But if you connect a 5V battery in parallel with a 4V battery, the 5 will try to charge the 4. So the (+) terminal of the 5V battery will act as a cathode, but the (+) terminal of the 4V battery as anode.
"CCD" -> "cathode: current departs"
In chemistry though, cations are positive ions and anions are negative ions.
"CCD" -> "cathode: current departs"
In chemistry though, cations are positive ions and anions are negative ions.