A tank of electricity! I hope that will be an expression. I love it when we retain such things (instead of calling it a 'charge') - like 'hang up' on a cellphone.Yes, very true, Britain is ideal place to pioneer electric car uptake, the Island is so small you can drive from anywhere, to anywhere, on one tank of electricity!
(As an aside to this aside: I once heard a Dutch girl say on her cellphone 'ik ga hangen!' = 'I'm going to hang!' Without historical context, that makes absolutely zero sense. It's great!)