For completeness, we repeated our analysis using features originally derived by Severson et al. . Only 7 of the 20 original features were employed; not all features could be derived identically on the charge and discharge data because the charging protocol has three steps, while the discharge protocol has only one. SI Figure shows similar model performance trends as observed in Figure (which uses features developed by Greenbank and Howey ). Errors are noticeably higher compared to Figure (∼ +5% in error for the best performing models), which is expected since the features are not optimized. This analysis confirms that cycling conditions information can bias models, independently of the featurization method.