Heinz has a large pickle processing and canning operation in Holland - I think it is, to this day, the largest such operation in the US, if not the world.
Stick dissimilar metals in a pickle, and voila, electric cell! Wire many cells together, battery!
re: Stick dissimilar metals in a pickle
All that’s left to do now is determine which works better, a dill pickle or a sweet gherkin. Scuttlebutt has it the next generation of these cells will use pickled pig’s feet.