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  1. bwDraco

    Best 18650 batteries for SureFire Fury-DFT and StreamLight ProTac HL5-X

    I know this is an old post, but putting it out there for folks coming from Google. The SureFire Fury-DFT requires an 18650 battery rated for 6A output. The Nitecore and Streamlight batteries you've listed do not meet this requirement, and it appears the Fury is tripping the overload protection...
  2. bwDraco

    High power UV led

    The first thing that comes to mind is the Nitecore Chameleon CU6, which has a 365nm UV emitter outputting 3000 mW, alongside a Cree XLamp XP-G2 providing 440 lm of white light and RGB secondary emitters. It accepts one 18650 or two CR123 cells. Although it isn't as powerful as the Hydro-Force...
  3. bwDraco

    Which aa mini maglite do I have?

    Interesting. I've never heard of an XP-C version of the Mini Maglite LED. I once had the 69lm Luxeon Rebel model but wound up losing it before I got my Fenix LD20. Draco
  4. bwDraco

    Which aa mini maglite do I have?

    Deleted (incorrect information)
  5. bwDraco

    Test/review of Golisi IMR20700 3200mAh S32 (Black) 2018

    Looks like yet another Panasonic NCR20700A cell. Great performers as expected, though the cell getting hot at 30A discharge is a bit concerning. Regardless, it's remarkable just how far battery technology has come... Draco
  6. bwDraco

    Losing a flashlight stinks

    My flashlight collection actually started with a Mini Maglite LED—the original 69lm Luxeon Rebel model—which I lost in a bus during a vacation. I then picked up a Fenix LD20 after shopping around for a better AA light (and that light still works nearly seven years later). By the time I was in...
  7. bwDraco

    Nitecore MH20 - first impressions and a thermal image

    Here's a size comparison: Draco
  8. bwDraco

    Nitecore MH20 - first impressions and a thermal image

    I was looking for a smaller 18650 light at B&H Photo a few days ago (my SRT7GT is too big to put in my bag or keep on my belt these days) and wound up picking up a new Nitecore MH20, with a new Nitecore NL1834 battery to go with it. This isn't the newer MH20GT with the XP-L emitter; I wanted...
  9. bwDraco

    Production UV LED lite fluoresce $100 bill strip?

    I realize this is an old thread, but I'd still like to share some relevant information. This thread predates the introduction of the new (2013) $100 note. The old (1996) $100s were notorious for having security threads that were very difficult to fluoresce under UV. The one I have just barely...
  10. bwDraco

    Observations on the Nitecore SRT7GT as compared to the old SRT7

    Reserved for future expansion.
  11. bwDraco

    Observations on the Nitecore SRT7GT as compared to the old SRT7

    Some more observations: The Smart Selector Ring on the SRT7GT is fly-by-wire. On the old SRT7, the SSR is essentially a dumb "ring position = mode" selector. On the SRT7GT, there are additional electronic controls between the ring and the actual mode selected so the position of the ring may...
  12. bwDraco

    Observations on the Nitecore SRT7GT as compared to the old SRT7

    Moderators: Although this is more of a comparison than a true review, feel free to move this to the flashlight reviews forum if you think it's more appropriate there. So I just got a Nitecore SRT7GT to replace my busted SRT7. If you're not familiar with the SRT7, I encourage you to read my...
  13. bwDraco

    Nitecore SRT7 still turns on after getting brutally smashed

    Nobody was hurt. Thanks for asking. :) I would estimate that the impact was equivalent to at least a 20-foot drop. Draco
  14. bwDraco

    Nitecore SRT7 still turns on after getting brutally smashed

    The head itself is a bit deformed so I'm not really inclined to try to replace the lens - it probably won't fit. I would rather just replace the whole thing. Draco
  15. bwDraco

    Nitecore SRT7 still turns on after getting brutally smashed

    My Nitecore SRT7 was brutally smashed onto a vinyl floor during an altercation today (would rather not go into detail). The glass lens was shattered and the tailcap deformed. :eek: Yet the light turns on and all modes function properly. :faint: The battery was essentially unscathed, which I...
  16. bwDraco

    Drove 5V into a Li-ion cell for just one second, should I be worried?

    Thank you all for the advice. I haven't noticed any abnormalities thus far - temperatures during charging are well within normal limits and the cell is performing as expected. I did not manage to trigger the overvoltage protection; IIRC the highest voltage I saw the cell register on my...
  17. bwDraco

    Drove 5V into a Li-ion cell for just one second, should I be worried?

    While testing a faulty device, I unexpectedly drove 5V USB into a protected NCR18650B cell for about one second. The voltage of the cell itself did not exceed 4.3V, which is inside the 4.35V safety limit, and settled to below 4.1V when power was removed, but I'm not sure if the cell is still...
  18. bwDraco

    Shorted Ni-MH PP3, should I be worried?

    :welcome: I don't think you should be worried. First, NiMH cells don't vent all that easily, and second, the NiMH chemistry isn't volatile the way Li-ion is and generally doesn't catch fire or explode even under abusive conditions. A brief short, even if it winds up generating enough heat to...
  19. bwDraco

    Makita 18V LXT batteries....

    Welcome to CPF! :welcome: Unfortunately, I don't have any Makita tools or batteries so I wouldn't be able to help you here. I'm rather surprised that Makita has not resolved this design issue after all these years. Can't they just wire the monitoring circuit to each and all of the cells in...
  20. bwDraco

    Power Outage, How many Lumens, How many batteries? (for lights and more)

    Re: Power Outage, How many Lumens, How many batteries? Nearly two years have passed since I last posted in this thread and while my illumination tools haven't changed much, I have more charging equipment, including an Anker solar charger (PowerPort Solar 21W), another Anker power bank...

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