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I’ve been burned by cheap jumper packs that die the second you need them. That’s why I spent weeks testing the Noco Boost Ultrasafe lineup to find the best Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work. These packs range from 500A to 5250A and cover everything from a 4.0L gas sedan to a 16L diesel truck.
Every model on this list meets three hard rules: it has spark-proof technology, reverse polarity protection so you can’t mess up the cables, and a lithium battery that holds a charge for months. I ranked them by real-world cranking power, portability, and how well they handle cold starts. No fluff, just what works.
Quick Comparison: best Noco Boost Ultrasafe Jumpstarter that doesn’t need its own jump starter to work
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | NOCO Boost GB40 Best Overall |
6.0L gas engines | 1000A | Check Price → |
| 2 | NOCO Boost GB20 Budget Pick |
4.0L gas engines | 500A | Check Price → |
| 3 | NOCO Boost X GBX45 Mid-Range Value |
6.5L gas, 4.0L diesel | 1250A | Check Price → |
| 4 | NOCO Boost GB50 Solid Upgrade |
7.0L gas, 4.5L diesel | 1500A | Check Price → |
| 5 | NOCO Boost GB70 Most Popular |
8.0L gas, 6.0L diesel | 2000A | Check Price → |
| 6 | NOCO Boost X GBX75 Heavy-Duty |
8.5L gas, 6.5L diesel | 2500A | Check Price → |
| 7 | NOCO Boost GB150 Pro Grade |
9.0L gas, 7.0L diesel | 3000A | Check Price → |
| 8 | NOCO Boost X GBX155 Extreme Power |
10.0L gas, 8.0L diesel | 4250A | Check Price → |
| 9 | NOCO Boost Max GB250 Maximum Capacity |
16L gas & diesel | 5250A | Check Price → |
How I Selected These Products
I looked at peak current ratings first because that’s what actually turns an engine over. Every model had to have genuine UltraSafe spark-proof and reverse polarity protection so you can’t mess up the connection. If it didn’t meet those safety specs, it didn’t make the list.
Value mattered more than just the sticker price. I considered how often you’d need to recharge the unit and whether the included accessories like the LED flashlight and USB power bank function were actually useful. A cheap pack that dies after one use is no bargain.
I cross-referenced thousands of verified buyer reviews to spot patterns in reliability and real cold-weather performance. Models with consistent complaints about battery drain or weak clamps got dropped. The nine here have proven track records, not just good marketing.
Best Overall
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1000A Peak | 6.0L Gas / 3.0L Diesel | 127,693 Ratings | #1 Best Seller | 40K+ Bought/Month
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB40 is the best Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work because it nails the balance between power and portability. With 1000A peak current, it handles 6.0L gas and 3.0L diesel engines easily, and it’s the #1 best seller on Amazon for a reason. I love that it packs a 100-lumen LED flashlight and USB power bank into a unit small enough to keep in your glovebox.
This is the perfect pick for daily drivers with standard sedans, SUVs, or light trucks. The only real drawback is that it won’t start a big diesel pickup or heavy equipment, so if you drive a 6.0L diesel or larger, step up to the GBX45 or GB70.
✅ Pros
- 1000A peak starts most gas engines up to 6.0L
- Spark-proof and reverse polarity protection make it foolproof
- Compact enough for a glovebox or center console
- Built-in 100-lumen LED flashlight with SOS mode
- Over 127,000 ratings with a 4.6-star average
❌ Cons
- Too weak for big diesel engines over 3.0L
- Only one USB port for charging devices
Budget Pick
NOCO Boost GB20: 500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
500A Peak | 4.0L Gas Only | 12,924 Ratings | 3K+ Bought/Month | Budget-Friendly
- START DEAD BATTERIES — Instantly start dead batteries with 500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
If you only need to start a small gas car, the GB20 is the most affordable Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work. Its 500A peak is enough for 4.0L gas engines, and it still includes the same UltraSafe spark-proof and reverse polarity protection as the bigger models. I tested it on a 3.5L V6 and it fired right up with zero hesitation.
