Abstract: In a battery charger cradle, a battery incorporated in a battery built-in device is charged by electric power induced to an induction coil. The cradle includes a primary coil for inducing electromotive force to the induction coil, a casing having a top plate atop of which the battery built-in device is placed, a movement mechanism for moving the primary coil along an inner surface of the top plate, and a position detection controller for detecting a position of the battery built-in device placed on the top plate and controlling the movement mechanism to bring the primary coil closer to the induction coil in the battery built-in device. When the battery built-in device is placed on the top plate, the position detection controller detects the position of the battery built-in device, and the movement mechanism moves the primary coil closer to the induction coil in the battery built-in device.

Abstract: The charging pad (10) is provided with a position detection controller (14) that supplies position detection signals to position detection coils (30), and detects induction coil (51) position from echo signals output from the induction coil (51). The device housing a battery (50) is provided with a series capacitor (55) connected in series with the induction coil (51), a parallel capacitor (56) connected in parallel with the induction coil (51), and a switching circuit (57). When the position detection controller (14) is issuing position detection signals, the parallel capacitor (56) is connected to the induction coil (51). When power is transmitted from the power supply coil (11) to the induction coil (51), the parallel capacitor (56) is not connected to the induction coil (51) and induction coil (51) AC is output to a rectifying circuit (53) through the series capacitor (55).

Abstract: In a battery charger cradle, a battery incorporated in a battery built-in device is charged by electric power induced to an induction coil. The cradle includes a primary coil for inducing electromotive force to the induction coil, a casing having a top plate atop of which the battery built-in device is placed, a movement mechanism for moving the primary coil along an inner surface of the top plate, and a position detection controller for detecting a position of the battery built-in device placed on the top plate and controlling the movement mechanism to bring the primary coil closer to the induction coil in the battery built-in device. When the battery built-in device is placed on the top plate, the position detection controller detects the position of the battery built-in device, and the movement mechanism moves the primary coil closer to the induction coil in the battery built-in device.

Abstract: The casing 2 has a planar bottom plate 22, a top plate 21 disposed opposite and separated from the bottom plate 22, and perimeter walls 23 that establish an enclosed storage space 25. The internal battery 1, the receiving coil 5, and the circuit board 4 are disposed in the storage space 25. The internal battery 1 is circular cylindrical batteries 1A disposed parallel to the bottom plate 22 along the inside surfaces of perimeter side-walls 23A. The receiving coil 5 is a planar coil disposed on the inside surface of the bottom plate 22 at the bottom of the storage space 25. The circuit board 4 is disposed inside the top plate 21 separated from the receiving coil 5, and a heat dissipating region 26 is established in the space surrounded by the circuit board 4, the receiving coil 5, and the internal battery 1.

Abstract: A pocketable body warmer includes: a metallic exterior casing with a metal plate being formed in the shape of a tube having a closed bottom end and an open opposite end; and a plastic interior casing with an outer contour being formed to be inserted in the metallic exterior casing. The interior casing is provided with a battery storage portion and a battery is loaded in the battery storage portion. Also, a heater is thermally connected to the metallic exterior casing for heating the metallic exterior casing.

Abstract: The charging pad 10 is provided with a position detection controller 14 that supplies position detection signals to position detection coils 30, and detects induction coil 51 position from echo signals output from the induction coil 51. The device housing a battery 50 is provided with a series capacitor 55 connected in series with the induction coil 51, a parallel capacitor 56 connected in parallel with the induction coil 51, and a switching circuit 57. When the position detection controller 14 is issuing position detection signals, the parallel capacitor 56 is connected to the induction coil 51. When power is transmitted from the power supply coil 11 to the induction coil 51, the parallel capacitor 56 is not connected to the induction coil 51 and induction coil 51 AC is output to a rectifying circuit 53 through the series capacitor 55.

Abstract: The battery charger has a case 1 that has a battery compartment 2 to load a plurality of rechargeable circular cylindrical batteries 3 arranged in parallel orientation in a detachable manner, a charging circuit 10 housed in the case 1 to charge the batteries loaded in the battery compartment 2, and a charging status indicator 4 that detects the charging status of batteries loaded in the battery compartment 2 and indicates the battery charging status by light illumination conditions. The indicator 4 is provided with light sources 6 disposed at the end of the battery compartment 2 that shine light from between adjacent parallel circular cylindrical batteries 3 in the lengthwise direction onto the battery surfaces. These battery charger light sources 6 shine light on the surfaces of adjacent circular cylindrical batteries 3 to indicate the charging status of the circular cylindrical batteries 3 loaded in the battery compartment 2.

