The battery life calculator provides an estimate of how long a battery will survive, taking into account the nominal battery capacity as well as the average current that is being drawn from the battery by a load.
The capacity of a battery is most commonly expressed in terms of ampere-hours (Ah) or milliampere-hours (mAh), although watt-hours (Wh) may also be used.
Calculator for Battery Capacity Formula and Equations
Battery Capacity in mAh = (Battery life in hours x Load Current in Amp) / 0.7
Battery Capacity = (Hours x Amp) / Run Time %
Where,
Battery Capacity = in mAH
Battery life = in Hours
Load Current = Consumption of device in Amperes
0.7 = Battery Cycle life considerations – Run time
Ideal Battery Capacity Formula
Battery Capacity = Battery Hours x Battery Amps
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