Button cell

A button cell is a small, round battery that is about the size of a button, hence the name. It is used in a variety of devices, such as watches, calculators, remote controls, and toys.

The button cell has two different parts, the positive and negative ends. The positive end is usually marked with a plus sign (+) and the negative end is marked with a minus sign (-).

When you put the button cell in your device, the positive end touches one side of the device, and the negative end touches the other side. This creates a circuit that allows electricity to flow from the battery to the device.

The button cell is made up of different materials, such as zinc, silver oxide, and lithium. Each type of button cell has a different voltage, which is how strong it is. Some button cells last longer than others, depending on the materials used to make them and how much energy the device needs to run.

It's important to be careful when handling button cells because they can be dangerous if they are swallowed or if they leak. If you ever need to replace a button cell, make sure to use the same type of battery that came with the device, and dispose of the old battery properly.