Both the cover (1) and the can (2) of the primary battery, in the form of a button cell, preferably a lithium battery, have a substantially cylindrical edge flange (3, 11), between which a sealing and insulating ring (6) is located for gas-tight sealing of the battery. The sealing and insulating ring (6) consists preferably of a substantially dimensionally stable plastic and has an approximately L-shaped cross-section. Due to the sealing insulating ring, the can (2) and the cover (1) are at both an axial and a radial distance from one another and are mutually joined mechanically by firm seating. The primary battery according to the invention is conceived as a high-power button cell of small diameter and small overall height and is intended to achieve an extremely long life. IMAGE
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