Patent ID: 7435395

Claim:
A primary alkaline cell comprising a negative and a positive terminal, and an outer casing having a pair of opposing sides running along a portion of the length of said casing, said casing having a closed end and an opposing open end, said cell further comprising an anode comprising zinc and a cathode comprising nickel oxyhydroxide within said casing, a separator between said anode and cathode, and an end cap assembly sealing the open end of said casing thereby forming a boundary surface around the cell interior; wherein said cathode comprises at least one cathode slab having an opening defined therethrough devoid of cathode material, with at least a portion of the outer surface of said cathode contacting the inside surface of said outer casing; wherein the cathode comprises a plurality of rectangular shaped cathode slabs; wherein each of said slabs has a central opening devoid of cathode material; wherein said cathode slabs are stacked within the casing so that said openings devoid of cathode material form a core, with the outer surface of said cathode contacting the inside surface of said casing wherein the total zinc in the anode comprises zinc fines of dimensions suitable to pass through a standard 200 mesh screen having square openings of 0.075 mm and said total zinc in the anode further comprises zinc particles of larger size than said zinc fines so that the mean average particle size of said total zinc is between about 75 and 340 microns.