| abstract |
Alkaline electrochemical cells having a porous cathode comprising manganese dioxide, wherein the cathode porosity is equal to or greater than 27%, the anode porosity is equal to or greater than 69%, the anode comprises zinc, and the calculated overall tap density of the zinc is less than 3.2 g/cc, perform well on constant wattage discharge. The zinc in the cell anode may comprise at least 4%, by weight, uniformly shaped zinc particles with low apparent density. |