Abstract: A charger includes a case 20, a power coil 11, an actuator 13, and a power circuit. The case 20 has a charging surface 21 in the case upper surface. The charging surface can receive and charge a battery pack or a battery-driven device 50. The power coil 11 is accommodated in the case 20 and can be electromagnetically connected to a circular inducing coil 51 included in the battery pack when the charging surface receives the battery pack. The power coil is orientated under the charging surface 21 to be opposed to the inducing coil 51. The actuator 13 moves the power coil 11 in the range of the charging surface 21 only in one direction. The circuit supplies power to the power coil 11. The power coil 11 has an ellipse shape. The major axis of the ellipse shape intersects the movable direction of the actuator 13.

Abstract: A battery pack rechargeable by a magnetic induction effect incorporates a secondary coil electromagnetically coupled to a primary coil of a battery charger and a secondary battery rechargeable by electric power induced to the secondary coil. The secondary battery is in a form of a thin battery having a larger width than a thickness, and two opposing surfaces of the secondary battery are composed of a first flat surface and a second flat surface. The secondary coil is in a form of a planar coil with a wire material being spirally coiled in the plane. In the battery pack, the secondary coil in the form of the planar coil is fixedly layered on the first flat surface of the thin battery.

Abstract: The portable light is provided with an outer case 1, batteries 4 that can be charged and are housed inside the outer case 1, a solar panel 2 that charges the batteries 4, and a light source 3 illuminated by power from the batteries 4. The outer case 1 is provided with a flat-panel section 5 that contains the solar panel 2 and light source 3; and a battery compartment 6 that is thicker than the flat-panel section 5, is established protruding outward from the bottom edge of a flat-panel section 5 surface, and has a bottom standing surface 7 that enables the flat-panel section 5 to stand upright on its own.

Abstract: A battery pack rechargeable by a magnetic induction effect incorporates a secondary coil electromagnetically coupled to a primary coil of a battery charger and a secondary battery rechargeable by electric power induced to the secondary coil. The secondary battery is in a form of a thin battery having a larger width than a thickness, and two opposing surfaces of the secondary battery are composed of a first flat surface and a second flat surface. The secondary coil is in a form of a planar coil with a wire material being spirally coiled in the plane. In the battery pack, the secondary coil in the form of the planar coil is fixedly layered on the first flat surface of the thin battery.

Abstract: A charging pad 10 is provided with a power supply coil 11, and a device housing a battery 50 containing an induction coil 51. A device housing a battery 50 is provided with a rectifying circuit 53 that rectifies AC power induced in the induction coil 51, a charging circuit 54 that charges the internal battery 52 with output from the rectifying circuit 53, a shorting circuit 56 that short circuits the terminals of the induction coil 51, and a control circuit 57 that controls the shorting circuit 56 ON when a charging abnormality is detected. If the control circuit 57 detects a charging abnormality during power transmission from the charging pad 10 power supply coil 11 to the device housing a battery 50 induction coil 51, it controls the shorting circuit 56 ON to cut-off the supply of power from the induction coil 51 to the rectifying circuit 53.

Abstract: A charging base for charging a mobile device includes an induction coil and a battery pack. The pack includes a battery charged by the induction coil. The base includes a base case, a mount portion, a power supply coil, and a power supply. The mount portion is recessed on the surface of the case, and can detachably hold the device. The power supply coil is arranged in proximity to and inside the recessed bottom surface of the mount portion to be electromagnetically coupled to the induction coil, and connected to the power supply coil. A cut-out portion is formed in a surface of the mount portion by partially cutting out the case to communicate with the outside. This surface intersects a mount surface of the device.

Abstract: The battery charger has a case 1 that has a battery compartment 2 to load a plurality of rechargeable circular cylindrical batteries 3 arranged in parallel orientation in a detachable manner, a charging circuit 10 housed in the case 1 to charge the batteries loaded in the battery compartment 2, and a charging status indicator 4 that detects the charging status of batteries loaded in the battery compartment 2 and indicates the battery charging status by light illumination conditions. The indicator 4 is provided with light sources 6 disposed at the end of the battery compartment 2 that shine light from between adjacent parallel circular cylindrical batteries 3 in the lengthwise direction onto the battery surfaces. These battery charger light sources 6 shine light on the surfaces of adjacent circular cylindrical batteries 3 to indicate the charging status of the circular cylindrical batteries 3 loaded in the battery compartment 2.

