Batteries
A battery is a device that stores chemical energy and converts it into electrical energy when you connect it to a circuit. 🔋 How a battery works A typical battery has three important parts: Anode (negative electrode): where chemical reactions release electrons. Cathode (positive electrode): where electrons are consumed by a chemical reaction. Electrolyte: a substance that allows ions to move inside the battery. When you connect a battery to something like a flashlight: Chemical reactions begin inside the battery. Electrons are pushed through the external circuit. The electrons power the device. Ions move through the electrolyte inside the battery. Eventually, the chemicals available for the reaction are depleted, and the battery stops producing useful electrical energy. 🔋 Main types Disposable (primary) batteries Alkaline AA/AAA Zinc-carbon Lithium primary batteries Used once and then replaced. Rechargeable (secondary) batteries Lithiu...