Interestingly, while the features on this diagonal might be expected to consistently be the most predictive, this is not always the case. For example, the early prediction of R ct is dominated by V charge . Additionally, the early prediction of EFC is dominated by R p , rather than by Q RPT0.2C ; the latter is the metric used to define the EOL cutoff, and thus EFC at EOL. The result highlights the importance of a detailed tracking of battery SOH. While a given degradation mode might dominate the EOL values of certain mechanistic SOH metrics, the best early indicators for the onset of that mode may be a different metric or set of metrics.