1. What is Battery Run Time?

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

2. How Does the Calculator Work?

The calculator uses the battery run time equation:

Where:

• Battery Capacity — Measured in ampere-hours (Ah)
• Voltage — Battery nominal voltage (V)
• Load Power — Power consumption of the device (W)

Explanation: The equation calculates how long a battery can sustain a given power draw based on its total energy capacity.

3. Importance of Run Time Calculation

Details: Accurate run time estimation is crucial for system design, backup power planning, and ensuring uninterrupted operation of critical 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.

5. Frequently Asked Questions (FAQ)

Q1: Why is my actual run time different from calculated?
A: Real-world factors like temperature, battery age, discharge rate, and efficiency losses can affect actual performance.

Q2: What's the difference between Ah and Wh?
A: Ah (ampere-hours) measures charge capacity, while Wh (watt-hours) measures energy capacity (Ah × V = Wh).

Q3: Should I fully discharge my battery?
A: For most battery types (especially Li-ion), avoid full discharges as they reduce battery lifespan.

Q4: How does battery type affect run time?
A: Different chemistries (Li-ion, Lead-acid, NiMH) have varying discharge characteristics and efficiency.

Q5: Can I connect batteries for longer run time?
A: Yes, connecting batteries in parallel increases capacity (Ah) while maintaining voltage, extending run time.