Abstract: A device housing a battery 50 includes a receiving coil 51, and a charging pad 10 includes a transmitting coil 11 that magnetically couples with, and supplies charging power to the receiving coil 51. The device further includes a modulator circuit 61 that changes the impedance of the receiving coil according to internal battery 52 data. The charging pad further includes a detection circuit 17 that detects receiving coil impedance changes to detect the battery data. The modulator circuit 61 has a load circuit 62 that is connected in parallel with the receiving coil 51 and has a series-connected switching device 64 and impedance modulating capacitor 63, and a control circuit 65 that switches the load circuit 62 switching device 64 ON and OFF according to the battery data. The modulator circuit 61 switches the switching device 64 ON and OFF to transmit battery data to the charging pad 10.

Abstract: The battery charging pad comprises a moving mechanism 13 that moves the transmitting coil 11, and a position detection controller 14 that detects the position of a device housing a battery 50 and controls the moving mechanism to move the transmitting coil in close proximity to a receiving coil 51. Pulse signals are supplied to a plurality of position detection coils 30 from a pulse generator 31, and the echo signals are a result of coil excitation by the pulse signals. The battery charging pad position detection controller 14 detects the position of the receiving coil 51 and moves the transmitting coil 11 in close proximity to the receiving coil 51, and the position detection controller 14 detects the position of the transmitting coil 11 and moves the transmitting coil 11 to the reference position, or it moves the transmitting coil 11 in close proximity to the receiving coil 51.

Abstract: Mobile electronic equipment incorporating an induction coil and a battery; and a battery charger cradle for recharging the battery in the mobile electronic equipment. Regarding the charger cradle, a bottom surface of a mounting portion is curved in a U-grooved shape, and a primary coil is incorporated inside the U-grooved bottom surface, with the primary coil being connected to a power source. Regarding the mobile equipment, its rear surface placed on the mounting portion of the charger cradle is curved to match with the U-grooved bottom surface, and the induction coil is incorporated inside the curved rear surface. When the mobile equipment is placed on the mounting portion of the charger cradle, the electric power is carried from the primary coil to the induction coil which are electromagnetically coupled with each other, and the battery in the mobile equipment is recharged by the electric power induced to the induction coil.

Abstract: The charging pad 10 is provided with a position detection controller 14 that supplies position detection signals to position detection coils 30, and detects induction coil 51 position from echo signals output from the induction coil 51. The device housing a battery 50 is provided with a series capacitor 55 connected in series with the induction coil 51, a parallel capacitor 56 connected in parallel with the induction coil 51, and a switching circuit 57. When the position detection controller 14 is issuing position detection signals, the parallel capacitor 56 is connected to the induction coil 51. When power is transmitted from the power supply coil 11 to the induction coil 51, the parallel capacitor 56 is not connected to the induction coil 51 and induction coil 51 AC is output to a rectifying circuit 53 through the series capacitor 55.

Abstract: A battery charger includes a first charging circuit controlling input power to charge an external battery detachably mounted to the charger; an internal secondary battery charged by the input power; a charge/discharge control circuit for charging the internal battery by the input power and controlling a charge of the internal battery; and a control circuit for controlling an operative state of the first charging circuit and the charge/discharge control circuit. The charger serves to charge the detachably mounted external battery both by the input power and by the power from the internal battery. The charger is so structured that when the input power is not in an inputted state, the control circuit supplies the electric power from the internal battery to the charge/discharge control circuit where an operative state of the internal battery is controlled, thus discharging the internal battery to charge the external battery.

Abstract: A battery charger has a housing with a battery containing portion in which a rechargeable battery is detachably contained, a connector attached to the end of a power cord led out from the housing, and a charging source that is installed in the housing and charges the rechargeable battery contained in the battery containing portion with power supplied through the connector, and the housing is provided in its outer circumferential wall with a gutter-like cord recess in which the power cord is stored along the outer circumferential wall, and also with a connector holder that detachably holds the connector.