1. What is Battery Run Time?

Battery run time is how long a battery will last when powering a device. It's calculated by dividing the battery's capacity (in amp-hours) by the current draw of the device (in amps).

2. How Does the Calculator Work?

The calculator uses the simple battery run time equation:

Where:

• Ah — Battery capacity in amp-hours
• A — Current draw of the device in amps

Explanation: This simple formula gives the theoretical maximum run time. Actual run time may be less due to battery age, temperature, and other factors.

3. Importance of Run Time Calculation

Details: Knowing battery run time helps kids understand how long their toys or projects will work before needing new batteries.

4. Using the Calculator

Tips: Enter battery capacity in Ah (found on the battery) and device current draw in A (may be listed on the device or power adapter). Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is my actual run time shorter than calculated?
A: Real-world factors like battery age, temperature, and efficiency losses can reduce actual run time.

Q2: What's a typical battery capacity for toys?
A: AA batteries typically have 1.5-3 Ah, while 9V batteries have about 0.5 Ah.

Q3: How can I measure current draw?
A: With adult supervision, use a multimeter set to measure current (amps) in series with the device.

Q4: Does this work for rechargeable batteries?
A: Yes, but rechargeables often have slightly lower capacity than their rated value.

Q5: Why learn about battery run time?
A: Understanding battery basics helps kids design better projects and be more energy conscious.