Could someone explain the concept of a battery I've looked it up in my text book and wikipedia, but it doesn't really help Here is what I think I understand 1. Charges (electrons) are made in the cell by chemical reactions 2. They complete the circuit by leaving one of the terminals and returning to the other. So my questions are 1. Which terminal are the charges made at and which terminal do they leave to go through the circuit? 2. After completing the circuit, how do the charges move from one terminal of the battery to the other? 3. How is potential difference involved in this?