Then wait till you hear the price they want to sell the battery to you.
Aprox. 3900£ !!!
Thats a whooping 30% more expensive per kWh than the new Zoe battery.
(Which wasn´t a bargin in its own right)
They will sell you the battery, but then make shure , you better not want to.
Ohh! And the capacity guaranteed to 50000km and 5 years is 60%!!!