show me your helmet light battery packs- Mtbr.com
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  1. #1
    Randomhead
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    show me your helmet light battery packs

    I'm thinking about going with a DIY helmet light instead of the Princeton Tec that I have been using. I'd like to see people's battery packs, particularly in use. Thanks!

  2. #2
    mtbr member
    Reputation: znomit's Avatar
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    I use a quad AA pack wired up as two dual AAs(for redundancy).
    Scavenged the pack from an old nighthawk light.

    Long cord, battery lives in rear jersey pocket, all one piece, no connectors.
    Keeps the batteries warm and weight off the helmet.

    Here next to the minewtx2


  3. #3
    Light freak
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  4. #4
    Randomhead
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    scar, is that just heat shrink?

  5. #5
    Light freak
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    2x 18650 Li-Ions rubber coated with PlastiDip - http://www.plastidip.com/home_solutions/Plasti_Dip

  6. #6
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    Goes into my camelbak. Will also mention they are for sale. In 4, 5 and 6 cell holder flavors.




  7. #7
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    Radio Shack has a simple 8 AA holder with a 9volt type connector at the end. $1.89

    http://www.radioshack.com/search/ind...%20Holder&sr=1

  8. #8
    Bandolero
    Reputation: notaknob's Avatar
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    Holdout light

    Here's a RS 4AA holder with two DIY Dinottes.

    Slow-core. -.. .-. .. -. -.- .... --- -- . -... .-. . .--

  9. #9
    Randomhead
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    The RS case looks nice, is it fairly water resistant? I'm not sure that really matters, but I'll probably get rained on at some point.

  10. #10
    Bandolero
    Reputation: notaknob's Avatar
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    Not at all

    Quote Originally Posted by unterhausen
    The RS case looks nice, is it fairly water resistant? I'm not sure that really matters, but I'll probably get rained on at some point.
    It's pretty open to the elements, but only costs $1.99 or so. I keep a baggy or ziplock in my camelbak so if it ever rains when I'm out, I could toss it into it. Of course if that happens where I night ride, I'll be screwed as just a little water on the dirt here (ABQ, NM) makes the trails unrideable.
    Slow-core. -.. .-. .. -. -.- .... --- -- . -... .-. . .--

  11. #11
    mtbr member
    Reputation: yetibetty's Avatar
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    There you go...
    Attached Images Attached Images

  12. #12
    I like bloody ankles
    Reputation: dsjc's Avatar
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    Next to a newly made Dinnotte style R2 driven at 950ma, this is my DIY battery pack which is adjustable to hold 1-5 cells along with a couple of extension cord options, with and without inline switch. The battery pack lives in my camelback, and in this picture is holding 2 protected 18650 cells.

    More info on the holder here

    https://forums.mtbr.com/lights-diy-do-yourself/diy-variable-voltage-18650-holder-517864.html


  13. #13
    mtbr member
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    Mirror finish

    Quote Originally Posted by yetibetty
    There you go...
    Man, nice light! I have a hard time keeping my polished alum staying like that ...you found success with it?

  14. #14
    Carbon8er
    Reputation: El34's Avatar
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    This is my 3x18650 pack.
    I also use 4x18650 packs


  15. #15
    mtbr member
    Reputation: yetibetty's Avatar
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    Quote Originally Posted by sdnative
    Man, nice light! I have a hard time keeping my polished alum staying like that ...you found success with it?
    Thanks, I made that light 2 years ago and it is well used.

    Ultra, ultra....ultra fine wire wool used with some washing up liquid BEFORE you polish.
    Seems to harden the surface.

  16. #16
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    Here is my 4 lithium ion pack 7.4V 5200mA dipped in plastic with a piece of old inner tube around.
    Totally watertight.battery pack.jpg

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