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Battery Life Calculator for RTCs


This calculator determines timekeeping operation time based upon battery capacity and load.Where:
IBAT (max) is the maximum battery current, as noted in the RTC’s data sheet.
IBAT (typ) is the typical battery current defined at both +25?C and the nominal supply voltage, as noted in the RTC’s data sheet.

http://www.maxim-ic.com/tools/calculators/battery.cfm