NOCO Boost Plus GB40
Consistently praised by owners for its reliability and performance, making it the top choice for emergency roadside assistance.
Consolidated from 38 cited sources across 36 outlets
Where the cited sources landed, as we read them
- 27 positive sources
- 3 mixed sources
- 7 unconvinced sources
1 of 7 research runs entered this as a product to avoid rather than a pick.
While popular, it is outclassed by newer models such as the GB50 and GBX155. Its 1000 A peak is adequate but not optimal for larger engines or frequent use.
Flagged 28 July 2026
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Pros & cons
- ✓ Widely endorsed by users for dependable power
- ✓ Compact size
- ✓ 1000 A peak output
- ✓ UltraSafe clamps
- ✓ Proven longevity
- ✗ Lower output compared to newer models
- ✗ Not ideal for large engines or frequent use
The sources behind this ranking
We searched the web and YouTube for what has been published about this product, then read the articles, video transcripts and comments we found.
Evidence 18 articles, 16 video reviews and 4 community sources
27 positive sources
If you have a small-to-midsize car, pickup, or SUV and want a high-quality but compact jump starter, the NOCO Boost Plus GB40 is our top choice. We appreciate its rugged build quality, excellent grippy clamps, and simple, functional design. The battery is a bit small, though, so you might need to check it more often than larger models to ensure it maintains a charge so it's ready for trouble.Read A
And we're pretty happy with that one. It looks looks really really well built. Okay, you can see you can see how powerful this one is even compared to the big heavy uh you know power packs. Okay, so that's what it looks like. It feels really really well built. It's a uh even like moisture moisture resistant, I think. So, it's pretty cool.Watch T
There are a zillion car battery jump starters on the market, but NOCO has remained one of our favorites because the brand hits a great sweet spot between high-performance and high-value. You get a lot of functionality and solid build quality for the money. And with Amazon Prime Day going right now, you can score a good discount on some of NOCO’s best-selling roadside rescue tools .Read A
And we're pretty happy with that one. It looks looks really really well built. Okay, you can see you can see how powerful this one is even compared to the big heavy uh you know power packs. Okay, so that's what it looks like. It feels really really well built. It's a uh even like moisture moisture resistant, I think. So, it's pretty cool.Watch L
After the first experience I purchased a NOCO Boost Plus GB40 1000A and keep it charged and in the car. When needed, I'd jump and then drive it for about an hour at highway speeds and it seemed to be ok, at least for a while. This past winter I took a trip to Wisconsin (I live in Minnesota) and stayed at a resort, parked outside, and the temperature dropped to about -9 over night.Read F
This is by far one of the most popular jump starters on the marketWatch G
The GB40 has built-in protection that tells you if the clips are on backwards, which takes the guesswork out of it if you’re not used to using a jump starter. It made short work of my 2015 Kia Ceed, which is a diesel. I had a vague memory of hearing that you couldn’t jump-start diesel engines with a portable jump starter, but that’s outdated thinking.Read P
They have saved us many times. You never know when your battery is going to go out and you're going to need to jump start your vehicle possibly many times before you get your new battery at least once. So, this is a case. I'll put links to the GB40 and the case in the video description. So, this is a case. It's very compact.Watch C
If the Gooloo isn’t on sale, or if you need to prioritize portability with as small a jump starter as possible while still retaining reliable performance, the Noco Boost Plus GB40 Jump Starter is your best bet. While its output might seem paltry compared to some of the other models I tested, this is the industry’s go-to for a reason.Read F
Uh now, this particular unit, the GB40, did come with a hard case. And, um it's pretty decent case, to be honest with you. You just got to remember to keep it charged up. Comes with a little charging cable. And, you know, that's about all I could say about the GB40. But, let's uh move on after I show you the case. There's where the the cables go. Zippers on both sides.Watch C
If the Gooloo isn’t on sale, or if you need to prioritize portability with as small a jump starter as possible while still retaining reliable performance, the Noco Boost Plus GB40 Jump Starter is your best bet. While its output might seem paltry compared to some of the other models I tested, this is the industry’s go-to for a reason.Read T
If you're looking for a compact jump starter that's easy to store, simple to use, and provides a little extra peace of mind every time you get behind the wheel, the NOCO Boost Plus GB40 is definitely worth considering.Watch A
After using approximately a dozen jump starters in the AutoGuide Garage, we think the NOCO Boost Plus GB40 is the best jump starter for most people. It's priced about the same as competing models, but is smaller and better constructed than any other jump starter of the size that we tested.Read T
What we like. This jump starter is incredibly compact and easy to store. It's spark-proof technology ensures safety during use, making it foolproof. If you have a smaller vehicle or prioritize portability and safety, this is an excellent choice for peace of mind on the road. What people say. This is a great little jump starter.Watch S
Data suggests this is overwhelmingly one of the best major jump starter brands on the market, earning it the top spot in SlashGear's rankings. Noco's jump starters are well reviewed, and are best sellers at nearly every retailer that carries it.Read T
