A charging system, including: a first circuit (206, 306) connected to a first power supply; a first coil of an isolation transformer connected with its two terminals to the first circuit (206, 306); a second coil of the isolation transformer having two terminals and to be magnetically coupled to the first coil; a second circuit (207, 307) adapted to supply electrical power, which is supplied to the second coil, in order to charge one of a secondary cell and a capacitor; a third circuit (208, 308) connected to a second power supply; and a third coil, which is supplied with electrical power from the second power supply via the third circuit (208, 308), a relative position of which to the second coil is variable, and which can be magnetically coupled to the second coil when the second coil approaches to the third coil, wherein in a case of charging one of the secondary cell and the capacitor by the first power supply, the charging power is supplied from the first circuit (206, 306) to one of the secondary cell and the capacitor via the first coil and the second coil and the second circuit (207, 307), and in a case of charging one of the secondary cell and the capacitor by the second power supply, the charging power is supplied from the third circuit (208, 308) to one of the secondary cell and the capacitor via the third coil and the second coil and the second circuit (207, 307), characterized by including: two switches (SW13, SW14), each disposed between the first circuit (207, 307) and one of the two terminals of the first coil, respectively, and adapted to separate the first coil from the first circuit (206, 306) and connect the two terminals of the first coil to the two terminals of the second coil, respectively, wherein the second power supply and the third coil are part of a contactless charging circuit, and in a case of charging the secondary cell by said second power supply and said third coil, the first coil and the second coil are connected in parallel to each other using the switches (SW13, SW14). a first circuit (206, 306) connected to a first power supply; a first coil of an isolation transformer connected with its two terminals to the first circuit (206, 306); a second coil of the isolation transformer having two terminals and to be magnetically coupled to the first coil; a second circuit (207, 307) adapted to supply electrical power, which is supplied to the second coil, in order to charge one of a secondary cell and a capacitor; a third circuit (208, 308) connected to a second power supply; and a third coil, which is supplied with electrical power from the second power supply via the third circuit (208, 308), a relative position of which to the second coil is variable, and which can be magnetically coupled to the second coil when the second coil approaches to the third coil, wherein in a case of charging one of the secondary cell and the capacitor by the first power supply, the charging power is supplied from the first circuit (206, 306) to one of the secondary cell and the capacitor via the first coil and the second coil and the second circuit (207, 307), and in a case of charging one of the secondary cell and the capacitor by the second power supply, the charging power is supplied from the third circuit (208, 308) to one of the secondary cell and the capacitor via the third coil and the second coil and the second circuit (207, 307), two switches (SW13, SW14), each disposed between the first circuit (207, 307) and one of the two terminals of the first coil, respectively, and adapted to separate the first coil from the first circuit (206, 306) and connect the two terminals of the first coil to the two terminals of the second coil, respectively, wherein the second power supply and the third coil are part of a contactless charging circuit, and in a case of charging the secondary cell by said second power supply and said third coil, the first coil and the second coil are connected in parallel to each other using the switches (SW13, SW14).