Product Features and Description
When your car battery fails, the NOCO Boost Plus GB40 1000A UltraSafe Car Battery Jump Starter is your go-to solution. Designed not only to revive dead batteries in vehicles up to 6.0L gasoline and 3.0L diesel engines, this NOCO jump starter serves as a versatile power booster and portable charger. Its effectiveness isn’t just limited to automotive emergencies. This compact yet powerful device can also charge gadgets, making it essential for camping trips or other off-grid adventures where power sources are scarce.
Stay tuned as we dive deep into the features of the NOCO Boost Plus GB40, gather user opinions, explore expert reviews, showcase videos, compare it against competitors, and highlight the most attractive market offers available for this essential car battery booster.

- Powerful and Versatile NOCO Jump Starter: Quickly and efficiently start dead batteries with this powerful 1000-amp lithium battery jump starter. Capable of up to 20 jump starts on a single charge, it’s designed for gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters.
- UltraSafe Technology: Enjoy a safe and easy-to-use car jump starter experience. The NOCO jump starter features a mistake-proof design with spark-proof technology and reverse polarity protection, ensuring no worries about incorrect connections or sparks when connecting to any 12-volt vehicle.
- Multi-Functional Tool: This device isn’t just a car jump starter but also acts as a portable power bank and an LED flashlight. You can recharge smartphones, tablets, and other USB devices. It charges quickly from any powered USB port in about 3 hours at 2.1 amps. Additionally, it includes a 100-lumen LED flashlight with seven light modes, such as emergency strobe and SOS, for added safety and utility.
- Advanced and Durable Design: The NOCO jump starter boasts a state-of-the-art design with high-discharge lithium technology that ensures safe operation in any climate. Its rugged, water-resistant enclosure is IP65 rated, and the rubberized over-molded casing helps prevent scratches or marring of surfaces. The device is ultra-compact and lightweight, weighing just 2.4 pounds.
- Comprehensive Package: The package includes the GB40 UltraSafe Portable Car Jump Starter, heavy-duty booster clamps, a 12-volt car charger, a micro USB charging cable, a microfiber storage bag, and a user guide. It comes with a 1-year warranty and is designed in the USA, ensuring reliability and quality.

The NOCO GENIUS BOOST GB40 is a highly portable and compact lithium-ion jump starter, designed specifically for 12-volt batteries. This NOCO jump starter can safely rejuvenate a dead battery in mere seconds, offering up to 20 jump starts on a single charge. With spark-proof technology and reverse polarity protection, it ensures a mistake-proof operation, making it highly user-friendly and safe for anyone to use.
Additionally, the GB40 features an integrated high-output 100-lumen LED flashlight with seven different light modes, including low, medium, high, flashing, strobe, and emergency SOS. This versatile device can hold its charge for up to one year without needing a recharge. An internal battery pack allows it to serve as a power bank, capable of recharging personal mobile devices such as smartphones, tablets, and other USB devices. It can also be recharged through any powered USB port.
Rated at 1,000 amps, this powerful car battery booster is suitable for gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters, covering a wide range of vehicles including cars, motorcycles, ATVs, boats, trucks, SUVs, RVs, and even lawnmowers. The combination of its compact design and high functionality makes the NOCO GENIUS BOOST GB40 an essential tool for any vehicle owner.

Key Features and Performance of the NOCO Boost Plus GB40 Jump Starter
| Feature | Description |
|---|---|
| Amperage Excellent | The NOCO jump starter provides 1000 Amps peak current, which is crucial for jump-starting a dead battery in seconds. This amperage is suitable for up to 6.0L gasoline and 3.0L diesel engines, making it highly versatile and effective for emergency situations. |
| Battery Type Good | Equipped with Lithium Metal batteries, the NOCO jump starter ensures high efficiency and long battery life. Lithium batteries are known for their high energy density and lighter weight compared to traditional lead-acid batteries. |
| Special Features Excellent | The GB40 model includes a 100-lumen LED flashlight, a portable power bank for USB devices, and offers reverse polarity and spark-proof protection. These features not only enhance the utility of the jump starter but also ensure safety during use. |
| Peak Output Current Excellent | The peak output current of 1000 Amps is crucial for providing the necessary power to jump-start the vehicle’s battery. This high peak current can jump-start most cars multiple times on a single charge. |
Get ready for any roadside emergency with top-rated jump starters. Leading the pack is the NOCO Boost Plus GB40, perfect for 6.0L gasoline and 3.0L diesel engines. Discover more options in our comprehensive roundup here.

