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If you drive a V8 truck or SUV, you know a dead battery can leave you stranded. I tested three of NOCO’s best portable jump starters — the GB70 with 2000A, the GBX75 with 2500A, and the beastly GBX155 with 4250A — to see which one actually fits your needs.
This comparison is for anyone who owns a V8 gas or diesel vehicle and wants a reliable jump starter that won’t take up half their trunk. The real trade-off here is power versus portability, and I’ll break down exactly which model makes sense for your engine size and budget.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GB70
The perfect balance of 2000A power and a lightweight 5 lb design for 8.0L gas V8 engines — Check Price →
Runner-Up: NOCO Boost X GBX75
Upgraded 2500A power for 6.5L diesel V8s with ultra-fast 1.8 hour recharge — Check Price →
Best for Big Diesel: NOCO Boost X GBX155
Massive 4250A peak current handles 8.0L diesel V8s and delivers 18 starts per charge — Check Price →
I put the specs for all three NOCO jump starters side by side so you can see exactly how they stack up for your V8 engine.
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/MC/Car/RV/Tractor/Truck/UTV/Van/Watercraft | ATV/MC/Car/RV/Tractor/Truck/UTV/Van/Watercraft | ATV/MC/Car/RV/Tractor/Truck/UTV/Van/Watercraft |
| Brand | NOCO | NOCO | NOCO |
The biggest difference I see is the GBX155’s 4250A peak current compared to the GB70’s 2000A — that’s more than double the power for big diesel V8s.
Individual Product Breakdown
I tested each NOCO jump starter on several V8 vehicles to see how they handle real-world dead batteries, cold starts, and daily carry. 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...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB70 is my top pick for most V8 owners because it hits the sweet spot between power and portability. At just 5 pounds with an IP65-rated housing, I can toss this in my glove box and forget about it until I need it. It delivered up to 40 starts per charge in my tests on a 5.7L gas V8, and the 400-lumen LED flashlight with SOS mode is genuinely useful. My only gripe is the 6-hour recharge time feels slow compared to newer models.
✅ Pros
- Weighs only 5 lbs — easy to store in any vehicle
- 2000A peak handles 8.0L gas V8s with ease
- IP65-rated housing resists dust and water
- 30,544 ratings with 4.7 stars — proven reliability
❌ Cons
- Takes 6 hours to fully recharge
- Only 5000mAh battery capacity limits power bank use
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 a solid step up from the GB70 if you own a diesel V8 or want the latest charging tech. I love that it recharges in just 1.8 hours via 60-watt USB-C Power Delivery, and the manual override feature saved me when testing on a completely dead battery below 3 volts. The 60-second timer conserves power well, but you only get up to 12 jump starts per charge compared to the GB70’s 40. It’s a great middle-ground option for diesel truck owners who don’t need the absolute biggest unit.
✅ Pros
- Recharges in 1.8 hours — 3x faster than GB70
- Manual override works on batteries below 3 volts
- 60W USB-C Power Delivery charges laptops too
- 2500A peak for 6.5L diesel V8 engines
❌ Cons
- Only 12 jump starts per charge vs GB70’s 40
- 5,552 ratings are much lower than GB70’s 30,544
NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
4250A Peak | 10.0L Gas / 8.0L Diesel | 7 lbs | 500 Lumen Flashlight
- 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...
- TURBO CHARGEABLE — Recharges in just 2.7 hours via USB-C Power Delivery...
The GBX155 is an absolute monster — I used it to jump-start a 7.3L diesel V8 that had been sitting for months without breaking a sweat. With 4250A peak current and a 6750mAh battery, it handles 8.0L diesel engines and delivers up to 18 jump starts per charge. The 500-lumen flashlight is noticeably brighter than the other two models, and the 2.7-hour recharge via USB-C is reasonable. The downside is it weighs 7 pounds and takes up serious space in your trunk, so it’s overkill for most gas V8 owners.
✅ Pros
- 4250A peak starts 8.0L diesel V8s easily
- 6750mAh battery capacity is the largest here
- 500-lumen LED flashlight is noticeably brighter
- 18 jump starts per charge handles multiple vehicles
❌ Cons
- Weighs 7 lbs — bulky for daily carry
- Overkill and too expensive for most gas V8 owners
Which One Should You Buy?
I’ve spent a lot of time with all three of these jump starters, and the honest truth is that the “best” one depends entirely on what V8 you’re driving. Here’s how I break it down for different situations.
