HOW DO I JUMP-START MY CAR?
First, you'll need jumper cables. Ask a friend to drive his or her car next to yours, leaving the engine running.
Cables are color coded: make sure to attach the red cable to the positive battery terminal on both cars, and the black cable to the negative side. The positive side will either be color coded red +/or have a "+" on it. Red is for fire, so think "positive."
You'll know right away if you've crossed cables because this will cause a spark. If that happens, don't worry: check your cables again, and attach them firmly and correctly.
Once the cables are attached, and with your friend's car is still running, try to start your car. If it turns over, remove the cables, accelerate in neutral, and then drive around to charge your battery.
If your battery still won't maintain a charge and your car won't start after you've given it time to charge, it may be time to buy a new battery.