Something is not right here. I have to assume these are used carts. You should be able to determine their age by the serial number. I'm thinking that if the chargers are 48 volts and the charging ports match the charger cable, there darned well should be 6 8V batteries! I don't know the current prices of the batteries, but I'm guessing the 6 volt ones are cheaper. Sounds to me like the dealers 'pulled a fast one'.