Is it more than four years old? Give the battery at least 30 seconds to build power before you attempt to start the other car. Article Info This article was co-authored by Andrew Everett. Start the dead vehicle. So if you accidentally left your head lights on it will be easier to get at the battery.
Spending about 20 minutes driving around town is ideal.
How to Jump Start a Car Battery
Take a short drive to help recharge the battery. I was on my way to the airport and I was late and it was raining. Secure the other red clamp to the positive terminal on the donor battery. SA Stacy Adams Apr 14, Then, use an old rag or towel to pat the battery and clamps completely dry. Shut off the car, make sure the cables are attached properly, and then try revving the working car to increase the power supply.