How does a lemon make electricity?

A battery is a simple mechanism that consists of two metals in acid. The zinc and copper of the nail and copper hooks become the battery's electrodes, while the juice of the lemon serves wonderfully as the acidic conductor needed to help these two metals work together, thus creating power. The negatively charged electrons flow through the nail to the calculator, providing the power to make the calculator work. They then flow through the copper wire back to the positively charged hook to create an electronic circuit. The acidic lemon juice serves as the conductor that allows the electrons to flow in this way.