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The invention of the battery has become an important and widely used source of stored electricity. Since the development of the first battery, there has been many changes and improvements made to its design as well as its uses. Modern day society has become dependent on its many uses, most commonly for our luxuries and conveniences. However, in the beginning, the invention was most important to the scientists in there study of electricity. Batteries produce electricity by means of a chemical reaction. A battery consists of cells connected together to produce an electrical force. The basic principle of an electric cell states that electricity can be produced by a combination of two different metals and a solution that would conduct the electricity. A battery is composed of two plates called electrodes. One of the electrodes contains a positive charge and the other a negative. Between the electrodes flows a system of charged particles, called electrons, which is carried by the chemical solution called electrolyte. The electrolyte separates the positive and negative electrodes. The completed circuit is formed when the electrodes are connected by a wire creating the path around which the electricity passes. The reaction of this path on the electrode causes the electrons to produce at a rate which exceeds the capacity of the electrode causing the electrons to flow around the path of the circuit and into the cell of the opposite electrode. This process causes gradual changes to the electrolyte solution therefore eventually rendering the cells unable to produce the current.The measurement

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