When the contact lug in the expansion section is designed as a track- or strip-like conductor or comprises a conductor of this kind, this conductor preferably has a width of 0.5 mm to 4 mm. The width of the track- or strip-like conductor in the expansion section is preferably constant.

Due to the tapering, the contact lug in the expansion section can also have the function of a fuse. If an excessively high current flows through a correspondingly tapered contact lug, the contact lug can be destroyed by melting. However, in structures such as this, the contact lug is at least discolored in the region of the tapering, which discoloration can serve as an indicator of a short circuit.

A non-linear profile of the second contact lug in the expansion section means that the contact lug is subject to at least one change in direction, preferably two or more changes in direction, in this section.

The height of the cell generally means the distance between the first and the second end face of the housing. The length of the second contact lug and/or the length of the at least one track- or strip-like conductor or conductor with a round cross section in the expansion section particularly preferably exceeds the height of the cell at least by a factor of 1.1 to 5, in particular 1.3 to 5.

Further particularly preferably, the cell is additionally distinguished by at least one of the immediately following a. to c.:

• • a. The contact lug comprises at least one bent or bent-away lower section in the expansion section.