Dive into the simple production of a battery from evryday objects and learn about the basic principles of electrochemistry. Inside a battery, there are two electrodes surrounded by a liquid or a gel. The two electrodes are always made of different materials, such as zinc and coper. When the two electrodes are connected, tiny particles called electrons flow from one electrode to the other. This releases energy that powers your device. Discover how we can even use lemons to create power.