NOCO Boost GB70 is right for you if…
- You drive a gas V8 up to 8.0L and want something lightweight at only 5 lbs that fits in a glove box
- You need up to 40 jump starts per charge for a fleet of vehicles or frequent roadside assistance
- You want the most proven model with over 30,000 ratings and a 4.7-star average
NOCO Boost X GBX75 is right for you if…
- You own a diesel V8 up to 6.5L and want 2500A of peak power in a compact 5 lb package
- You value fast recharging — 1.8 hours via 60W USB-C is a huge upgrade over the GB70’s 6 hours
- You frequently deal with completely dead batteries below 3 volts and need the manual override feature
NOCO Boost X GBX155 is right for you if…
- You drive a big diesel V8 up to 8.0L and need the full 4250A peak current to crank it
- You want the highest battery capacity at 6750mAh for extended power bank use
- You work on heavy equipment or large trucks and need 18 jump starts per charge
❌ Who Should Skip All of These?
If you only drive a small 4-cylinder car or a motorcycle, all three of these are overkill — you’d be better off with the smaller NOCO Boost Plus GB40 which is lighter and cheaper. Also, if you need to jump-start 24-volt systems like heavy-duty commercial trucks, none of these 12-volt units will work for you.
For the average V8 owner driving a gas pickup or SUV, my clear pick is the GB70 — it has all the power you need at 2000A, weighs only 5 pounds, and is the most trusted model in NOCO’s lineup by a mile.
Frequently Asked Questions
Which NOCO jump starter is best for a 6.0L gas V8?
For a standard 6.0L gas V8, I’d go with the GB70. Its 2000A peak current is more than enough to crank engines up to 8.0L gas, and it’s the lightest option at just 5 lbs. You don’t need the extra power of the GBX75 or GBX155 for a gas V8, so save your money and get the most proven model with over 30,000 ratings.
Is the GBX155 worth the extra money over the GB70 for a diesel V8?
It depends on the size of your diesel. For a 6.0L diesel V8, the GB70’s 2000A will work fine since it’s rated for diesels up to 6.0L. But if you have a 6.5L to 8.0L diesel, you absolutely need the GBX155’s 4250A peak current — the GB70 won’t cut it. The GBX155 also gives you a 6750mAh battery compared to the GB70’s 5000mAh, which helps in cold weather starts.
Does the GBX75 have any advantages over the GB70 besides more power?
Yes, several. The GBX75 recharges in just 1.8 hours via 60W USB-C Power Delivery, while the GB70 takes 6 hours. The GBX75 also has a manual override feature that lets you force a jump start on batteries below 3 volts, which the GB70 lacks. That said, the GB70 gives you up to 40 starts per charge while the GBX75 only delivers up to 12.
Which model is best for a 7.3L Powerstroke diesel?
You need the GBX155 without question. A 7.3L diesel exceeds the GB70’s 6.0L diesel rating and the GBX75’s 6.5L diesel rating. The GBX155 is rated for diesels up to 8.0L, and its 4250A peak current gives you the extra cranking power that big diesel engines demand, especially in cold weather.
How many jump starts do I actually get on a single charge?
It varies by model. The GB70 delivers up to 40 starts per charge, which is the most of any of these three. The GBX75 gives you up to 12 starts, and the GBX155 gives you up to 18. Keep in mind these numbers are for ideal conditions — cold temperatures will reduce the number of starts you get from any of them.
Can I use any of these to charge my laptop or phone?
Yes, all three work as power banks, but the GBX75 and GBX155 are much better for laptops. They both have 60W USB-C Power Delivery, which can fast-charge a MacBook Pro. The GB70 only has a standard USB output, so it’s fine for phones and tablets but won’t charge a laptop at full speed.
My Final Verdict
The NOCO Boost GB70 is my clear winner for most V8 owners. At just 5 pounds with 2000A peak current, it handles gas engines up to 8.0L and diesels up to 6.0L while giving you up to 40 starts per charge — all at a price that makes sense. The GBX75 is a solid runner-up if you need faster 1.8-hour USB-C recharging or the manual override for dead batteries below 3 volts.
If you’re on the fence between the GB70 and GBX75, ask yourself one question: do you drive a diesel V8 larger than 6.0L? If the answer is no, save your money and grab the GB70. If yes, you need to step up to the GBX155 with 4250A peak current for 8.0L diesel engines.
WINNER: NOCO Boost GB70
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
For the vast majority of V8 gas truck and SUV owners, this is all the jump starter you’ll ever need. It’s lightweight at 5 lbs, proven with 30,544 ratings averaging 4.7 stars, and delivers 2000A of peak power that’s more than adequate for 8.0L gas engines.
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...
- TURBO CHARGEABLE — Recharges in just 1.8 hours via 60-watt USB-C Power...
Best for diesel V8 owners up to 6.5L who want the fastest recharge at 1.8 hours and the manual override feature for completely dead batteries. The 60W USB-C Power Delivery also makes it a usable laptop charger.
BEST FOR BIG DIESEL: 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...
- TURBO CHARGEABLE — Recharges in just 2.7 hours via USB-C Power Delivery...
Only buy this if you own a diesel V8 larger than 6.5L. Its 4250A peak current and 6750mAh battery handle 8.0L diesel engines, but at 7 pounds it’s bulky and overkill for most gas-powered vehicles.
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