The NOCO Boost GB40 is a compact yet powerful 1000-amp lithium jump starter designed to safely jump start a dead car battery in seconds—perfect for cars, trucks, motorcycles, ATVs, boats, SUVs, vans, and more. This portable car battery jump starter delivers up to 20 jump starts on a single charge and is rated for gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters. Engineered with UltraSafe Technology, it features spark-proof connections and reverse polarity protection, making it a safe and mistake-proof car battery booster for any 12-volt vehicle. It doubles as a portable USB-C power bank for charging smartphones, tablets, and other devices when it matters most, and includes an integrated 100-lumen LED flashlight with seven light modes, including SOS and emergency strobe—ideal for night use, roadside visibility, or emergencies. With an ultra-compact, rugged design, IP65-rated enclosure, and rubberized over-molded casing, this battery jump starter pack is built tough to withstand water, dust, drops, and rough handling. The GB40 includes heavy-duty jumper cables, a USB-C charging cable, and a microfiber storage bag, all backed by a 1-year warranty and proudly designed in the USA. Whether you’re looking for a car jump starter, battery jump box, jumper pack, power pack jump starter, or a reliable jump starter battery pack to keep in your glovebox, the GB40 delivers unmatched performance, trusted durability, and peace of mind—on the road, off the grid, or wherever your next adventure takes you.
From the brand
More Than Just a Jump Starter
The GB40 doubles as a portable power bank, letting you charge phones, tablets, and other devices via USB. It also includes a built-in LED flashlight with multiple modes — great for emergencies, camping, or working under the hood after dark. Weighing under 3 pounds, it’s light enough to toss in your glove box and forget about — until you actually need it.
Performance You Can Rely On
Engineered for reliability, the NOCO GB40 delivers consistent power even in extreme cold or heat. It’s perfect for cars, trucks, SUVs, motorcycles, ATVs, and small boats. Just connect, boost, and go — no second car, no roadside call, and no waiting in the rain pretending you know what’s wrong.
Why It’s a Must-Have
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1,000A peak current — starts up to 6.0L gas / 3.0L diesel engines
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UltraSafe tech with spark-proof and reverse polarity protection
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Doubles as a power bank for USB devices
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Built-in LED flashlight with multiple modes
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Compact and portable — about the size of a small tablet
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Rechargeable lithium-ion battery that holds charge for months
Perfect For
Daily commuters, weekend road trippers, or anyone who’s ever said, “I’ll just leave the lights on for a few minutes.” The NOCO Boost GB40 ensures you’re never stranded, whether it’s in your driveway or miles from civilization.
From the manufacturer
adrian givens –
The NOCO Boost GB40 is a highly recommended addition to any vehicle’s emergency kit. It is a reliable, high-quality, and user-friendly device that performs its primary function—safely jump-starting a vehicle—with exceptional competence. The added utility of the power bank and flashlight makes it an outstanding investment that provides genuine peace of mind. While larger engines may require a step-up model, for the vast majority of drivers, the GB40 is the perfect blend of power, portability, and advanced safety.
jose ricardo quezada fernandez –
I’m extremely satisfied with the NOCO Boost Sport. It’s compact, strong, and easy to use. I use it both personally and for my auto parts business, where I often buy salvage vehicles that need to be started. This jump starter has been tested and works perfectly — I’ve started up to 4 vehicles with dead batteries using the boost mode and around 6 vehicles with low charge without any issues.It’s very practical, charges fast, and feels durable. I would definitely buy it again. Highly recommended for anyone who needs a reliable jump starter for daily or professional use!
ReAnna P –
This is by far the best thing you can get for yourself or for those who travel alone. It takes about 2 hours to charge the pack. It functions very well for its size and weight. It’s small enough to fit under a seat for easy access. This has come in handy when Jump starting a dead battery. I was able to jump a dead battery 4 different times after I fully charged the pack itself.
eddie boone –
This is definitely a must have it you own a vehicle. Holds a great charge and does what it supposed to do. Depending on usage, I would suggest charging it after every 2nd use.
