The increasing use of lithium instead of mercury-zinc power sources in cardiac pacemakers has resulted in a change of end-of-life characteristics. In this paper we will describe the methods used to make an accurate assessment of end-of-life of the lithium batteries used by Vitatron. These are the lithium-silver chromate cell (S.A.F.T.) and the lithium-iodine cell (Catalyst Research Corp.), which are used in the Vitatron S 6000 and C 2000 series of pacemakers.
KeywordsPulse Generator Open Circuit Voltage Internal Resistance Current Drain Output Impedance
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