Battery Life Calculator

This calculator will help to calculate the runtime of a battery.

Inputs
Capacity Rating of Battery
mAH
mA

Output
Battery Life

Capacity: Measured in ampere-hours, the capacity of a battery can usually be found printed on the battery casing.

Consumption: The average current draw of the electronic device, expressed in amperes.

Discharge Safety: The percentage of the battery that is not utilized.

Equations

$$Battery life = Capacity / consumption X (1 - discharge safety)$$

Application

This calculator computes the amount of time for which a battery can supply power to a given circuit.