Intelli-Cables from Allstart are the safest and most durable clamps on the market for your lithium Jump starter. Built in safety features allow even someone with no vehicle battery experience to perform jump starts with no worries or second guessing. For the pro looking to have clamps that hold up in situations where there is high amperage, short circuit, and repetitive use, we've got you covered there as well. To prevent over cranking and overheating, the clamps will auto shutdown in overuse situations. No Spark Safety. There is no spark when hooking up clamps to the vehicle, even if the clamps touch together. Clamps do not become active until they recognize a good connection with a vehicle battery.