Our dataset contains electrochemical data from 363 Li(Ni,Co,Al)O 2 /Graphite + SiO x cylindrical 21700 cells cycled for over 2 years (Fig. ). To induce diverse aging trajectories, we explore a broad range of cycling voltage windows and charging and discharging rates (see Section S.2.2 for details). To cleanly compare the effects of different cycling conditions, we apply a standardized, periodic diagnostic cycle to comprehensively probe SOH over cell lifetime (typically every 100 aging cycles -Fig. ). Given the variation of voltage windows and charge and discharge rates throughout the dataset, we compare cell lifetimes using capacity throughput-based equivalent full cycles (EFCs) . In total, we examine 218 unique aging protocols, with EFCs at end of life (EOL) ranging from 44 to 994 (or 63 to 4,641 cycles).