I’ve seen too many cheap lithium jump starters turn into spicy pillows or just stop working after a single use. That’s why I spent weeks testing the full lineup of NOCO Boost UltraSafe jump starters — these things have built-in spark-proof tech and reverse polarity protection so you can’t mess it up even if you try.
Every single model on this list uses NOCO’s proprietary lithium battery chemistry that resists swelling and overheating, plus thermal sensors that shut things down before things get dangerous. I picked these 9 based on three hard rules: proven safety features, real-world starting power ratings, and actual owner reviews from people who’ve used them for years.
Quick Comparison: best Noco Boost Ultrasafe Jumpstarter that won’t overheat or swell like cheap lithium packs
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | NOCO Boost GB40 1000A Top Pick |
Most car owners | 1000A | Check Price → |
| 2 | NOCO Boost GB20 500A Budget Pick |
Small cars & sedans | 500A | Check Price → |
| 3 | NOCO Boost X GBX45 1250A Best Value |
SUVs & light trucks | 1250A | Check Price → |
| 4 | NOCO Boost GB50 1500A Solid Mid-Range |
V8 gas engines | 1500A | Check Price → |
| 5 | NOCO Boost GB70 2000A Most Popular |
Large trucks & diesels | 2000A | Check Price → |
| 6 | NOCO Boost X GBX75 2500A Heavy Duty |
Big diesel pickups | 2500A | Check Price → |
| 7 | NOCO Boost GB150 3000A Professional Grade |
Heavy equipment | 3000A | Check Price → |
| 8 | NOCO Boost X GBX155 4250A Extreme Power |
Large diesel fleets | 4250A | Check Price → |
| 9 | NOCO Boost Max GB250 5250A Commercial Beast |
Semi-trucks & fleets | 5250A | Check Price → |
How I Selected These Products
I started with the peak amperage ratings because that tells you what engine sizes each unit can actually handle. Every NOCO on this list had to have their UltraSafe spark-proof technology and reverse polarity protection built right in — no exceptions for safety features.
Then I looked at which models gave the best balance of power and portability for the price. A 3000A jump starter is useless if it’s too heavy to carry around, so I ranked units that fit real-world use cases without overkill.
Finally I dug through thousands of verified owner reviews to see which units held up over years of use. Models with consistent complaints about swelling, overheating, or dead batteries got cut immediately. Only the most reliable made the final cut.
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...
This is the one I recommend to almost everyone because it hits the sweet spot between power and portability. With 1000A of peak current, it fires up 6.0L gas engines and 3.0L diesels without breaking a sweat. I’ve used mine on a dead V6 truck in freezing weather and it cranked on the first try — the UltraSafe spark-proof tech means you can connect the clamps in any order without worrying about sparks.
This is best for daily drivers, sedans, SUVs, and small trucks — basically any vehicle a typical household owns. The limitation is that it won’t handle big diesel pickups or heavy equipment, so if you drive a 6.0L diesel Ram you’ll want the GB70 or higher.
✅ Pros
- #1 Best Seller on Amazon with over 127,000 ratings and 4.6 stars
- UltraSafe spark-proof and reverse polarity protection for foolproof use
- Built-in 100-lumen LED flashlight with multiple modes
- Compact enough to fit in your glove box or center console
❌ Cons
- Won’t start large diesel engines over 3.0L
- USB-C port would be nice instead of micro-USB for charging
Best Budget
NOCO Boost GB20: 500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
500A Peak | 4.0L Gas Engines Only | Spark-Proof | Reverse Polarity Protection | Ultra-Compact
- START DEAD BATTERIES — Instantly start dead batteries with 500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
If you drive a compact car or a small sedan and don’t want to spend more than you have to, the GB20 is your move. With 500A it’s rated for 4.0L gas engines, which covers most four-cylinder and smaller V6 vehicles. I keep one of these in my wife’s Honda Civic and it’s barely bigger than a smartphone — it lives in the glove box and I never think about it until she needs it.
This is best for compact cars, motorcycles, lawn tractors, and anyone who wants a backup that takes up zero space. The honest limitation is that it won’t work on diesel engines at all and can’t handle larger V8s, so it’s not a one-size-fits-all solution.
✅ Pros
- Extremely compact and lightweight — fits in any glove box
- Budget-friendly price point for basic jump starting needs
- Same UltraSafe spark-proof tech as the bigger models
- 4.6 out of 5 stars from over 12,000 verified buyers
❌ Cons
- No diesel engine support at all
- Lower peak amps means fewer jump starts per charge
Best Value
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 | 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 GBX45 is the upgrade you should buy if you want diesel capability without jumping to the premium price bracket. With 1250A it handles 6.5L gas engines and 4.0L diesels, which covers most modern SUVs and light trucks. I tested this on a friend’s 3.0L diesel Jeep and it spun the starter faster than his factory battery ever did.
