Reviewed By: Patrick Myers (BSME)
Enter the total battery capacity in amp hours and the energy usage in watts to calculate the total battery run time.
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Battery Run Time Formula
The following equation is used to calculate the total run time of a battery.
T = C * V / LP
- Where T is the time in hours
- Where C is the capacity (ah)
- V is voltage (volts)
- LP is the load power (watts)
To calculate the battery run time, divide the amp hours by the power output.
Battery Run Time Definition
A battery run time is the total time in hours that a battery can sustain a certain power output.
Battery Run Time Example
The following is an example of how to calculate a total battery run time.
- First, determine the battery capacity. This is the total energy storage the battery can hold in amp-hours. For this example, we will say that value is 100 Ah.
- Next, determine the power output. This power output is also known as the usage rate and is measure in watts. We will say 50 watts for this problem.
- Finally, use the formula to calculate battery run time. 10 * 100 /50 = 20 hours.
FAQ
What is battery run time?
Battery run time is the total amount of time a battery can sustain a certain power output. This run time will depend on several factors including discharge %, battery size, type of batter, and many more.
