Patent ID: 8057928

Claim:
A battery having an 18650 form-factor, the battery comprising: a cell case having a cylindrical outer surface, a first end and a second end, wherein said first end is closed by a cell case bottom, and wherein said second end is comprised of a central open portion; an electrode assembly contained within said cell case, wherein a first electrode of said electrode assembly is electrically connected to said cell case; and a cap assembly mounted to said cell case, said cap assembly closing said central open portion of said second end of said cell case, wherein said cap assembly further comprises: a current interrupt device (CID), wherein said CID is electrically isolated from said cell case and electrically connected to a second electrode of said electrode assembly; a safety vent element electrically isolated from said cell case, wherein an inner surface of said safety vent element is electrically connected to said CID, wherein a portion of an outer surface of said safety vent element serves as a battery terminal for said battery, and wherein said outer surface of said safety vent element is recessed relative to an outermost edge portion of said second end of said cell case; and an insulating gasket interposed between an inner surface of said cell case and said safety vent element, wherein said insulating gasket includes an aperture, and wherein said aperture defines said battery terminal.