How Long Should Car Run After Jump Start. In order to properly jump-start a car you will need to create a circuit that carries the current from the live battery over to the dead one. Otherwise you might need another jump start.
If not its time for a new one. If it holds the charge you should have nothing to worry about. Thus if your car dies after a jump-start always consider checking both the alternator and the battery.
If it isnt charging the car could actually die while you are driving it.
The question really is what the voltage was just before the jump start. If it holds the charge you should have nothing to worry about. Car stalls or has difficulty starting. You may not need to replace the battery right away.
