Abstract: A battery charger and associated method for charging a DC battery utilizes a step-down transformer with high leakage reactance, and means for rectifying and regulating the step-down transformer output to continuously supply a constant charging current to the battery. Feedback from a current sensing means in series with the battery is provided for determining proper regulation. A discharge current controller in parallel with the battery contains a load resistor and switching means electrically responsive to a pulse train generator. The discharge current is applied to the battery in a rapid succession of brief pulses throughout the entire charging cycle, with the discharge current pulses being superimposed over the charging current. The discharge current pulse duration is selected utilizing the pulse train generator, between 50 and 100 microseconds with a time period on the order of twenty times the pulse duration.