Tesla Inc (TSLA)

[boston745]

lasts over 500k miles

In theory yes but its a crap shoot if that will be your experience in reality. Theres plenty of stories of people have to replace their batteries under warranty or just as it expires. This is in part due to EM radiation causing dendrite buildup in batteries.

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Surface electromagnetic fields, like whats seen during auroras, interact with lithium batteries causing abnormal dendrite buildup like seen in Arizona Battery plant fire in 2019. That abnormal dendrite growth can pierce battery separators leading to a short and thermal runaway.

Thermoelectric current causes asymmetric growth pattern of dendrites.

thermoelectromagnetic convection occurs in the vicinity of the solid-liquid interface, and vortices are generated between dendritic arms. It is shown that the thermoelectromagnetic convection has a major influence on dendritic morphology.

Cells taken at random from elsewhere in the battery system, and from its twin system at Festival Ranch, showed “lithium metal deposition and abnormal dendritic growth,” DNV GL notes.

"Because the evidence of Lithium metal deposition and abnormal dendritic growth was sufficiently present in the random samples that were analyzed, it was determined to a reasonable degree of scientific certainty to be the anomaly that caused the initial cell failure and ensuing thermal runaway," battery safety expert Davion Hill wrote in the APS report.

Quote Source #1&2
Multi-physics simulation of dendritic growth in magnetic field assisted solidification

https://www.sciencedirect.com/science/article/abs/pii/S001793101930225X

Quote Source #3
https://www.google.com/amp/s/www.greentechmedia.com/amp/article/lg-chem-battery-cell-mcmicken-arizona-fire