Powerful and Reliable Car Battery Jump Starter - The 4000 amp booster pack jump starter is capable of quickly jump-starting a dead car battery. Even if the battery voltage is extremely low, simply pressing the "BOOST" button will forcefully restart the car. The GOOLOO car battery charger jump starter can effectively start all gasoline engines and diesel engines up to 10.0L within mere seconds. This versatile device is compatible with 12v vehicles, motorcycles, pickup trucks, RVs, tractors, trucks, cargo vans, ATVs, snowmobiles, yachts, and various other vehicles.

Colossal Capacity Portable Charger - The GP4000 car battery charger jump starter boasts an immense capacity and offers dual USB charging output ports (one supporting fast charging) along with a USB Type-C charging port (5V/3A). This versatile power source enables you to charge other devices or recharge the jump starter itself. Its compact design ensures high portability, making it capable of efficiently charging various portable devices such as smartphones, tablets, cameras, GPS systems, and more.

Emergency Life Saver - The GOOLOO GP4000 car jump starter provides quick vehicle jump-starting capabilities, ensuring that you're not stranded and exposed to potential dangers for an extended period of time. With a full charge, it can jump-start most vehicles over 60 times, offering reliable assistance in emergency situations.

Safety & Quality Metal Clamps - The GOOLOO booster pack jump starter is equipped with 10 different types of built-in protection, alleviating concerns about misuse and sparks. Our primary objective was to ensure that users feel completely safe while using our product. The Smart Jumper Cables are designed with durable all-metal clamps to prevent damage that may occur from long-term usage.

Rugged 12V Car Jump Starter - The sturdy construction of hardened plastic and rubber corners ensures that the jump starter can withstand drops without any issues. Additionally, it features a built-in flashlight to provide assistance during vehicle emergencies at night.

Reliable in Extreme Cold Weather - The advanced smart chip used in the GP4000 jump pack ensures fast and dependable car startup even in extreme temperatures ranging from -4°F (-20°C) to 140°F (60°C).

【TIPS】 If the jump starter has been idle for an extended period, it is advisable to charge it every 2-3 months to maintain its optimal condition.