I think the answer for the Leaf is no. Nissan doesn't have an incentive to allow this. It is, I'll grant you, more difficult than replacing a 12V. There are hea

I think the answer for the Leaf is no. Nissan doesn't have an incentive to allow this. It is, I'll grant you, more difficult than replacing a 12V. There are heat issues and apparently charger compatibility issues. However, Nissan is in the business of selling cars just as Apple is in the business of selling computers. Repairing and improving old cars+computers is an expense and competes with sales of new cars+computers. In principle, it could happen. In practice, it won't. I'll probably get the batter replaced and keep the car. But I wouldn't buy/recommend a Leaf at this point as there are better alternatives available. A similar issue is right to repair.