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The GOOLOO GP4000 is a portable 12V lithium jump starter rated at 4000A peak, which Gooloo says starts all gasoline engines and diesel engines up to 10.0L. It doubles as a power bank with dual USB ports, one fast-charging, plus a USB-C port that both charges the unit and powers other devices. Its 24,000mAh battery is claimed to deliver over 60 jumps per charge. All-metal clamps and ten built-in protections make it a safer pick than basic budget starters, and its hardened plastic shell with rubber corners is built to survive being kept in a trunk. It suits drivers of large trucks, RVs and diesel vehicles who want one unit that also tops up phones and tablets.
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Owners generally rate the GP4000 highly for starting big engines on the first try and for its power-bank usefulness. Some find it heavier and bulkier than expected, and a few report the charge draining if it sits unused for months.
The GOOLOO GP4000 is a portable 12V car battery jump starter with a 4000A peak current and a 24000mAh capacity. It starts gasoline engines and diesel engines up to 10.0L. That covers cars, motorcycles, RVs, tractors, trucks, cargo vans, ATVs, snowmobiles and yachts. A full charge can start most vehicles over 60 times.
The jumper cable has all-metal clamps. The unit has 10 protections, including overcurrent, overload, overvoltage and overcharge protection. The case is hardened plastic with rubber corners to withstand drops. A built-in flashlight helps in night-time emergencies.
It also works as a power bank. Dual USB ports, one of which supports fast charging, charge devices such as smartphones, tablets, cameras, GPS units, camcorders and Bluetooth headphones. A USB Type-C port supports 5V/3A input and output, so it can charge other devices or be recharged itself.
