The electrodes of batteries are labeled + and –. the is labeled and occurs there.

Anode, -, oxidation
Cathode, +, reduction

How I remember which is which:
-Anode: A-Negative-Ode (electrode).

-Because it’s negative, oxidation must occur here (oxidation is an increase in state, like -3 to +3, so electrons are lost from the atom), and with the extra electrons, it’s more negative than the cathode.

-Cathode is opposite of anode, so reduction and positive.