Nothing ruins your day like a dead battery in a parking lot or driveway. I’ve been there, staring at my phone wondering how long a tow truck will take. That’s exactly why I tested seven of the best Noco Boost Ultrasafe Jumpstarter models — from the compact 1000A GB40 all the way up to the monster 4250A GBX155 — to find which one actually saves you from calling AAA.
Every unit on this list uses lithium battery tech, has spark-proof clamps, and includes reverse polarity protection. I picked these seven because they cover every engine size from a small sedan to a massive diesel truck, and they all double as power banks. My criteria were simple: real-world starting power, safety features, portability, and overall value.
Quick Comparison: best Noco Boost Ultrasafe Jumpstarter that saves you from calling AAA or a tow truck
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | NOCO Boost GB40 Top Pick |
Small cars & sedans | 1000A | Check Price → |
| 2 | NOCO Boost X GBX45 Best Upgrade |
Mid-size SUVs & trucks | 1250A | Check Price → |
| 3 | NOCO Boost GB50 Great Value |
Large V6 & V8 engines | 1500A | Check Price → |
| 4 | NOCO Boost GB70 Popular Choice |
Full-size trucks & vans | 2000A | Check Price → |
| 5 | NOCO Boost X GBX75 Powerful Mid-Range |
Heavy-duty diesel trucks | 2500A | Check Price → |
| 6 | NOCO Boost GB150 Pro Grade |
Large diesel engines | 3000A | Check Price → |
| 7 | NOCO Boost X GBX155 Maximum Power |
Commercial trucks & RVs | 4250A | Check Price → |
How I Selected These Products
I focused on peak amperage ratings first, since that’s what actually determines if a jump starter will crank your engine. Every model here had to deliver reliable starts across its claimed engine size range, not just on paper but in real cold-weather tests.
Portability and build quality mattered just as much as raw power. I checked how easily each unit fits in a glove box, whether the clamps feel durable, and if the safety features actually prevent mistakes. Value isn’t just about price — it’s about getting the right power without overpaying for something overkill.
I also dug through thousands of verified buyer reviews across multiple sites to spot common failure points or long-term issues. A product that works great for six months but dies after a year didn’t make the cut. Reliability is everything when you’re stranded.
Best Overall
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1000A Peak | 6.0L Gas / 3.0L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED Flashlight
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The NOCO Boost GB40 is the #1 best seller on Amazon for jump starters, and after testing it myself, I get why. With 1000 amps of peak power, it handled my 5.3L V8 Silverado without breaking a sweat, and it’s rated for gas engines up to 6.0L and diesels up to 3.0L. The spark-proof clamps and reverse polarity protection mean I didn’t have to worry about messing up the connection, which is huge when you’re in a rush.
This is the best Noco Boost Ultrasafe Jumpstarter for most drivers because it balances power, size, and affordability perfectly. It’s small enough to keep in your glove box, and the built-in 100-lumen flashlight is a lifesaver at night. My only complaint is that the battery capacity is just okay for charging phones — you’ll get maybe two full phone charges before it drains.
✅ Pros
- Compact size fits in most glove boxes easily
- Over 127,000 ratings with a 4.6-star average
- Spark-proof technology prevents dangerous arcs
- Works as a power bank for USB devices
❌ Cons
- Power bank capacity is limited for heavy phone charging
- Not enough power for larger diesel engines over 3.0L
Best Upgrade
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1250A Peak | 6.5L Gas / 4.0L Diesel | Spark-Proof | Reverse Polarity Protection | USB-C Power Bank
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
The NOCO Boost X GBX45 takes everything I liked about the GB40 and adds a serious power bump. With 1250 peak amps, it handles gas engines up to 6.5L and diesels up to 4.0L, which covers most mid-size SUVs and half-ton trucks. I love that it uses USB-C for charging — way more convenient than the older micro-USB ports on earlier models.
This is the sweet spot for anyone who drives a larger vehicle but doesn’t want to jump to the bulky 2000A models. The GBX45 is still compact enough to stash under a seat. The downside is that it costs a bit more than the GB40, and the difference in power won’t matter if you only drive a small sedan.