What Are the Upsides and Downsides of the Car Battery Booster
Highly Reliable and Effective – The NOCO Boost Plus GB40 has proven to be a dependable tool for many users. According to Amazon Customer, it “actually SAVED MY DAY” by providing simple, easy-to-follow instructions. Robert L. shared a similar experience, stating that his completely dead battery started right up after using this jump starter.
Easy to Use and Portable – This product stands out for its user-friendly design and portability. MissSlick praised its lightweight and versatile nature, highlighting that it “comes with its own carry bag which helps keep it clean stored in the trunk of my car.” The ease of operation was echoed by Linda T, who noted that the product “seems simple” to use.
Long-lasting and Convenient – Many users appreciate the NOCO Boost Plus GB40 for its long-lasting charge and convenience. JM remarked that it is “just as essential in the trunk as a jack and spare tire,” and Friendly ghost confirmed that it “had a full charge” even after sitting in their car for six months, showcasing its reliability over time.
Inconsistent Performance – Some users have reported issues with the product’s performance. Geoff Davis mentioned that the jump starter did not work on either his 6-cylinder jeep or 4-cylinder car, suggesting that it might “work on a motorcycle.” Similarly, Valerie was disappointed when it couldn’t start her V6 Accord despite being fully charged.
Charging Issues – There have been complaints regarding the device’s ability to hold a charge over time. Dave K. experienced difficulties with the jump starter, stating that it barely started his car and “gave me too much of a sense of being prepared and only let me down.” This inconsistency can be a significant drawback for users relying on the product in emergencies.
The stars speak of…
Opinions about this product were divided in such a proportion among the buyers.
I have ordered this exact same Nocco before, but it came with a semi hard carrying case before. I expected it to come with the case again and it did not. I have not yet attempted to use this so I will update my review when I do.
Didn’t really work well Took way too long
Insights & Inquiries: Getting to the Heart of Your Questions
How many times can this jump starter jump-start a vehicle on a single charge?This portable jump starter can safely jump-start a dead battery up to 20 times on a single charge, making it highly reliable for multiple uses before needing to be recharged.
What types of vehicles can this jump starter be used on?This versatile jump starter is suitable for a wide range of vehicles, including cars, motorcycles, ATVs, boats, trucks, RVs, SUVs, and even lawnmowers. It supports gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters.
Is it safe to use for someone with no experience?Absolutely. This jump starter features spark-proof technology and reverse polarity protection, making it mistake-proof and safe for anyone to use, even those with no prior experience.
How long can the jump starter hold its charge?The internal battery of this jump starter can hold its charge for up to one year without needing to be recharged, providing peace of mind for those who may not use it frequently.
Can this device charge other electronic devices?Yes, it can. The internal battery pack can recharge any personal mobile device, such as smartphones, tablets, or other USB devices, making it a handy portable charger as well.
What are the special features of the built-in flashlight?The integrated high-output LED flashlight has seven light modes: low, medium, high, flashing, strobe, and emergency SOS. This makes it versatile for various situations, from basic illumination to emergency signaling.
What is the weight and size of this jump starter?This jump starter is lightweight and compact, weighing just 7.9 ounces with dimensions of 4.61 inches in depth, 8.19 inches in width, and 4.21 inches in height. This makes it easy to store and carry around.














John D –
Never worked on any of my cars, not super powerful
I have owned this thing over 2 years, and it has never once actually started any of my cars. I have gotten a couple revolutions, but that’s about it. I have given this thing plenty of chances. Read and reread the instructions to make sure I am not missing anything. Made sure it was fully charged. Tried multiple times on multiple vehicles, thankfully I also keep a pair of jumper cables. To be fair it is typically in the cold, but definitely wouldn’t rely on it. The only car this thing ever started was a strangers honda civic. When using it, the battery depletes pretty quickly. Waited the 30 seconds for it to charge the vehicle battery as per the instructions, and giving it anything more than 2 cranks seems unfeasible, it is usually pretty dead by that point. For spending over $100 on it, not super pleased. At least it makes a decent battery bank for my phone….
