kevmo back up a bit on this ‘power density’.
tell us first what is a watt and what is a joule.. if you can’t anwer that you’ve got no business installing batteries in flashlights let alone lecturing knowledgable people on power generation.
Tell us why you’re backing up a poster who didn’t know the difference between Amps and Watts. How many zillions of people die each year because they generate millions of Watts by walking across the carpet? Then we can back up like you ask.