An electronic device is provided with built-in battery, a first latch for locking first battery, and a second latch for locking second battery. The electronic device also includes: first switch alternatively selecting a battery for supplying power to the electronic device from first battery and second battery; and second switch for switching on and off the supply of power from built-in battery to the electronic device. The electronic device is additionally provided with a latch opening/closing detector for detecting opening and closing of the first latch and the second latch, battery remaining amount detector for detecting remaining amounts of first battery and second battery, and a power controller for controlling first switch and second switch. The power controller controls first switch and second switch based on detection results of latch opening/closing detector and battery remaining amount detector.

An electronic device includes an internal battery, a first battery, and a second battery. The device further includes a first latch for locking the first battery and a second latch for locking the second battery. The device further includes a latch state detector for determining whether each of the first and second latches are open or closed, and a remaining battery power detector for detecting the remaining power in each of the first battery, the second battery, and the internal battery. The device further includes an LED and an LED controller for controlling the on-off of the LED. The LED controller operates as follows when the first or second latch is determined to be opened. If at least one of the first battery, the second battery, and the internal battery can supply electric power to the electronic device, the LED controller lights the LED in a first ON state. If none of the first battery, the second battery, and the internal battery can supply electric power to the electronic device, the LED controller makes the LED light in a second ON state.

Disclosed are a wireless charging device and a notebook computer including the wireless charging device. The wireless charging device includes a device body, wherein further includes a charging board rotatablely connected with the device body; the charging board is provided with a charging-discharging coil; the device body is provided with a hollow for accepting the charging board; the hollow has a touch switch disposed therein for switching working circuit of the charging-discharging coil; the device body has a battery disposed therein and a charging circuit and a discharging circuit, both of which are connected with the battery; when the charging board is located inside the hollow, the charging-discharging coil is connected with the charging circuit so as to enter a charging mode; and when the charging board is located outside the hollow, the charging-discharging coil is connected with the discharging circuit so as to enter a discharging mode.

An electronic device may include a housing including an upper opening part, a flat panel display set arranged in the upper opening part and including a screen, and a circuit board arranged under the flat type display set and coupled to an inner surface of the housing.

A band, including: a device which has a part to be protected; and a protective frame which has a soft section that is easily deformed and a hard section that is less easily deformed than the soft section, the hard section being connected to the soft section and disposed at a portion where the part to be protected is disposed.

A separation alert device for warning a user of separation from an item includes a housing that defines an internal space. The housing is configured for retention on the user's person. A power module, a microprocessor, a first proximity sensor and a plurality of alarms are coupled to the housing and are positioned in the internal space. The microprocessor is operationally coupled to the power module. The first proximity sensor and the alarms are operationally coupled to the microprocessor. A second proximity sensor is in wireless communication with the microprocessor. The second proximity sensor is coupled to an item that the user desires to retain proximate to the user. The microprocessor is positioned to receive a location signal from the second proximity sensor. Separation of the first proximity sensor by a preset distance from the second proximity sensor will compel the microprocessor to compel the alarms to notify the user.

A case for storing a mobile computing device and a wireless earbud includes a back panel; a front panel defining a viewing aperture which extends through the front panel; a plurality of sidewalls extending around a perimeter of the back panel and configured to couple the perimeter of the back panel to a perimeter portion of the front panel; a dividing layer between the front panel and the back panel, such that the front panel and the dividing layer together define a first housing configured to receive and restrain a mobile computing device, and the dividing layer and the back panel together define a second housing; and a wireless earbud charging contact disposed within the second housing and configured to contact and charge the wireless earbud when the wireless earbud is positioned in the case.

A self-attaching supplemental battery for a cellular phone comprises a housing containing a rechargeable battery. A releasable attachment pad is affixed to an attachment side of the housing to releasably couple the housing and the rechargeable battery to a back of the cellular phone. A cover is removably carried by the housing, and selectively locatable on either side. The cover comprises a panel sized and shaped to cover the releasable attachment pad in a protection location when located on the attachment side of the housing, and to expose the releasable attachment pad in a storage location when located on the face side of the housing.

A handheld computing device and handheld music player are disclosed. The handheld computing device includes a seamless enclosure formed from an extruded tube. The extruded tube includes open ends and internal rails which serve as a guide for slidably assembling an operational assembly through the open ends of the extruded tube, a reference surface for positioning the operational assembly relative to an access opening in the seamless enclosure, and a support structure for supporting the operational assembly during use. The handheld music player includes an elongated extruded tube extending along a longitudinal axis. The elongated extruded tube has a first open end and a second open end opposite the first open end, and defines an internal lumen which is sized and dimensioned for slidable receipt of operational components of the handheld music player. The lumen includes rails for guiding the operational components to their desired position within the lumen.

An energy storage device comprises a first porous semiconducting structure (510) comprising a first plurality of channels (511) that contain a first electrolyte (514) and a second porous semiconducting structure (520) comprising a second plurality of channels (521) that contain a second electrolyte (524). In one embodiment, the energy storage device further comprises a film (535) on at least one of the first and second porous semiconducting structures, the film comprising a material capable of exhibiting reversible electron transfer reactions. In another embodiment, at least one of the first and second electrolytes contains a plurality of metal ions. In another embodiment, the first and second electrolytes, taken together, comprise a redox system.