A battery by definition is a collection of cells. So the cell is a little can of chemicals. And the challenge is taking a very high-energy cell, and a large number of them, and combining them safely into a large battery. ↗
During my participation in the Manhattan Project and subsequent research at Los Alamos, encompassing a period of fifteen years, I worked in the company of perhaps the greatest collection of scientific talent the world has ever known. ↗
Imperialism was genuinely popular among Athenians who would expect to share in its profits, even if only indirectly and collectively, and not to have to bear its burdens. ↗