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.
Patrick Lockerby. Most people, including many scientists and electrical engineers, have never heard of Wilhelm Josef Sinsteden. He invented the lead-acid battery and published his findings in 1854. In 1860 an improved construction by Gaston Raimond PlantÃ© was the first commercially viable version.