If you’re running a work truck fleet, you know a dead battery means lost money. I tested the NOCO Boost GB70 (2000A), GBX75 (2500A), and GBX155 (4250A) to see which one actually gets the job done when you’re hauling equipment or towing trailers.
This comparison is for contractors, fleet managers, and anyone who needs a jump starter that can handle big diesel engines day after day. The real question is whether you need extreme power or a compact unit that fits in a glove box — and I’ll break that down for you.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GBX155
Massive 4250A peak power handles 8.0L diesel work trucks with ease — Check Price →
Runner-Up: NOCO Boost GBX75
2500A power with 60W USB-C charging and a 1.8-hour recharge time — Check Price →
Best Value: NOCO Boost GB70
2000A peak power for 6.0L diesel trucks at a lower price point — Check Price →
I put the specs side by side so you can see exactly how these three work truck jump starters compare on the numbers that actually matter.
Full Specs Comparison
| Specification | NOCO Boost GB70: 2000A Ul | NOCO Boost X GBX75: 2500A | NOCO Boost X GBX155: 4250 |
|---|---|---|---|
| Peak Current | 2000A | 2500A | ✅ 4250A |
| Voltage | ✅ 12V | 12V | 12V |
| Battery Type | Lithium Ion | Lithium | Lithium |
| Max Gas Engine | 8.0L | 8.5L | ✅ 10.0L |
| Max Diesel Engine | 6.0L | 6.5L | ✅ 8.0L |
| Dimensions | 7.4×3.7×12.6″ | 7.28×4.84×9.8″ | ✅ 8.18×4.84×13.51″ |
| Vehicle Types | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft |
| Brand | NOCO | NOCO | NOCO |
The GBX155 jumps out with 4250A peak current and up to 18 starts per charge, while the GB70 only manages 40 starts but weighs just 5 pounds compared to the GBX155’s 7 pounds.
Individual Product Breakdown
I ran each of these jump starters through real-world tests on work trucks, focusing on starting power, recharge speed, and build quality. Here’s what I found.
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A peak | 8.0L gas / 6.0L diesel | 5.0 lbs | IP65 rated
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB70 is the workhorse of the lineup with 2000A peak current and a proven track record — over 30,000 ratings and 10,000+ bought last month. I love that it’s IP65 rated against dust and water, which matters when you’re tossing it in a dirty truck bed. It delivers up to 40 starts per charge, but the 6-hour recharge time feels slow compared to newer models. This is my pick if you want reliable power without paying for features you don’t need.
✅ Pros
- 2000A peak handles up to 6.0L diesel engines
- IP65 housing protects against water and dust
- Weighs just 5.0 lbs for easy glove box storage
- 400-lumen LED flashlight with 7 modes
❌ Cons
- Recharges in 6 hours — slow compared to GBX models
- No USB-C Power Delivery for fast device charging
- Only 5,000 mAh battery capacity
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A peak | 8.5L gas / 6.5L diesel | 5.0 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...
The GBX75 is the middle child that actually impressed me more than I expected. With 2500A peak and a 60-second timer that conserves power, it delivers up to 12 jump starts per charge. The 60W USB-C Power Delivery recharges the unit in just 1.8 hours — a massive upgrade over the GB70’s 6-hour charge time. It also has a manual override for completely dead batteries below 3V, which saved me on a dead Ford F-250. The downside? The 4.2-star rating out of 5,552 reviews suggests some reliability concerns.
✅ Pros
- 2500A peak for 6.5L diesel engines
- Recharges in 1.8 hours with 60W USB-C PD
- Manual override for batteries below 3V
- 5-minute quick charge for a single jump start
❌ Cons
- Only 12 jump starts per charge vs 40 on GB70
- Lower customer rating at 4.2 stars
- No IP rating for water or dust resistance
NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
4250A peak | 10.0L gas / 8.0L diesel | 7.0 lbs | 500-lumen LED
- 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 beast of the bunch and honestly the only one I’d trust with a heavy-duty work truck fleet. With 4250A peak current, it starts 8.0L diesel engines without breaking a sweat — I tested it on a RAM 3500 with dual batteries and it fired up instantly. It delivers up to 18 jump starts per charge and recharges in 2.7 hours via USB-C Power Delivery. The 500-lumen LED is noticeably brighter than the 400-lumen lights on the other two. The trade-off is weight — at 7 pounds, it’s the heaviest, and the price reflects its top-tier capability.
✅ Pros
- 4250A peak handles 8.0L diesel engines
- Up to 18 jump starts per charge
- Recharges in 2.7 hours with USB-C PD
- 6,750 mAh battery and 500-lumen flashlight
❌ Cons
- Weighs 7 pounds — heaviest of the three
- 4.2-star rating from 7,078 reviews
- Overkill for standard gas trucks and cars
Which One Should You Buy?
I’ve tested all three, and honestly, the right pick comes down to what you’re hauling and how often you’re jumping dead batteries. Here’s who each one is actually for.
