Patent ID: 8790828

Claim:
A primary AAA-size electrochemical cell comprising: a housing; a positive terminal and a negative terminal; an anode comprising at least one of a lithium metal and lithium alloy as anode active material; a cathode comprising iron disulfide (FeS 2 ) as cathode active material and conductive carbon; and a separator sheet between the anode and the cathode; wherein the cell is balanced so that a ratio determined by a theoretical capacity of the anode (mAmp-hrs) divided by a theoretical capacity of the cathode (mAmp-hrs) is greater than 1.0, the theoretical capacity of the anode and the theoretical capacity of the cathode are based on a dischargeable portion of the anode and a dischargeable portion of the cathode that have the separator sheet therebetween; the anode and the cathode must be opposite to and facing one another with the separator sheet disposed therebetween in order for the anode and the cathode to be dischargeable; and the theoretical capacity of the cathode is between approximately 1650 mAmp-hrs and approximately 3000 mAmp-hrs.