1. What is the Battery Life Equation?

The battery life equation calculates how long a battery will last based on its energy capacity (watt-hours) and the power consumption rate (watts). It provides a simple way to estimate runtime for various electronic devices.

2. How Does the Calculator Work?

The calculator uses the battery life equation:

Where:

• \( \text{Dot Wh} \) — Battery capacity in watt-hours
• \( \text{Dot W} \) — Power consumption in watts

Explanation: The equation divides the total energy stored in the battery by the rate at which energy is being consumed to determine how many hours the battery will last.

3. Importance of Battery Life Calculation

Details: Accurate battery life estimation is crucial for designing power systems, planning device usage, and selecting appropriate batteries for specific applications.

4. Using the Calculator

Tips: Enter battery capacity in watt-hours and power consumption in watts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and W?
A: Watt-hours (Wh) measure energy capacity (total amount), while watts (W) measure power (rate of energy use).

Q2: How accurate is this calculation?
A: It provides a theoretical maximum. Real-world factors like temperature, battery age, and efficiency losses may reduce actual runtime.

Q3: Can I use this for any battery type?
A: Yes, as long as you know the capacity in watt-hours and the device's power draw in watts.

Q4: What if my device lists current (amps) instead of watts?
A: Multiply voltage by current (amps) to get watts. For example, 5V × 2A = 10W.

Q5: How do I find my battery's watt-hour rating?
A: Check the label - it's often listed. If you see mAh and voltage, multiply them and divide by 1000 (e.g., 3000mAh × 3.7V ÷ 1000 = 11.1Wh).