World's smallest battery can power a computer the size of a grain of dust

https://techxplore.com/news/2022-02-world-smallest-battery-power-size.html

"significantly less than one square millimeter across and integrable on a chip, which still has a minimum energy density of 100 microwatt hours per square centimete... could power the world's smallest computer chips for about ten hours... areas such as the Internet of Things, miniaturized medical implants, microrobotic systems and ultra-flexible electronics"