In 1800 – Alessandro Volta dated a letter announcing his invention of the voltaic pile to Sir Joseph Banks, president of the Royal Society, London. We’ve been dealing with battery life ever since.
In 1886 – The first alternating current power plant in the United States began providing power to Main Street in Great Barrington, Mass.
In 1916 – The Annalen der Physik received a paper titled ‘Die Grundlage der allgemeinen Relativitätstheorie’ by Albert Einstein. “The Foundation of the General Theory of Relativity” changed physics and technology dramatically.