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.
Automobile manufacturers have identified three types of rechargeable battery as suitable for electric car use. lithium-ion (Li-ion) batteries. Lead-acid batteries were invented in 1859 and are the oldest form of rechargeable battery still in use.