What is a watch cell battery?

A watch cell battery, commonly known as a button cell battery, is a small, round battery used primarily to power wristwatches and other compact electronic devices. These batteries are typically made of lithium, silver oxide, or alkaline materials, and they come in various sizes to fit different devices. They are designed to provide a steady voltage over a long period, ensuring reliable performance for timekeeping and other functions. Due to their compact size, watch cell batteries are also found in calculators, hearing aids, and small medical devices.