1) Defective battery cell policy; does it self detect these and do you replace it or can the user?
2) Expected wear loss on batteries within warranty? (Example: down to 50% capacity is it covered?)
3) Out of warranty and old-age worn out batteries:
Replacement? Dealer, Service, Customer?
Expected lifespan info (rather than just stating warranty.)
4) Upgrades? 1st Party, 3rd Party, Customer?
The car may last a long time but if the battery will be off limits after 10 years... then it is planned obsolescence. Battery electronics: all questions again. Promise to sell upgrades (or help 3rd parties) when old battery tech is no longer available for an old model? I'd rather pay to "refresh" than replace a car; especially when rust can't ruin the frame. Stop disposable products.