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Thread: Battery crud

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    Battery crud

    When flashlight-type batteries leak, they leave a white crud that often makes a device useless.

    I have such a device that appears to be restorable if only I knew how to safely remove the crud.

    A common enough problem, I think, but does anyone know the cure?

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    Super Moderator RetiredGeek's Avatar
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    D.B.,

    Baking soda, water, old toothbrush. HTH
    May the Forces of good computing be with you!

    RG

    PowerShell & VBA Rule!

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    The stuff that's leaking out is acidic, so you need something alkaline to counter it. Hence the suggestion (from RG above) of using baking soda. Be sure to remove all liquid residue.

    After cleaning, you can improve the contact on metal using a pencil eraser. If that's not enough, some fine emery paper can be used.
    Graham Smith
    DataSmith, Delaware
    "For every expert there is an equal and opposite expert.", Arthur C. Clarke (1917 - 2008)

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    WS Lounge VIP Calimanco's Avatar
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    "The stuff that's leaking out is acidic" unless its from an alkaline battery (potassium hydroxide), in which case vinegar (acetic acid) should do the job. If you're not sure which type it is, get some Litmus test strips from your local pharmacy. Red-acid Blue-alkaline.

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    Quote Originally Posted by Calimanco View Post
    "The stuff that's leaking out is acidic" unless its from an alkaline battery (potassium hydroxide), in which case vinegar (acetic acid) should do the job. If you're not sure which type it is, get some Litmus test strips from your local pharmacy. Red-acid Blue-alkaline.
    Oops, you are right.
    Graham Smith
    DataSmith, Delaware
    "For every expert there is an equal and opposite expert.", Arthur C. Clarke (1917 - 2008)

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    The litmus test is something I have not performed in well over half a century, and I was delighted to read the opinions in all of the posts so far. I delved in the garbage for the answer, and I can definitively report (OEM) ‘alkaline’.

    The seven percent solution – of what remains to be seen, but nothing too strong – applied with Q-tips (cotton swabs) strikes me as best, because I want to dissolve the crud without damaging what remains of the contacts, which may be silver-plated.

    The device is a Logitech Wireless Touchpad (two AA cells), which was an experiment that I abandoned almost as soon as I had it, but I ran across it recently and considered trying it again for the fun of it. (If it’s fun, and potentially profit, you want from a computer input device, consider a (Wacom) tablet – at the entry level the thing often pays for itself thanks to the bundled software, and I think children (grandchildren, etc.) get a kick out of it, especially if they learn how to use it. If they’re artistic the sky’s the limit.)

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