[header] How to create a battery from a lemon [title] Gather your materials. [step] To make a lemon battery you will need a copper penny, a galvanized nail, a lemon (10 total), a knife, and a voltmeter. Adult supervision is recommended, especially while handling the knife. 
Rinse the penny with a light detergent to ensure you are working with a clean surface. Any lemon will do, but a lemon with a thinner rind will make a better battery.