Been in a situation where driving with failed alternator in Wira.
Can feel engine gradually loss power, can't do fast acceleration, but can maintain low speed for a while.
Stopped by road side shortly after and call for help.

The foreman determined to be faulty alternator, but was able to just replaced a new battery because I was at outskirt area and he only bought battery.
Was told to drive with aircond turned off, and surprisingly the new battery can tahan for few hundred kilometers with faulty alternator.

If EV can allow driver to glide or drive to safe place before complete stop, it will be good.