Learn how to make a simple lemon battery and use it as an emergency phone charger in this hands-on science experiment. Watch step-by-step as we cut lemons, prepare copper and aluminum electrodes, and ...

Using a galvanised nail and a copper penny as electrodes and lemon juice as an electrolyte can create a rudimentary battery. When the zinc-coated nail is pushed into a lemon, the mild citric acid in ...