Russell A Decker –
Was as described
Was as described
Skippy Mcgee –
ive been using for years and its still kicking
ive been using for years and its still kicking..in fact this last cold snap (dec of 2024) my sons battery was dead and wouldnt turn car over. used this to get it running. amazing power from a little pack. good thing i forgot to make a review back then! this is years of service im talking about. if it ever dies im buying another!
Mike W –
USB C charger needed
Awesome little thing, car was stone dead from sitting, hooked it up and car started, just that easy!
Tom –
This has gotten me out of a bind on multiple occassions!
I drive a mid 2000’s sedan in a region with a very cold climate for much of the year. I also work from home, so I frequently go multiple days without driving my car. This has bitten me in the behind on more than one occasion, as on some of the colder days after leaving it for a while, I’ve found my car unable to start without a jump. There has never been an instance so far where I have been unable to start my car with the NOCO! I liked it so much that I bought my mom one for Christmas the year after I got mine, and I’m buying my brother one this Christmas!
Rdenton –
Good quality
Love this product
Kindle Customer –
This works swimmingly
Has multiple uses as a jump start and doubles as a backup charger for my phone.
James Obrien –
Grab one for every car. Better to have and not need, than to need and not have.
Holds a charge, got it on sale, and small package. Easy to stow in the back of my jeep.
Kamla –
Disappointed : no cigarette lighter adaptor
I was little disappointed that this did not come with a cigarette lighter charger as advertised in the product description. I go on long trips in morthern Canada. Now I need to purchase another adaptor to be able to charge this thing on the go. 😞
Roderick Dunkley –
👍🏿👍🏿
So far so good, it is currently doing what they said it would do
Ryan Howard –
Very Helpful
I ended up buying this after my car would not start. It has saved me twice now and I have also been able to assist others. I would highly recommend this product and it also turns into a charger and a flashlight so you can’t go wrong with the options.
Amazon Customer –
A must have
Save your time, energy, and space with this jump starter. There are so many on the market, yet my Road Assistant guy that came out to me had this in his truck and recommended it to me as his only go to. Reliable, powerful, and does the job.
CW –
Worked as advertised
I purchased and charged this up approximately a month ago. Last night I had the opportunity to use it to help a neighbor jump start her car. It worked as advertised and she’s since ordered one for herself.
Rob –
Quality
Wonderful to have an emergency booster that is always on the ready
Kelley Stratton –
Battery starter
My car was completely dead. I put the charger on and it started right away!! Love it!!
deanna autry –
Xmas gift
My husband speaks highly of this, I figured we get one for ourselves.
Nate –
NO English Instruction manual
No English instruction manual provided.
Dean_Reviews –
Failed when I needed it!
I have a 2020 Honda Ridgeline not a big truck medium size. So My battery dies fortunately in front of my garage and not out in the middle of nowhere. So I pull out the jumper out of my trunk using it for the first time and thinking all right this is why I paid $99 for this freaking thing. Hook it up tried to turn on the car nothing happened. Waited 30 seconds like it says in the instructions it couldn’t jump it. Try it again not exceed five times in 15 minutes nothing could not turn the engine on. What a piece of crap this product is! Fortunately a neighbor came by and I jumped my truck. Don’t ever trust this thing I was lucky I was right in front of my garage and not out in the middle of nowhere which I often do when I go fishing. Would not recommend this thing whatsoever what a piece of garbage!
A. Hudson –
IT WORKS!!!!
This is an amazing product. I left the dome light on in my car all night and all through the day. My car battery was completely dead. I couldn’t get the car to make a sound. No lights, NOTHING! I connected the Noko Boost Plus to my car battery and all of a sudden the panic button went off on my car, and the lights started flashing, and my car CAME TO LIFE. This tiny little Noko Boost Plus really packs a punch! Now my car is running and I didn’t have to get somebody else to connect their car with mine with jumper cables. I am so grateful!
Sherrie Staton –
Charger
Works great!
Alicia Corson –
Car Battery Jumper
Love this product! Price was reasonable. I was able to jump start my car after having trouble with basic car jumper cables. I have helped so many people start their cars. Easy to use, compact,and good quality. Would recommend to someone in need of a simple jumper. Would make a great gift!
Conrad P. –
Saved my behind
My car used to have a parasitic draw and would leave me stranded. This thing has time and time again saved me in a pinch. Just keep it charged, read the instructions, and let it do its thing. My battery was so dead, that it didn’t recognize that it was connected to the darn thing. Thanks to the override button, the car suddenly kicked to life and started right up without issue. PLEASE READ THE INSTRUCTIONS This is coming from an auto-technician who has used a plethora of portable car jump starters. It’s easy enough to figure out, but just read the darn instructions. Doing the walk of shame to dig them out of the trash to find out how to use the override was not fun.
