Abstract: An electronic device is provided. The electronic device is adapted to be disposed on a mounting surface. The electronic device includes a device body, a connection base and a bracket. The connection base is connected to the device body. The connection base is adapted to be rotated between a first orientation and a second orientation relative to the device body. When the connection base is in the first orientation, the connection base is connected to the device body. When the connection base is in the second orientation, the connection base is separated from the device body. The bracket is wedged against the connection base, wherein the bracket is adapted to be affixed to the mounting surface.

Abstract: A battery charging system is provided, and includes a control unit, a charging unit, and a measurement unit. The control unit is configured to generate and output a control signal. The charging unit is coupled to the control unit and a battery. The charging unit is configured to receive the control signal, generate a charging current according to the control signal, and output the charging current to charge the battery. The measurement unit is coupled to the battery and the control unit. The measurement unit is configured to measure a battery voltage output by the battery, and output a measurement signal to the control unit. The measurement signal corresponds to the battery voltage.