1. What is the Battery Run Time Formula?

The battery run time formula estimates how long a battery will last under a given load. It's calculated by multiplying the battery's amp-hour (Ah) rating by its voltage (V), then dividing by the power consumption (W) of the device.

2. How Does the Calculator Work?

The calculator uses the battery run time equation:

Where:

• \( Ah \) — Battery capacity in amp-hours
• \( V \) — Battery voltage in volts
• \( W \) — Power consumption in watts

Explanation: The equation calculates how many hours a battery can supply a given power load before being fully discharged.

3. Importance of Run Time Calculation

Details: Accurate run time estimation is crucial for designing power systems, selecting appropriate batteries, and ensuring devices operate for required durations.

4. Using the Calculator

Tips: Enter battery capacity in Ah, voltage in V, and device power consumption in W. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation for lead-acid or lithium batteries?
A: The formula works for both, but actual run time may vary due to different discharge characteristics.

Q2: Does this account for battery efficiency?
A: No, this is a theoretical maximum. Real-world results may be 10-20% less due to efficiency losses.

Q3: What if my device lists current (A) instead of power (W)?
A: Multiply current by voltage to get power (W = A × V) before using this calculator.

Q4: How accurate is this calculation?
A: It provides a good estimate, but actual results depend on temperature, discharge rate, and battery age.

Q5: Can I use this for battery banks?
A: Yes, for parallel configurations sum the Ah ratings while keeping voltage constant.