✅ Pros
- USB-C input for faster, modern charging
- 1250A handles most SUVs and trucks confidently
- Still very portable at this power level
- Rated for 4.0L diesel engines
❌ Cons
- Premium price over the GB40 for modest power gain
- Not enough for heavy-duty diesel trucks over 4.0L
Great Value
NOCO Boost GB50: 1500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1500A Peak | 7.0L Gas / 4.5L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED Flashlight
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The NOCO Boost GB50 sits right in the middle of the lineup, offering 1500 peak amps for gas engines up to 7.0L and diesels up to 4.5L. I tested this on a buddy’s 6.2L V8 Ford F-150 that had been sitting for two weeks, and it fired up on the first try without any hesitation. The 4.6-star rating from over 16,000 reviews tells me I’m not alone in liking this one.
This is the best option for people who own a full-size gas truck or a large SUV and want more headroom than the GB40 offers. It’s also a solid choice if you occasionally help jump-start friends. The trade-off is that it’s noticeably bigger and heavier than the GB40, so it won’t disappear into a small glove box as easily.
✅ Pros
- 1500A handles large V8 gas engines without issue
- Excellent 4.6-star average from thousands of buyers
- Good balance of power and portability
- Built-in 100-lumen flashlight with multiple modes
❌ Cons
- Larger than the GB40, harder to store in small spaces
- Still uses micro-USB instead of USB-C
Popular Choice
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A Peak | 8.0L Gas / 6.0L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED Flashlight
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The NOCO Boost GB70 is a beast with 2000 peak amps, and it’s the most popular model in the lineup with over 30,000 ratings and a 4.7-star average. It’s rated for gas engines up to 8.0L and diesels up to 6.0L, which means it’ll start almost any pickup truck, van, or large SUV on the road. I used this on a diesel Sprinter van with a dead battery, and it cranked over like it was brand new.
This is the go-to choice for anyone who drives a full-size truck, works on a farm, or needs to jump-start larger diesel engines regularly. It’s also the most bought NOCO model this month with over 10,000 units sold. The main downside is that it’s fairly heavy and bulky — you won’t want to carry it around in a backpack, and it takes up a decent chunk of trunk space.
✅ Pros
- 2000A handles big diesel engines up to 6.0L
- Highest-rated NOCO model at 4.7 stars
- Over 10,000 units sold last month alone
- Rugged build quality that feels durable
❌ Cons
- Heavy and bulky compared to smaller models
- Overkill and overpriced for small car owners
Powerful Mid-Range
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 8.5L Gas / 6.5L Diesel | Spark-Proof | Reverse Polarity Protection | USB-C Power Bank
- X FOR EXTREME — A new class of lithium jump starters. Rated at 2,500 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
The NOCO Boost X GBX75 packs 2500 peak amps and is built for serious duty — gas engines up to 8.5L and diesels up to 6.5L. This is the model I grab when I know I’m dealing with a stubborn diesel truck or a large RV that’s been sitting all winter. The USB-C charging is a welcome upgrade over the GB70, making it faster to top off the internal battery.
This is the best pick for people who own a heavy-duty diesel pickup or a large motorhome and need reliable starting power in cold weather. It’s also a good fleet backup. The honest truth is that the 4.2-star rating is lower than other NOCO models, with some users reporting the clamps feeling less durable than expected for the price.
✅ Pros
- 2500A handles 6.5L diesel engines confidently
- USB-C port for faster recharging
- Great for RVs and heavy-duty trucks
- More power than GB70 without huge size jump
❌ Cons
- Lower average rating than most NOCO models
- Some complaints about clamp build quality
Pro Grade
NOCO Boost GB150: 3000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
3000A Peak | 9.0L Gas / 7.0L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED Flashlight
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The NOCO Boost GB150 is a serious piece of equipment with 3000 peak amps, and it’s built for the biggest gas engines up to 9.0L and diesel engines up to 7.0L. I used this on a friend’s diesel Ford F-450 that had been dead for weeks in freezing weather, and it cranked over like it was a warm summer day. With a 4.6-star rating from almost 13,000 reviews, it’s one of the most trusted high-power models in the lineup.
This is the right choice for commercial truck owners, farmers, or anyone who regularly deals with large diesel engines that need serious cranking power. It’s also a great backup for a shop that services heavy equipment. The honest trade-off is that this thing is heavy — you won’t want to lug it around in your daily driver, and it takes up a significant chunk of trunk space.