The Nco Boost GB40 is perfect for anyone who wants a safe, compact, and reliable emergency jump starter without going too powerful or too expensive.Watch P
It features a patented safety technology that provides spark-proof connections and reverse polarity protection, making it safe and easy to use. The battery booster doubles as a portable power source for recharging smartphones, tablets and more.Read G
People rave about the Noco Boost GB40's power and reliability. I dig deeper, reading reviews from car owners and adventure seekers. Everyone says it's compact, portable, and super easy to use. What really grabs me? The ultraafe technology. No sparks, no mistakes. I'm always worried about connecting cables wrong. This feature is genius.Watch P
The build quality feels premium and expensive. You get the impression that NOCO appeals to a higher-end market than the others - and despite the GBX45 costing a sizeable margin more than the competitors on test, we feel it's worth it.Read D
Overall, if you're looking for a reliable and versatile jump starter, the NOC Boost Plus GB40 is the best budget option on the market. Ready to experience the power and convenience of the Noo Boost Plus GB40 for yourself? Check it out. Now, before we unveil the top pick, don't forget to take a look at the description below for the latest deals on each of these items.Watch T
After using it a bunch, we trust the GB40 for everyday emergencies. It starts engines fast, even when the battery’s totally flat, and its small size means it’s always close by.Read P
Today, I’m making the case for the NOCO GB40 UltraSafe jump starter to see how it can help you get your vehicle started in a battery emergency.Read 1 1000A Portable Battery Booster & Power Bank Instagram post
Be ready for any roadside emergency with the NOCO Boost GB40 Jump Starter!View post I Instagram Instagram post
My noco jumped my dead 6.8 triton multiple times without recharging.View post C
Best for build quality: Noco Boost Plus GB40 – buy from AmazonRead S
I love how good this GB40 is. Worth every dollar.Watch H
Can personally recommend the Noco GB40.Read
3 mixed sources
Small and portableRead B
So, yeah, the NOC Boost GB40 can be a great tool, and thousands swear by it. But there's also a decent chance you'll get one that underperforms or dies early. If you buy it, just know it's not bulletproof.Watch A
On the con side, the GB40 isn't strong enough for larger diesel trucks or big V8 engines in extreme cold. So, if you need more power, the GB70 or GB150 models are better suited. Another drawback mentioned in reviews is that it only comes with a USB cable, not a wall charger, which some users found inconvenient.Watch
7 unconvinced sources
The worst investment in tools ever. The gb40 was purchased in Belding Michigan at a parts plus auto parts. Product was worthless. wouldn’t jump start anything bigger than a lawn mower. The solution was to pay the shipping to send it back to the manufacturer and wait for them to decide if it was out of specs. I will be filing a complaint with the better business as well.Read J
The GB40 cannot be used for trickle charging any 12-volt lead-acid or lithium-ion batteries. It does not support slow charging modes and is not designed to monitor or adjust charging amperage based on battery state of charge. If you need a device capable of both jump-starting and trickle charging, other products such as the NOCO Battery Genius 10 offer those features.Read W
My brand-new, fully charged GB40 was unable to get my V6 3.5 L Toyota started after leaving the radio on. Followed all instructions to a T, trying with /without protect/override. Engine cranked for .25-.5 sec, but cut out before it had a chance to start. Confirmed the GB40 was still reading 100% charge per its lights after the attempts.Watch B
Noco GB40 is not to be compared with the Gooloo GP4000. The Noco is for smaller engines and the Gooloo will handle better those diesel engines. Real amp of the Noco is 244A while Gooloo is 619A, meaning Gooloo will be able to crank those dead diesel engines. Gooloo GP4000 should be compared with the Noco GB70 and the Wolfbox 4000A.Watch V r/VEDC u/McCoppinScrap · owner
I tried to start my car with the GB40, but while it got the lights to come on, the engine just wouldn't quite turn over, and after 3 attempts, the Noco's charge was depleted. My car doesn't have a huge engine or anything (Subaru Forester), but it gets pretty cold where I live.Read thread J
Totally dead.used the key to get the GB40 out.put it on and it just lit up the dash and grunted the starter.Read F Facebook Nathanael Warden · owner
Up until last month, I'd have recommended this one, but not anymore!View post
Frequently asked questions
It ranks #2 of 14 on our jump starters tier list, in A tier. That placement draws on 38 cited sources across 36 outlets.
7 of the 37 sources with a clear view are critical of it, among them BTG Reviews, Facebook and Jeep Garage - Jeep Forum. Lower output compared to newer models. Not ideal for large engines or frequent use.
Ranked nearby in Jump Starters
A tier #1 Gooloo GT6000
B tier #3 Wolfbox MV24 4000A
B tier #4 1 of 5 research runs entered this as a product to avoid rather than a pick. NOCO Boost X GBX155
B tier #5 AstroAI S8
B tier #6 1 of 7 research runs entered this as a product to avoid rather than a pick. Clore Automotive JNC770R
C tier #7 1 of 4 research runs entered this as a product to avoid rather than a pick. NOCO Boost X GBX55
D tier #11 2 of 6 research runs entered this as a product to avoid rather than a pick. Gooloo A3
D tier #12 2 of 4 research runs entered this as a product to avoid rather than a pick. ANCEL BS300
D tier #13 1 of 4 research runs entered this as a product to avoid rather than a pick. NOCO Boost X GBX45
F tier #14 3 of 7 research runs entered this as a product to avoid rather than a pick.