They are connected under the skin to another wire that leads to a small battery placed in the chest.

VOA: special.2009.02.03

see people with them, and what happens here is it's supposed to be those noise cancellation headphones. All they do is they take in the ambient noise that's around it, and there's actually battery in the headphones, that then produces waves that are going to destructively interfere with that ambient noise.

我从来没有用过这个,但你会看到有人带他们,它们可以作为消噪音耳机,它们所做的就是采入,周围的随机噪声，耳机里面是，有电池的，然后它能产生和,随机噪声相干相消的声波。

麻省理工公开课 - 化学原理课程节选

Because whenever I tell this story now, people start saying, " "Oh, well the evil machines are busy using your body as a battery" or whatever it was in the movie, right?

因为现在我一讲这个故事，人们就会说，“邪恶的机器忙着把你的身体当电池“,不管电影是怎样刻画的了？

耶鲁公开课 - 死亡课程节选

They also used a new,lithium-ion battery that is expected to last longer than batteries in current hybrid cars.

VOA: special.2010.11.17

And in two thousand eight, seventeen people died in Senegal after lead exposure from a battery recycling center.

VOA: special.2009.08.31

"So everyone has a sword?" "Assault and battery and you hand me a sword in Shakespeare?

VOA: special.2010.06.03

Others are battery-powered. Experts say these devices should be placed near sleeping areas in the home.

VOA: special.2010.02.02

In addition,the battery placed under the skin may require a replacement.

VOA: special.2009.02.03

"Two-point-four billion dollars in highly competitive grants to develop the next generation of fuel-efficient cars and trucks, powered by the next generation of battery technologies all made right here in the U.S.of A,"

VOA: standard.2009.08.05

"The power source for the aircraft are the two battery packs you see on either side, which are lithium ion batteries which are similar to what you find in our laptops, only custom made for us for this application."

VOA: standard.2010.08.11