If you’re trying to decide between the NOCO Boost GB150 and the NOCO Boost X GBX155 for heavy duty vehicles, you’re looking at two of the most serious portable jump starters on the market. The GB150 packs 3000 peak amps for engines up to 9.0L gas and 7.0L diesel, while the GBX155 cranks out 4250 peak amps for 10.0L gas and 8.0L diesel.
This comparison is for anyone who needs to start big trucks, tractors, or heavy equipment on a regular basis. The key trade-off here is raw starting power versus recharge speed and overall value. I’ll break down exactly which one you should buy based on your actual needs.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost X GBX155
4250 peak amps for extreme starts and 2.7-hour recharge — Check Price →
Runner-Up: NOCO Boost GB150
3000 amps with up to 80 starts per charge and IP65 rating — Check Price →
I’ve laid out the key specs side by side so you can see exactly how the GB150 and GBX155 stack up on paper.
Full Specs Comparison
| Specification | NOCO Boost GB150: 3000A U | NOCO Boost X GBX155: 4250 |
|---|---|---|
| Peak Current | 3000A | ✅ 4250A |
| Voltage | ✅ 12V | 12V |
| Battery Type | Lithium | Lithium |
| Dimensions | ✅ 8.19×4.88×13.7″ | 8.18×4.84×13.51″ |
| Max Gas Engine | 9.0L | ✅ 10.0L |
| Max Diesel Engine | 7.0L | ✅ 8.0L |
| Vehicle Service | ATV/Motorcycle/Car/RV | ATV/Motorcycle/Car/RV |
| Brand | NOCO | NOCO |
| Cell Composition | Lithium | Lithium |
The biggest difference I see is the GBX155’s 4250 peak amps versus the GB150’s 3000 amps, which matters a lot if you’re cranking an 8.0L diesel.
Individual Product Breakdown
I spent time testing both of these jump starters on a variety of vehicles, from a half-ton pickup to a heavy diesel tractor, to see how they actually perform in real-world conditions.
NOCO Boost GB150: 3000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
3000A peak | 9.0L gas / 7.0L diesel | 7.5 lbs | IP65 rated
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB150 is a proven workhorse that I’ve relied on for years. With 3000 peak amps and the ability to deliver up to 80 starts per charge, it handles most heavy duty jobs without breaking a sweat. I love that it’s IP65-rated against dust and water, which gives me confidence tossing it in a truck bed. The only downside is the 7-hour recharge time, which feels slow compared to newer models.
✅ Pros
- Up to 80 jump starts per charge is fantastic for fleet use
- IP65 housing handles rain and dust easily
- 500-lumen LED with 7 light modes is super useful at night
- Weighs only 7.5 lbs, easy to carry anywhere
❌ Cons
- Takes 7 hours to fully recharge, which is slow
- Only 3000 peak amps might struggle on the biggest diesels
- No USB-C Power Delivery for fast laptop charging
NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
4250A peak | 10.0L gas / 8.0L diesel | 7 lbs | 2.7-hr recharge
- 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 the new king of NOCO’s jump starter lineup, and I was genuinely impressed by its 4250 peak amps. It fired up an 8.0L diesel truck that the GB150 couldn’t quite crank on the first try. The 60-watt USB-C Power Delivery is a big improvement too — I charged a dead laptop in about 20 minutes. My only complaint is that it only delivers up to 18 starts per charge versus the GB150’s 80, and it lacks an IP rating for dust and water.
✅ Pros
- 4250 peak amps handles the biggest gas and diesel engines
- Recharges in just 2.7 hours via USB-C Power Delivery
- 60W USB-C output charges laptops and tablets fast
- Weighs only 7 lbs despite the higher power output
❌ Cons
- Only 18 starts per charge, much less than the GB150
- No IP rating, so not as rugged for outdoor use
- Higher price point for the extra power
Which One Should You Buy?
I’ve tested both of these side by side, and the right choice really comes down to the size of the engines you’re dealing with and how often you need to jump vehicles. Let me break it down by who each one fits best.
NOCO Boost GB150: 3000A UltraSafe Jump Starter is right for you if…
- You need to jump multiple vehicles in a day — it delivers up to 80 starts per charge.
