Power supply unit for an electronic device, e.g. a laptop or digital camera, has a battery and a power supply cable, for connecting to the electronic device, which is mounted on a cable roll so that it can be wound in and out

摘要

Power supply unit (4) for an electronic device, e.g. a laptop computer, has a battery, a control circuit and an power transmission cable (44) that has one end connected to the control circuit, which controls power supply, and its other end terminated in an electrical connection (441) for connection to an electronic unit. The cable is mounted on a cable roll so that it can be wound in or out of the housing.