David Lee –
so far so good, it works and is simple to use.but the on-off button or the light button is easily turned on when you throw it in the bag it came with.other than that, i really wish it had more USB connections than the one USB-A connection.which is weird because the charge port is USB-C
W. O. –
The NOCO Boost Plus GB40 is one of the best purchases I have ever made. Now, three more members of my family have one. I purchased one for my motorcycle since sometimes I don’t ride for a while due to travel or weather. This gives me peace of mind knowing I can start the motorcycle no matter what. I once had to use it when commuting from work because I didn’t notice I had left the flashlights on all day. Eventually, I ended up getting a GENIUS5, also from NOCO, to keep my battery charged. Since then, I haven’t used the GB40, but I still keep it in my pannier, charged just in case.I was so happy with the GB40 that I recommended it to a family member. They got it and, fortunately, didn’t need to use it. Then, on a recent trip to visit them, one of their cars had been parked for a couple of days with some lights turned on. The battery was completely dead, showing less than a Volt on a multimeter. Of course, the NOCO starter didn’t recognize the battery as it was too low. We used the boost mode and were able to start the car with no issues. My family was so happy with the result that they bought two more to have one in each car.What I like:It has safety checks to prevent sparks, shorts, and reverse polarity (this also detects the voltage on the battery, which means if the battery has very low charge, it will fail to start in the normal mode).The boost mode disables all safety checks and works similarly to using cables from one car to another. This is a bit risky and you don’t want to use it often, but when you need it, it’s a relief to have.The cables are short and seem of good quality. The crocodile clamps have a firm grip without damaging battery connectors.It’s not bulky; I keep mine in one of the motorcycle panniers and it doesn’t take up much space. I probably should have bought the GB20, which also has the boost mode but is cheaper, and for a motorcycle would be more than enough. However, I vaguely remember it was not available when I got mine. I don’t regret it, though, as the GB40 can start a motorcycle (even a car) several times before needing to be charged again.You can use it as a lamp or emergency light, and also as a power bank for your phone or any other small device.What I don’t like:Storing it in the provided bag works but feels a bit messy. Other models, such as the GB70, can accommodate the clamps on the starter, which seems much cleaner. There is a case you can buy, but that will consume space, which, in my case using a motorcycle, is not much of an option.The boost mode is not really a boost, just a safety-disabled mode. I don’t like when companies use misleading names just to have a selling point.About the specs:I have no way to verify the claimed specs in the description, such as the 1000 Amps of discharge, but from a user’s perspective, it works with cars and motorcycles with no issues, even with flat dead batteries.In conclusion, I think this is a must-have. Hopefully, you don’t need to use it, but like insurance, you’ll be really happy to have it if you ever find yourself in a situation where you need it.
Beelo –
Best jump starter ive used. I manage a fleet of 53 trucks and have gone through many jump packs, both expensive and cheap, large and small. I bought one of these over 2 years ago for the fleet, and its still rockin like new. It holds its charge and is able to do multiple jumps on a charge. The best part is how small it is, I have had alternators die or belts fall off, and was able to hook this jumper up to the battery, close the hood, and drive back to the shop. That itself earns 5 stars, saved me a few tow truck bills. Since its small I have no problem handing it to someone and they can keep it in the truck just in case. Finally decided to buy one for myself after testing it out on the fleet for so long. If its on sale less than $100, definitely buy it!
Old Enough –
Gayet başarılı bir ürün
Kullanmadan yazmak istemedim, gerçi sadece 1 kere kullandım ama o kullanım da nitelikli sayılır.6 aydır çalıştırılmayan 35 yıllık bir arabada, kontağı çevirdiğimde kadranda hiçbir ışığın yanmadığı bir haldeyken cihazı bağladım. Kullanım videosundaki gibi “manuel override” modunu kullandım. 5. ya da 6. denemede motor tık diye çalıştı. Sıcağa ve soğuğa dayanıklı olması nedeniyle bagajdan eksik etmeden kullanılabilecek bir ürün gibi görünüyor. Tek kötü yanı pahalı olması ama ben ilk taksiti bu denemede çıkardım, çekici parasından kurtardım.
Ireland 🇮🇪. –
Worth every penny
Brilliant and works perfectly
Chris –
Top Gerät aber die Anleitung lesen!
Ich nutze den NOCO Boost GB40 schon mehrfach bei verschiedenen Autos (Benzin und Diesel) und er funktioniert einwandfrei, wenn man weiß, wie man ihn richtig benutzt.Viele schlechte Bewertungen kommen eindeutig daher, dass Leute die Bedienungsanleitung ignorieren und dann sagen, das Gerät „funktioniere nicht“. Das ist schlicht falsch.Damit es klappt, hier eine kurze, einfache Anleitung, die jeder verstehen sollte:🔋 Kurz-Anleitung für den GB401. Rote Klemme an Pluspol (+) der Batterie.2. Schwarze Klemme an Minuspol (–) oder an einen Massepunkt (Metall am Motorblock).3. Power-Taste (🔘) drücken → weiße LED leuchtet = Gerät bereit.4. Wenn nichts reagiert oder die LED blinkt rot, dann:➜ Boost-Taste (⚠️) 3 Sekunden gedrückt halten, bis die weiße Boost-LED dauerhaft leuchtet.5. Motor starten.6. Nach dem Start: Gerät ausschalten, Klemmen in umgekehrter Reihenfolge entfernen.Ich habe mit dem GB40 schon völlig leere Batterien/Fahrzeug gestartet, sogar nach längerer Standzeit.Das Gerät ist robust, sicher, und sehr kompakt ideal für unterwegs.Nur bitte: Nicht einfach blind anklemmen und erwarten, dass es „magisch“ funktioniert.Wenn man die paar Schritte beachtet, ist der NOCO Boost GB40 wirklich ein Lebensretter bei leerer Batterie!