This work also finds that the spread of reported total capacitance values calculated from CV datasets is greater than that from GCD datasets. This can be seen by comparing the standard deviations for the reported total capacitance values from File 1 (1.5%) and File 3 (4.0%), a GCD and CV dataset from an ideal device, respectively. This shows that calculating performance metrics from GCD datasets is more reliable than from CV datasets. This is primarily due to the large variation in methods for integrating the discharge curve of the CV. This study, therefore, recommends that researchers use GCD datasets to calculate performance metrics instead of CV datasets where possible. CV data should primarily be used to qualitatively assess the charge storage mechanism of the supercapacitor. The mean value for the middle group is not reported as these values have been calculated using an incorrect equation.