these are made from 3 types of salt a magnesium rod and a peice of copper pipe. can run for years without fail.
Crystal Cells Have Been Going for 4+ Years! – Crystal Cells Duration Testing Update – YouTube
Battery Systems
- Saltwater

I remember reading powdered aluminum is also react with water to make heat.
- lithium ion
- forklift and golfcart battery
- https://batterybro.com/blogs/18650-wholesale-battery-reviews/77975750-how-to-store-18650-batteries-safely
- ford escape batteries seem really good for winter applications – nickle hydride
- hydrogen fuel cell and tanks
- natural gas – corncob tanks ?
Food Storage
https://www.costco.com/Emergency-Food-ARK-1-Month-Supply-390-Servings.product.100102033.html
Kenetic Energy
- flywheel
- hydro storage
- storage of weighted blocks above and below ground.
Thermal
- hotwater tank
Chemical
- hydrogen
- methane – biogas above/underground resovior for storing methane.

https://www.genstattu.com/catalogsearch/result/?q=16000 i have seen batteries like this combined for aircrafts if you need portable power.
https://www.youtube.com/watch?v=ZyfXvFicp8M free power from powerlines
Grid Solutions
grid tie inverters – put it into the powerlines and pull it back out whenever, almost essential for cold climates. nice to have either unlimited on demand gas or electricity and not everyone has wood stoves anymore.
salt saolid state battery technology is starting to be a thing
https://www.youtube.com/watch?v=UDjgSSO98VI – battery using rust. “1/10th the cost of lithium ion” – video