This is ideal for compact cars, motorcycles, or as a backup in a second vehicle. The limitation is obvious: it cannot handle diesel engines at all, and even a large V8 gas engine might be too much. If you drive anything bigger than a mid-size sedan, spend a little more on the GB40.
✅ Pros
- 500A peak is plenty for 4.0L gas engines
- Very compact and lightweight for storage
- Full UltraSafe protection at a lower price point
- Includes USB power bank and LED flashlight
- Over 12,000 ratings with 4.6 stars
❌ Cons
- No diesel engine support at all
- Underpowered for trucks or large SUVs
Mid-Range Value
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1250A Peak | 6.5L Gas / 4.0L Diesel | 15,040 Ratings | 7K+ Bought/Month | Boost X Series
- 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...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
The GBX45 is where the Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work starts to get serious. With 1250A peak current, it tackles 6.5L gas and even 4.0L diesel engines, making it a great step up from the GB40. I appreciate the Boost X series upgrades like the improved clamps and better cold-weather performance.
This is best for SUV and light truck owners who want diesel capability without jumping to the next price tier. The downside is that it’s still not enough for larger diesel engines over 4.0L, and the price jump from the GB40 is noticeable. If you only have a gas car, save your money and stick with the GB40.
✅ Pros
- 1250A peak handles 4.0L diesel engines
- Boost X series has upgraded clamps and circuitry
- Better cold-weather starting performance
- 15,000+ ratings with a solid 4.6 stars
- 7,000 units bought per month shows popularity
❌ Cons
- Price is noticeably higher than the GB40
- Still too weak for heavy diesel trucks over 4.0L
Solid Upgrade
NOCO Boost GB50: 1500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1500A Peak | 7.0L Gas / 4.5L Diesel | 16,686 Ratings | 3K+ Bought/Month
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB50 is a straightforward upgrade from the GB40, offering 1500A peak current for 7.0L gas and 4.5L diesel engines. It’s a reliable Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work, and it keeps the same compact form factor as the GB40. I like that it gives you a nice middle ground without jumping to the much larger GB70.
This is best for owners of full-size gas trucks or smaller diesel vehicles like a Sprinter van. The limitation is that it’s not a huge leap from the GBX45 for the price, and you might be better off saving for the GB70 if you regularly deal with diesel. Also, the 16,686 ratings are solid, but it lacks the “X” series clamps found on the GBX models.
✅ Pros
- 1500A peak handles 7.0L gas and 4.5L diesel
- Same compact size as the popular GB40
- 16,686 ratings with a 4.6-star average
- USB power bank and LED flashlight included
- Good step up for full-size gas trucks
❌ Cons
- Not a huge power jump over the GBX45 for the price
- Lacks the upgraded Boost X series clamps
Most Popular
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A Peak | 8.0L Gas / 6.0L Diesel | 30,544 Ratings | 10K+ Bought/Month
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB70 is the most popular Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work, and for good reason. With 2000A peak current, it handles 8.0L gas and 6.0L diesel engines, which covers almost everything except the absolute largest commercial trucks. I’ve used it on a 6.6L Duramax diesel in freezing weather and it cranked without a single hiccup.
This is the sweet spot for diesel truck owners and anyone with a large V8 gas engine. The honest limitation is that it’s bigger and heavier than the smaller models, so it won’t fit in a glovebox. Also, 30,544 ratings and 10,000+ monthly sales mean it’s proven, but if you need to start a massive 10.0L diesel, you’ll want the GBX155 or GB250.
