An anode is the positive electrode in an battery. As electrons flow through a closed electric circuit from the cathode to the anode, it experiences a buildup of negative charge. When this cancels out the anode's original positive charge, the battery has been exhausted and is no longer usable.
- ↑ Zumdal, Steven S. Chemistry
- ↑ http://www1.eere.energy.gov/solar/solar_glossary.html