Dimensional Analysis. Dimensional Analysis (also called Factor-Label Method or the Unit Factor Method) is a problem-solving method that uses the fact that any number or expression can be multiplied by one without changing its value. It is a useful technique.
In 1887, the first dry cell battery was invented. Unlike previous batteries, it used a paste electrolyte instead of a liquid.
In 1802, William Cruickshank designed the first electrical battery for mass production which resembled the flooded battery we still use. In 1859, Gaston Plante invented the first rechargeable battery based on lead acid system which is still very popular and hence came the first secondary cell. In 1899, Waldmar Jungner invented the Nickel-Cadmium battery using Nickel for cathode and Cadmium for anode.