Batteries (Battery) containing electrolyte and electrode to produce the current Cup, tank or other container or part of a composite container space, device that converts chemical energy into electrical energy. Have positive and negative points. With the advancement of technology, battery refers to small devices that can produce electricity. Such as solar cells. The main performance parameters of the battery electric power, capacity, energy and resistance. Use batteries as an energy source, you can have a stable voltage, current, stable power supply for a long time, under the influence of the outside world very small currents, and the battery is simple in structure, easy to carry, charge and discharge operation is simple, not under the influence of climate and temperature, stable and reliable performance, in every aspect of modern life has a great role to play.