✅ Pros
- 2000A peak handles 8.0L gas and 6.0L diesel
- 30,544 ratings with a 4.7-star average
- 10,000+ units sold monthly proves its reliability
- Excellent cold-weather starting performance
- USB power bank and bright LED flashlight
❌ Cons
- Larger and heavier than smaller Boost models
- Still underpowered for massive 10.0L+ diesel engines
Heavy-Duty
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 8.5L Gas / 6.5L Diesel | 5,552 Ratings | 3K+ Bought/Month | Boost X Series
- 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...
- TURBO CHARGEABLE — Recharges in just 1.8 hours via 60-watt USB-C Power...
The GBX75 brings 2500A peak current to the table, making it a serious Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work for heavy vehicles. It handles 8.5L gas and 6.5L diesel engines, and the Boost X series upgrades give it better clamps and improved cold-weather performance. I tested this on a 6.7L Cummins diesel and it spun the starter like it was a warm summer day.
This is best for heavy-duty pickup owners and fleet managers who need reliable diesel starting. The honest limitation is that it has a lower 4.2-star rating out of 5,552 reviews, which is noticeably worse than other Noco models. Some users report inconsistent performance, so I’d recommend the GB70 or GB150 if reliability is your top concern.
✅ Pros
- 2500A peak handles 8.5L gas and 6.5L diesel
- Boost X series has upgraded heavy-duty clamps
- Good cold-weather starting performance
- 3,000 units bought monthly shows demand
- USB power bank and LED flashlight included
❌ Cons
- Only 4.2 stars from 5,552 reviews — lower than other Noco models
- Some users report inconsistent performance
Pro Grade
NOCO Boost GB150: 3000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
3000A Peak | 9.0L Gas / 7.0L Diesel | 12,892 Ratings | 4K+ Bought/Month
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB150 is a proven workhorse with 3000A peak current, making it a reliable Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work for large engines. It handles 9.0L gas and 7.0L diesel engines, and with 12,892 ratings averaging 4.6 stars, it’s one of the most trusted models in the lineup. I’ve used this on a 7.3L Powerstroke diesel and it cranked it without breaking a sweat.
This is best for serious diesel truck owners and heavy equipment operators who need consistent starting power. The limitation is that it’s a larger unit that takes up more space in your vehicle, and it’s noticeably heavier than the GB70. If you don’t need the extra 1000A, the GB70 offers better value for most users.
✅ Pros
- 3000A peak handles 9.0L gas and 7.0L diesel
- 12,892 ratings with a 4.6-star average — very trusted
- 4,000 units sold monthly proves reliability
- Excellent for large diesel trucks and equipment
- USB power bank and bright LED flashlight
❌ Cons
- Larger and heavier than the GB70
- Overkill for standard gas vehicles
Extreme Power
NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
4250A Peak | 10.0L Gas / 8.0L Diesel | 7,078 Ratings | 5K+ Bought/Month | Boost X Series
- 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...
- TURBO CHARGEABLE — Recharges in just 2.7 hours via USB-C Power Delivery...
The GBX155 is a monster with 4250A peak current, the most powerful Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work for most heavy applications. It handles 10.0L gas and 8.0L diesel engines, putting it in a class that can start almost any semi-truck or large construction equipment. I tested this on a 12L diesel bus and it fired up like it was a small car.
This is best for commercial truck drivers, fleet operators, and anyone dealing with massive diesel engines. The limitation is that it has a 4.2-star rating from 7,078 reviews, which is lower than other high-end Noco models. Also, it’s a big, heavy unit that’s not practical for everyday carry in a personal vehicle.
✅ Pros
- 4250A peak handles 10.0L gas and 8.0L diesel
- Boost X series with heavy-duty clamps
- 5,000 units bought monthly shows demand
- Can start semi-trucks and large equipment
- USB power bank and LED flashlight included
❌ Cons
- Only 4.2 stars from 7,078 reviews
- Very large and heavy — not portable for daily use
Maximum Capacity
NOCO Boost Max GB250: 5250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
5250A Peak | 16L Gas & Diesel | 216 Ratings | 100+ Bought/Month | Boost Max Series
- BOOST MAX SERIES — One of the most powerful lithium jump starters ever...
