How do Batteries work

Batteries, an essential tool in modern life. They carry chemical energy and convert that to electrical energy that can power many things such as tools, toys, and walkie talkies. How do these small yet powerful pieces of tech work. To start they have special metals in them that help them with these chemical reactions. As the chemical reactions occur and and a build up of electrons is caused. The electrons are released flowing through the circuit. Batteries are an essential piece of electrical engineering in modern life and without them our everyday lives would be much more different.