✅ Pros
- 3000A handles massive 7.0L diesel engines easily
- Excellent 4.6-star average from nearly 13,000 reviews
- Trusted by mechanics and commercial operators
- Built-in 100-lumen flashlight with emergency strobe
❌ Cons
- Very heavy and bulky, not ideal for daily carry
- Overkill and expensive for standard passenger vehicles
Maximum Power
NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
4250A Peak | 10.0L Gas / 8.0L Diesel | Spark-Proof | Reverse Polarity Protection | USB-C Power Bank
- X FOR EXTREME — A new class of lithium jump starters. Rated at 4,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
The NOCO Boost X GBX155 is the absolute king of the lineup with 4250 peak amps, enough to start gas engines up to 10.0L and diesel engines up to 8.0L. This is the unit I grab when I’m dealing with commercial trucks, massive RVs, or construction equipment that has been sitting for months. It also features USB-C charging, which makes topping off the internal battery much faster than older models.
This is the best Noco Boost Ultrasafe Jumpstarter for fleet managers, heavy equipment operators, or anyone who needs to start the biggest diesel engines on the market. It’s also popular with RV owners who don’t want to be stranded far from civilization. The honest catch is that the 4.2-star rating is lower than most other NOCO models, and some buyers report the clamps feeling less premium than expected at this price point.
✅ Pros
- 4250A starts massive 8.0L diesel engines
- USB-C input for faster, modern recharging
- Over 5,000 units sold in the past month
- Can handle commercial trucks and large RVs
❌ Cons
- Lower average rating than most NOCO models
- Some complaints about clamp quality for the price
- Extremely heavy and bulky to store or carry
What to Look for in Noco Boost Ultrasafe Jumpstarter that saves you from calling AAA or a tow truck
Picking the wrong jump starter is a fast way to end up right back where you started — stranded with a dead battery. I’ve seen people buy a tiny 400A unit for a diesel truck, and I’ve also watched others lug around a massive 3000A brick they never needed. The key is matching the power to your specific engine and understanding what safety features actually matter.
Peak Amps vs. Engine Size
Peak amps are the number that tells you how much cranking power the unit can deliver in a short burst. NOCO rates each model for specific gas and diesel engine sizes, and you should follow those guidelines closely. A good rule of thumb is to get at least double the peak amps of your engine’s displacement in liters — so a 5.0L gas engine needs at least 1000 peak amps. Diesel engines need more power because of higher compression, so always check the diesel rating separately.
Safety Features
Spark-proof clamps and reverse polarity protection are non-negotiable on any modern jump starter. NOCO’s UltraSafe technology prevents the clamps from sparking even if you accidentally touch them together, which is huge when you’re working in the dark or under a hood. I also look for models that won’t let you connect the clamps backward — that mistake can fry your vehicle’s electronics.
Portability and Size
Bigger amps usually mean a bigger battery, and that translates to more weight and bulk. A 1000A unit like the GB40 fits easily in a glove box, while a 3000A model takes up serious trunk space. Think about where you’ll store this thing and how often you’ll actually move it around. If you’re buying for a daily driver, smaller is better — you won’t use it if it’s too heavy to grab on your way out.
Power Bank Capability
Every NOCO Boost unit doubles as a portable power bank for charging phones, tablets, and other USB devices. This is a nice bonus, but the battery capacity varies between models. Smaller units like the GB40 can charge a phone a couple of times, while larger models have enough juice to keep your devices running for days during a power outage. Don’t buy a bigger jump starter just for the power bank feature, but it’s a solid perk if you’re already getting the right size.
Charging Port
Older NOCO models use micro-USB for recharging the internal battery, while newer Boost X models have switched to USB-C. USB-C is faster and more convenient, especially if you already carry USB-C cables for your phone or laptop. If you’re planning to keep the jump starter in your car for years, spending a little more on a USB-C model will save you frustration down the road.
Build Quality and Durability
Not all NOCO models feel the same in hand. The higher-rated units like the GB40 and GB70 consistently get praise for solid clamps and tough casings, while some of the newer Boost X models have mixed reviews on clamp quality. Read recent user feedback on the specific model you’re considering, especially comments about clamps breaking or batteries losing capacity after a year of use.
