If you've removed the vent caps of a battery, make sure that you replace them tightly.

Every time a battery is discharged so much that it needs to be jumped, it weakens the battery. Consider buying a new one after a few jump starts, especially if you're in a cold climate.

2torial #0508: Learn2 Jump-Start a Car (Continued) Start the car Stand back from the hood areas of the cars. Do not smoke while you're doing this. Safety goggles are a good idea. Start the car that's providing the jump start. Wait a moment, then try to start the car with the dead battery. If it does not start, stop trying and wait a few moments longer. Try again for no more than thirty seconds. If the car has not started by now, chances are that it's not going to. If this is the worst thing that happens to you in life, consider yourself a very lucky person. Step 4