| 摘要 |
In a second preferred variant of the second exemplary embodiment, the magnetic sensor detects the presence of a magnetic field of the magnetic element as long as no battery is connected to the charger. The battery comprises a shielding device which deflects or shields the magnetic field from the magnetic sensor, so that after connecting the battery to the charger, the magnetic sensor detects that no magnetic field is present and emits an identification signal. This variant is advantageous, in particular in stepped contact devices, whereby one of the two elements is a sensor or magnet at the bottom of the step and the other of the two elements is arranged on the leg at an angle thereto. This makes it possible to achieve a particularly good shielding effect. In this variant, several magnetic elements and magnetic sensors may also be provided.
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