Discovery of batteries

Zinc copper cell (reduction-oxidation)
Battery meter (galvanometer)
Electrolyte test (pure water vs. vinegar)
Reverse electrodes (polarity)
Electrolyte (strong acid test)
Electrolyte (salt test)
Electrode (distance test)
Electrolyte (temperature test)
Electrode (surface area test)
Standard cell
How much electrolyte does a single cell need?
The battery and electromagnetism