1. What is the Battery Life Equation?

The battery life equation calculates how long a battery will last based on its capacity (in watt-hours) and the power consumption of the device (in 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:

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

Explanation: The equation divides the total energy capacity of 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 planning device usage, comparing battery performance, and ensuring devices have sufficient power for their intended use.

4. Using the Calculator

Tips: Enter battery capacity in watt-hours (Wh) and power consumption in watts (W). Both values must be positive numbers. Common battery capacities range from 5Wh (small devices) to 100Wh (laptop batteries).

5. Frequently Asked Questions (FAQ)

Q1: How do I find my battery's Wh rating?
A: Check the battery label. If only mAh and voltage are given, calculate Wh as (mAh × V) ÷ 1000.

Q2: How accurate is this calculation?
A: It provides theoretical maximum. Real-world results may be 10-30% less due to efficiency losses and other factors.

Q3: What affects battery life?
A: Temperature, age of battery, discharge rate, and number of charge cycles all impact actual battery life.

Q4: Can I use this for any battery type?
A: Yes, the calculation works for lithium-ion, lead-acid, NiMH, and other battery types as long as you know the Wh rating.

Q5: Why measure in Wh instead of mAh?
A: Watt-hours account for both capacity and voltage, making comparisons between different battery types more accurate.