The ampere-hour size of a battery depends on:

  • the voltage of the battery;

  • the load in watts; and, 

  • the length of time the load is to operated,

You can determine your own battery size by entering the data below:

  • select the voltage,

  • select the time (Code is 90 minutes minimum for emergency lighting),

  • enter the load in watts,

  • the calculator will automatically determine the minimum ampere-hour size of the required battery.

     Voltage               Time



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Thursday, July 23, 2009