They are also known as button cells are
used for cell configuration for the evaluation of battery materials. It is fast
and gives reproducible results. It avoids the complicated replacement while
taking a minimum amount of materials. Coin cells are composed of stainless
steel. The assembly includes the top cover bottom, container, steel spacer, and
steel spring. They are also efficient in the development of rechargeable
batteries and electrodes. However, they are dangerous for children as when
swallowed; they can cause internal burns leading to significant injury or
death.