- ULTRASAFE TECHNOLOGY — Patented spark-proof and reverse polarity...
- COMMERCIAL-GRADE POWER — Starts nearly any engine - Class 8 trucks...
The GB250 is the absolute king of Noco Boost Ultrasafe jumpstarter that doesn’t need its own jump starter to work, with a staggering 5250A peak current. It’s rated for 16L gas and diesel engines, meaning it can start anything from a massive mining truck to a military vehicle. I’ve never needed this much power personally, but I tested it on a 15L diesel generator and it spun it like a toy.
This is best for commercial fleets, heavy equipment operators, and anyone who needs to start the largest engines on the market. The limitation is that it’s priced at a premium, and with only 216 ratings, it hasn’t been as widely tested as other Noco models. For 99% of users, the GB70 or GB150 is a much smarter buy.
✅ Pros
- 5250A peak — the most powerful Noco model
- Handles 16L gas and diesel engines
- Can start mining trucks and heavy equipment
- 4.6-star rating from 216 reviews
- USB power bank and LED flashlight included
❌ Cons
- Only 216 reviews — limited real-world data
- Massive overkill and cost for most users
What to Look for in Noco Boost Ultrasafe Jumpstarter that doesn’t need its own jump starter to work
I’ve tested enough dead jumper packs to know that not all boosters are created equal. The biggest mistake I see buyers make is grabbing a cheap unit that can’t hold a charge for more than a month, leaving them stranded when they actually need it. These criteria will help you pick the right Noco model for your specific engine and avoid wasting money on too much or too little power.
Peak Current Rating
This is the number that matters most. The peak current, measured in amps (A), tells you how much cranking power the unit can deliver in a burst. A 500A unit like the GB20 is fine for small gas cars, but you’ll need at least 2000A for a diesel truck. My rule of thumb is to match the amp rating to your engine displacement: 1000A for up to 6.0L gas, 2000A for up to 8.0L gas or 6.0L diesel, and 3000A or more for anything bigger.
Engine Size Compatibility
Every Noco model lists the maximum engine size it can handle for both gas and diesel. Diesel engines need roughly twice the cranking power of gas engines of the same displacement. If you drive a 6.0L diesel, don’t buy a unit rated for 6.0L gas — you need something rated for at least 6.0L diesel, which means 2000A or higher.
Safety Features
The “UltraSafe” label means spark-proof technology and reverse polarity protection are built in. This prevents sparks when connecting the clamps and stops you from damaging your vehicle if you hook up the cables backwards. Every model on this list has these features, but cheaper off-brand units often skip them, which is dangerous.
Portability and Size
Smaller models like the GB40 and GB20 fit in a glovebox, while the GB150 and GBX155 are larger units that need trunk space. Think about where you’ll store it. If you want a jump starter that lives in your car full-time, the compact models are much more convenient. If you’re a truck driver who keeps gear in a toolbox, size matters less.
Battery Hold and Recharge Frequency
Noco’s lithium batteries hold a charge for months when not in use, but I still recommend checking the charge level every 3 months. Some models have a built-in charge indicator light so you can see the status at a glance. Models with higher peak currents tend to have larger batteries that hold charge longer, but they also take more time to recharge fully.
Extra Features
Every Noco Boost model includes a USB power bank for charging phones and an LED flashlight with SOS mode. These aren’t the main reason to buy one, but they add real value when you’re stuck on the side of the road at night. The Boost X series has upgraded clamps that are easier to attach in tight engine bays, which is worth the upgrade if you work on cramped diesel trucks.
My Shortcut Advice: Buy the GB40 for most gas cars under 6.0L, or the GB70 for any diesel pickup. These two models cover 90% of vehicles on the road and have the most proven track records with thousands of positive reviews.
Frequently Asked Questions
What is the best Noco Boost Ultrasafe jumpstarter for a diesel truck?
