1. The problem statement, all variables and given/known data An electron moves from the positive to the negative terminal of a battery (9V). How much potential energy did it gain or lose? 2. Relevant equations 3. The attempt at a solution Solving for the amount is basic. That's just qV = 14.4 * 10^-19 J I'm not sure whether it will gain the energy or lose it. I believe that since the positive terminal is at a higher potential, a positive charge would lose energy, and therefore, the electron will gain energy. But the answer at the back says that it would lose energy. I'm not sure what's wrong.