Patent ID: 8092939

Claim:
A manganese dry battery comprising: an anode zinc can with a covered bottom and a cylindrical can wall made from an anode active material which comprises: 98.7 percent by mass or more and 99.8 percent by mass or less of zinc, 0.01 percent by mass or more and 0.7 percent by mass or less of bismuth, 1 ppm or less of antimony, 70 ppm or less of lead, 20 ppm or less of cadmium; wherein the anode zinc can structure in a cross section of said can wall being cut in a height and thickness direction consists of crystals of 8 μm or more and 25 μm or less of average grain diameter as measured on a projected image of the crystals on a horizontal line in the thickness direction; wherein crystal grain diameter at the outer wall of the zinc can is 1.0 to 1.4 times the crystal grain diameter at the inner wall; and wherein the zinc can is produced by deep drawing a pellet of the anode active material at a temperature ranging from 120 to 210° C.