Abstract: A multi-cell battery structure in which a stacked array of cells are compressively positioned within an encasement means. Each cell comprises a lithium anode member and a depolarizer pellet adapted to abut the inner surface of encasement means. The depolarizer pellets with or without a cathode screen include a central opening through which lithium from the cell anode is extruded during assembly to form a central column of lithium. The multi-cell array is insulated from the encasement means so that only the depolarizer pellet or associated cathode screen is in contact therewith. A terminal pin, insulated from and positioned through the encasement means is embedded into the central column of lithium to provide electrical contact with battery anodes.