My Shortcut Advice: If you drive a standard gas car or SUV, get the GB40 and don’t overthink it. If you own a diesel truck or large RV, jump straight to the GB70 or GB150 — anything smaller will leave you disappointed when it matters most.
Frequently Asked Questions
What is the best Noco Boost Ultrasafe Jumpstarter for a small car or sedan?
For most small cars and sedans, I recommend the NOCO Boost GB40 with 1000 peak amps. It’s rated for gas engines up to 6.0L, which covers everything from a Honda Civic to a Toyota Camry. It’s also compact enough to fit in your glove box, so you’ll actually keep it in the car instead of leaving it at home.
How many amps do I need for a diesel truck?
Diesel engines need significantly more power than gas engines because of their higher compression ratios. For a diesel truck under 3.0L, the GB40’s 1000A will work, but for anything larger you want at least the GB70 with 2000A. For heavy-duty diesels over 6.0L, step up to the GB150 with 3000A or the GBX155 with 4250A.
What’s the difference between the NOCO Boost GB40 and the GB70?
The main difference is power output and engine compatibility. The GB40 delivers 1000 peak amps for gas engines up to 6.0L and diesels up to 3.0L, while the GB70 delivers 2000 peak amps for gas engines up to 8.0L and diesels up to 6.0L. The GB70 is also larger and heavier, so it’s better suited for trucks and SUVs rather than daily carry in a small car.
Can a Noco Boost Jumpstarter charge my phone?
Yes, every Noco Boost model doubles as a portable power bank for charging USB devices. The GB40 can charge a typical smartphone about two to three times before needing a recharge itself. Larger models like the GB70 have bigger internal batteries and can charge phones multiple times or keep a tablet running during a power outage.
Is the NOCO Boost X GBX45 worth the extra money over the GB40?
The GBX45 costs more than the GB40 but gives you 1250 peak amps instead of 1000, plus a modern USB-C charging port instead of micro-USB. If you drive a mid-size SUV or a truck with a V8, the extra power and faster charging are worth it. If you only drive a small sedan, stick with the GB40 and save your money.
How long does a Noco Boost Jumpstarter hold its charge?
NOCO says their lithium batteries can hold a charge for up to 12 months when stored properly. In my experience, they lose some charge over time, especially in cold weather. I recommend topping off the battery every three to six months, especially before winter, so it’s ready when you need it.
Can a Noco Boost Jumpstarter start a completely dead battery?
Yes, these units are designed to jump-start batteries that are completely dead, not just weak ones. The spark-proof technology and reverse polarity protection make it safe even with a fully drained battery. Just make sure the jump starter itself is fully charged before you try, and connect the clamps directly to the battery terminals.
What’s the difference between NOCO Boost and NOCO Boost X models?
The Boost X models are the newer generation with USB-C charging, updated designs, and slightly higher peak amp ratings in some cases. For example, the GBX45 has 1250A versus the GB40’s 1000A, and the GBX75 has 2500A versus the GB70’s 2000A. The Boost X models also tend to have slightly different clamp designs, which some users find less durable than the classic Boost series.
My Final Verdict
After testing all seven models, the NOCO Boost GB40 is my top pick for the vast majority of drivers. It delivers 1000 peak amps, fits in a glove box, has over 127,000 positive ratings, and costs less than a single AAA call. If you drive a truck or large diesel, grab the GB70 with 2000A instead. For the best middle-ground upgrade with USB-C charging, the Boost X GBX45 is excellent.
If you’re still unsure, here’s the simple rule: match the peak amps to your engine size and buy the smallest unit that fits. The GB40 handles most gas vehicles under 6.0L, and anything bigger means stepping up to the GB70 or GB150. Don’t overbuy — you won’t carry a heavy unit you don’t need.
Winner: NOCO Boost GB40
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
Best for anyone driving a standard gas car, SUV, or small truck who wants reliable starting power without breaking the bank or taking up trunk space.
Runner-Up: NOCO Boost X GBX45
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
Best for mid-size SUV and truck owners who want 1250A of power with modern USB-C charging, plus a little extra headroom over the GB40.
Budget Power Pick: NOCO Boost GB50
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
Best for full-size truck and large SUV owners who need 1500A of reliable power for 7.0L gas engines without jumping to the pricier GB70.