A wireless charging device includes a casing, a transmitter driving board and a transmitter coil assembly. The wireless charging device is used for charging a receiver coil of a mobile device. The transmitter driving board generates a first heat source. The transmitter driving board has a first thermal resistance. The transmitter coil assembly generates a second heat source. The transmitter coil assembly has a second thermal resistance. There is an interfacial thermal resistance between the transmitter coil assembly and the transmitter driving board. A product of a power dissipation of the second heat source and the second thermal resistance is lower than 15. The interfacial thermal resistance is higher than or equal to two times the first thermal resistance. A product of a power dissipation of the first heat source and the first thermal resistance is lower than or equal to 80.

Described are aircraft passenger seat assemblies with a passenger seat, a component with an outer surface attached the passenger seat. An inductive wireless power unit with a coil assembly is included with the aircraft passenger seat assembly, and the coil assembly is positioned within the component. A portion of the outer surface of the component covers the coil assembly. Wires connecting the coil assembly to a power supply are hidden from view within the aircraft passenger seat assembly.

A management device 50 for power storage elements is provided with a cause analysis unit 51 that, when the voltages of power storage elements B1-B4 are reduced to a prescribed level or physical quantities correlated with the voltages are reduced to prescribed values after the supply of power to the power storage elements B1-B4 has been stopped, analyzes the cause of the voltage reduction in power storage elements B1-B4 or the cause of the reduction in the physical quantities correlated with voltages to the prescribed values, on the basis of measurement data of the power storage elements B1-B4 measured after the supply of power has been stopped.

A management device 50 for power storage elements is provided with a cause analysis unit 51 that, when the voltages of power storage elements B1-B4 are reduced to a prescribed level or physical quantities correlated with the voltages are reduced to prescribed values after the supply of power to the power storage elements B1-B4 has been stopped, analyzes the cause of the voltage reduction in power storage elements B1-B4 or the cause of the reduction in the physical quantities correlated with voltages to the prescribed values, on the basis of measurement data of the power storage elements B1-B4 measured after the supply of power has been stopped.

A hearing instrument charger device for charging an individually shaped hearing instrument, includes: a charger casing; a charger power supply within the charger casing; a first charger coil connected to the charger power supply; charger electronics for controlling charging of the hearing instrument; and a holder configured for receiving the hearing instrument, the holder located within the charger casing; wherein the holder for the hearing instrument has a shape that is specific for the individually shaped hearing instrument, such that when the individually shaped hearing instrument is received in the holder, a second charger coil of the individually shaped hearing instrument is in an operative position for receiving charging power from the first charger coil of the hearing instrument charger device.

A power control method for a charging system includes: detecting a power signal and an input voltage of the power signal; determining a charging protocol supported by the power signal; and determining whether to conduct a power switching circuit or not according to the input voltage of the power signal and the charging protocol supported by the power signal to provide power for an amplifier chip of the charging system.

A method of reducing a power consumption of a wireless device according to one embodiment includes performing, by the wireless device, a calibration of wireless communication circuitry of the wireless device in response to establishing a wireless communication connection with a wireless access point, determining, by the wireless device, a number of disconnections between the wireless device and the wireless access point over a predefined period of time, and increasing, by the wireless device, a sleep interval of the wireless communication circuitry of the wireless device in response to determining the number of disconnections between the wireless device and the wireless access point over the predefined period of time is less than a threshold number of disconnections.

A method docks an autonomous mobile green area maintenance robot to a docking station. An electrical conductor arrangement runs in the region of the docking station, wherein the conductor arrangement is designed such that a periodic current flows through the conductor arrangement, wherein the current generates a periodic magnetic field. The green area maintenance robot has two magnetic field sensors, wherein the two magnetic field sensors are designed such that the magnetic field respectively causes a periodic sensor signal in the magnetic field sensors. The method has the steps of: determining a phase shift between the two sensor signals or signals based on the sensor signals, and controlling movement of the green area maintenance robot for docking on the basis of the determined phase shift.

In a power supply device, switching section switch a connection between batteries to a series connection or a parallel connection. In a case where the connection between the batteries is switched from the series connection to the parallel connection to charge the batteries by an external charger, a controller does not switch the connection to the parallel connection, does not charge one battery having a larger voltage out of the batteries, and separately charges the other battery when a potential difference between a voltage of the battery and a voltage of the battery is a predetermined threshold value or higher; and the controller switches the connection to the parallel connection and charges the batteries when the potential difference is lower than the threshold value.

An electronic device includes a display module including a first region exposed to an outside in first and second modes and a second region extending from the first region, where the second region is partially opposite to the first region in the first mode or is partially exposed in the second mode, the second region includes a curved region in the first mode and a flat region extending from the curved region and opposite to the first region, a supporting member disposed below the display module, a case which contains the display module and the supporting member, where the first and second modes are determined based on a sliding motion of the case, and a wireless charging coil which is contained in the case and shielded by the supporting member in the first mode, and does not overlap the supporting member in the second mode.