1. We will need a few things to make a cell.
2. First get two injection bottles. Then cut two 3 cm long bits of thick copper wire. Use sandpaper to scrape about 1 cm of the coating off both ends of the wires.
3. Break open a discharged dry cell and remove its outer metal covering (made of Zinc). Cut two 2 mm wide and 3 cm long strips from this zinc plate.
4. Insert the copper wires and zinc strips separately into the rubber caps of the injection bottles as shown in Fig.
5. Ensure that the copper wires and zinc strips do not touch each other.
6. Now take a wire and connect the zinc plate of one bottle with the copper wire of the other bottle.
7. Fill both bottles with sulphuric acid. Carefully close the bottles with the caps in which the copper wires and zinc strips are inserted.
8. The cell is ready. To test its working take a LED.
9. Attach two wires to its two terminals. Touch the wire from one terminal to the copper wire of the first bottle and the wire from the other terminal to the zinc plate of the second bottle.
10. The LED lights up. It means the cell is working.
