Patent ID: 7240226

Claim:
An electronic apparatus comprising: a connector configured to connect an AC adapter to the electronic apparatus; a power supply controlling unit configured to control supplying of power from the AC adapter to a system of the electronic apparatus, to thereby prevent an amount of current from the AC adapter, which is supplied through the connector, from exceeding a maximum rated current amount of the AC adapter; a system configuration determining unit configured to determine a configuration of the system with the system configuration determining unit and the AC adapter setting unit are operated at time of starting the system; and an AC adapter setting unit configured to temporarily select a temporary AC adapter whose maximum rated current amount is the smallest, and cause the power supply controlling unit to perform current control in accordance with a maximum rated current of the selected AC adapter, and then to judge by estimation a kind of the AC adapter connected to the electronic apparatus by the connector based on a result of determination by the system configuration determining unit, and cause the power supply controlling unit to perform current control in accordance with a maximum rated current of the judged AC adapter.