Abstract: An energy storage device includes an electrochemical electrode assembly, a substantially cuboid housing having a first housing wall and a second housing wall arranged substantially perpendicular to one another, a first cell terminal of first polarity and a second cell terminal of second polarity, the cell terminals extending from the first housing wall, the first cell terminal including a first contact area having a first normal vector, the second cell terminal configured with a substantially plate-shaped connecting leg that sectionally extends beyond the second housing wall and includes a second contact area having a second normal vector having the same direction as the first normal vector and reversed orientation.