A 24V Car Jump Starter is a powerful, portable battery pack designed to deliver a strong jolt of electricity to start vehicles and heavy machinery with 24-volt systems, like large trucks, RVs, tractors, and boats, when their own batteries are dead. These devices provide high cranking amps (like 10,000A) and often feature dual 12V/24V modes for versatility, safety protections (short circuit, reverse polarity), USB ports for device charging, and LED lights, making them essential for emergencies and heavy-duty use, unlike standard 12V jump starters for cars.