Abstract: The rechargeable cell comprises a cathode formed from a compressed mixture of manganese dioxide particles, electrically conductive particles and a binder; an anode separated from the cathode and containing amalgamated metallic zinc particles on an electrically conductive carrier in an amount sufficient to provide a limited anode discharge capacity of about one-third of the cathode capacity; an aqueous alkaline electrolyte; and a charge reserve mass comprising an oxide or hydroxide of zinc in an amount sufficient to provide a charge reserve capacity for said cell equal to at least 50 percent of the anode discharge capacity.

Abstract: A cathode contact member is disposed at the interface between the molded tubular cathode shell and the interior side walls of the metallic container in an alkaline round cell, the contact member being at least partially embedded in the tubular cathode shell and making permanent electrical connection with the metallic container.