo and control works bu very slow down output. My M21B reached 70°C I turn off flashlight at that point. So be ware not use at all turbo or just use 35% or 50% output which is safe. Also on bike you have active coolling. I also used my M21B on my bike two weeks ago. On turbo it is stay about 2-3 min and step down. So for riding it is not best mode at all. Stay with 35% at which any boost Convoy drivers have stable output and you will be ok with temperature.

Yes, all R9080

NVSW519AE
sm455M450L5R9080

NV4WB35AME
sm455E800KR9080

I will gradually use green ar-coated lens on all products

Hi Simon, any details over M21e with culpm/sft40, try checking your official store for details about output current but those but cannot find any. Thank you.