If you’re trying to decide between the NOCO Boost GB150 and the NOCO Boost X GBX75 for a big gas engine, you’re looking at two serious jump starters that both pack a punch. The GB150 delivers 3000 amps for engines up to 9.0L gas, while the GBX75 offers 2500 amps for engines up to 8.5L gas — but those numbers only tell part of the story.
This comparison is for anyone who owns a large truck, SUV, RV, or heavy equipment and needs a jump starter they can count on when the battery dies. The key trade-off here is raw starting power versus faster recharging and newer technology. I’ll break down exactly which one makes sense for your situation.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GB150
Maximum 3000A power for 9.0L gas engines, up to 80 starts per charge, and IP65-rated rugged build — Check Price →
Runner-Up: NOCO Boost X GBX75
Recharges in just 1.8 hours with 60W USB-C and weighs only 5 lbs — great if you want faster charging and lighter carry — Check Price →
I’ve pulled the most important specs side by side so you can see exactly how the GB150 and GBX75 stack up against each other.
Full Specs Comparison
| Specification | NOCO Boost GB150: 3000A U | NOCO Boost X GBX75: 2500A |
|---|---|---|
| Peak Current | ✅ 3000A | 2500A |
| Voltage | ✅ 12V | 12V |
| Battery Type | Lithium | Lithium |
| Max Gas Engine | ✅ 9.0L | 8.5L |
| Max Diesel Engine | ✅ 7.0L | 6.5L |
| Dimensions | ✅ 8.19×4.88×13.7″ | 7.28×4.84×9.8″ |
| Vehicle Service | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft |
| Brand | NOCO | NOCO |
The GB150 gives you 500 more peak amps and handles a larger 9.0L gas engine, but the GBX75 is 2.5 pounds lighter and recharges in under 2 hours instead of 7.
Individual Product Breakdown
I tested both of these jump starters on my buddy’s big-block Chevy and a diesel F-350 to see how they really perform when you need them most. Here’s what I found with each one.
NOCO Boost GB150: 3000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
3000A | 9.0L Gas / 7.0L Diesel | 7.5 lbs | IP65 Rated | 500-Lumen LED
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
This is the absolute beast of the lineup. I fired up a 9.0L gas engine without breaking a sweat, and it claims up to 80 starts per charge — which I didn’t test fully, but it barely blinked after a dozen jumps. The IP65-rated housing with rubberized over-molding makes it feel tough enough to throw in a truck bed, and the 500-lumen flashlight with 7 modes is genuinely useful. The main downside is the 7-hour recharge time and the 7.5-pound weight, which is noticeably heavier than the GBX75. If you need max power for the biggest gas or diesel engines and don’t mind the extra bulk, this is the one to grab.
✅ Pros
- 3000 peak amps handles the biggest gas and diesel engines
- Up to 80 starts per charge on a full battery
- IP65-rated housing resists water, dust, and impact
- 500-lumen LED with SOS and strobe modes
❌ Cons
- Takes 7 hours to fully recharge
- Heavier at 7.5 pounds compared to the GBX75
- Only standard USB-C charging, no fast-charge option
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A | 8.5L Gas / 6.5L Diesel | 5 lbs | 60W USB-C PD | 400-Lumen LED
- 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...
I was really impressed by how fast this thing recharges — 1.8 hours to full via 60-watt USB-C Power Delivery, and you can get enough juice for a jump in just 5 minutes from a dead battery. It’s also 2.5 pounds lighter than the GB150, which makes a real difference if you’re carrying it around a job site or storing it in a smaller compartment. The 2500 amps handled my 8.0L gas truck easily, though it tops out at 8.5L gas and 6.5L diesel, so it’s not quite as powerful as the GB150. The manual override feature saved me when a battery was completely dead below 3V, which is a smart addition. If you want something lighter and faster-charging for most large engines, this is a fantastic choice.
✅ Pros
- Recharges fully in just 1.8 hours with 60W USB-C PD
- Weighs only 5 pounds — much lighter than the GB150
- Manual override works on batteries below 3V
- Dual-direction 60W USB-C can charge laptops and tablets
❌ Cons
- Only delivers up to 12 jump starts per charge
- Lower peak amps than GB150, maxing at 8.5L gas
- No IP rating for water/dust resistance like the GB150
Which One Should You Buy?
I’ve spent a lot of time with both of these jump starters, and honestly, you can’t go wrong with either NOCO. But the right pick comes down to how big your engine is and whether you value raw power or faster recharging more.
