If the battery in someone else's car goes dead, then you can get them started again. You just need a power source and jumper cables. Prepare the vehicles before you attempt to jump start the vehicle. Both of the vehicles have to be in either neutral or park. The ignitions also have to be turned off. Open both of the car hoods and attach the jumper cables.
Your vehicle has to be started first. You should run your vehicle for a few minutes. After that, you should ask the other person to start their vehicle.