Mr. Graham Brennan:

Sure. It is a good question. How does one convey battery ageing to the consumer? In the early days, as a Nissan Leaf, for example, aged, it lost a bar on the display. Each bar represented an equal amount of energy. I have not seen that on modern cars. I think that is because the manufacturers are putting overcapacity in the battery. They know the battery will lose 1% or 2% of its storage each year. One is not seeing that because the manufacturers are compensating for it and to cover themselves in the context of the warranty. EVs usually have an eight-year warranty, approximately, for the battery. I am not aware of anyone having explained a standard test. That should go into the homologation process for the cars. There should be something that sets out how we categorise a battery. At the moment-----