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.
1 Thiebaut patented the first battery with both the negative electrode and porous pot placed in a zinc cup. 2  1881 - Carl Gassner invented the first commercially successful dry cell battery (zinc-carbon cell).