Patent ID: 7105248

Claim:
A power supply unit, comprising: plural batteries each having a same structure, each of said plural batteries including: a package including a first cup-shaped component part and a second component part directly on and bonded to said first component part for closing said first component part, said first component part having a base and angled sides, said base of said first component part having a first length, said second component part having a base and angled sides, said base of said second component part having a second length greater than said first length; an electrolyte cell received in said cupshaped component part, and hermetically sealed in said package; and lead terminals having respective inner portions electrically connected to said electrolyte cell, respective outer portions projecting from said package and respective intermediate portions passing through the boundary between said first component part and said second component part and on a level with or higher than the upper surface of said electrolyte cell, wherein said plural batteries are stacked one on top of another and are electrically connected together to form a power supply unit, and wherein said second component part of one of said plural batteries is made from a flexible film.