Patent ID: 6625477
Filing Date: 2003-09-23
Classification: H02J

Abstract:
A battery pack for a mobile telephone comprising:(a) a housing; (b) a battery having a plurality of cells, including at least first and second adjacent cells connected in series, positioned within said housing; (c) an interface for electrically coupling said battery to said mobile telephone, said interface comprising: (1) a positive terminal connected to said battery at a first end; and (2) a negative terminal connected to said battery at a second end; (d) a first electrical path originating at said positive terminal, passing first through said first cell, then through said second cell, and then terminating at said negative terminal, said first electrical path providing means for powering said mobile telephone; (e) wherein said interface further comprises an identification terminal connecting to said first electrical path at a tap disposed between said first and second cells and supplying a tap voltage; and (f) wherein a type of battery positioned within said housing is distinguished by a said tap voltage.