I need your help for cyclic charge discharge measurements using Gamry 3000. I took CV at different scan rates in 1M H2SO4 with potential window 1 V. While performing CCD, it is impossible to perform CCD using potential window 1V. The voltage varies between -2 to +2V. Hence, makes the measurements outside the potential window. Also, bubbles are observed during voltage greater than 1V. Furthermore, there are one point for charge and discharge instead of a curve. When join to points of charge and discharge, its simply straight line representing ideal capacitor behavior which is not true when compared to CV. Valuable suggestion are requested from the researchers to perform the tests accurately.