Hearing Aids, Watch Batteies, Coin cell, Lithium Batteries.

助听器，手表电池，硬币状电池，锂电池。

youdao

The action potential is a stereotyped cell. They are the universal coin of information exchange in all nervous systems that have been studied.

动作电位是一种定型的单元，它们在所有已研究过的神经系统中是信息交换的通用钱币。

youdao

It is an inflatable pouch that has a thin-film solar panel with two-coin cell rechargeable batteries.

FORBES: Social Enterprise Spotlight: Portable Solar Lighting

Get some colored LEDs, coin cell batteries and magnets (kits are available online).

FORBES: Magazine Article

Bluetooth low energy runs off a small coin cell battery, lasts about a year, and allows a small tag to send data to a phone.

FORBES: Launching The Internet Of Everything One Startup At A Time