Patent ID: 8406824

Claim:
A wireless communication apparatus comprising: a power-supply apparatus configured to supply electric power to a load that is intermittently operated by using a battery as a power supply; and control means for controlling the power-supply apparatus, wherein the power-supply apparatus includes a capacitor; switching means capable of selectively forming a first path through which charging is performed from the battery to the capacitor and a second path through which the battery is connected in series with the capacitor; and a zener diode connected in parallel to the capacitor, the zener diode having an anode connected to the first path and a cathode connected to the second path, wherein the control means controls the switching means so that the first path is formed during a period in which the load is idle and the second path is formed during a period in which the load is not idle, and therein supplies the voltage of the sum of the battery voltage and the charged voltage of the capacitor in a non-idle period.