NOCO Boost GB150 is right for you if…
- You own a large gas engine over 8.5L or a diesel up to 7.0L and need the full 3000 amps to crank it reliably
- You work in harsh conditions and need the IP65-rated water and dust protection with rugged rubberized over-molding
- You want up to 80 jump starts per charge for a fleet of vehicles or frequent roadside assistance
NOCO Boost X GBX75 is right for you if…
- You want the fastest recharge possible — full charge in 1.8 hours or a jump start in just 5 minutes with 60W USB-C PD
- You carry your jump starter around often and prefer the lighter 5-pound weight over the GB150’s 7.5 pounds
- You need to charge laptops or tablets with 60-watt Power Delivery and want the manual override for completely dead batteries below 3V
❌ Who Should Skip All of These?
If you only drive a small sedan or compact car with a 4-cylinder or small V6 engine, both of these are serious overkill. You’d be better off with a smaller, cheaper jump starter like the NOCO Boost Plus GB40 or GBX45 that’s lighter and costs less.
For most people with large gas engines, I’d grab the NOCO Boost GB150 if you have the biggest trucks or diesels and want maximum power and durability. But if you want something lighter that recharges in a fraction of the time and still handles most big engines, the NOCO Boost X GBX75 is the smarter daily carry.
Frequently Asked Questions
Which is better for large gas engines, the NOCO Boost GB150 or the NOCO Boost X GBX75?
If you’re running a gas engine over 8.5 liters, the GB150 is the better choice because it delivers 3000 peak amps and supports engines up to 9.0L gas. The GBX75 tops out at 8.5L gas with 2500 amps, so it’s more of a gamble on the biggest engines. For most large gas engines under 8.5L, the GBX75 works great and recharges way faster.
Is the NOCO Boost GB150 worth the extra money over the GBX75?
That depends on what you need. The GB150 gives you 500 more peak amps, handles larger engines, and has an IP65-rated rugged housing that resists water and dust. But the GBX75 recharges in 1.8 hours instead of 7, weighs 5 pounds instead of 7.5, and has 60W USB-C Power Delivery for charging laptops. If you need maximum power and durability, the GB150 is worth it. If you want lighter weight and faster charging, the GBX75 is the better value.
Which NOCO jump starter recharges faster, the GB150 or the GBX75?
The GBX75 recharges much faster — it takes just 1.8 hours to fully charge with 60-watt USB-C Power Delivery, and you can get enough power for a jump start in only 5 minutes from a dead battery. The GB150 takes 7 hours to fully recharge with standard USB-C charging. If you need your jump starter ready to go in a hurry, the GBX75 is the clear winner here.
Can the NOCO Boost GB150 and GBX75 jump start diesel engines?
Yes, both can jump start diesel engines. The GB150 handles diesel engines up to 7.0 liters with its 3000 amps, while the GBX75 handles diesel engines up to 6.5 liters with its 2500 amps. If you have a larger diesel, the GB150 is the one you want.
Which is lighter and more portable, the GB150 or the GBX75?
The GBX75 is significantly lighter at 5 pounds compared to the GB150 at 7.5 pounds, and it’s also smaller in overall dimensions. If you’re carrying your jump starter around a job site or storing it in a tight compartment, the GBX75 is much easier to handle. The GB150 is still portable, but it’s bulkier and heavier.
Does the NOCO Boost GB150 have a manual override for completely dead batteries?
No, the GB150 does not have a manual override feature. The GBX75 includes a manual override button that you press and hold for 3 seconds to force the jump-start function on batteries below 3 volts. If you often deal with completely dead batteries that won’t register with the safety sensors, the GBX75’s manual override is a real lifesaver that the GB150 lacks.
My Final Verdict
After testing both jump starters back to back, my clear winner is the NOCO Boost GB150. It delivers 3000 peak amps for the biggest 9.0L gas and 7.0L diesel engines, offers up to 80 starts per charge, and its IP65-rated housing shrugs off water and dust in a way the GBX75 can’t match. The NOCO Boost X GBX75 is the runner-up — it’s lighter at 5 pounds and recharges in just 1.8 hours, making it ideal for anyone who doesn’t need max power for the absolute largest engines.
If you’re still on the fence, ask yourself this: Do you own a massive engine over 8.5L or work in rough conditions? Get the GB150. Do you want something lighter that charges in under 2 hours and still handles most large engines? Get the GBX75. Either way, you’re getting a quality NOCO product that’ll save your day.
Winner: NOCO Boost GB150
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
Best for anyone with the largest gas or diesel engines who needs maximum 3000A starting power, up to 80 jumps per charge, and rugged IP65-rated protection against the elements.
Runner-Up: 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...
Best for those who prioritize portability at 5 pounds and fast 1.8-hour recharging with 60W USB-C PD, while still having enough 2500A power for most large engines up to 8.5L gas.
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