RTC battery lifetime online calculator

Free calculator to estimate how long your battery (e.g. CR2032) will last in your microcontroller RTC application. Note: The default capacity of 220 mAh is a typical capacity for a CR2032 coin cells.

[to-calculator-info][/to-calculator-info][calculator] [calculator-input name=“capacity” label=“battery capacity” value=“220m” unit=“Ah”][/calculator-input] [calculator-input name=“consumption” label=“RTC suppy current” unit=“A”][/calculator-input][calculator-expression name=“hours” formula=“capacity/consumption” unit=“h”][calculator-expression name=“days” formula=“hours/24” unit=“d”][calculator-expression name=“years” formula=“days/365.25” unit=“y”][calculator-expression name=“months” formula=“years*12” unit=“mo”] [calculator-output name=“RTC battery lifetime” unit=“year”]A RTC consuming <%= format(consumption, “A”) %> operated with a battery capacity of <%= format(capacity, “Ah”) %> will last approximately <%= formatFloat(years, " years") %> (i.e. <%= formatFloat(months, " months", 1) %>, <%= formatFloat(days, " days", 1) %> or <%= formatInteger(hours, " hours") %>) [/calculator-output][/calculator]