Cool energy storage stuff: https://www.lowtechmagazine.com/2018/05/ditch-the-batteries-off-the-grid-compressed-air-energy-storage.html
Low Tech Magazine is now one of my favorite websites: https://solar.lowtechmagazine.com/2015/10/how-to-build-a-low-tech-internet.html
I'm probably going to buy their book soon.
Did you know that with the Librem 5 smartphone you can remove the back and have access to :
- the battery
- a removable OpenPGP smart card
- a removable cellular modem
- and a microSD card so you can expand your storage later on
More here:
https://puri.sm/posts/with-purism-products-you-are-in-control/