Energy from lemons
Have the batteries in your torch run out? Never fear! Make a battery from lemon and let your light shine.
3 lemons
3 electric wires
3 (galvanised) screws
3 5-cent coins
A mini LED lightbulb
A knife
Get started
So what do you know now?
A lemon is packed with citric acid. This acid allows electricity to flow through a lemon. The coins are made of copper and the screws contain zinc. Both these metals are good conductors of electricity. When you connect the lightbulb, the electricity passes through the wire, the coins, the lemon and the screws, and the light comes on. See what happens when you connect another lemon. Can you make a battery using another type of fruit or vegetable?