Would a 3v bulb / LED with a couple of wires attached work? Install the battery in a light and drain it until LVP switches it off, then connect a bulb / LED to it directly?
The majority of my batteries are unprotected.
Has anyone squeezed a sanded down carclo 20mm triple into a FWAA or TS10 (17mm triple lights)? How much light does one lose by sanding 1.5 mm off all around? I guess a lot?
I suspect that would work just fine. The LVP should drop the voltage enough to not burn out the 3v bulb. Depending on the LED it might take a while to get to 0. Some LEDs will (I think) stop pulling below a certain V.
A hot wire bulb would likely be quicker.
Or just put 2 of them in series and donāt worry about the 4.2v starting volts.
Or just use a 6v bulb.
All the Best, Jeff
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I have a technical question:
I have built a 46mm GT4 TA driver for 12V input/output. It works but the problem is that it continues to step down the brightness to a quite dim level. The battery check of Anduril shows me 3.2V even though I use four 40T batteries with 4.0V. So I suppose the flashlight believes that the batteries are empty and LVP reduces the brightness.
Can anyone please give me a hint how I could solve this?
I have been away from the BLF for a little while and it has gone through a serious change in the time ive been away.
Iām just wondering what these brighter numbers mean?
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The brighter the number, the higher the ālikeā to post ratio.
In other words, those threads have more āthanksā per post than other threads.
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Iām not familiar with that driver but I think itās using a Zener Diode to reduce the voltage to the MCU.
I donāt know of an actual fix for this but a possible work around might be a voltage calibration.
In Anduril 2 you can do a voltage calibration and adjust the voltage +0.30v and that may help a little.
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Aaah, gotcha. Thanks
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Adding some salt may help, I would think?
Then you generate chlorine gas 
:ā -ā ) Not that much overall - some 0.5 L of Cl2 off 1000 mAh charge, I figured. You can add baking soda instead to avoid it, but you probably need to add something that dissociates to increase conductivity. Distilled water would have the resistivity in Mohmsā¢cm. Typical tap water maybe a thousand times less. Seawater probably some 50 ohmsā¢cm
I thought about it some more. It looks like even in saltwater a 3000 mAh battery should take over 3 days to discharge at some 35 mA, and probably close to a month in tap water. I hope I got it right, but if so, that may not be the best of methods to discharge one in a hurry.
p.s. IDK anymore, maybe faster, considering that the distance between electrodes may be much shorter than the length of the batteryā¦
A nail and hammer through the cell should discharge it more quickly. Just donāt forget protective gear such as shorts and flipflops.
I saw that in an informative video posted from The Ukraine, I think.
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Hello, fellows! I would like to know if using a low-drain battery (18350 - 3C 1000mA) in an S6 flashlight with an SFT40 3000K driver rated at 8A would be dangerous or if it would simply limit the maximum output of the flashlight. Thank you in advance!
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If the flashlight needs 8A, i think itās better to use a battery with higher A than thatā¦ (at least 10A! or moreā¦ !?
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It would simply limit the output
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Yes it will limit the output, but it will drain the cell quickly , there will be quite a bit of voltage sag, and the cell will heat up quickly.
If you intend to use maximum output, it would be good to get a cell with a continuous rating at or above the maximum current draw. Both to achieve the real max output and for safety sake. I doubt that anything will blow up or catch fire, but with good cells of the correct CDR are relatively inexpensive, why chance it?
I just found this:
From a thread here. Makes sense to me.
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Alright! Thank you all for the insights, they were very valuable!! I asked this because I have two low-drain cells at home and wanted to repurpose them in this S6 that I plan to buy. In my country, itās a bit tricky to find good cells, but I will order the S6 with a Vapcell M11 so that I can make the most of my flashlight and avoid accidents with lithium batteries. Thnks again!
I use Vapcell N40 in all my 18650 flashlights including S6 (5A buck). They all are buck/boost and N40 is rated at 10A which is plenty. And I get maximum capacity of 4000mAh.