An automotive or vehicle battery charger is considered as a rechargeable battery that gives power to any automobile. This is what we call SLI or starting lighting ignition which serves as a starter for the engine. This battery is a lead acid type that is composed of galvanic cells that provides the volt system. Each of these cells have 2.1 volts and when fully charged 12.6 volts in total.
Heavy equipments such as tractors and trucks with diesel engines have two batteries which are composed of 24 volts system. These automotive batteries are recycled instead of throwing it away. Manufacturers are doing this to prevent improper disposal of hazardous waste.
In changing the batteries, you need to disconnect the negative connection first to avoid short circuits and when connecting the new one start with the positive cable. Proper safety should be observed to avoid accidents when changing and charging batteries. More information are provided by clicking this webpage.