The forklift battery was not included in the purchase - it was a 3000+ lb / 1361 kg monster pack that occupied the entire middle section of the forklift. The company probably kept it to either re-use in another lift truck or to sell to a recycler (the lead content is valuable).

We moved the forklift by putting three 12 volt marine batteries in the compartment and jumper cabling them together in series to make a tiny 36 volt pack. It was enough to turn the machine around and back it into the garage where it was disassembled.