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The GOOLOO GP4000 is a high-capacity lithium jump box designed to start vehicles with engines up to 10.0L diesel or any gasoline size. It features a dedicated boost button for extremely low-voltage batteries and doubles as a portable power bank with fast-charging USB ports. This unit is built for heavy-duty use across trucks, RVs, and marine vessels, competing directly with high-output models from NOCO.
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Owners frequently praise the GP4000 for its ability to start large V8 and diesel engines that smaller packs fail to turn over. The build quality is noted as professional-grade, though its weight is a common point of discussion.
The GOOLOO GP4000 is a portable 12V lithium jump starter with a 4000A peak output. It starts all gasoline engines and diesel engines up to 10.0L. Pressing the "BOOST" button restarts a vehicle even when the battery voltage is extremely low. It works with cars, motorcycles, pickup trucks, RVs, tractors, trucks, cargo vans, ATVs, snowmobiles and yachts.
It also works as a power bank. It has two USB output ports, one of them supporting fast charging, and a USB Type-C port (5V/3A). These charge devices such as smartphones, tablets, cameras and GPS systems, and the Type-C port can also recharge the jump starter. On a full charge it can jump-start most vehicles over 60 times.
The case is hardened plastic with rubber corners to withstand drops. The smart jumper cables have all-metal clamps, and the unit has 10 built-in protections against misuse and sparks. A built-in flashlight helps in night-time emergencies. A smart chip supports starting in temperatures from -4°F (-20°C) to 140°F (60°C). If the unit sits idle for a long time, charge it every 2 to 3 months.
