coin cell

A **coin cell** is a small, round battery commonly used in watches, calculators, key fobs, and other compact electronic devices. Known for their flat, disc-like shape and long shelf life, coin cells provide reliable power in a compact form factor. They are also referred to as button batteries due to their size and shape, and come in various chemistries including lithium, silver oxide, and alkaline. Coin cells are essential components in everyday gadgets, offering a convenient and efficient energy source.