This morning I searched out the Renault battery Lease agreement and found that neither of us seems to be 100% correct. The text is
here and shows that they have included specific clauses for the sale of the vehicle and that it adds a couple of specific items:
1) You are obliged to inform any purchaser of the battery lease;
2) If you sell to a private individual then you give the name and address of that individual to Renault who them send them an invitation to take over the lease. Until this invitation is taken up you are still obliged to make payments. If for some reason the purchaser does not take on the lease you are stuck with payments until the original end date of the lease.
3) If you sell to a motor trader you must send proof of the sale and details of the trader to Renault who then terminate the lease and make some sort of arrangement with the trader*
4) If the lease ends for any reason (such as the end of the original term, or a breash of anything above) and another lease is not started, Renault disable the pack by instructing it to not allow any more recharging#
* If the agreement with the trader includes the ability for the trader to buy the pack and sell the car as a whole, we need to know as there are lots of people that want a Renault EV, but not a battery lease!
# I suspect that removing the SIM from the car will cause the car to disable the battery. You may be given a short "grace period" to cope with things like network outages.