IOW, there are batteries warrantied for 60, 72, 84, or more months that give back full value only during the first 36 months. After that, the value is prorated, sometimes at only 50% starting with the day after 36 months, until there is zero value at the end of the warranty period. kurtwm1 July 21, 2017, 10:01pm 18. More @Wikipedia
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