Incorrect polarity protection

The device has a receiving unit (20) including contact points (21, 22) for electrodes (12, 13) of circular cells (10). The contact points are arranged on circular disk-shaped contact surfaces (15) of the electrodes, where the contact surfaces are coaxially arranged at a distance to each other along a symmetry axis of a cup-shaped housing. One of the electrodes is extended along the symmetry axis of the cup-shaped housing. The contact points are arranged on sides of the circular cells, where the sides of the circular cells are opposite to each other.