Hand battery is a simple but intriguing exhibit that shows that the human body is not only a conductor but could also produce electricity. The exhibit consists of two metal plates, one made of copper, the other of aluminum. Both are connected to an electric gauge. When the user firmly presses on the metal plates with each hand, the electricity is produced as shown in the gauge. Chemical reaction takes place between the metal plates and the hand that cause electric charges to accumulate and flow through the wires. Users take turns and compare which one can produce more electricity.

Hand Battery is available in the "I AM a Scientist" travelling exhibit package.