The conveyor (10) has two battery cells (38, 40) i.e. lithium cells, integrated in a cavity or inaccessible locations of the conveyor in difficultly removable or not exchangeable manner. One of the battery cells is fixed in an inner side of a wheel arm bel...

The truck, towing a service unit (11), has at least one safety switch (9) and at least one drive unit with electronic control (12) with commands passing through a series connection (16). The safety switch sends information to the electronic control via a s...