How to charge an 8v tractor battery.

http://www.tractorsupply.com/tracto...eries/heavy-duty-farm-battery-8v-0470580

Maybe someone can name a model of tractor (or golf cart) that came (stock) with an 8v battery. An Internet search gives back many results for 8v batteries being a common after-market "upgrade". Ford 2N, 9N, and 12N tractors came with 6v batteries.

8v batteries have been used for many decades as a "shade tree" solution for hard starting 6v vehicles (in 6v cars, trucks, tractors, golf carts). In these cases, the 8v battery was usually a cost-saving technique (actually, it was an avoidance technique in solving the causes(s) of the starting problem).