Constant Current Charging
Constant current most convenient for charging batteries outside charging is the airplane because several batteries of varying voltages may be charged at once on the same system. A constant current charging system usually consists of a rectifier to change the normal transformer is used to reduce the available 110 AC supply to volt desired level before it is passed through the rectifier f a or 220- volt C supply to the be connected in constant current charging system is used, multiple batteries may does series, provided that the current is kept at such a level that the battery charging not overheat or gas excessively.