the transportation, storage and charging may put this outside of profitability.
They already need to provide the transportation from the job site to the recycle site.
Transportation from their facility to a customer would be paid by the buyer.
So, their transportation costs may actually become less, depending on locations.
The fast return issue would certainly play into this if they were only making a few extra pennies per pound.
I have no idea how fast the turn around might be, or the value of used batteries, but if it was a 10-20% higher profit, it might pay off. They might even get some good PR if they were actually putting these to good use, rather than just melting them down.
I guess that the big question would be "What is the market (in this region) for reclaimed batteries?"
It could be a bonanza, or it could end up being an overall loss.
Certainly worth looking into with that volume of a valuable resource.
Is there a battery distributor in the region who might be interested in dealing with used batteries?
Depending on distances and prices, it could be more profitable than just scrapping them.