To celebrate our 100th episode, we have an extended discussion on the history of lithium batteries, which power so many of our portable electronic devices today. Our story starts in 1800, when Jozé Bonifácio de Andralda e Silva found a new mineral near Stockholm, which he called petalite. Lithium batteries, however only began with the great American chemist, Gilbert Lewis, in 1913. We follow the trail through the 1960s and 1970s in Japan, Britain, Germany, and the United States, and the multiple inventors, each devising a piece of the modern lithium battery. Become a Patreon supporter, and download a supplemental sheet with several diagrams for your edification.