POWER SUPPLY SYSTEM

A power supply system includes a battery, a charger that converts a voltage of power input from an external power supply through a charging port into a voltage required for charge of the battery and an intra-system power supply device that is connected between the charging port and the charger. The power supply device is provided with a voltage converter that converts a voltage of output power of the power supply device into a voltage corresponding to the voltage of the external power supply.