You need to figure in resistance also. The formula is I=E/R. Current (I) = Voltage (E) divided by Resistance (R). At the same resistance, if voltage goes up, so does current.
Q=It, or charge = current x time. W=VQ, or work done = charge x voltageTherefore, substituting equation 1 into equation 2,W=VIt, or work done by a source = the electromotive force or potential...