Hi, I learned that, when a field does work on something, like when an electric field does work on an electron, it loses potential energy -- much like when a ball falls from a height (gravity is doing work on it) it loses potential energy. Hence, as an electron flows from the negative to the positive terminal of a battery it is losing energy, correct? It would then gain energy when it reaches the negative terminal. At that point the battery would do work (equal to the e.m.f) to move the electron from the negative to the positive terminal. Is this description correct? Thanks in advance!