How the Lemon Battery Works


Setup of the Lemon Battery

  • A lemon battery requires an acidic fruit (lemon), a penny, a piece of zinc or a steel paper clip, two wires and a voltage meter. Two slits in the lemon hold the penny and and piece of zinc, each wrapped in their own wire. The ends of these wires connect to a multimeter to measure the volts and amps produced by the lemon battery. Some experiments connect several lemons together then wire them to a digital clock.

What Happens

  • Acid from the lemon reacts with the two metals. Copper and steel (or zinc) act as electrodes in the acid from the lemon. The different metals allow for atoms from one to move through the lemon to the other metal. This atomic movement cannot continue indefinitely and once it stops, the battery dies. As the atoms move, they lose electrons, which flow through the wires, producing electricity.

Electricity Production

  • Electricity requires a flow of electrons. Lemon batteries use chemical reactions to generate this electron flow. This conversion of chemical to electrical energy makes the lemon battery a voltaic battery. Voltage generated from a single lemon typically only registers 0.7 volts and to power a digital clock or watch requires at least two lemon batteries wired together.


  • Photo Credit Theresa knott/
Promoted By Zergnet


You May Also Like

  • Lemon Battery Facts

    The goal of making a lemon battery is turning chemical energy into electrical energy, creating enough electricity to power a small LED...

  • How to Make a Lemon-Powered Light Bulb

    A lemon-powered light bulb is a great science project or even a great green solution for camping or power outages. The acid...

  • Science Projects With Lemons & Electricity

    Lemon is a citrus fruit with a high acid content. High acidity makes it suitable to work as an electrolyte and capable...

  • Potato Vs. Lemon Battery

    Potatoes and lemons both work well in science projects where you want to find electricity at work inside a food item containing...

Related Searches

Check It Out

How to Build and Grow a Salad Garden On Your Balcony

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!