Here's how it works:

* Chemical Energy: Inside a battery, chemical reactions occur between the materials on the anode (negative terminal) and cathode (positive terminal). These reactions release electrons.

* Electrical Energy: The electrons flow through an external circuit from the anode to the cathode, creating an electrical current. This current can then be used to power devices.

So, the chemical energy stored within the battery is transformed into electrical energy that can be used to power our phones, cars, and many other things.