So I understand that a battery consists of an anode, cathode, and electrolyte. Question: What is the function of the electrolyte? Can we use a conductor instead of an electrolyte like some kind of metal? If so, why don't we? Now for a penny and nickel battery stacked on top of each other you have a penny, electrolyte (wet cardboard), nickel, penny, electrolyte, nickel, etc. I have three questions: 1) Why is there no electrolyte between nickel and penny? (Look in the middle and you'll see what I mean) 2) Will it work if there was an electrolyte there? 3) Will it work without any electrolytes between any of the pennies and nickels?