Jump-starting batteries is a process used to revive a dead or drained car battery. This is typically done by connecting the dead battery to a charged battery using jumper cables. The charged battery, often from another vehicle, provides the necessary electrical power to start the engine of the car with the dead battery. To jump-start a battery safely, it’s important to follow specific steps. First, connect the red cable to the positive terminal of the dead battery and then to the charged battery. Next, connect the black cable to the negative terminal of the charged battery and attach the other end to a metal ground on the car with the dead battery. This helps prevent sparks and ensures a safe jump-start.