A battery is a useful device widely used to convert chemical energy into electricity. If we place an electric appliance in between its terminals the current produced will power the device. Battery is an indispensable item for many electronic devices and it is essential for devices that require power when no mains power is available. For example, without the battery, there would be no question of mobile phones or laptop computers.
The battery was invented 200 years back and these batteries are found almost everywhere in consumer and industrial products. Some common and practical examples where batteries are used include:
