Electronic device, and method controlling electronic power supply

A method of controlling an electronic power supply of an electronic device comprising a power circuit, an electric source controlling unit, and an interface, the method comprising:

• charging, by the power circuit, of a charging battery built within the electronic device, using a first amount of an electric power supplied by a connection line from which an electric power of a predetermined rating is supplied to the electronic device and via which the electronic device transmits and receives an information;
• performing, by the interface, using a second amount of the electric power supplied, a reading-and-writing operation of a recording medium recording an information;
• allocating, by the electronic source controlling unit, a portion of the first amount of the electric power supplied to the second amount of the electric power supplied when it is required based on the second amount of the electric power supplied;
• reducing, by the electric source controlling unit, an electric power required for operating the recording medium from the electric power supplied to the power circuit in a case where the recording medium is built within the electronic device and reducing, by the electric source controlling unit, a maximum value of the electric source of a standard of the recording medium from the electric power supplied to the power circuit in a case where the recording medium is capable of attaching to and detaching from the electronic device, when the interface performs the reading-and-writing operation of the recording medium recording the information according to an access request to the recording medium via the connection line;
• supplying, by the interface, an electric power to the recording medium;
• and
• turning off, by the electric source controlling unit, an electric source after a predetermined time has elapsed from a later time of a time when the charging has been completed by the power circuit or a time when the reading-and-writing operation has been completed by the interface after the charging has been completed.

An electric device comprising:

• a connecting unit connected to a connection line from which an electric power of a predetermined rating is supplied to the electronic device and via which the electronic device transmits and receives an information;
• a charging unit and an interface;
• an electronic source controlling unit performing a control such that:
• (i) a first amount of the electric power is supplied to the charging unit for charging of a charging battery that is built within the electronic device;
• (ii) while charging the charging battery, a second amount of the electric power is also supplied to the interface used for operation of a recording medium storing an information, wherein the interface is configured to perform a reading-and-writing operation of the recording medium;
• and
• (iii) the electronic source controlling unit reducing the electronic power being supplied to the charging unit for charging the charging battery based on the electric power required for performing the request for the reading-and-writing operation.