Quiz #11: Which battery stores the most energy?
// QUIZ · PICK YOUR ANSWER
Which battery stores the most energy?
// LESSON NOTES
Answer: C — the phone battery! ✅
Energy = volts × amp-hours (watt-hours, Wh):
📱 Phone: 3.85 V × 4.5 Ah ≈ 17 Wh
🔋 AA (alkaline): ≈ 3 Wh
🔋 9 V: ≈ 4–5 Wh — the most volts, but a small tank!
So one phone battery holds about as much energy as 6 AAs. Compare Wh, not just volts. ⚡
Next quiz: what does 50 Hz mean? Comment your answer! 👇
Want the details? Lessons on learn.pablochtech.com
Read the voiceover (transcript)
- Which battery stores the most energy?
- A double-A, a nine-volt, or a phone battery?
- It's C, the phone battery!
- Energy is volts times amp-hours. The phone: about seventeen watt-hours!
- A double-A: about three. The nine-volt: four or five!
- Next quiz: what does fifty hertz mean? Comment your answer!
Related lessons
// NEWSLETTER · FREE
Get new lessons + early access to the full course
One email when new lessons drop. No spam, unsubscribe any time.
✓ You're on the list! We'll email you when new lessons drop.
By joining you agree to the privacy policy.