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Laptop Plug Possibilities

I am curious if anyone here has made an car power inverter out of an old laptop battery. I am so sure with some modifications that it could be done. I know that the components are in the right place but not the right order. If it's possible I would love some direction. how about some other ideas for the old plugs. i have several i used to do computer repairs and occasionally i get an old laptop someone thrashed to pieces and have left overs i would love to have a use for the plugs.

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