Batteries you can refill
Recharge and reuse, until they wear out.
A phone battery
A phone battery can be charged again and again. But after a year or two, it needs charging more often.
Why do you think that happens?
What this lesson covers
The idea
Rechargeable batteries can be recharged and reused multiple times, but after being charged and used many times they slowly wear out.
A phone battery
A phone battery can be charged again and again. But after a year or two, it needs charging more often.
Why do you think that happens?
- It slowly wears out
- It grows bigger
- The phone is lazy
Use and recharge
Press Use it. Then press Recharge. Do it 6 times. Watch the red line.
Reuse, but not forever
Each time the battery was recharged, it could be used again. Slowly it held less. After many cycles it wore out.
Rechargeable batteries can be recharged and reused many times. This prevents wastage and saves money over time. But after being charged and used many times, they slowly wear out.
Notes
Rechargeable batteries can be recharged and reused many times, but after many charges they slowly wear out.
Check yourself
Which of these can be recharged and reused many times?
A phone battery needs charging more often after a year or two. Why?
A good thing about rechargeable batteries is that they …
Do rechargeable batteries last forever?
- A used up dry cell. A dry cell is a single use cell. It has to be disposed of.
- A dead cell. A dead cell cannot supply electricity. A rechargeable battery can be recharged.
- A rechargeable battery — correct. Yes!
- It has slowly worn out after being charged many times — correct. Yes!
- It has learnt to use more power. A battery does not learn. Many charges slowly wear it out.
- The phone has grown bigger. The phone does not grow. The battery slowly wears out.
- never wear out. Rechargeable batteries also do not last forever. They slowly wear out.
- prevent wastage and save money over time — correct. Yes!
- are used only once. They can be recharged and reused many times.
- Yes, they last forever. After being charged and used many times they slowly wear out.
- No, they cannot be recharged at all. They can be recharged and reused many times, but not forever.
- No, they slowly wear out — correct. Yes!