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[–] 2 pts

Cool invention in the link. It uses the most common elements on Earth. No rare earth bullshit.

I don't think it has a positive energy output, though. Probably not even better than electrolysis when all inputs are considered. Ferrosilicon is made in arc furnaces that use a fuckload of electricity and I suppose it is spent in the process.

Still, nice battery. Beats carrying a Hindenburg in your trunk