Patent ID: 7074520

Claim:
An electrochemical cell, which comprises: a) a negative electrode; b) a positive electrode; c) a casing housing the negative and positive electrodes, wherein the casing comprises a first portion having a first major side wall extending to and meeting with a first surrounding side wall and a second portion having a second major sidewall extending to and meeting with a second surrounding side wall and wherein the first and second portions are mated to each other with a first outer edge of the first surrounding side wall facing the second major side wall and a second outer edge of the second surrounding side wall facing the first major side wall with at least a portion of the first surrounding side wall in an overlapping relationship with a portion of the second surrounding side wall having the first outer edge hermetically secured to the second surrounding side wall and wherein the first and second major sidewalls deflect in a similar direction; and d) an electrolyte provided in the casing to activate the negative and positive electrodes.