Now it just occured to me,

P2 say the battery will be on a lease at least 9 years .

but the battery and technology is fast evolving right?

after 9 years, will the same technology be used? if there is "improvements" in the battery design, can it fit the chassis? or you stuck with an obsolete battery design ?

Those buyers after 9 years (2nd owner), will they sign a new lease 9 years after with the same "battery" tech?