📖+10 XP
🎧+10 XP
✅+15 XP
Level A1 – BeginnerCEFR A1
2 min
71 words
- Researchers found why batteries lose power.
- Rechargeable batteries expand and contract during use.
- Scientists compare this motion to breathing.
- Tiny shape changes create stress inside batteries.
- Some parts move more than others.
- This uneven motion creates local stress and tiny cracks.
- Over time these cracks reduce battery life.
- Scientists saw these changes with special X-rays.
- Knowing this can help design stronger batteries.
- Better design can make batteries last much longer.
Difficult words
- researcher — person who studies and finds new factsResearchers
- battery — device that stores and gives electrical powerbatteries
- rechargeable — can be charged and used again
- expand — become larger in size or volume
- stress — force or pressure inside a material
- crack — small lines where something breakscracks
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Do you use rechargeable batteries at home?
- Have you ever seen a battery change shape?
- Do you try to make batteries last longer?
Related articles
13 Jun 2023
18 Nov 2025
5 Feb 2026
AI is changing basic health care in sub‑Saharan Africa
Artificial intelligence is already helping basic medical care in parts of sub‑Saharan Africa. Pilot projects in Kenya, Ghana and Rwanda show faster diagnosis, fewer wrong prescriptions and quicker delivery of blood and imaging results.
24 Feb 2026
18 Oct 2025