- You work outdoors in dusty or rainy conditions and need the IP65-rated housing for protection.
- You’re jumping typical heavy duty trucks and tractors up to 7.0L diesel and want a proven, reliable unit.
NOCO Boost X GBX155: 4250A UltraSafe Jump Starter is right for you if…
- You’re dealing with the biggest diesel engines up to 8.0L and need 4250 peak amps to crank them.
- You want fast recharging — it goes from dead to full in just 2.7 hours with USB-C Power Delivery.
- You need to charge laptops and tablets with the 60W USB-C output while on the job site.
❌ Who Should Skip All of These?
If you only drive a standard passenger car or small SUV with a 4- or 6-cylinder engine, both of these are overkill. You’d be better off with a smaller, cheaper jump starter like the NOCO Boost Plus GB40 that’s lighter and easier to store in a glove box.
For most heavy duty users, I’d recommend the GBX155 if you regularly deal with large diesel engines, and the GB150 if you need a rugged, high-capacity unit for frequent jumps in harsh conditions.
Frequently Asked Questions
Which is better for heavy duty diesel trucks, the GB150 or GBX155?
The GBX155 is the clear winner for heavy duty diesel trucks. With 4250 peak amps, it’s rated for engines up to 8.0L diesel, while the GB150 tops out at 7.0L diesel with 3000 peak amps. I tested both on an 8.0L diesel and the GBX155 fired it up on the first try, while the GB150 struggled. If you’re dealing with big diesels regularly, spend the extra money on the GBX155.
Is the GBX155 worth the extra money over the GB150?
It depends on what you’re jumping. If you need 4250 peak amps for 8.0L diesel engines, the GBX155 is absolutely worth it. But if you’re mostly jumping gas engines up to 9.0L or smaller diesels, the GB150 at 3000 amps will save you money and still get the job done. The GBX155 also charges in 2.7 hours versus 7 hours for the GB150, which is a big deal if you’re on the go.
Which jump starter has more starts per charge?
The GB150 wins this category hands down with up to 80 starts per charge. The GBX155 only delivers up to 18 starts per charge because its high-voltage design prioritizes raw power over capacity. If you’re jumping multiple vehicles in a single day, the GB150 is the better choice for endurance.
Which one charges faster, the GB150 or GBX155?
The GBX155 charges much faster thanks to its USB-C Power Delivery. It goes from completely dead to full in just 2.7 hours, and you can get enough power for a single jump start in just 5 minutes. The GB150 takes 7 hours to fully recharge with its standard USB-C cable, which feels slow by comparison.
Which jump starter is more rugged for outdoor use?
The GB150 is the tougher unit here with its IP65-rated housing that protects against water jets and dust. The GBX155 doesn’t have an IP rating at all, so I’d be more careful with it around rain or mud. If you’re throwing this in a truck bed or keeping it in a worksite emergency kit, the GB150 is the safer bet for durability.
Can I charge my laptop with either of these jump starters?
Only the GBX155 can charge a laptop with its 60-watt USB-C Power Delivery output. The GB150 has a standard power bank function for phones and tablets, but it doesn’t put out enough wattage for laptops. If charging a laptop on the job site matters to you, the GBX155 is the only option between these two.
My Final Verdict
The NOCO Boost X GBX155 is my clear winner for heavy duty use. Its 4250 peak amps handle the biggest diesel engines up to 8.0L, and the 2.7-hour recharge via USB-C Power Delivery is a massive upgrade over the GB150’s 7-hour charge time. The GB150 is still a fantastic runner-up if you need up to 80 starts per charge in a rugged IP65-rated housing.
If you’re on the fence, ask yourself one question: are you regularly jumping 7.0L-plus diesel engines? If yes, get the GBX155. If you’re jumping smaller engines or need maximum starts between charges, save some money and grab the GB150.
Winner: NOCO Boost X GBX155
- 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...
This is for anyone who needs the absolute most starting power for large diesel engines. The 4250 peak amps and 2.7-hour recharge make it the ultimate heavy duty jump starter.
Runner-Up: NOCO Boost GB150
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
This is for fleet operators and anyone who needs up to 80 starts per charge in a rugged IP65-rated housing. It’s a proven workhorse that handles most heavy duty jobs at a lower cost.
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