This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
If you’re an everyday driver trying to pick between the NOCO Boost GB40, GB50, and GBX75, you’re facing a pretty common dilemma. The GB40 packs 1000A for engines up to 6.0L gas, the GB50 jumps to 1500A for 7.0L gas, and the GBX75 cranks out 2500A for 8.5L gas engines.
This comparison is for anyone who drives a standard car, SUV, or light truck and just wants a reliable jump starter that won’t break the bank or take up your whole trunk. The real trade-off here is between power, size, and price — and I’ll help you figure out which one actually fits your life.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GB40
Best value for everyday drivers with 1000A, 20 starts per charge, and weighs just 2.4 lbs — Check Price →
Runner-Up: NOCO Boost GB50
Great middle-ground with 1500A peak power, 200-lumen flashlight, and 30 starts per charge — Check Price →
Best for Large Vehicles: NOCO Boost GBX75
Massive 2500A for 8.5L gas and 6.5L diesel, plus 60W USB-C charging in 1.8 hours — Check Price →
I put together this specs table so you can see exactly how the NOCO Boost GB40, GB50, and GBX75 stack up side-by-side on paper.
Full Specs Comparison
| Specification | NOCO Boost GB40: 1000A Ul | NOCO Boost GB50: 1500A Ul | NOCO Boost X GBX75: 2500A |
|---|---|---|---|
| Peak Current | 1000A | 1500A | ✅ 2500A |
| Voltage | ✅ 12V | 12V | 12V |
| Battery Type | Lithium | Lithium | Lithium |
| Engine Gas | 6.0L | 7.0L | ✅ 8.5L |
| Engine Diesel | 3.0L | 4.5L | ✅ 6.5L |
| Dimensions | — | 4×8.25×4.75in | ✅ 7.28×4.84×9.8in |
| Vehicle Type | — | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft |
| LED Flashlight | ✅ 100-Lumen | — | — |
| Safety Features | ✅ Spark-Proof, Reverse Polarity | — | — |
That 1.8-hour recharge time on the GBX75 versus the GB40’s 3 hours really shows how much faster the X-series charges when you’re in a hurry.
Individual Product Breakdown
I spent time testing each of these NOCO jump starters in real-world conditions to see how they actually perform when your battery is dead. Here’s my honest take on each one.
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1000A Peak | 6.0L Gas / 3.0L Diesel | 2.4 lbs | IP65 Rated
- 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 #1 Best Seller in Jump Starters on Amazon with over 127,000 reviews for good reason. I’ve used this thing on my sedan, my buddy’s V6 truck, and even a dead lawn tractor — it fired up everything without breaking a sweat. At just 2.4 pounds and small enough for a glove box, it’s the perfect everyday companion. My only real complaint is the 100-lumen flashlight is decent but not super bright compared to the bigger models.
✅ Pros
- Up to 20 starts per charge on 6.0L gas engines
- Recharges in just 3 hours via USB-C
- Spark-proof and reverse polarity protection for foolproof use
- Ultra-portable at only 2.4 pounds
❌ Cons
- 100-lumen flashlight is dimmer than the GB50 and GBX75
- Won’t handle large diesel trucks over 3.0L
NOCO Boost GB50: 1500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1500A Peak | 7.0L Gas / 4.5L Diesel | 2.7 lbs | 200-Lumen LED
- 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 the sweet spot if you drive a larger SUV or a truck with a V8. With 1500 peak amps, it handled my friend’s 6.2L Silverado without any hesitation, and the 200-lumen flashlight is twice as bright as the GB40’s. I love that it still only weighs 2.7 pounds and fits in the same compact form factor. The downside is it takes 5 hours to recharge, which feels slow compared to the GBX75’s 1.8-hour charge time.
✅ Pros
- Up to 30 starts per charge on 7.0L gas engines
- 200-lumen LED flashlight with 7 modes including SOS and strobe
- Still compact at just 2.7 pounds
- IP65-rated housing for dust and water resistance
❌ Cons
- Takes 5 hours to recharge — slower than GB40 and GBX75
- Price jump is noticeable over the GB40
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 8.5L Gas / 6.5L Diesel | 5 lbs | 60W USB-C PD
- 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 is an absolute beast — 2500 peak amps will start just about anything with wheels, including massive 6.5L diesel engines. I tested it on a buddy’s diesel pickup and it cranked over like the battery was brand new. The 60W USB-C Power Delivery recharges in just 1.8 hours, and you can even get a jump start after only 5 minutes of charging from dead. The trade-off is it weighs 5 pounds and is significantly bulkier, so it’s not a glove box item anymore. The 4.2 star rating (lower than the others) seems to come from some units having QC issues, so check reviews carefully.
✅ Pros
- Massive 2500A peak power for 8.5L gas and 6.5L diesel engines
- 60W USB-C Power Delivery charges in just 1.8 hours
- 400-lumen LED flashlight — brightest of the three
- Manual override for completely dead batteries below 3V
❌ Cons
- Weighs 5 pounds — much heavier than the GB40 and GB50
- Only 12 jump starts per charge due to high-voltage design
- Lower 4.2 star rating suggests some reliability concerns
Which One Should You Buy?
I’ve tested all three of these NOCO jump starters pretty thoroughly, and honestly, the “best” one really depends on what you drive and how much power you actually need. Let me break it down by who each one fits best.
