1. What is Battery Runtime?

Battery runtime refers to the duration a battery can power a device before needing recharging. It's calculated based on the battery's capacity (Ah), voltage (V), and the current draw of the connected load (A).

2. How Does the Calculator Work?

The calculator uses the battery runtime formula:

Where:

• \( Ah \) — Battery capacity in ampere-hours
• \( V \) — Battery voltage in volts
• \( Load \) — Current draw of the connected device in amperes

Explanation: This formula calculates how long a battery will last by dividing the total energy capacity (Ah × V) by the power consumption rate (Load).

3. Importance of Battery Runtime Calculation

Details: Calculating battery runtime is essential for designing power systems, selecting appropriate batteries for applications, and ensuring devices have sufficient power for their intended use duration.

4. Using the Calculator

Tips: Enter battery capacity in Ah, voltage in V, and load current in A. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Does this calculation work for all battery types?
A: While the formula is universal, actual runtime may vary slightly depending on battery chemistry, age, temperature, and discharge rate.

Q2: Why is my actual battery life different from the calculation?
A: Real-world factors like battery age, temperature, discharge rate, and efficiency losses can affect actual runtime.

Q3: Should I consider battery efficiency in calculations?
A: For more accurate results, you might multiply the result by an efficiency factor (typically 0.8-0.9 for lithium batteries).

Q4: How does battery voltage affect runtime?
A: Higher voltage batteries store more energy (watt-hours) for the same Ah rating, resulting in longer runtime for the same load.

Q5: Can I use this for battery packs in series/parallel?
A: For series connections, add voltages but keep Ah the same. For parallel connections, add Ah but keep voltage the same.