A Tesla is full of brilliant engineering. Well. Kind of.

I turns out that the Model S has a conventional car battery. Which can fail, even while the car is plugged into a charger. That’s because once the big battery for the motors is charged, the charger will turn off and stop topping off the conventional battery that powers the computers, car locks etc. Which means that can eventually run flat, just like in one of those horrible, old-fashioned patrol cars. But unlike with one of those old-fashioned petrol cars, you have to actually partially disassemble a Tesla to get to the battery to charge it manually so that you can use your car again. Which, meanwhile, was sitting on a huge battery, fully charged and fully ready to drive off. Hilarious.