1. What is the Battery Life Equation?

The battery life equation estimates how long a rechargeable battery will last under a specific load. It calculates the theoretical runtime in hours based on the battery's capacity, voltage, and the power consumption of the device.

2. How Does the Calculator Work?

The calculator uses the battery life equation:

Where:

• Rechargeable Capacity — The battery's capacity in amp-hours (Ah)
• Voltage — The battery's nominal voltage in volts (V)
• Load — The power consumption of the device in watts (W)

Explanation: The equation converts the battery's energy capacity (in watt-hours) and divides it by the power consumption to determine runtime.

3. Importance of Battery Life Calculation

Details: Accurate battery life estimation is crucial for designing power systems, selecting appropriate batteries for devices, and predicting runtime for portable electronics.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all battery types?
A: This provides a theoretical maximum. Real-world performance may vary due to temperature, discharge rates, and battery age.

Q2: How does battery chemistry affect the result?
A: Different chemistries (Li-ion, NiMH, etc.) have varying discharge characteristics, but the basic calculation remains valid.

Q3: Should I include inverter efficiency for AC loads?
A: Yes, for AC systems, divide the result by the inverter's efficiency (typically 0.85-0.95).

Q4: Are there limitations to this equation?
A: It doesn't account for voltage drop during discharge or the battery's depth of discharge limitations.

Q5: Can I use this for battery packs?
A: Yes, use the total capacity and nominal voltage of the entire pack.