1. What is Battery Energy?

Battery energy, measured in watt-hours (Wh), represents the total amount of electrical energy a battery can store and deliver. It's a crucial parameter for determining how long a battery can power a device.

2. How Does the Calculator Work?

The calculator uses the battery energy formula:

Where:

• \( Capacity \) — Battery capacity in ampere-hours (Ah)
• \( Voltage \) — Battery nominal voltage in volts (V)

Explanation: This simple multiplication converts the battery's charge capacity (Ah) into energy capacity (Wh), which is more useful for comparing batteries with different voltages.

3. Importance of Battery Energy Calculation

Details: Knowing a battery's energy capacity helps in selecting the right battery for an application, estimating runtime, and comparing different battery types.

4. Using the Calculator

Tips: Enter the battery capacity in Ah (usually marked on the battery) and the nominal voltage (e.g., 3.7V for lithium-ion, 12V for lead-acid). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Wh and Ah?
A: Ah measures charge capacity, while Wh measures energy capacity. Wh accounts for voltage differences between batteries.

Q2: How do I convert Wh to mAh?
A: mAh = (Wh × 1000) / V. For example, a 3.7V 10Wh battery ≈ 2702mAh.

Q3: Why is energy in Wh important?
A: It allows direct comparison of batteries with different voltages and helps estimate device runtime more accurately.

Q4: What's a typical Wh rating for smartphone batteries?
A: Most smartphone batteries range between 10-20Wh (e.g., 3.7V × 3000mAh = 11.1Wh).

Q5: How does this relate to kWh in electric vehicles?
A: EV batteries use the same principle but on a larger scale (e.g., 400V × 50Ah = 20kWh).