5E40.25-Fruit and Vegetable Battery


Description: This demonstration uses the chemical properties of two citrus fruits to power a clock.


  • Two fruits (lemons, oranges, etc.)
  • Fruit Clock

Setup Procedure:

  1. Just remember that you need to get the fruit
  2. You’re going to need two of whatever fruit you were able to find in the previous step
  3. Place whatever fruit you found into the two cups beside the clock

Demonstration Procedure:

  1. Show that the clock is not on.
  2. Stick the copper and galvanized steel electrodes into a fruit as shown in the picture.
  3. Note that the clock is now being powered off two fruit.