We'll, back in the day when gasoline was 15 cents a gallon we didn't have much money to gas let alone a car battery. I had a old Harley 45 trike. It had no charging system for battery, so after a period of time the battery would go dead. One day a fellow "shadetree" told me I could double my riding time by taking a regular 12 v battery, and cutting it in half, making two 6v batteries. The old batteries were made a little different on the top. Their were plates on top. This guy said after I get the battery cut in two, take a wood screw and screw it into one of the plates on top of the battery. This would make for another post, +&-. Well, I got the old wood saw out, cut the battery in two, and it worked!