Abstract: Disclosed is a DC power apparatus using capacitors. A first capacitor is connected to one end of a battery having another end grounded. A charge controller detects the voltage at another end of the first capacitor, and when the detected voltage is at a low level, it performs a magnetic oscillation to charge the DC voltage of the battery into a built-in second capacitor. It transfers the energy charged to the second capacitor to the first capacitor according to a predetermined switching operation, and when the detected voltage is at a high level, stops the magnetic oscillation. The capacitor is connected to the battery in series, and the charged voltage at the capacitor is checked, and the charge controller then oscillates according to the result of the check so that a DC voltage greater than the voltage supplied by the battery can be supplied.