this weighsjust under 25 kilos. that's roughly about the luggage i would take on a 2—week holiday and you are expecting me to carry that in my beautiful electric vehicle wherever i go. that's going to affect the efficiency of this vehicle, isn't it? not really. if you put it in context, that weighs less than 2% of this nissan leaf so the impact is marginal. there's a lot of talk about battery—powered technology being maybe disposable, throwaway, doing a lot of damage to the planet. how long will that actually last me? so if you were to charge every day, this will last you almost four years but, at the end of its life, we will take the batteries and use them elsewhere for energy storage. 0k, and the moment, it'sjust a prototype? shouldn't get too excited, should we? we brought this to showcase at cop but also it's its first global premier here at the bbc. it will be available for anyone to buy next year.