Battery Capacity - Amp-Hours, mAh, and Watt-Hours

TL;DR

Learn about the different units used to measure battery capacity and energy storage, including amps, amp-hours, milliamp-hours, and watt-hours.

Transcript

in this video we're gonna focus on battery capacity perhaps you've seen the unit's amps amps times hours milliamps times hours or watts times hours now what do these units represent we're gonna talk about that in this video so let's start with amps amps is the unit of current which is represented by the symbol I amps is short for you could just wri... Read More

Key Insights

• ⏳ Amps represent the current flow in a battery, while amp-hours and milliamp-hours indicate charge capacity, and watt-hours measure energy capacity.
• 🏪 The energy stored in a battery can be estimated by calculating the area under the discharge curve.
• ⚡ Nominal voltage is commonly used to calculate the energy capacity of batteries. However, exact calculations require considering the entire discharge curve.

Questions & Answers

Q: What does the unit "amps" represent in battery capacity?

Amps represent the current flowing through a battery, indicating the rate of electric charge transfer.

Q: How is charge capacity calculated?

Charge capacity is calculated by multiplying the current in amps or milliamps with the time in hours.

Q: What does the unit "watt-hours" signify?

Watt-hours measure the energy capacity stored in a battery, determined by multiplying the voltage by the current and time.

Q: How can the discharge curve of batteries be estimated?

The discharge curve can be approximated by calculating the area under the curve, using the shape of a rectangle or triangle.

Summary & Key Takeaways

• Amps (A) is the unit of current, representing the flow of electric charge.

• Amp-hours (Ah) and milliamp-hours (mAh) measure charge capacity, indicating how much electric charge a battery can store.

• Watt-hours (Wh) measure energy capacity, determining how much energy a battery can provide.