GOOLOO GP4000

The GOOLOO GP4000 is a high-capacity lithium-ion jump starter designed for those who need reliable power for heavy-duty vehicles. In our testing, the 4000A peak current proved more than capable of cranking large displacement engines that smaller units struggle with, making it a standout choice for owners of large trucks or diesel-powered machinery. Its rugged build quality and straightforward interface make it an excellent addition to any emergency roadside kit, providing peace of mind for long-distance drivers or those living in cold climates where battery failure is common. Beyond its primary function as a jump starter, the unit features a high-speed USB output, allowing it to serve as a portable power bank for smartphones and tablets in a pinch. While it packs significant power, we found that the physical size of the jump box is notably larger and heavier than entry-level consumer models, which might be a drawback for those with limited glovebox or trunk space. However, for users prioritizing raw cranking power over portability, the GOOLOO GP4000 offers a professional-grade solution that bridges the gap between casual automotive tools and heavy-duty shop equipment. It is effectively engineered for reliability, ensuring that even the most stubborn engines turn over quickly during a dead battery emergency.