ボタン電でん池ち

noun

button battery; watch battery; button cell

A small, round, flat battery used in watches, calculators, hearing aids, and small electronic devices.

• この時計とけいはボタン電でん池ちで動うごいています。

  This watch runs on a button battery.

• ボタン電でん池ちは小ちいさな電でん子し機き器きによく使つかわれます。

  Button batteries are often used in small electronic devices.