Patent ID: 7740979

Claim:
An electrochemical cell, comprising: a cylindrical container housing a first electrode, a second electrode, an alkaline electrolyte, and a separator; said first electrode defines a tubular cavity therein and comprises manganese dioxide as an electrochemically active material, said first electrode's electrochemical capacity determined by multiplying the grams of manganese dioxide by 285 mAhr/g; said second electrode, disposed within said cavity, comprises zinc as an electrochemically active material, said second electrode's electrochemical capacity determined by multiplying the grams of zinc by 821 mAhr/g; said separator disposed at the interface between the first and second electrodes, wherein said cell is an LR6 size cell, the area of the interface is between 12.6 cm 2 and 13.2 cm 2 and the ratio of the second electrode's electrochemical capacity to the first electrode's electrochemical capacity is between 1.33:1 and 1.40:1, wherein said zinc consists of particulate zinc, and wherein said particulate zinc has a BET specific surface area greater than 400 cm 2 /g, a KOH absorption value of at least 14%, and a D 50 less than 130 microns.