Tiny biobattery with potential 100-year shelf life runs on bacteria

https://phys.org/news/2023-04-tiny-biobattery-potential-year-shelf.html

"rapidly activated absorbing moisture from air,... dime-sized fuel cell Kapton tape sealed... -500 to 750 °F... tape removed and moisture allowed, bacteria mixed with germinant encouraging microbes to produce spores... energy powered LED... heat activated spores cut time to full power from 1 hr to 20 min, and increased humidity higher electrical output. After week of storage at room temperature only 2% drop power generation... needs to power up more quickly and produce more voltage to become viable"