Patent ID: 6235429
Filing Date: 2001-05-22
Classification: H01M

Abstract:
An AAA alkaline dry cell comprisinga hollow cylindrical cathode depolarizing mixture having electrolytic manganese dioxide as an active material and a gel anode having zinc alloy powder as an active material which are placed with a cylindrical separator therebetween in a metallic cathode can which is a closed-end cylinder and doubles as a cathode terminal, anda metallic anode current collector which is inserted into the gel anode, whereinthe electrolytic manganese dioxide is in an amount of 1.71 g to 4.11 g,the zinc alloy powder is in an amount of 0.65 g to 1.69 g,a theoretical capacity ratio (N.sub.E /P.sub.E) between the anode and the cathode is in a range of 1.0 to 1.20, anda contact area ratio (P.sub.A /N.sub.A) between an anode-opposed area of the cathode depolarizing mixture and a contact area of the current collector against the gel anode is in a range of 1.82 to 5.48.