Patent ID: 6933074

Claim:
An electrochemical cell, which comprises: a) a casing having a length defined by opposed sidewalls thereof; b) an electrode assembly housed inside the casing and comprised of a first electrode of a first polarity and a second electrode of a second, opposite polarity, wherein the second electrode has covered portions substantially covered by the first electrode and at least two uncovered portions not directly opposite the first electrode at opposite ends of the electrode assembly and adjacent to the opposed casing sidewalls, and wherein the first electrode is electrically connected to the casing as its terminal and the second electrode is connected to a terminal lead insulated from the casing; c) a primary insulator in the shape of a ring that surrounds the electrode assembly to cover and prevent the uncovered portions of the second electrode at the opposite ends of the electrode assembly from coming into contact with the opposed casing sidewalls; and d) an electrolyte provided in the casing to activate the electrode assembly.