Patent ID: 8663825

Claim:
A system for selectively providing an indication of an end of life condition comprising: an electrochemical device comprising a positive terminal, a negative terminal, and a cell comprising a cathode, the cathode comprising an amorphous or semi-crystalline copper manganese oxide cathode material; a sense component comprising a voltage sensor for sensing a voltage of the electrochemical device, said sense component having a positive input, a negative input, and an output, wherein the positive input is connected to the positive terminal of the electrochemical device and the negative input is connected to the negative terminal of the electrochemical device; and a controller connected to the output of the sense component, the controller receiving a signal from the sense component indicative of the voltage of the electrochemical device, determining whether to provide an indication of an end of life condition as a function of the received signal, and selectively providing an indication of the end of life condition as a function of said determining, wherein an average molar ratio of copper to manganese in the copper manganese oxide cathode material is from about about 3:1 to 6:1.