The internals of the packs can vary over time, so long as they're a standardised size with standardised connections. Ideally, once a pack is degraded, maybe af

The internals of the packs can vary over time, so long as they're a standardised size with standardised connections. Ideally, once a pack is degraded, maybe after a decade, you'll be able to buy less expensive replacements that have more range, or even used packs salvaged from written-off vehicles - rather than scrapping the whole vehicle.