Patent ID: 7314681

Claim:
An alkaline battery cell comprising: a cylindrical cell container comprising a straight side wall, a closed bottom end, and an open top end; a positive electrode comprising electrolytic manganese dioxide, a negative electrode comprising zinc, a separator, and an electrolyte comprising a potassium hydroxide solute in water disposed inside the container; a closing element closing the open end of the container and sealing the electrodes and electrolyte within the cell; wherein: the positive electrode has a hollow cylindrical shape and is disposed against the side wall and the bottom end of the container to form a cavity within the hollow cylinder, the negative electrode is disposed within the cavity in the positive electrode, and the separator is disposed between the negative electrode and both the positive electrode and the bottom of the container; the container straight side wall has an outside diameter of 7.3 to 14.5 mm; and the positive electrode has a height of 45.7 to 76.2 mm from the bottom of the container.