1. What is Ah and mAh?

Amp-hours (Ah) and milliamp-hours (mAh) are units of electric charge that indicate a battery's capacity. 1 Ah equals 1000 mAh. These measurements tell you how much current a battery can provide over time.

2. How Does the Calculator Work?

The calculator uses the simple conversion formula:

Where:

• \( Ah \) — Amp-hours
• \( mAh \) — Milliamp-hours (1 Ah = 1000 mAh)

Explanation: The formula converts between the larger amp-hour unit and the smaller milliamp-hour unit used for many portable devices.

3. Importance of Battery Capacity

Details: Knowing a battery's capacity helps estimate how long it will power a device. Higher mAh/Ah ratings mean longer runtime between charges.

4. Using the Calculator

Tips: Enter the amp-hour (Ah) value to convert to milliamp-hours (mAh). The value must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Ah and mAh?
A: They measure the same thing but at different scales. 1 Ah = 1000 mAh. Ah is used for larger batteries (cars, solar), mAh for smaller ones (phones, power banks).

Q2: How do I calculate battery life from mAh?
A: Divide mAh by your device's current draw in mA. For example, a 2000mAh battery powering a 100mA device would last ~20 hours.

Q3: Why are phone batteries measured in mAh?
A: Because their capacities are typically in the thousands range (e.g., 3000-5000mAh), which is more convenient than saying 3-5Ah.

Q4: Can I convert mAh to Wh?
A: Yes, but you need the battery voltage: Wh = (mAh × V) / 1000. This gives energy capacity rather than charge capacity.

Q5: Does higher mAh always mean better?
A: Higher mAh means longer runtime but often results in larger/heavier batteries. The best balance depends on your needs.