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Thread: short protected 18650 needed

  1. #1
    *Flashaholic* turbodog's Avatar
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    Default short protected 18650 needed

    Had some 'aw' protected 18650 cells from hds. They are all gone, and I am looking for a replacement.

    Need to be protected and short/thin as possible.

    Bought a batch of panasonic but the button top and triple shrink wrap make them too large to fit.
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  2. #2
    Flashaholic* adamlau's Avatar
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    Default Re: short protected 18650 needed

    Good luck. One option is to roll your own with purchased PCBs and copper conductive tape. Another is to have them custom made by AA Portable Power Corp, or possibly vendors such as IMRBatteries/Liion Wholesale/et al. There is always LiFePO4 and frequent changeouts

  3. #3
    Enlightened
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    Default Re: short protected 18650 needed

    Would a protected 16650 work?

  4. #4
    *Flashaholic* turbodog's Avatar
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    Default Re: short protected 18650 needed

    Quote Originally Posted by Mister S View Post
    Would a protected 16650 work?
    That would help diameter, but the length is still a problem.
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  5. #5
    Flashaholic* adamlau's Avatar
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    Default Re: short protected 18650 needed

    18650. 18mm in diameter. 65mm in length. 0 round. A PCB adds at least 1.5mm in length. Either leave the adhesive conductive tape exposed at the positive (not recommened), or cap it with a thin layer of conductive epoxy or a small magnet. That is the best you can hope for.

  6. #6
    *Flashaholic* turbodog's Avatar
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    Default Re: short protected 18650 needed

    The old 'aw' cells from hds were just right. shorter than other protected cells. shrink wrap that was thin.

    This is your life, and it's ending one minute at a time.
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  7. #7

    Default Re: short protected 18650 needed

    tenergy used to make flat top protected 2600, the top was sticking enough to have a contact in series, i used them for solarforce l900. those were the shortest protected 18650 i've seen, that was 7 or so year sago, eagletac were short too, according to some posters here, but i never used them personally. this question pops up every couple of years, use search, you may find other options,
    Last edited by alpg88; 02-20-2021 at 09:20 PM.

  8. #8

    Default Re: short protected 18650 needed

    My Keeppower protected 16650 cells measure 68mm at the button.

  9. #9
    *Flashaholic* turbodog's Avatar
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    Default Re: short protected 18650 needed

    Quote Originally Posted by lightfooted View Post
    My Keeppower protected 16650 cells measure 68mm at the button.
    Turns out it's a lost cause. My modern HDS lights with 18650 tube will accept protected cells. My older one will not, regardless of how short.
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  10. #10
    *Flashaholic* turbodog's Avatar
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    Default Re: short protected 18650 needed

    Quote Originally Posted by turbodog View Post
    The old 'aw' cells from hds were just right. shorter than other protected cells. shrink wrap that was thin.

    And I was wrong on these cells. They are pretty short, but not short enough for the out-of-spec 18650 twisty tube.
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  11. #11
    Flashaholic* adamlau's Avatar
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    Default Re: short protected 18650 needed

    HDS should have a 2.0v cut off. A protected cell isn't necessary.

  12. #12
    *Flashaholic* turbodog's Avatar
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    Default Re: short protected 18650 needed

    If you are always able to start with a fresh cell. And given the problems with parasitic drain and HDS... I don't trust the light's protection.
    This is your life, and it's ending one minute at a time.
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