A battery is a device that stores electrical energy in the form of chemical energy and releases it when needed. It is typically made up of one or more electrochemical cells, which convert chemical energy into electrical energy. Batteries are used in a wide range of devices, from small electronic devices like watches and smartphones to larger systems like electric vehicles and renewable energy storage systems. They are classified into primary and secondary batteries, with primary batteries being disposable and secondary batteries being rechargeable. Primary batteries are typically used in low-drain devices and are not intended for recharging, while secondary batteries are designed for multiple use and can be recharged using an external power source
