A power receiving apparatus , comprising: a resonance element having a specific resonance frequency and adapted to couple in a non-contacting relationship to a power transmitting apparatus through a resonance relationship; rectification means configured to rectify alternating current of the resonance frequency in response to energy received by said resonance element ; a switching means; a radio communication section adapted to communicate with the power transmitting apparatus ; a battery ; a charging circuit adapted to charge the battery with direct current from the rectification means; and a control section ; characterized in that the switching means is a change-over switch provided between one of the terminals of the resonance element and one of the input terminals of the rectification means and adapted to cut off a power supply connection between said one of the terminals of the resonance element and said one of the input terminals of the rectification means, and when cutting off said power supply connection, further adapted to connect the terminals of the resonance element together to form a loop coil; the control section is configured to transmit a residual charging amount of the battery to the power transmitting apparatus through the radio communication section ; wherein the power receiving apparatus is configured to execute an operation to place said change-over switch either into the power supply connection state or the loop coil state in response to a controlling instruction from the power transmitting apparatus, said controlling instruction produced by the power transmitting apparatus in accordance with a charging schedule plan, which is produced or modified by the power transmitting apparatus in response to the received residual charging amount. a resonance element having a specific resonance frequency and adapted to couple in a non-contacting relationship to a power transmitting apparatus through a resonance relationship; rectification means configured to rectify alternating current of the resonance frequency in response to energy received by said resonance element ; a switching means; a radio communication section adapted to communicate with the power transmitting apparatus ; a battery ; a charging circuit adapted to charge the battery with direct current from the rectification means; and a control section ; characterized in that the switching means is a change-over switch provided between one of the terminals of the resonance element and one of the input terminals of the rectification means and adapted to cut off a power supply connection between said one of the terminals of the resonance element and said one of the input terminals of the rectification means, and when cutting off said power supply connection, further adapted to connect the terminals of the resonance element together to form a loop coil; the control section is configured to transmit a residual charging amount of the battery to the power transmitting apparatus through the radio communication section ; wherein the power receiving apparatus is configured to execute an operation to place said change-over switch either into the power supply connection state or the loop coil state in response to a controlling instruction from the power transmitting apparatus, said controlling instruction produced by the power transmitting apparatus in accordance with a charging schedule plan, which is produced or modified by the power transmitting apparatus in response to the received residual charging amount. <EOS>