Similar to the GCD data discussed in Section 1.1, the CV datasets consisted of one from an almost ideal supercapacitor (File 3), which displayed a rectangular CV profile, and another from a non-ideal device (File 4), which displayed a quasi-rectangular CV profile. As with the non-ideal GCD dataset (File 2), several groups raised concerns regarding calculating capacitance for File 4. As noted previously, capacity may be a more suitable electrochemical property for non-ideal devices. This echoes previous reports on best practices, and the non-ideal behaviour resulted in a more significant variation in results when calculating capacitance for File 4 than File 3 .