Do not use a small EV as a donor
Helping a neighbour with a flat battery is a kind reflex, but using a compact EV as the donor car is a poor idea. Its 12V system is fed by a DC converter sized for the car's own modest load, and many EV makers warn against jump-starting other vehicles from it. The surge of cranking a large petrol engine can damage that converter, which is a far costlier repair than any battery.




