Patent ID: 8390258

Claim:
A discharger comprising: step-down means including at least a switching element provided between a DC power supply and an output to a load; control means for controlling an output voltage to the load by controlling the switching element, and if a predetermined condition holds, stopping power output to the load by setting the switching element to an open state, wherein said control means includes means for i) determining that the predetermined condition holds, when detecting that an input voltage from the DC power supply is less than or equal to a predetermined first set value, and ii) resuming power output to the load by setting the switching element to one of being activated into its switching operation to drop a voltage input thereto from a DC power supply to a desired voltage to be output to a load and being in a short-circuited state when detecting an input voltage from the DC power supply is equal to or greater than a second set value which is larger than the first set value after the input voltage from the DC power supply has become less than or equal to the first set value and the switching element has been set to the open state, further comprising a manual switch which when operated by a user to an on position, supplies power from an input side of the discharger to said control means, and when operated by said user to an off position, power to said control means is supplied to said control means only from an output side of the discharger.