The present invention relates to a wire-wound charger and a rotating electrical connection structure and a formation method thereof. The rotating electrical connection structure comprises two circuit boards, a conductive elastic sheet group and a conductive sheet assembly. The group and the assembly are mounted on one circuit board. The conductive elastic sheet group comprises a plurality of annular elastic sheets, and the conductive sheet assembly comprises a plurality of conductive rings, a plurality of first and second indentation portions are formed between adjacent sheets or adjacent rings, respectively. The circuit boards are respectively provided with hole portions corresponding to the indentation portions. The sheet or ring have a predetermined thickness and is wear resistance, thus providing a long working period. Further, the structure has a high positioning accuracy, is reliable and readily to be formed.

Systems and method for an electric toothbrush and charging dock. The electric toothbrush may include at least one magnetic member and at least one charging coil in a central portion. The charging dock may include at least one magnetic member and at least one transmitting coil. The charging dock may include a proximal portion which may be attached to a distal portion of the charging dock to be rotatable relative to the distal portion. The charging dock may include at least one unit capable of receiving power from a power source. The energy received by the unit from the power source may be transmitted to the transmitting coil. The energy may be transmitted from the transmitting coil to the receiving coil in the electric toothbrush via inductive or resonance charging. The energy may be transferred from the receiving coil to a battery in the electric toothbrush.

The present application discloses a charging module and a battery charging case, the charging module includes a charging compartment and a transfer component. The charging compartment includes a compartment body and a second bracket; the first discharging side of the second bracket includes a first opening for the fully charged batteries to flow through, and the second discharging side of the second bracket includes a second opening for the waste batteries to flow through; the transfer component is installed on the second bracket and located between the first discharging side of the second bracket and the second discharging side of the second bracket. The transfer component switches between the first and second transfer states, such that the fully charged batteries are transferred through the first opening in the first transfer state, and the waste batteries are transferred through the second opening in the second transfer state.

An electronic device may perform designated communication with the external device through a cable, the designated communication including transmitting a first signal and receiving a second signal from the external device, calculating a difference value between a potential of the first signal and a potential of the second signal, determining, based on the calculated difference value and a change in a power voltage input to the electronic device, an impedance of the cable, determining, based on the determined impedance, a charging current, and request the external device to transmit the determined charging current.

A case for an eyewear device having a conductive interface includes a housing that receives the eyewear device. A multi-purpose interface, supported by the housing, includes at least one contact arranged to couple with the conductive interface of the eyewear device when the housing receives the eyewear device. Circuitry is coupled to the at least one contact and includes a processor that detects a connection of the conductive interface of the eyewear device to the multi-purpose interface of the case. The processor performs a charging process during a charge state of the case in which an electrical charge is provided at the multi-purpose interface of the case to the eyewear device. Data is exchanged with the eyewear device during a communication state of the case.

A vaporizer may include a vaporizer body configured to couple with a vaporizer cartridge including a vaporizable material. The vaporizer body may include a first power source configured to discharge a current to a heating element in order to cause a vaporization of at least a portion of the vaporizable material included in the vaporizer cartridge by at least increasing a temperature of the heating element. The vaporizer configured to engage in a reverse charging with a device in which the first power source of the vaporizer charges or is charged by a second power source at the device. Various embodiments of the vaporizer cartridge are provided.

Discussed is an energy storage system that may include a plurality of first battery racks; a central DC/DC converter connected to the plurality of first battery racks and configured to perform power conversion; a plurality of second battery racks; and a plurality of DC/DC converters connected to the plurality of second battery racks respectively and configured to perform power conversion. Here, the central DC/DC converter and the plurality of DC/DC converters are connected in parallel to a DC bus connected to at least one of a power conversion device (PCS) and a power generation device.

A wall-mounted assembly may include one or more host devices which receive line voltage and generate low voltage power on one or more contacts for powering one or more modular devices. The one or more modular devices may be installed adjacent to the host device and may share a faceplate with the host device, such as a standard decorator faceplate. The modular devices may receive power from the host device via a power bus between the host device and the one or more modular devices. Further, the power bus may include a communication bus for communication between the host device and the modular devices. The faceplate may be a smart faceplate, which may include circuitry, such as a battery backup, occupancy sensing, a charging dock for a mobile phone, etc.

The present invention provides a system and method providing a self-contained, regenerative main power source located within a stator section of an electromechanical motor converting physical energy into electrical energy and applying it to the power source to recharge the power source.

An e-cigarette PV that includes an air pressure valve or device so that excess air can escape from an e-liquid reservoir in the PV when that reservoir is being filled under pressure with e-liquid from a parent reservoir. The valve or device is a barrier made of an air-porous material, such as a sintered polymer or metal, coated with or otherwise including a barrier or layer of an air-porous substance that is not porous to e-liquid, such as an oleophobic material or a hydrophobic or super-hydrophobic material. The oleophobic material is one of: sintered phosphor bronze, sintered stainless steel and sintered PU plastic.