Now, whenever we talk about the EMF of an electrochemical cell, we could also call our EMF the cell voltage because we're talking about an electrochemical cell. And the cell voltage shows how much work can be done for every coulomb produced by a redox reaction in an electrochemical cell. So that basically says that when in an electrochemical cell, one coolant of charge moves from the anode to the cathode, x amount of work can be done. So let's now look at the difference between this battery or this electric chemical cell and this smaller electrochemical cell. So let us examine the difference between this D battery and the AAA battery. Well, according to this label, it says that our electromotive force of this deep battery is exactly 1.5 volts.