[ratsforhorses]

I found this in my archives http://www.ecomowtech.com/hardware.html it's probably 8 years old, lovely idea, wonder if they ever did something with it... tangentially maybe microbial batteries could one day become efficient enough or be used in places where slow is ok https://en.m.wikipedia.org/wiki/Microbial_fuel_cell

[berkes]

Looks very much Fi in SciFi to me.

Not saying that it cannot work, but this has so much hurdles to overcome before being something that can work, let alone be produced (at home) or mass-produced and sold, that its at most "really interesting".