Awesome review! I was searching for over discharge protection and your review answered my question!
Just purchased a pair of Samsung 30Q cells for this light i received yesterday, was wondering if anybody is using this battery along S41? Read on some post that 30Q provides too much Amp for this light and it will over heat very quickly. Any chance of the 30Q damaging it?
I am new here. Great review above, I ordered one based off the recommendations. I have one issue with mine, my 18650âs were dead and all I had was the extender tube and two 18350âs so i inserted them and I am afraid I murdered my light⊠Is there any way of repairing the over voltage the light had from my neglect and lack of knowledge? Or should I cut my losses and just order a new one. It was the nichia version. Thanks in advance!!!
Thanks for your review, does the Astrolux s41 use same Nichia led as the BLF-348?
Iâm looking for a flashlight using the same emitter as BLF-348 but with higher output, i have Nichia 219C but donât happy with its tint.
There has been some variation on the emitters used in the S41 (and S41S). I havenât seen any of them with the pinkish tint found in the BLF-348, but do have a couple of excellent neutral ones. Itâs a bit of a lottery though, so maybe order two and hope for the best.
Eagletac does have a great higher output Nichia flashlights, the MX25L3C.
Wow the MX25L3C has Nichia 4500k which is very rare now but its price is too high for me, it seems that every manufacturers are now switching to newer 219C
I also have the above question â will too high amps like the Samsung 30Q damage it?
I just got the Astrolux S41S (Nichia 219B) flashlight and testing it with different 18650s that I currently have.
Measuring tailcap current (Mastech MS8229 multimeter that may have high cable lead resistance, and not calibrated), with the Samsung INR18650-30Q, Iâm getting 7.6A [freshly off the charger] (for sure itâs much higher than that since my multimeter leads have added resistance). Any idea how many amps are being pulled from a freshly charged INR18650-30Q?
One other test I noted is that when used with Liitokala protected NCR18650B (also freshly charged), even at âHigh 2â, the protection circuit appears to trip (flashlight blinks and shuts down). If the protected NCR18650B is discharged a bit (~ 4.10v), then the protection circuit wonât trip anymore at âHigh 2â setting, but it will still trip when set to âTurboâ. Iâm wondering how many amps is the protection circuit of the protected NCR18650B? (Iâve never seen this protected NCR18650B âtripâ before, so at least now I know its protection circuit is really working. FYI, even when freshly charged, the protected NCR18650B used with either Astrolux S1 and Astrolux S2 on âTurboâ mode does not trip.)
The NCR18650B is not recommended for the Astrolux S41. I am using a Samsung INR18650-30Q in my S41 but I donât leave the light unattended when I am using it at Turbo (or High 1 and 2 for that matter). Could you measure the current draw at every level using thick wires? I am really curious about the current draw of the S41 but I donât have any DMM that can measure more than 2A. Using high-drain cells like the 30Q, VTC5/6, HG2 is safe as long as you know what you are doing. This is a direct-drive light and you shouldnât leave the light at Turbo if you canât monitor the temperature. This guy measured the current draw at 9.4A (!) using the Samsung 30Q cell and a thick wire (equivalent to a spring bypass).
I can confirm maukkaâs observation regarding the UI not working when using Turbo for more than a few seconds. This light doesnât have thermal regulation and will eventually fail if left at Turbo repeatedly, in my opinion. It would have been better if the light were to use the Bistro firmware (but would require the attiny25, the S41 has the attiny13 if I am not mistaken).
EDIT: Had to shorten the Lygte link, the original link doesnât work.
Astrolux S41S (Nichia 219B) Turbo mode - current consumption with different 18650s:
With freshly-charged INR18650-30Q, draws higher than 10 amps momentary, not sure if the method of measurement is correct (using 18350 short tube, so thereâs slightly less resistance; in actual, an 18650 battery with 18650 tube will have slightly more resistance than the testing done above.
Youâre correct, the protected NCR18650B trips at somewhere around 6A (also shown in the video).