| 摘要 |
The invention refers to an exchangeable power-supplying unit ( 200, 300 ) arranged to supply electric power to a device ( 100, 400 ). The power-supplying unit ( 200, 300 ) is arranged so as to provide the device ( 100, 400 ) with one or several additional functionalities and it can preferably be attached so as to form an integral part of the device ( 100, 400 ). The additional functionality is accomplished by one or several processing units ( 220, 312, 319 ) contained in the power-supplying unit ( 200, 300 ) for pre-processing information, which is subsequently communicated from the power-supplying unit ( 200, 300 ) to the device ( 100, 400 ).
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