이차전지가 · 이차전지를
secondary battery, rechargeable battery
Example
전기차에는 대용량 이차전지가 들어갑니다.
Electric cars use high-capacity rechargeable batteries.
Word parts
이 two+차 round+전 electric+지 pond
Literally 'second-round battery' — it can be recharged and reused.
Good to know
In business news, 이차전지 often refers to the whole EV battery industry.
Related words