BATTERY AND BATTERY PACK

PROBLEM TO BE SOLVED: To provide a battery and a battery pack wherein assembly man-hour and number of parts are few and cost reduction is realized, and mass producibility is superior, and a high output is obtained by reducing the internal resistance per unit electric cell. SOLUTION: This battery has electrode plate groups in which a core material of a positive electrode plate is exposed on one end and the core material of a negative electrode plate is respectively exposed on another end, an encapsulating case of the bottomed cylindrical shape which becomes an electrode terminal because the bottom face is connected to either one end face of the electrode plate groups, a positive terminal connected to another end face of the electrode plate group, and a cap body fixed to the encapsulating case. The negative electrode terminal joined to the bottom part of the encapsulating case of other battery is coupled to the positive electrode terminal. COPYRIGHT: (C)2004,JPO&NCIPI