While it may seem incredible, if you don't have a standard battery, you can use one of the potatoes you keep in your pantry. Do not you believe it? Then continue reading this tutorial to find out what are the steps to follow.
Steps
Step 1. Get all the necessary items
A detailed list is available in the 'Things You Will Need' section.
Step 2. Take your potatoes and mark one with the letter 'A' and the other with the letter 'B'
Step 3. Insert a galvanized nail into one end of each of the two potatoes
Step 4. Do the same step using the copper nails, but insert them at the opposite end of each potato
Make sure that the two nails of each potato cannot touch each other.
Step 5. Remove the plastic panel covering the battery compartment of a watch
Make sure the batteries are not missing, and remove them if necessary. Note the polarity (+ and -) of the electrical contacts.
Step 6. Connect one end of the first electrical wire to the copper nail of the potato 'A', and the other end to the positive ('+') connector in the clock battery compartment
Step 7. Connect one end of the second electrical wire to the galvanized potato nail 'B', and the other end to the negative ('-') connector in the clock battery compartment
Step 8. Connect one end of the third electrical wire to the galvanized nail of potato 'A', and the other end to the copper nail of potato 'B'
Step 9. All three electrical wires should have found their place in the circuit, and the clock should have magically resumed running
The movement of the clock is generated by the electrical charge present in the potatoes!