One of my brothers started an "Auto Battery Reconditioning" business in Chgo in the early 70's.

He got FREE batteries from other businesses....cleaned them up, recharged them and sold them. He had 2 employees. Made enough to start his own Auto Parts biz. Made enough to buy an apartment bldg...then 2....then 3.

Retired now.

In my opinion, this biz could still be activated today. It's a dirty biz but I'll bet you could get used batteries for next to nothing or even free.

All depends on HOW MUCH you can get nowadays for "Reconditioned Batteries". Some big cities should have one or 2 of these shops.

Ya never know unless ya try.

Don Alm