Battery

A battery is a device that stores electrical energy and transforms it into usable power. It consists of one or more electrochemical cells that convert chemical energy into electrical energy through a chemical reaction. When connected to a circuit, a battery provides a flow of electrical current, powering devices like smartphones, flashlights, and vehicles. Batteries come in various types, including rechargeable (like lithium-ion) and non-rechargeable (like alkaline). Their performance is measured by voltage (the potential energy) and capacity (the amount of energy stored), influencing how long and how effectively they can operate electronic devices.