Converting MCE torch to battery pack - shorting problem?- Mtbr.com
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  1. #1
    aka Chris
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    Converting MCE torch to battery pack - shorting problem?

    I set about converting my MCE C2 torch to use Turboferret's dummy cell last night. I've got a couple of Tenergy 3.7v 6.6aH packs to go with it.

    I filled a hole in the torch body for wire access, looks a nice fit when closed up. Put my SuperSeal battery connectors on the dummy cell and pack - all works nicely.

    However, if I screw the switch cap on properly something is (I think) shorting as the torch goes off. Leave the cap loose (maybe 75% tight) and it works fine.

    If I go back to using a single 18650 cell inside the torch, screwing down the switch cap either cuts the brightness of the beam or it goes off. Is that shorting again?

    But where?
    The Novice's LED Light Building Blog

  2. #2
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    It may not be shorting out it may be breaking the connection when you tighten it up
    are the threads anodised check the tailcap has a good metat to metal contact with the housing and as I am not familar with the construction also check whatever makes contact with the battery or dummy

  3. #3
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    Could it be missing an O-ring? I read that a lot of these torches have missing O-rings.
    If there isn't one between body and tailcap it could allow it to be done up further than it was meant to.

    Just a quess as I have never actually seen one of these torches.

  4. #4
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    Reputation: HEY HEY ITS HENDO's Avatar
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    is there a spring contact in the head and tailcap?

    EDIT...taken from customer reviews ...

    After really tightening the switch retainer, it works very well...
    -Light was carelessly assembled. Both the pill and the switch were not screwed in tightly.
    Emitter was loose enough to cause problems, such as a high-pitched noise, and flickering output.
    Last edited by HEY HEY ITS HENDO; 08-01-2009 at 01:44 PM.
    ...Scun.thorpe, UK

  5. #5
    aka Chris
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    Cheers guys.

    I did remove an o-ring whilst making the cable "gully" and I'm not sure if I put it back on.
    The Novice's LED Light Building Blog

  6. #6
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    my money is on loose (or/and poor) switch parts
    ...Scun.thorpe, UK

  7. #7
    aka Chris
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    Not quite sure how I dismantle the switch but as the torch is my backup light for Sleepless in the Saddle this weekend, I think I'll put up with it not going 100% tight till next week.
    The Novice's LED Light Building Blog

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