| 摘要 |
<p>The device has a battery pack (3) comprising an electric energy storage element (18) in a casing (17). A support (2) is provided with a sensing element (39) e.g. magnetic switch, connected to an electronic device, and the pack is provided with a detectable element (31) e.g. magnet, acting on the sensing element when the elements are present. The sensing element delivers a presence/absence signal of the detectable element to the device based on presence/absence of the pack with respect to a coupling position, so that the device is in working state when the device receives the presence signal.</p> |
