1. What is Battery Run Time?

Battery run time is the estimated duration a battery can power a device before needing recharge. It's calculated by dividing the battery's capacity (in amp-hours) by the current draw (in amps).

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Easy Ah — Battery capacity in amp-hours (Ah)
• Easy A — Current draw in amps (A)

Explanation: This formula gives the theoretical maximum run time. Actual run time may vary due to factors like battery age, temperature, and discharge rate.

3. Importance of Run Time Calculation

Details: Knowing battery run time helps in selecting appropriate batteries for devices, planning power needs, and ensuring uninterrupted operation of critical equipment.

4. Using the Calculator

Tips: Enter battery capacity in amp-hours and current draw in amps. Both values must be positive numbers. The result shows estimated run time in hours.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Ah and A?
A: Amp-hours (Ah) measure battery capacity (how much charge it can store), while amps (A) measure current flow (how quickly charge is being used).

Q2: Why is my actual run time shorter than calculated?
A: Real-world factors like battery age, temperature, and higher discharge rates reduce actual capacity below rated capacity.

Q3: Can I use this for any battery type?
A: This works for lead-acid, lithium-ion, and other battery types, but actual performance may vary between chemistries.

Q4: What if my device uses watts instead of amps?
A: Convert watts to amps by dividing by voltage (A = W/V), then use this calculator.

Q5: How accurate is this calculation?
A: It provides theoretical maximum. For critical applications, test with your actual setup and consider a safety margin.