Abstract: An object of the present invention is to provide an electronic device capable of receiving payment of a charge required for a charging process even though a secondary battery of the electronic device ran into an overdischarge state and also extricating itself from the overdischarge state, and a charger used for the same. A charger (3) executes a power transmission before it conducts a proximity noncontact communication with an electronic device (2), continues this power transmission until a preliminary charging stop notification signal is sent from the electronic device (2), and conducts the proximity noncontact communication regarding to a billing process with the electronic device (2) when the preliminary charging stop notification signal is sent. After the communication regarding to the billing process is ended, the charger (3) gives a charge of electricity to the electronic device (2) again.

Abstract: An object of the present invention is to provide an electronic device which is capable of conducting a proximity noncontact communication even if charging of a secondary battery is not fully completed and also whose secondary battery never falls into an overdischarge state during the proximity noncontact communication. An electronic device (2) employs a secondary battery (28), which is rechargeable by a charger (3) that gives a charge of electricity in a noncontact manner, as a power source, and is capable of conducting a proximity noncontact communication with the charger (3).

Abstract: An electronic apparatus includes a housing having a predetermined face; a power receiver that receives electric power in a contactless manner by way of the predetermined face; a secondary battery that is charged by electric power received by the power receiver; a front-back detection unit that detects whether or not the predetermined face faces a charger; and an alarm unit that notifies that the predetermined face is situated at a position inappropriate for charging when the front-back detection unit detects that the predetermined face does not face the charger.

Abstract: An electronic apparatus includes a housing having a predetermined face; a power receiver that receives electric power in a contactless manner by way of the predetermined face; a secondary battery that is charged by electric power received by the power receiver; a front-back detection unit that detects whether or not the predetermined face faces a charger; and an alarm unit that notifies that the predetermined face is situated at a position inappropriate for charging when the front-back detection unit detects that the predetermined face does not face the charger.

Abstract: An object of the present invention is to provide an electronic device which is capable of conducting a proximity noncontact communication even if charging of a secondary battery is not fully completed and also whose secondary battery never falls into an overdischarge state during the proximity noncontact communication. An electronic device (2) employs a secondary battery (28), which is rechargeable by a charger (3) that gives a charge of electricity in a noncontact manner, as a power source, and is capable of conducting a proximity noncontact communication with the charger (3).

Abstract: An object of the present invention is to provide an electronic device capable of receiving payment of a charge required for a charging process even though a secondary battery of the electronic device ran into an overdischarge state and also extricating itself from the overdischarge state, and a charger used for the same. A charger (3) executes a power transmission before it conducts a proximity noncontact communication with an electronic device (2), continues this power transmission until a preliminary charging stop notification signal is sent from the electronic device (2), and conducts the proximity noncontact communication regarding to a billing process with the electronic device (2) when the preliminary charging stop notification signal is sent. After the communication regarding to the billing process is ended, the charger (3) gives a charge of electricity to the electronic device (2) again.

Abstract: There is provided an electronic device for enabling the user to recognize the relative position of the electronic device to a power supply device such as a charger. An electronic device 11B includes a main coil 18 having a conductor wire wound around a main point 33 for receiving power for charging a secondary battery from a charger 12, a position detection coil 31 placed at a first point in the electronic device 11B, a position detection coil 32 placed at a second point in the electronic device 11B, and a position shift display section 39.