• "Class 2" features: derived from the discharging data during aging This classification scheme is generalizable to other battery datasets. Specifically, "Class 1" features are those that encode aging conditions either through cycling or through calendar aging . "Class 2" features rely solely on regions of the cycling curves that are kept constant across all cells. This can be a diagnostic or check-up cycle, performed at regularly spaced intervals, to probe the state of degradation . Including a reset cycle at the start of such check-up cycles is essential to erase any explicit information about aging conditions. In the Severson dataset, there is no reset cycle between the charge and the discharge, but the CCCV at the end of charge is kept constant across all cells and prevents any explicit information leakage to the discharge data.