I have just found information that says you can make batteries from dissimilar metals, glass jars and acid fruits that produce vinegar when fermented. This method was used for metal plating before Christ. Does anyone know how to make these batteries? Would they be capable of providing the light needed for hydroponics after the pole shift?
Offered by Jan.
There are many ways to make batteries. Generally speaking, you'll be lucky to get .5v to 2.2v per cell at a few micro amps. You can string many together to get a higher voltage, but they don't generally last very long and you would be spending a lot of effort for not a lot of return. The closer you can stick with lead and sulfuric acid in battery design the better longer-lasting results you'll get. I certainly wouldn't want to turn you off from a good idea, but you might not be happy with the results.
Offered by Steve.