Noco GB40 Boost
(140 reviews)
1000 amps in your glovebox to restart a dead battery: the UltraSafe NOCO GB40 forgives wiring mistakes and doubles as a power bank and a flashlight.
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Characteristics
- Power: 1000A (gas 6L, diesel 3L)
- Safety: UltraSafe, spark-proof
- Functions: USB power bank, 100 lm LED light
- Protection: IP65, compact
- 1000A, UltraSafe, power bank + light
Detailed overview: NOCO Boost GB40 1000A jump starter
The NOCO Boost GB40 is a 1000 amp portable lithium jump starter, designed to restart a vehicle with a dead battery without needing a second car or a set of traditional jumper cables. It is built for any driver, rider, or DIYer who wants a self-contained, reliable, and safe way to get back on the road, kept in the glovebox or the garage.
With 1000 amps, it restarts a gas engine up to 6.0 liters or a diesel up to 3.0 liters, even from a completely dead battery, and delivers around twenty jump starts per charge. Its biggest strength is safety: UltraSafe technology protects against sparks on connection and against reverse polarity. In practice, you can clamp on without worry, even with no experience, where standard cables hooked up wrong can cause real damage.
Compact and rugged with an IP65 rating (resistant to dust and water spray), it slips easily into a bag or a glovebox. Beyond jump starting, it plays two genuinely handy bonus roles: as a power bank, it charges a phone or tablet over USB when you need it, and as a flashlight, it puts out 100 lumens with several modes, including an SOS setting and a strobe useful during a roadside breakdown.
Keep in mind that 1000 amps suits commuter cars, compact sedans, and small engines best. For a big diesel truck or a full-size van, look at a more powerful model such as the NOCO GBX75. Also remember to keep it charged so it is ready the day you actually need it.
Reliable, safe, and versatile, the NOCO Boost GB40 is a safe bet for emergency jump starting, and a smart buy so you are never stranded again.
EAN: 0046221150025
User manual / Instructions for use (PDF)
Our tester's review: Gilles Caron
The GB40 is one of those small gadgets that save your whole day. Dead battery on a cold morning, you grab it from the glovebox, clip on the clamps, and the car starts on the first try, no need to track down another driver for a jump. What we like most is the peace of mind: UltraSafe spark-proof and reverse-polarity protection means you can connect it without stress, even if you are not exactly a shade-tree mechanic. Its compact size makes it easy to stash anywhere, and the bonus features are genuinely useful: it can charge a phone in a pinch over USB, and the 100 lumen LED with SOS mode helps out on the shoulder of the highway at night. Two honest caveats: 1000 amps is plenty for a commuter car or a compact sedan, but a bit tight for a big diesel pickup (look at the GBX75 for that), and you need to keep it charged so it is ready when you need it. For the vast majority of drivers, it is a smart, reassuring buy.
In-depth review NOCO GB40: our full review 4.2/5 Read our full review → Current actually delivered 4.7 Cold-weather performance 3.6 Capacity and versatility 4.0 Safety and protections 4.5 Build and endurance 4.1Frequently asked questions: NOCO Boost GB40 1000A jump starter
With 1000 amps, it restarts a gas engine up to 6.0L or a diesel up to 3.0L, even from a completely dead battery. It is ideal for commuter cars, compact sedans, and small engines. For a big diesel truck or a full-size van, choose a more powerful model such as the GBX75.
Yes, that is one of its strongest points: UltraSafe technology protects against sparks and reverse polarity. You can clamp on without stress, even if you are not a mechanic, where standard cables hooked up wrong can cause damage.
Yes, it also works as a USB power bank to charge a phone in a pinch, and as a 100 lumen LED flashlight with several modes, including SOS. It is a versatile rescue tool to keep in the car.
It delivers around twenty jump starts on a full charge, depending on the vehicle and the temperature. Keep it charged regularly so it is ready when you need it, especially in winter.
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Published on 02/09/2026