One of the biggest problems with electric vehicles has always been (and likely always will be) the charging time, not so much for local journeys but more for those who cover very large distances or even those that need to do sudden unexpected journeys or are simply poor at keeping an eye on their battery level. I've always wondered as battery technology improves, would it be possible to have some sort of universal battery pack/packs say the size of a briefcase or suitcase that could simply be removed from under the bonnet and exchanged at a 'fuel station' for one that is fully charged. This would take but a minute, if that. Much more convenient than waiting for half an hour to get to 75% charge before continuing with your journey. Another advantage I think is that this would eliminate the cost (and of course emissions produced) by having to rebuild every carpark and driveway in the country to accept a charging point. In terms of materials however the additional batteries would still have to be produced, which would also create emissions.
I suppose drawbacks would be the weight and size of a couple of battery packs. Maybe there could be 'leccy techys' on site to assist if required for those who possess a lesser 'hand on' ability.
Just a thought.