I wouldn't try & scrap them myself, too much work & hazardous waste leftover.
Sell them by the Lb to a
Scrap metal dealer.
To break them down yourself..
First, you have to deal with the sulfuric acid.
They, remove, filter, electroplate metals out of it, concentrate it & reuse.
Plastic cases, gotta be cleaned & they are covered with acid & oil & dirt & then disposed of.
They crush, remove, wash, recycle.
Lead, you make a kiln, use energy, melt lead, remove dross, sell contaminated lead & now have to dispose of the plastic & dangerous lead dross & inhale lead fumes as well.
They, enviro friendly, clean lead off the plastic dividers, melt lead & ingot it, they remove dross & turn it back into solid lead & check all lead for Cadmium etc content & sell it right back to the battery manufacturers.
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