Get Your Free Activity

First Name
Last Name
You're in! Thanks for subscribing.
Error - something went wrong!

A battery of hands-on science fun with this free Orange Clock activity

All Grades


Batteries are essential to making our widgets work, and gadgets go! Without batteries, your favorite device has no life. Download the free Orange Clock activity above to jump-start your students’ excitement for lessons about how batteries work.  No, seriously, the activity is free of charge!

We’re positive your students will get a boost from using fruit to demonstrate how batteries convert stored chemical energy into electrical energy.

Before jumping into the activity, let’s look at the basics.

What is a battery?

A battery is one or more electrochemical cells in which chemical reactions create a flow of electrons in a circuit. Dry cell is one of many types of electrochemical cells powering our electronic gear. The electrolyte is immobilized as a paste in a dry cell, with only enough moisture for the current to flow. Unlike a wet cell (which usually consists of sulphuric acid and water electrolyte), a dry cell works in any orientation without spilling, making them safer to handle.

It converts stored chemical energy into electrical energy.

The key components of a battery cell include:

  • Two terminals made of different chemicals (typically metals), the anode and the cathode;
  • The electrolyte, which separates these terminals.

The electrolyte is a chemical medium that allows the flow of electrical charge between the cathode and anode.1

A chemical reaction within the battery causes the anode to build up excess electrons. This causes an electrical difference between the anode and the cathode. The electrons try to rearrange themselves and displace the extra electrons in the cathode. However, the electrolyte ensures the electrons can’t travel directly to the cathode.

When the circuit is closed (with the help of a “conductive path” between the anode and cathode), the electrons can travel to the cathode. Along the way, it sends power to our widgets, gadgets, and devices.

Download the Orange Clock activity above; it’s “AA fun way to illustrate concepts on electrochemistry, cell potential, metal activity, and anode vs. cathode electrodes.

References: 1. How Does a Battery Work? - MIT School of Engineering


Recommended products:


Fruit and Potato Clock

LCD clock keeps time using potatoes, soda, or plants to demonstrate an electrochemical cell.

Shop Now




Ward's® Chemical Battery Demonstration

An easily constructed battery is built using two chemical solutions and two metal electrodes in an Erlenmeyer flask. Produces 1.5 V that can power a small LED.

Shop Now




Primary Battery Kit

A simple, inexpensive little kit demonstrates how a battery works, how current flows, and how chemical energy can be turned into light energy.

Shop Now




Battery Electrodes

Shelf Life: Indefinite

Shop Now


Previous Flipbook
It's easy to gauge science fun with this free Under Pressure activity
It's easy to gauge science fun with this free Under Pressure activity

This activity helps students investigate Boyle's law and the behavior of colloid particles when exposed to ...

Next Flipbook
Endangered species facts worth saving; Plus a free student handout from McGraw Hill's AccessScience
Endangered species facts worth saving; Plus a free student handout from McGraw Hill's AccessScience

Students can explore wildlife conservation, why it's important, and methods used to address biodiversity loss.

Save 15% on Science Supplies this Month

Get the Promo Code