| 摘要 |
It is shown a lid (100) at a portable device (150), as well as a portable device (150) having a lid (100), where said portable device (150) contains electrical device circuitry (151) within a device housing (152). The lid (100) comprises electrical lid circuitry (101), mechanical lid connection means (103) for enabling mechanical connection and disconnection to mechanical device connection means (153) of the device (150) that are accessible from without the housing (152). The lid (100) further comprises electrical lid connection means (102) for enabling electrical connection and disconnection to electrical device connection means (154) of the device (150) that are accessible from without the housing (152). The electrical lid circuitry (101) comprises electrical calibration means (104) that enable calibration of the electrical lid circuitry (101) to a predetermined calibration value as sensed at the electrical lid connection means (102).
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