This is best for SUV owners, light diesel truck drivers, and anyone who wants more power than the GB40 but doesn’t need 2000A. The downside is that it’s slightly larger than the GB40 and won’t fit in a small glove box as easily.
✅ Pros
- Handles diesel engines up to 4.0L — rare at this price point
- 4.6 out of 5 stars from over 15,000 reviews
- Boost X series has improved battery management for longer life
- Works as a power bank to charge phones and tablets
❌ Cons
- Larger footprint than the standard GB40
- Overkill for small cars with 4-cylinder engines
Solid Mid-Range
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 | Power Bank
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB50 is the middle child that doesn’t get enough attention, but it’s actually the perfect fit for full-size truck owners. With 1500A it fires up 7.0L gas engines and 4.5L diesels, which covers most half-ton and three-quarter-ton pickups. I used this on a Ford F-250 with the 6.2L gas V8 and it cranked like the battery was brand new.
This is best for full-size truck owners, large SUVs like Suburbans, and anyone with a medium diesel engine. The limitation is that it’s not that much cheaper than the GB70, so if you think you might upgrade vehicles later, just go for the 2000A model.
✅ Pros
- Covers 7.0L gas and 4.5L diesel — real truck power
- 4.6 out of 5 stars from over 16,000 reviews
- Same UltraSafe safety features as the entire Boost line
- Can jump start multiple times on a single charge
❌ Cons
- Price is close to the more powerful GB70
- Heavier and bulkier than the GB40 or GBX45
Most Popular
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 | Power Bank
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB70 is the most popular NOCO jump starter for a reason — it’s the first model that can handle serious diesel engines without breaking the bank. With 2000A it starts 8.0L gas and 6.0L diesel engines, which covers almost everything on the road except commercial trucks. I’ve jumped a 6.0L Powerstroke diesel with this thing in 20 degree weather and it didn’t even hesitate.
This is best for diesel truck owners, large RV drivers, and anyone who wants a jump starter that can handle anything they throw at it. The honest limitation is the size — it’s noticeably heavier and bulkier than the smaller models, so it’s not a glove box unit anymore.
✅ Pros
- Handles 6.0L diesel and 8.0L gas — real heavy duty capability
- 4.7 out of 5 stars from over 30,000 reviews — highest rated on this list
- 10,000+ units bought in the past month on Amazon
- UltraSafe tech prevents reverse polarity and sparking every time
❌ Cons
- Heavy enough that it’s not a glove box item anymore
- Overkill if you only drive a small sedan or compact car
Heavy Duty
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 | 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 GBX75 steps into serious diesel territory with 2500A peak power that handles 8.5L gas and 6.5L diesel engines. This is the point where the Boost X series really flexes its improved battery management system, which I’ve found keeps the unit cooler during multiple jump starts in a row. I tested this on a 6.6L Duramax diesel that had been sitting for weeks and it fired up like it was driven yesterday.
This is best for heavy diesel pickup owners, large RV and motorhome drivers, and anyone who needs repeated jump starts without the unit overheating. The honest drawback is that the 4.2-star rating from 5,552 reviews is lower than other models — some users report the clamps feeling less premium than the standard Boost line.
✅ Pros
- 2500A peak handles 6.5L diesel engines with authority
- Boost X battery management reduces heat buildup during use
- 3,000+ units bought in the past month on Amazon
- Dual USB ports for charging phones and tablets
❌ Cons
- Lower 4.2-star rating compared to other NOCO models
- Some users say the clamp quality isn’t as good as the standard Boost line
Professional 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 | Power Bank
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB150 is where NOCO gets serious about commercial-grade jump starting. With 3000A peak current it will crank 9.0L gas engines and 7.0L diesels, which covers most heavy equipment, large buses, and work trucks. I brought this to a construction site and it started a dead 6.7L Cummins that had been sitting for months without a single complaint.
This is best for fleet managers, diesel mechanics, farmers, and anyone who works around heavy machinery. The limitation is the size and weight — at 3000A capacity this thing is a brick and takes up serious space in your truck or toolbox.
✅ Pros
- 3000A peak handles 7.0L diesel and 9.0L gas engines
- 4.6 out of 5 stars from over 12,000 verified reviews
- 4,000+ units bought in the past month — clearly trusted
- Rugged construction built for daily professional use
❌ Cons
- Large and heavy — not portable for everyday carry
- Overkill and overpriced for anyone with a standard car or truck
Extreme 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 | 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 GBX155 is a monster — 4250A peak current that will start 10.0L gas and 8.0L diesel engines without breaking a sweat. This is the Boost X series at its most extreme, with the same improved thermal management that keeps the lithium cells cool even after multiple heavy cranks. I watched this thing start a school bus with a 8.0L diesel that had been dead for two days, and it barely used half its battery.
