What would be the liability implications if one person was charging their car from another car and for whatever reason broke their car (faulty/damaged charging

What would be the liability implications if one person was charging their car from another car and for whatever reason broke their car (faulty/damaged charging port? Bad wiring? Something else?) I’m guessing insurance would need to cover it. Would they want to cover it, or just make it another exclusion? Today, using a Jerry can would be similar for emergency fuel but very unusual/rare. Plus a lot less risk of damage (still some risk of wrong fuel or sediments in the can). I can definitely see the usefulness in smart homes with onsite batteries, but not quite convinced about the car aspect. Especially if it means having to replace your battery sooner due to more wear and tear.