The flat cell contains no voids or carbon rod as does the cylindrical battery. The flat cell, because of its rectangular form, reduces wasted space in assembled batteries. The energy to volume ratio of a multi-cell battery utilizing cylindrical cells is decreased by the voids occurring between the cells. These two factors account for substantially higher energy volume ratio for flat cell batteries when compared to batteries consisting of cylindrical cells. Typical Eveready Flat Cell LeClanche Components Cathodes are a mixture of manganese dioxide, carbon conductor and electrolyte.
Anodes are zinc alloy sheets.
Separators are specially selected to prevent migration of solid particles in the cell. Plastic envelope confines active cell materials. Carbon conductive coating on the zinc anode serves as the cathode collector for the adjacent cell. Wax coating provides the battery seal. Connector strips connect the flat cell stack to the battery terminals.