One of my cars suffers from the no power no trunk release malady. But I can pull the divider out from between the passenger compartment and the trunk. But it is also the car that I won't jump start because of all of the electronic gadgetry on it, I'm way to chicken. So I don't even carry cables with it. Just hope that if it has a dead battery that my cell phone is getting a signal.

But as a warning some new cars advise against jump staring because you can damage expensive parts of the electronic gadgetry. Some cars also have unique jump starting instructions that need to be followed to keep from damaging the electronics. So read the owners manual before you jump start your car.