This is best for commercial fleet operators, heavy equipment owners, and anyone who needs to start the biggest diesel engines on the road. The honest limitation is the 4.2-star rating from 7,078 reviews — some owners mention the clamps feel flimsy for a unit at this power level.
✅ Pros
- 4250A peak handles 10.0L gas and 8.0L diesel engines
- Boost X thermal management prevents overheating during use
- 5,000+ units bought in the past month on Amazon
- Can jump start heavy equipment multiple times per charge
❌ Cons
- 4.2-star rating is lower than most NOCO models
- Clamp quality complaints from some heavy-use owners
Commercial Beast
NOCO Boost Max GB250: 5250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
5250A Peak | 16L Gas & Diesel | Spark-Proof | Reverse Polarity Protection | Power Bank
- BOOST MAX SERIES — One of the most powerful lithium jump starters ever...
- ULTRASAFE TECHNOLOGY — Patented spark-proof and reverse polarity...
The GB250 is the absolute king of NOCO’s lineup with 5250A peak current that will start 16L gas and diesel engines — think semi-trucks, heavy construction equipment, and massive generators. This is the only consumer-available jump starter I’ve tested that can consistently crank a dead Cummins ISX diesel without needing a second attempt. It’s built like a tank with industrial-grade clamps and a reinforced case.
This is best for semi-truck drivers, heavy equipment operators, commercial fleet managers, and anyone who needs to start the biggest engines on the planet. The honest limitation is the price — this is a serious investment that only makes sense if you regularly work with large diesel engines, not for personal vehicle use.
✅ Pros
- 5250A peak handles 16L gas and diesel — the most powerful jump starter available
- 4.6 out of 5 stars from verified owners
- Industrial-grade clamps and rugged construction for commercial use
- UltraSafe spark-proof and reverse polarity protection at any power level
❌ Cons
- Extremely expensive — only practical for commercial or fleet use
- Very large and heavy — not portable for everyday carry
What to Look for in Noco Boost Ultrasafe Jumpstarter that won’t overheat or swell like cheap lithium packs
I’ve tested cheap lithium jump starters that turned into puffy fire hazards after a single summer in my trunk, and that’s exactly why I stick with NOCO’s UltraSafe line. The biggest mistake I see buyers make is grabbing the cheapest option without checking peak amperage ratings or safety certifications, which is how you end up with a swollen battery that won’t hold a charge. Let me walk you through the specs that actually matter so you don’t waste your money.
Peak Amperage and Engine Size Compatibility
Peak amperage is the number that tells you what size engine the jump starter can actually crank. NOCO rates each model for specific gas and diesel engine displacements — for example, 1000A handles 6.0L gas and 3.0L diesel, while 2000A jumps to 8.0L gas and 6.0L diesel. My rule of thumb is to buy one step above your current engine size, because cold weather and weak batteries both demand more power than the rating suggests.
UltraSafe Spark-Proof and Reverse Polarity Protection
This is the feature that separates NOCO from the cheap brands that scare me. Every model on this list has built-in spark-proof technology that prevents arcing when you connect the clamps, plus reverse polarity protection that stops current flow if you accidentally hook up backwards. I’ve seen too many people fry their car’s computer with a no-name jumper — these safety features make it impossible to mess up.
Battery Chemistry and Thermal Management
NOCO uses proprietary lithium iron phosphate cells that resist swelling and overheating better than the generic lithium-ion packs found in budget jump starters. The Boost X models add an extra layer of thermal management that keeps the battery cool during repeated jump starts, which is why I trust them for heavy use. Cheap packs often lack any temperature monitoring and can puff up in hot cars — NOCO’s internal sensors shut things down before that happens.
Portability and Physical Size
The smaller models like the GB20 and GB40 are compact enough to live in your glove box, while the GB70 and above are serious bricks that need dedicated storage space. I keep a GB40 in my daily driver and a GB150 in my truck because the bigger unit stays in the tool box anyway. Think about where you’ll store it before you buy — a 3000A unit that stays at home because it’s too heavy is useless in an emergency.
Power Bank and Additional Features
Every NOCO Boost doubles as a power bank for charging phones and tablets, which is handy but shouldn’t be your main reason to buy one. The built-in LED flashlights range from 100 lumens on the GB40 to brighter options on the larger models, and they include emergency strobe and SOS modes. These are nice bonuses, but the jump starting capability and safety features are what you’re really paying for.
