- Cathode: the negative terminal
- Anode: the positive terminal
To test the battery, follow the directions from the site. Then take a multimeter and put the negative (-, black) probe on the charcoal, and the positive end (+, red) on the aluminum foil.
- How many volts does it produce?
- How many amps?
- What happens if you crush the charcoal into a powder? Do volts or amps increase?