Pennies, lemons, and nails combine to convert chemical energy into electrical energy.
Voltaic batteries of all shapes and sizes are devices that convert chemical energy into electrical energy. You probably use batteries to power your cell phone, iPod, or any number of other gadgets. But, you can actually use chemical energy stored in a lemon and two metals to make a current and light up a small LED. It’s true and we’ll show you exactly how it’s done.