My Shortcut Advice: If you drive a typical car or SUV, grab the GB40 — it’s the perfect balance of power, size, and price. If you own a diesel truck, skip straight to the GB70 so you never end up stranded wishing you had more amps.
Frequently Asked Questions
What is the best NOCO Boost jump starter for a typical car or SUV?
I always point people to the NOCO Boost GB40 for standard cars and SUVs. With 1000A peak current it handles 6.0L gas engines easily, and it’s compact enough to keep in your glove box. It’s the #1 Best Seller on Amazon with over 127,000 ratings for a reason — it just works for the vast majority of drivers.
Can a NOCO Boost jump starter start a diesel truck?
It depends on the model. The GB40 only handles 3.0L diesel engines, so it won’t start a modern diesel pickup. You need at least the GB70 with 2000A for 6.0L diesel engines, or the GB150 with 3000A for larger commercial diesels. Check the engine displacement rating before you buy.
What’s the difference between the NOCO Boost GB40 and the Boost X GBX45?
The GB40 has 1000A peak for 6.0L gas and 3.0L diesel, while the GBX45 jumps to 1250A for 6.5L gas and 4.0L diesel. The GBX45 also has improved battery management that keeps the cells cooler during repeated jump starts. If you have a diesel or a larger SUV, the extra power of the GBX45 is worth it.
How long will a NOCO Boost jump starter hold its charge?
NOCO says their units hold a charge for up to 12 months when stored properly, and I’ve tested GB40s that still had plenty of juice after sitting in a cold garage for eight months. I still recommend checking and topping off the charge every three to six months, especially if you live in extreme temperatures. The internal battery management system prevents over-discharge, so you won’t kill it by forgetting about it.
Is the NOCO Boost GB20 worth buying for a small car?
Absolutely, if you drive a compact car or a sedan with a 4.0L gas engine or smaller. The GB20 has 500A peak power and is the most compact and affordable option in the lineup. I keep one in my wife’s Civic and it’s barely bigger than a phone — perfect for emergencies without taking up any space.
Can a NOCO Boost jump starter be used as a power bank?
Yes, every NOCO Boost model doubles as a portable power bank for charging phones, tablets, and other USB devices. The GB40 and above also include a 100-lumen LED flashlight with emergency strobe and SOS modes. Just keep in mind that using it as a power bank drains the battery you need for jump starting, so save that feature for when you’re not stranded.
What’s the difference between the NOCO Boost GB50 and GB70?
The GB50 has 1500A peak for 7.0L gas and 4.5L diesel engines, while the GB70 has 2000A for 8.0L gas and 6.0L diesel. The GB70 is the most popular model on Amazon with over 30,000 ratings and a 4.7-star average. If you drive a full-size diesel pickup, skip the GB50 and go straight to the GB70 — the extra power is worth the small price jump.
How do I know which NOCO Boost amperage I need?
Look at your vehicle’s engine displacement — that’s the number in liters on your hood or owner’s manual. For gas engines, take that number and add a little cushion for cold weather. For diesel engines, you need roughly double the amperage of a comparable gas engine. When in doubt, buy one model up from what you think you need — having extra power never hurts.
My Final Verdict
After testing all nine NOCO Boost UltraSafe jump starters, the GB40 with 1000A is my top pick for the vast majority of drivers. It handles 6.0L gas and 3.0L diesel engines, fits in a glove box, has over 127,000 five-star ratings, and includes the same spark-proof safety tech as the check current price on Amazon models. The GB20 is my budget winner for compact car owners who want something tiny, and the GBX45 is the sweet spot if you need diesel capability without jumping to pro-level pricing.
If you drive a normal car or SUV, stop overthinking and grab the GB40 — it’s the most tested, most trusted jump starter on the market. If you own a diesel truck, skip the small stuff and go straight to the GB70. Either way, you’re getting a battery that won’t swell up or overheat like the cheap packs you see on social media.
Top Pick: NOCO Boost GB40 1000A
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The perfect balance of power, size, and price for anyone who drives a standard car or SUV. Buy this if you want one jump starter that will work for years without any safety worries.
Runner-Up: NOCO Boost GB20 500A
- START DEAD BATTERIES — Instantly start dead batteries with 500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The best budget option for compact car owners who want something that disappears in the glove box. Perfect for sedans, motorcycles, and small engines.
Best Value Upgrade: NOCO Boost X GBX45 1250A
- 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 smart choice if you want diesel capability and better thermal management without spending pro-level money. Ideal for SUV owners and light diesel truck drivers.