1. What is Battery Run Time?

Battery run time is the duration a battery can power a device before needing recharge. It depends on the battery's capacity (Ah), voltage (V), and the power consumption (W) of the connected load.

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 of the load in watts

Explanation: The formula calculates how long a battery can sustain a given load by converting the battery's energy capacity (Ah × V = Wh) and dividing by the load's power consumption (W).

3. Importance of Run Time Calculation

Details: Accurate run time estimation is crucial for designing power systems, selecting appropriate batteries, and ensuring uninterrupted operation of electronic devices.

4. Using the Calculator

Tips: Enter battery capacity in Ah, voltage in V, and load power in W. All values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all battery types?
A: This provides theoretical maximum. Real-world results vary due to temperature, battery age, discharge rate, and efficiency losses.

Q2: How does battery type affect run time?
A: Lithium batteries maintain voltage better than lead-acid when discharging, often providing longer effective run time.

Q3: What's the difference between Ah and Wh?
A: Amp-hours (Ah) measure charge capacity, while watt-hours (Wh) measure energy capacity (Ah × V = Wh).

Q4: Should I derate the calculated run time?
A: For critical applications, multiply result by 0.7-0.8 to account for real-world inefficiencies.

Q5: How does parallel/series configuration affect this?
A: Series increases voltage (V × n), parallel increases capacity (Ah × n). Adjust inputs accordingly.