Battery charger with protection circuitry

摘要

A battery charger for charging a battery pack, the charger comprising: a battery power source for sending power to the battery pack; a controller for controlling the battery power source, the controller causing the battery power source to provide power pulses at predetermined intervals; a power supply connectable to an outside power source, the power supply receiving a current and voltage from the outside power source for providing power to at least one of the controller and the battery power source; and a watchdog circuit for monitoring said power pulses and disabling at least one of the battery power source and the power supply if said power pulses are not received.