I have access to a 48 volt electric forklift for a very good deal, but it doesn't have batteries. I can't justify a new battery purchase as I could get a used propane forklift for that cost. My question is: can I use four deep cycle 4d batteries and have a usable forklift. The 4d batteries don't have an amp hour rating, but say they can run at 25 amps for 250 minutes, so I'm guessing that is something like 100 amp hours. So with four batteries, I get 48 volts, 100 amp hours. If I can get a half hour or hour out of a charge, that would be plenty for the work I'm doing. Would that work? Any thoughts?