1. What is the Battery Life Formula?

The battery life formula calculates how long a battery will last based on its capacity (Ah), voltage (V), and the power consumption (W) of the device it's powering. It provides an estimate of runtime in hours.

2. How Does the Calculator Work?

The calculator uses the battery life equation:

Where:

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

Explanation: The equation converts the battery's energy capacity (Ah × V gives watt-hours) and divides by the power draw to determine runtime.

3. Importance of Battery Life Calculation

Details: Accurate battery life estimation is crucial for designing power systems, selecting appropriate batteries, and ensuring devices meet runtime requirements.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What affects real-world battery life?
A: Temperature, discharge rate, battery age, and efficiency losses can all affect actual runtime compared to calculated values.

Q2: How accurate is this calculation?
A: It provides a theoretical maximum. Real-world results are typically 10-25% less due to various factors.

Q3: Can I use this for different battery types?
A: Yes, the formula works for lead-acid, Li-ion, NiMH, etc., though different chemistries have different discharge characteristics.

Q4: What if my device uses varying power?
A: Use average power consumption or calculate runtime for different power modes separately.

Q5: How do I convert mAh to Ah?
A: Divide mAh by 1000 (e.g., 2500mAh = 2.5Ah).