Battery disconnect switches are safety and power devices for the tail lifts. They are used to physically turn the power supply on or off. Once you take the key out of the device, there's no doubt that the tail lift can somehow draw power from the battery! The ones just described are mechanical battery switches, which are used among others, by Dhollandia, Anteo, Elefantcar. Other manufacturers have preferred solutions with magnetic contacts for this purpose. Dautel placed a circular sensor in the dashboard on which to insert a round black key equipped with a magnet that closes the contact. Sorensen and Bar-Cargolift, on the other hand, provide a metal key of a given shape which, inserted into a slot, always closes a magnetic contact. In short, various solutions but all with the same purpose.