1. What is Watt-hours?

Watt-hours (Wh) is a unit of energy that measures the amount of work done or energy used over time. It represents the amount of energy a battery can deliver for one hour.

2. How Does the Calculator Work?

The calculator uses the watt-hours formula:

Where:

• \( Wh \) — Watt-hours (energy)
• \( Ah \) — Amp-hours (battery capacity)
• \( V \) — Voltage (battery voltage)

Explanation: The formula simply multiplies the battery's capacity in amp-hours by its voltage to get the total energy storage in watt-hours.

3. Importance of Watt-hours Calculation

Details: Knowing a battery's watt-hour rating helps determine how long it can power a device, compare different batteries, and ensure compliance with airline regulations for portable batteries.

4. Using the Calculator

Tips: Enter the battery capacity in amp-hours (Ah) and the battery voltage in volts (V). 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 both voltage and current, giving a more complete picture of a battery's energy storage.

Q2: How do I convert Wh to kWh?
A: Divide the Wh value by 1000. For example, 5000 Wh = 5 kWh.

Q3: Why is watt-hour rating important for air travel?
A: Airlines limit lithium batteries in carry-on luggage typically to 100Wh (some allow up to 160Wh with approval).

Q4: Can I use this for all battery types?
A: Yes, the formula works for lithium-ion, lead-acid, NiMH, and other battery chemistries.

Q5: How accurate is this calculation?
A: It provides theoretical maximum energy. Real-world performance depends on discharge rate, temperature, and battery age.