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I've aquired two shopping carts full of old ni-cad rechargable batteries for cordless tools. I was hoping to sell them to a company that rebuilds tool batteries, but no one I've talked to is currently buying. Anyone know a company that buys old batteries and rebuilds them?

Most of the consumer level rechargeable power tool batteries are not worth rebuilding, but some of the more expensive commercial ones are.

I don't know any companies that rebuild those types of cells.

If you can't find an oulet, I buy them as scrap for $0.60/lb.

Dewalt and Milwaukee tool batteries are usually worth rebuilding. Ends up being about $45 per battery instead of $85. I've had some Milwaukee ones rebuilt and they work great.

I might take you up on your offer. Thank you.

Another option: if you have the time and don't have a lot invested in these, there are several DIY guides online for how to "revive" NiCd and NiMH batteries with a welder or DC adapter. I don't know how accurate they are, but it could be worth experimenting. Note the potential dangers involved: electrocution, fire, small explosions.

At the very least, you could try self-refurbished ones in your own tools.

If you can't find an oulet, I buy them as scrap for $0.60/lb.

Are these batteries purchased by most yards, or is this a more specialized market?
and, what gets done with them?
thanks!

No, it's a very specialized market.

They get recycled and the recovered material goes into new batteries.

Nickel spot has the biggest impact on price, so you could always hoard them. It's easier to hoard coins and other forms of bullion or scrap, though.