Abstract: An organic-electrolyte lithium-oxygen battery with a full-enclosed structure and a preparation method thereof are disclosed. In the present disclosure, a lithium-oxygen battery unit is enclosed in a shell containing pure oxygen, and the reactant oxygen is recycled without additional supply. Among them, a part of oxygen is stored in the form of lithium peroxide by pre-discharging. When in use, a charging is firstly performed to decompose the lithium peroxide to release the fixed oxygen.

Abstract: A collapsible device having first housing (110) rotateably coupled to a second housing (120) so as to rotate from a closed position (103) to an open position (200), wherein the first housing is angularly displaced from the second housing, for example in a wireless communications device. The first housing also moves relative to the second housing from a first closed position (101) to a second closed position (103). From the second closed position the first housing may rotate relative to the second housing about a rotation axis 106. In one embodiment the collapsible housing includes a slide enabling member that is rotatably coupled to the hinge and enables the first housing to move from the first closed position to the second closed position.

Abstract: The present disclosure is related to an antenna (129) adapted to receive signals in multiple frequency bands, and comprises a fixed whip antenna (406) and a helical coil antenna (408) coupled to a single feedpoint. The antenna may also include a monopole common to the fixed whip antenna and the helical coil antenna. A single matching circuit (130) is adapted to provide matching for both the whip antenna and the helical coil antenna. According to one embodiment, the antenna can also be reduced in size by attaching a disc (704) to the end of the whip portion of the antenna, while decreasing the pitch of the helical coil. Finally, a clip (210) can be used below a threaded nut of a housing to provide a feed point for the antenna to further reduce the electrical lengths of the fixed whip antenna and a helical coil antenna.