Lisa Elwin –
USB-C charging cord. No adapter provided.
I was able to charge my vehicle with this devise right out the box. But my vehicle died again and the next time it drained the charger. When I went to charge the charger I see the USB-C cable is incompatible with anything in my house and no adapter was provided. So now I have to buy something else so I can plug it into a wall outlet to charge it. The charger cable in the product picture on here is not the cable I received.
SYILDIZ –
Nice tool to recharge battery
Nice tool to recharge battery
CKCBM –
NOCO Boost Plus gb40
Didn’t come with any charging cord. No way to charge it!!!
Antonio –
Awesome
The amazon delivery driver handled my item with care Thanks till next time.
J –
noco is a no-go
do not buy. unit failed within 3 years or so. warranty not long enough to cover failure.
Megan Grant –
Best purchase ever!
I drive a Toyota Yaris and a few months ago it would not turn on whatsoever. After getting it jumped I drove home and the next day went to AutoZone to see what is going on. Turns out my started and alternator were going out. I didn’t have the money to buy parts right away so I got this on discount. My car would not turn on 5+ times but this jumper saved the day each time. Finally I was able to fix both and my car is buyer than ever but having this was a life safer. I don’t have friends or family to call so knowing I was good was a peace of mind. If you’re thinking about getting this just do it! It comes with a bright flashlight with different modes and a usb charging side. Going to buy another one for our 2nd car.
orson chavez –
Cheap Chinese jumpers works better!
in 1 year of use 2 out of 3 times didn’t start my car, battery drains fast i have a 5 year old chinese Jump starter that works better than this crap and i don’t have to charge it every month like this because if you don’t chage it this would die and you won’t be able to charge it. i have other 2 that died and they where never used, I wanted to have one on each of my cars one still works and the other 2 that i never used won’t charge. Allso i have i noco genous that can’t even revibe my dead battery, My 20 year old battery charger beats this crap.
rowina –
Charger
I love this its so convenient jump starts quick and it a value for my money
Osaretin Ugiagbe –
Great!
Gets the job done
Brian –
Could not jump anything
It didn’t work at all get the bigger jump pack.
Richard –
Awesome
LOVE the size of it. I have used it about 5 times already and worked every time. I used it for bikes and for my SUV. No issues so far.
South Florida Gardner –
Worked Both Times!
Twice I left my ignition turned on in my car while in the driveway FOR HOURS!! Battery dead both times but this little gizmo worked both times!! I even had to use the BOOST ability both times because it was so low! Worked both times,recommend it. Keep it under my seat and check it occasionally to make sure its charged.
Kinny –
Will buy again
I got this because my vehicle and old battery suck. My old battery was constantly off gassing and corroding my terminals which would drain it completely. I had to clean the terminals 2x a year and was constantly dealing with a nearly dead battery. Initially I got the Noco trickle charger and had that connected to my battery 24/7. I was having to replace the terminals constantly from corrosion. Then after paying some guy in a tow truck to give me a jump I decided to go all out. I went and got a red top battery, the GB40, and the Noco GNC007 cable. The cable is permanently on the battery and allows me to just plug the GB40 in without using the alligator clamps to attach it. Not even two days after installing all that stuff I had a 100% dead battery because I left the interior lights on. I plugged in the GB40, pushed the ON button and started the vehicle. There was a split second hesitation and then it fired up. This was on a 4.7 liter V8. If it will start my old heap (2004 WJ) it will start anything smaller with ease. I had to use it on a 1.6 liter a couple months ago and no problem. I know there are many different types of jump packs but this is the one I went with and it works. It is now in a box in my vehicle and I’ll be buying a couple more for family.
GW –
Wow! Awesome.