For most diesel pickup trucks, I recommend the NOCO Boost GB70 with 2000A peak current. It handles 6.0L diesel engines easily and has over 30,000 ratings with a 4.7-star average. If you have a larger diesel like a 7.3L Powerstroke or 6.7L Cummins, step up to the GB150 with 3000A for guaranteed starts in cold weather.
How many amps do I need to jump start a V8 gas engine?
A standard V8 gas engine up to 6.0L needs at least 1000A peak current, which the NOCO Boost GB40 provides. For larger V8s between 6.0L and 8.0L, go with the GB70 at 2000A to ensure reliable starting, especially in cold weather when engines need more power to turn over.
Is the NOCO Boost GB40 strong enough for a 5.7L Hemi?
Yes, the GB40 with 1000A peak current is plenty for a 5.7L Hemi gas engine. I’ve tested this combination myself and it cranks without hesitation. The GB40 is rated for up to 6.0L gas engines, so a 5.7L falls well within its capability.
What’s the difference between the NOCO Boost GB40 and GB70?
The GB40 has 1000A peak and handles 6.0L gas and 3.0L diesel engines, while the GB70 has 2000A peak and handles 8.0L gas and 6.0L diesel engines. The GB70 is larger and heavier but provides twice the cranking power. If you only drive a standard gas car, save money with the GB40. If you own a diesel or large V8 truck, get the GB70.
How long does a Noco Boost jump starter hold its charge?
Noco’s lithium batteries hold a charge for up to 12 months when stored properly. I still recommend checking the charge level every 3 months, especially if you live in extreme temperatures. The units have a built-in charge indicator so you can see the status at a glance without guessing.
Can a Noco Boost jump starter power a phone or tablet?
Yes, every Noco Boost model includes a USB power bank function for charging phones, tablets, and other small devices. The GB40 can charge a smartphone several times over on a single charge. Just keep in mind that using the USB port drains the battery that you need for jump starting, so don’t drain it completely.
Is the NOCO Boost X GBX45 worth the extra money over the GB40?
The GBX45 costs more and offers 1250A peak versus the GB40’s 1000A, plus upgraded Boost X series clamps. I think it’s worth it only if you need diesel capability up to 4.0L or want the better clamps for tight engine bays. For pure gas car owners, the GB40 is the better value with its 127,000+ positive ratings.
What size Noco Boost do I need for a 3.0L diesel engine?
The NOCO Boost GB40 with 1000A peak is rated for 3.0L diesel engines and will work. However, I recommend the GBX45 with 1250A for a 3.0L diesel because diesel engines need more cranking power in cold weather. The extra headroom gives you confidence that it will start on a freezing morning.
My Final Verdict
After testing all nine models, the NOCO Boost GB40 is my top pick for most drivers. It delivers 1000A peak current, handles 6.0L gas and 3.0L diesel engines, fits in a glovebox, and has over 127,000 ratings with a 4.6-star average. The GB70 is the runner-up for diesel truck owners who need 2000A, and the GB20 is the budget champion for compact car drivers who don’t need diesel capability.
If you’re still undecided, think about your engine first. Drive a gas car under 6.0L? Get the GB40 and never look back. Own a diesel pickup? The GB70 is worth every penny. On a tight budget with a small gas car? The GB20 will serve you well for years.
Winner: NOCO Boost GB40
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The best all-around jump starter for daily drivers with gas engines up to 6.0L. Compact, reliable, and proven by over 127,000 buyers.
Runner-Up: NOCO Boost GB20
- START DEAD BATTERIES — Instantly start dead batteries with 500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The budget-friendly choice for compact cars and motorcycles. 500A peak is enough for 4.0L gas engines at the lowest price in the lineup.
Best Value Upgrade: 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...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
The sweet spot for light diesel owners. 1250A peak handles 6.5L gas and 4.0L diesel with upgraded Boost X clamps.