1. What Is This Calculation?

This calculator determines the capacity (in ampere-hours) of a 100 watt-hour lithium battery based on its voltage. It's useful for comparing batteries with different voltages.

2. How Does The Calculator Work?

The calculator uses the formula:

Where:

• 100 Wh — Fixed energy capacity
• Voltage — Nominal voltage of the lithium battery

Explanation: The formula converts watt-hours to ampere-hours by dividing by the battery voltage.

3. Importance Of Capacity Calculation

Details: Knowing the ampere-hour capacity helps compare batteries of different voltages and estimate runtime for devices.

4. Using The Calculator

Tips: Enter the nominal voltage of your lithium battery (typically 3.7V for single cell, 7.4V for 2-cell, etc.). Voltage must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 100 watt-hours?
A: 100Wh is a common benchmark for portable batteries (airline limit for carry-on is typically 100Wh).

Q2: What's typical voltage for lithium batteries?
A: Single cell: 3.7V nominal (4.2V fully charged), multi-cell batteries multiply this (e.g., 2-cell = 7.4V).

Q3: Does this work for other battery chemistries?
A: The formula works for any battery type, but voltage ranges differ (e.g., lead-acid is 2V/cell nominal).

Q4: How does capacity relate to runtime?
A: Runtime (hours) = Capacity (Ah) / Device current draw (A). Higher Ah means longer runtime at same voltage.

Q5: What affects actual battery capacity?
A: Temperature, age, discharge rate, and battery health all affect real-world capacity.