Ever heard of a fruit battery? Batteries are the most common source of electricity especially for smaller gadgets It does not take long to create your fruit battery! When you inserted the galvanized or zinc nail into the fruit, the negatively charged to move from the fruit to the zinc nail thus leaving the protons in the fruit. A lemon battery is a simple battery often made for the purpose of education. Typically, a piece After one cell is assembled, a multimeter can be used to measure the voltage or the electric current from the For a more visible effect, lemon cells can be connected in series to power an LED (see illustration) or other devices. Making Batteries from Fruits and Vegetables" at this link: You can narrow down good fruit/veggie candidates by researching ones that (I'll leave the research as to which two types work best up to you) or the reaction will not work. How long before you deplete the power potential of an individual cell?