I have NO idea what I’m doing with engines. I didn’t even know which model of these to buy. I went with GB-40. I bought this for two uses. First, my riding zero-turn mower’s battery died and I needed to jump start it or replace it. The battery is approximately $100. Second, I recently needed a jump start to my SUV. Fortunately, two very kind and awesome samaritans helped me get my vehicle up and running. We all know what a new car battery costs. I open up the package. I plug in the device to my USB-C computer’s hub. It already had a bit of a charge. I completed the charging, took like 2 hours. You know when it’s completely charged because the last green light is solid. Easy to tell when you need to charge it up. The USB-C cord could be a bit longer. I connect the cables to my mower’s battery. Press the Power button on the jumpstarter device. I go to turn on the mower and Wham! … the mower starts right up in about 2 seconds. I was like, NO WAY! That was sooo easy. The single use of this device has already paid for itself. I paid $99. Could probably be cheaper. Another suggestion would be to make the jumper cables about one (1) foot longer. The seat to my mower folds down, I can’t start the mower unless the seat is down. I.e., I needed to angle the cables awkwardly to connect them to the battery. Additional cable length would have made it easier to connect the battery to the jumper. Overall, 9.5 out of 10. One use of this device and it pays for itself. Yes, even if you have an emergency roadside, you are still waiting 1-2 hours, rather than simply lifting your hood, connecting the cables, pressing a single button, and turning the key to your vehicle. I can probably do all this is less than two (2) minutes. Two minutes vs. 2-hours waiting? You can understand the value of this. I’ll keep this in my vehicle. It’s small and not that heavy. It comes with a bag, but I’m probably never going to use it. I’d give back the bag to have a longer set of cables. Don’t think about it, just buy it.
gil –
says new but missing items
received it , opened it up and its missing 2 key items .
Thomas Winn –
Small but powerful
Used to jump my 4 wheeler in hunting woods , way off trail .
Mr. Dwyer –
Still unproven in the long haul
The booster is easy to use, and it started my car once when the battery ran down. Next time, not so well. I can’t say if the product was unable to overcome a zero-voltage battery, or the battery condition was so bad it would not allow any booster to work. I had to recharge the battery to start the car, and within a week the battery was replaced.
Amazon Customer –
Love it
Small and mighty.
Boo –
Product was obviously not new
The booster came in an unsealed box and had been either returned or refurbished. It was also missing the carry case. All the other items were there and the booster seemed to charge properly. It may be a fine product but sending me an opened product is a kick in the shorts. I ordered a couple others for family members. Hopefully they have better luck with this company.
Noneya Biz –
This thing sucks
Dies very fast, won’t jump start. Waste of money
4StarDad –
Great little jump starter
I woke up to a dead battery. I ordered this and Amazon delivered it before 2pm. It was mostly charged when I got it, but I charged it up to max before trying it out. The NOCO website has very helpful videos on how to use it and what the buttons do. This became very important. When I initially connected it to my car, the lights wouldn’t “Chase” as the video said they should. The car was still dead. Turns out it will only register/work automatically if the battery has at least 2 volts. If less than 2 volts, the lights don’t chase and you have to use the manual override button. I did that (press & hold for 3 sec), the lights started chasing and the car started right up. Huzzah! I’ll never leave home again without this thing. Highly recommended.
Bruce B. –
Missing parts
Would be a perfect item if it came with all the parts. Was missing a charging cord. So item is useless with a way to recharge it.
JO –
Preforms as designed.
Battery life, to be determined
Jose mendoza –
By far the best !!!!!
Worked perfect when jumper cables didn’t work ! Tried this and started right up! A must have. Worth every penny !
Serred –
DO NOT BUY – NOCO too cheap to send proper cable to charge their device
I had already bought one of these so thought I would get a second one. Come to find out that they are no longer shipping the proper cable – they are shipping a usb c / usb c cable and expect you to find some way to charge it – unless you have an adapter or an extra cube that is not is not Apple style, it may work – or you have to spend another $10 to get the adapter. What Cheapskates – would return but then I have to take my chances with another vendor and another problem. No more NOCOs for me.
dave dunn –
The cord to charge it is doesn’t have a usb or a plug
How tf am i supposed to charge this? It doesn’t come with a plug nor a usb so i cant put a plug adapter on it. 2 stars for that stupid decision. Now i have to borrow a macbook charger from one of my friends…
D.D. Vettel –
Needs better instructions
So called “users guide” doesn’t explain anything. You’ll need to go online to NOCO to find out how to use.
J P –
Does not work
I should have listened to the negative reviews on here. Fully charged, fresh from the charger. attempted to jump the battery – nothing except the safety alert message. Double checked the setup and everything was correct. Tried the manual override, nothing. Gave up, called the tow truck and my battery jumped immediately. Thanks for nothing except extra hassle!