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Thread: Motorola Saber Battery Plastic what is it?

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    Default Motorola Saber Battery Plastic what is it?

    Does anyone recall the type of plastic used by Motorola for their Sabers, specifically the batteries?

    I just sawed apart a short battery to try some 18500 lithium ion inserts and it was a previously repacked battery and Primecell (Cunard) used some sort of glue that was effective in welding and filling the previous saw cut. I want to find what kind of plastic and what glue works with it.


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    From a Motorola battery white paper:

    "For battery casings, Motorola uses tough polycarbonate plastic, which has significantly more tensile
    strength (the ability to resist lateral forces) and flexural strength (the ability to withstand flexing or
    bending) than ABS plastic."

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    I thought they had a name for it like Makrolon or similar.

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    I think at one time they advertised housings & batteries used Lexan. Makrolon and Lexan are nearly identical polycarbonates (PC) & should have similar compatibility with adhesives or epoxies rated for PC.

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    Does Makroblend sound familiar?

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    Makroblend is a PC/PET or PC/PBT blend. I don't have any first hand knowledge of this product, but looking at the spec sheet it shows adhesives suitable for Makrolon PC are also suitable for Makroblends.

    If the battery case is just PC you could try solvent welding with methylene chloride, the finished joint will be nearly as strong as the parent material. If you have a gap to fill some fabricators will dissolve a few % of PC sawdust or shavings into the methylene to aid in filling gaps.
    Last edited by kf8yk; 4 Days Ago at 03:31 AM.

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    Quote Originally Posted by kf8yk View Post
    Makroblend is a PC/PET or PC/PBT blend. I don't have any first hand knowledge of this product, but looking at the spec sheet it shows adhesives suitable for Makrolon PC are also suitable for Makroblends.

    If the battery case is just PC you could try solvent welding with methylene chloride, the finished joint will be nearly as strong as the parent material. If you have a gap to fill some fabricators will dissolve a few % of PC sawdust or shavings into the methylene to aid in filling gaps.
    Looks like that is the way to go. Thanks; I will look for some methylene chloride and save the shavings.

    Makrolon is dissolved by:
    Chloroform
    Cresol
    Dioxane
    Ethylene Dichloride
    Methylene Chloride
    Pyridine

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