Ribbed gasket for miniature galvanic cell

A galvanic cell comprising:

• a) a first electrode having a peripheral area, a central area and a polarity;
• b) a second electrode of opposite polarity;
• c) a separator between said first electrode and said second electrode;
• d) an electrolyte;
• e) a two-part conductive housing containing said first electrode, said second electrode, said separator and said electrolyte;
• the first part of said housing being a can having a wall with an edge defining an opening and electrically connected to the first electrode, and the second part of said housing being a cup having a wall with an edge defining an opening and being electrically connected to the second electrode;
• and
• f) an insulating gasket comprising a base member having an outer wall spaced apart from an inner wall thereby defining a U-shaped groove, the base member further having a first segment at the inner wall, a second segment at the inner wall opposing the first segment and at least one insulating rigid rib extending inwardly from the first segment to the second segment;
• wherein the edge of the open end of the cup is disposed within and compressed into the groove of said gasket, the base member is compressed against the peripheral area of said first electrode and the rib is a support for the central area of said first electrode and thereby effectively reduces any bowing at the central area.