Flashlight Battery The most common form of primary cell is the Leclanché cell, invented by the French chemist Georges Leclanché in the 1860s. It is popularly called a dry cell or flashlight battery. The Leclanché cell in use today is very similar to the original invention. The electrolyte consists of a mixture of ammonium chloride and zinc chloride made into a paste. The negative electrode is made of zinc, as is the outside shell of …showed first 75 words of 203 total…

…showed last 75 words of 203 total…is used in this form in hearing aids, photoelectric cells, and electric wristwatches. The negative electrode consists of zinc, the positive electrode is of mercuric oxide, and the electrolyte is a solution of potassium hydroxide. The mercury battery produces about 1.34 V. The fuel cell is another type of primary cell. It is unique in that the chemicals are not contained within the cell but are supplied from outside. ------------------------------------------------------------------------ **Bibliography** WWW.flashlight/inventions/batteries.com