1. What is Battery Run Time?

Battery run time refers to how long a battery can power a device before needing to be recharged. It depends on the battery's capacity (Ah), voltage (V), and the power consumption (W) of the device.

2. How Does the Calculator Work?

The calculator uses the battery run time formula:

Where:

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

Explanation: The formula calculates how many hours a battery can supply power to a device by dividing the total energy capacity (Ah × V) by the power draw (W).

3. Importance of Run Time Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between Ah and Wh?
A: Ah (amp-hours) measures charge capacity, while Wh (watt-hours) measures energy capacity (Ah × V). Wh accounts for voltage differences between batteries.

Q2: How accurate is this calculation?
A: It provides theoretical maximum run time. Actual run time may be less due to temperature, battery age, discharge rate, and other factors.

Q3: Can I use this for any battery type?
A: Yes, the formula works for lead-acid, lithium-ion, NiMH, and other battery types as long as you know their Ah rating and voltage.

Q4: Why does my battery last less than calculated?
A: Battery capacity decreases with higher discharge rates (Peukert effect), cold temperatures, and as the battery ages.

Q5: How can I increase battery run time?
A: Use a higher capacity (Ah) battery, reduce power consumption (W), or use multiple batteries in parallel (with proper configuration).