An electrical battery is 1 or more electrochemical cells that convert stored chemical energy into electrical energy. Batteries come upwardly inwards many sizes, from miniature cells used to power hearing aids and wristwatches to battery banks the size of rooms that render standby ability for telephone exchanges and computer data centers.
Battery has 2 terminals. One final is marked (+), or positive, spell the other is marked (-), or negative. In normal flashlight batteries, similar AA, C or D cell, the terminals are located on the ends. On a 9-volt or machine battery, however, the terminals are situated side past times side to each other on the overstep of the unit. If y'all connect a wire betwixt the 2 terminals, the electrons volition menstruum from the negative halt to the positive halt equally fast equally they can. This volition chop-chop wearable out the battery as well as tin terminate too endure dangerous, especially on larger batteries. To properly harness the electrical accuse produced past times a battery, y'all must connect it to a load. The charge mightiness endure something similar a light bulb, a motor or an electronic circuit similar a radio.