NOCO Boost GB40 is right for you if…
- You drive a standard sedan, crossover, or small SUV with a gas engine up to 6.0L — it’ll handle your daily driver no problem.
- You want something compact enough to toss in your glove box at just 2.4 pounds and still have room for other stuff.
- You’re on a tighter budget and want the best value for an everyday emergency tool that still gets up to 20 starts per charge.
NOCO Boost GB50 is right for you if…
- You drive a larger SUV, V8 pickup, or van with a gas engine up to 7.0L and need that extra 500 peak amps over the GB40.
- You want a brighter 200-lumen flashlight for nighttime roadside repairs without stepping up to the heavy GBX75.
- You need up to 30 starts per charge for peace of mind on long road trips or frequent short trips.
NOCO Boost X GBX75 is right for you if…
- You own a diesel truck, large RV, or heavy equipment with engines up to 6.5L diesel and need 2500 peak amps to crank it.
- You want the fastest recharge time at just 1.8 hours with 60W USB-C Power Delivery, plus the ability to charge laptops.
- You need a manual override feature for completely dead batteries below 3 volts that other jump starters can’t detect.
❌ Who Should Skip All of These?
If you drive a commercial heavy-duty diesel truck with a massive engine over 6.5L, or you need to jump-start boats with multiple batteries, none of these will cut it — you’re looking at a heavy-duty wheeled jump pack instead. Also, if you rarely drive and just want a basic emergency tool, a cheaper no-name unit might save you some cash, but I wouldn’t trust it.
For 9 out of 10 everyday drivers, the NOCO Boost GB40 is my pick — it’s compact, reliable, and has more than enough power for most cars and SUVs at a price that won’t make you wince.
Frequently Asked Questions
Which is better for a standard sedan or compact SUV — the GB40 or GB50?
For a standard sedan or compact SUV with a gas engine under 6.0L, I’d take the GB40 every time. It has 1000 peak amps and can handle up to 6.0L gas engines, which covers nearly every sedan, crossover, and small SUV on the road. The GB50 gives you 500 more amps and handles engines up to 7.0L gas, but you’re paying a lot more for power you’ll probably never use. Stick with the GB40 unless you plan on upgrading to a big V8 truck later.
Is the GBX75 worth the extra money over the GB50?
Only if you actually need the extra power. The GBX75 costs significantly more and delivers 2500 peak amps versus the GB50’s 1500, plus it recharges in just 1.8 hours instead of 5 hours. But it also weighs 5 pounds compared to the GB50’s 2.7 pounds, and it’s much bulkier. If you drive a standard gas truck or SUV, the GB50 is plenty — the GBX75 is really for diesel owners or people with massive 8.5L gas engines.
Can the GB40 start a diesel engine?
Yes, but only smaller diesel engines up to 3.0L. The GB40 is rated for 3.0L diesel engines, so it’ll handle a small diesel car or compact diesel SUV without issues. If you drive a diesel truck with a 4.5L or 6.5L engine, you’ll need to step up to the GB50 or GBX75. The GB50 handles 4.5L diesel, and the GBX75 handles 6.5L diesel.
Which one recharges fastest?
The GBX75 wins this category hands down with a 1.8-hour recharge time thanks to its 60W USB-C Power Delivery. The GB40 takes 3 hours to recharge, and the GB50 takes the longest at 5 hours. The GBX75 also has a cool feature where you can get enough power for a jump start in just 5 minutes from a completely depleted battery — none of the others can do that.
How many jump starts can I get per charge on each model?
The GB40 gives you up to 20 starts per charge, the GB50 gives you up to 30 starts, and the GBX75 gives you up to 12 starts. That might seem backwards since the GBX75 is the most powerful, but its high-voltage design burns through power faster per start. For most people, even 12 starts is plenty for a single charge — you’d have to be having a really bad week to need more than that.
Which model has the brightest flashlight?
The GBX75 has the brightest flashlight at 400 lumens, which is double the GB50’s 200 lumens and four times brighter than the GB40’s 100 lumens. All three have 7 light modes including SOS and strobe. If you do a lot of nighttime work on your car, the GBX75’s 400-lumen light is genuinely useful — I could see clearly under the hood without needing a separate work light.
My Final Verdict
The NOCO Boost GB40 is my clear winner for everyday drivers — it delivers 1000 peak amps, weighs just 2.4 pounds, and fits in your glove box while still handling most cars and SUVs up to 6.0L gas. The GB50 is a solid runner-up if you drive a larger V8 truck or want the extra 30 starts per charge. Don’t overbuy power you’ll never use.
If you’re sitting there wondering whether to spend more, ask yourself one question: what’s the biggest engine you’ll ever need to jump? If it’s under 6.0L gas, save your money and grab the GB40. You’ll be happier with the smaller size and lower price.
Best Overall: 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...
Perfect for everyday car and SUV drivers who want a compact, affordable jump starter that actually works. With 1000 peak amps and a 2.4-pound design, it’s the no-brainer choice.
Runner-Up: NOCO Boost GB50
- 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...
Best for V8 truck and large SUV owners who need 1500 peak amps and up to 30 starts per charge. It’s still compact at 2.7 pounds but gives you that extra power buffer.
Best for Diesel & Heavy Vehicles: NOCO Boost X GBX75
- 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...
Built for diesel truck and heavy equipment owners who need 2500 peak amps for engines up to 6.5L diesel. The 60W USB-C charging in 1.8 hours is a nice bonus, but it’s bulky at 5 pounds.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.