Jump leads are also known as booster cables or jumper cables. They are a tool used to jump-start a vehicle with a dead or weak battery by connecting the battery to a functioning source of power, such as another vehicle. Other synonyms for jump leads include booster leads, start cables, power leads, and battery cables. Whatever the term used, jump leads are essential for any driver to have in the event of an emergency. It is important to check the condition of your cables regularly, as damaged or worn-out jump leads can be dangerous and fail to provide the necessary power needed to start a vehicle.