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The NOCO GB40 is a 1,000-amp lithium-ion jump starter pack for cars, boats, RVs and trucks with gas engines up to 6 liters or diesel engines up to 3 liters. It claims up to 20 jump starts per charge and adds spark-proof clamps, reverse polarity protection, a 100-lumen LED light with 7 modes and USB charging for phones and tablets. It suits drivers who want a compact booster they can keep in the trunk and use without help. Against bigger boosters it trades cranking power for size and simplicity; against cheaper no-name packs it offers proven safety circuitry and a known brand, though owners report the internal battery can fail over time.
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Owners generally rate the GB40 highly for starting cars quickly and for clamps that are hard to connect wrong. The most common complaints are a battery that stops holding charge after a few years and the need to top it up regularly.
The NOCO GB40 is a portable lithium-ion jump starter rated at 1,000 amps. It jump starts a dead battery in seconds and delivers up to 20 jump starts on a single charge. It is designed for cars, trucks, boats, RVs, lawn mowers and more, with gas engines up to 6 liters and diesel engines up to 3 liters.
Patented UltraSafe technology provides spark-proof connections and reverse polarity protection, so it can connect safely to any battery. The design guards against connection mistakes.
It also works as a portable power source. It can recharge USB devices such as smartphones, tablets and e-watches, and a full charge gives up to 4 smartphone recharges. A built-in LED flashlight puts out 100 lumens and has 7 light modes, including SOS and emergency strobe.