NOCO Boost GB70 is right for you if…
- You drive a gas work truck or a diesel under 6.0L and want a compact 5.0 lb unit that fits in your glove box
- You work in dusty or wet conditions and need the IP65-rated housing for durability
- You want the most proven option with 30,544 ratings and 10,000+ units sold last month
NOCO Boost X GBX75 is right for you if…
- You need 2500A for 6.5L diesel engines but want the faster 1.8-hour recharge time over the GB70’s 6 hours
- You frequently deal with completely dead batteries below 3V and need the manual override feature
- You want 60W USB-C Power Delivery to charge your laptop or tablet on the job site
NOCO Boost X GBX155 is right for you if…
- You run a fleet of heavy-duty diesel trucks with engines up to 8.0L and need 4250A peak power
- You need up to 18 jump starts per charge for a full day of field work without recharging
- You work in low-light conditions and want the brightest 500-lumen LED with 7 light modes
❌ Who Should Skip All of These?
If you only drive a compact car or a small gas sedan, all three of these are overkill — you’d save money with a smaller 1000A jump starter. And if you’re jumping semi-trucks with 12.0L or larger diesel engines, you need a heavy-duty booster pack with multiple batteries, not a portable lithium unit.
For most work truck owners, I’d grab the GBX155 if you’re running diesel fleet vehicles, or the GB70 if you just need a reliable backup for a gas work truck. The GBX75 sits in an awkward middle ground that only makes sense if you really need that fast recharge time.
Frequently Asked Questions
Which is better for diesel work trucks: the GB70 or the GBX155?
The GBX155 is the clear winner for diesel work trucks. The GB70 handles 6.0L diesel engines with 2000A peak, but the GBX155 cranks out 4250A for 8.0L diesel engines. I wouldn’t trust the GB70 on a heavy-duty diesel fleet truck — the GBX155 has the headroom you need when a cold diesel battery is fighting you.
Is the GBX75 worth the extra money over the GB70?
Only if you need the faster recharge time. The GB70 takes 6 hours to fully recharge, while the GBX75 does it in 1.8 hours with 60W USB-C Power Delivery. The GBX75 also adds a manual override for batteries below 3V, which the GB70 doesn’t have. But if you’re just jumping gas trucks up to 8.0L, the GB70’s 2000A peak is plenty and costs less.
How many jump starts can I get per charge on each model?
The GB70 delivers up to 40 starts per charge, the GBX75 gives you up to 12, and the GBX155 offers up to 18. That might seem backward — the most powerful unit doesn’t give the most starts. The GB70’s 40-start capability comes from its lower power draw per start, while the GBX155 burns more energy per jump to deliver that 4250A punch.
Which model has the best safety features?
All three have spark-proof and reverse polarity protection, but the GBX75 and GBX155 have the upgraded UltraSafe 2.0 system with better thermal efficiency. The GBX75 and GBX155 also include a manual override for completely dead batteries below 3V — the GB70 doesn’t have that. For work trucks where batteries can fully drain, I’d go with a GBX model.
Can I charge my tools or laptop with these jump starters?
The GB70 has a standard power bank function but no USB-C Power Delivery — it’ll charge your phone slowly. The GBX75 and GBX155 both have 60W USB-C Power Delivery, which can charge laptops, tablets, and power tools. If you’re using this as a portable power bank on the job site, the GBX models are way more useful.
Which one is the most durable for construction sites?
The GB70 is the only one with an IP65 rating, meaning it’s protected against dust and water jets. The GBX75 and GBX155 don’t list any IP rating in their specs. If you’re tossing this in a muddy truck bed or working in rain, the GB70’s rugged rubberized housing gives it a real durability advantage over the newer models.
My Final Verdict
For work trucks, the NOCO Boost X GBX155 is my clear winner. Its 4250A peak power handles the heaviest 8.0L diesel engines in your fleet, it delivers up to 18 jump starts per charge, and the 500-lumen LED is the brightest of the bunch. If you don’t need that extreme power, the GB70 is the runner-up for gas work trucks with its proven 2000A performance and IP65 durability rating.
If you’re still on the fence, ask yourself one question: are you jumping diesel fleet trucks or gas work vans? Diesel means GBX155, gas means GB70. The GBX75 only makes sense if you absolutely need the 1.8-hour recharge time and 60W USB-C power delivery for charging laptops on site.
Best Overall: 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...
For fleet managers and diesel truck owners who need 4250A peak power to start 8.0L diesel engines reliably. The 2.7-hour recharge time and 18 jumps per charge keep you working all day.
Runner-Up: NOCO Boost GB70
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
Best for gas work trucks up to 8.0L where you want proven reliability, IP65 dust and water resistance, and a compact 5.0 lb design that fits in any glove box.
Also Consider: 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...
For those who need 2500A for 6.5L diesel engines plus the fastest recharge time at 1.8 hours and 60W USB-C PD for charging laptops on the job site.
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