Usages of chōngdiàn
我 的 手机 快 没电 了， 我 得 先 给 耳机 充电。wǒ de shǒujī kuài méidiàn le, wǒ děi xiān gěi ěrjī chōngdiàn.
My phone is almost out of power, and I need to charge my earphones first.
她 出门 前 忘 了 给 手机 充电， 只好 又 回 房间 换 了 一 块 电池。tā chūmén qián wàng le gěi shǒujī chōngdiàn, zhǐhǎo yòu huí fángjiān huàn le yí kuài diànchí.
She forgot to charge her phone before going out, so she had no choice but to go back to the room and change the battery.
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