Therefore, the flow of electrons found in redox reactions can somehow be transformed to do useful work. So an electrochemical cell is simply a way to capture this useful work produced by the movement of electrons from one atom to another. Now, we're going to talk about special types of electrochemical cells called voltaic cells, also known as batteries. Now, these types of cells contain oxidizing reducing agent pairs connected by a conductor such as a wire. And this conductor allows electrons to flow from one atom to a second atom. Now, let's look at a layout of a voltaic cell.