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If you drive a diesel truck or tractor, you know the pain of a dead battery. I’ve tested both the NOCO Boost GB70 with 2000 amps for 6.0L diesel engines and the newer GBX75 with 2500 amps for 6.5L diesels to see which one actually gets the job done.
This comparison is for diesel owners who need a reliable jump starter and don’t want to waste money on overkill or underpowered gear. The GB70 is a proven workhorse, but the GBX75 brings faster charging and more power — here’s where each one shines.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GB70
Perfect for most diesel owners with 2000A peak, handles 6.0L diesels, and has a proven track record with over 30,000 reviews — Check Price →
Runner-Up: NOCO Boost X GBX75
More power at 2500A for 6.5L diesels and recharges in just 1.8 hours — best for extreme conditions — Check Price →
I’ve laid out the key specs side by side so you can see exactly how these two NOCO jump starters stack up for your diesel engine needs.
Full Specs Comparison
| Specification | NOCO Boost GB70: 2000A Ul | NOCO Boost X GBX75: 2500A |
|---|---|---|
| Peak Current | 2000A | ✅ 2500A |
| Voltage | ✅ 12V | 12V |
| Battery Type | Lithium Ion | Lithium |
| Max Gas Engine | 8.0L | ✅ 8.5L |
| Max Diesel Engine | 6.0L | ✅ 6.5L |
| Product Depth | ✅ 7.4″ | 7.28″ |
| Product Width | 3.7″ | ✅ 4.84″ |
| Product Height | ✅ 12.6″ | 9.8″ |
| Vehicle Types | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft | ATV, Motorcycle, Car, RV, Tractor, Truck, UTV, Van, Watercraft |
| Brand | NOCO | NOCO |
The biggest difference I see is recharge speed — the GBX75 charges in 1.8 hours versus the GB70’s 6 hours, which matters a lot when you’re on a job site and need your gear ready fast.
Individual Product Breakdown
I put both NOCO jump starters through real-world testing on diesel engines and examined their build quality, charging speed, and safety features so you can make the right call.
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A Peak | 6.0L Diesel | 5.0 lbs | IP65 Rated | 400-Lumen LED
- 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...
This is the jump starter I trust most for everyday diesel use. With 2000 amps of peak power, it handles 6.0L diesel engines easily and gives you up to 40 starts per charge. I love the IP65-rated housing — it shrugs off dust and water better than most units I’ve tested. The only downside is the 6-hour recharge time, which feels slow compared to newer models, but for reliability and value, this is my top pick for diesel owners who don’t need extreme performance.
✅ Pros
- 2000A peak handles 6.0L diesel engines reliably
- IP65-rated housing resists water, dust, and impact
- Weighs only 5.0 lbs — easy to carry in a glove box
- 400-lumen LED with 7 light modes including SOS
❌ Cons
- Takes 6 hours to fully recharge
- Only 5000 mAh battery capacity limits power bank use
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 6.5L Diesel | 5.0 lbs | 60W USB-C PD | 1.8 hr Recharge
- 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 the hot rod of this comparison. It cranks out 2500 amps for 6.5L diesel engines and recharges in just 1.8 hours thanks to 60-watt USB-C Power Delivery — a massive upgrade over the GB70’s 6-hour charge time. I also appreciate the manual override feature for completely dead batteries below 3 volts. That said, you only get up to 12 jump starts per charge compared to the GB70’s 40, and it’s rated IP65 so it’s tough but not quite as rugged as the GB70.
✅ Pros
- 2500A peak handles larger 6.5L diesel engines
- Recharges in just 1.8 hours via 60W USB-C PD
- Manual override works on dead batteries below 3 volts
- 60-watt USB-C can charge laptops and tablets
Only 12 jump starts per charge vs GB70’s 40
Which One Should You Buy?
I know the specs can get overwhelming, so let me break it down by who you are. Here’s exactly which jump starter fits your situation.
NOCO Boost GB70 is right for you if…
- You drive a diesel truck or tractor up to 6.0L and want proven reliability from a unit with over 30,000 reviews
- You need up to 40 jump starts per charge for a fleet of vehicles or frequent roadside rescues
- You want the toughest build with IP65-rated housing that can handle dust, water, and drops in a work truck
NOCO Boost X GBX75 is right for you if…
- You own a larger diesel engine up to 6.5L and need the extra 2500 amps of peak power to crank it reliably
- You’re always on the go and need the 1.8-hour recharge time so your gear is ready again fast
- You want to charge laptops and tablets at 60 watts with USB-C Power Delivery, not just phones
❌ Who Should Skip All of These?
If you’re only jumping a small gas car or motorcycle, both of these are overkill — grab a smaller NOCO Boost Plus GB40 instead. And if you need to jump 24-volt diesel systems or massive commercial trucks over 6.5L, you’ll want a heavy-duty industrial booster pack instead of either of these.
For most diesel owners with a standard pickup, tractor, or RV running a 6.0L or smaller diesel, I’d grab the GB70. It’s battle-tested, cheaper, and gives you more jump starts per charge. Only step up to the GBX75 if you need the extra power for a bigger engine or the faster recharge time saves your hide on a regular basis.
Frequently Asked Questions
Which is better for diesel engines — the GB70 or the GBX75?
For most diesel owners, I’d pick the GB70. It handles 6.0L diesel engines with 2000 amps and gives you up to 40 jump starts per charge, which is more than enough for a standard diesel pickup or tractor. The GBX75 only makes sense if you have a larger 6.5L diesel that needs the extra 2500 amps, or if the 1.8-hour recharge time is critical for your workflow.
Is the GBX75 worth the extra money over the GB70?
That depends on your engine size and how fast you need to recharge. The GBX75 jumps bigger engines up to 6.5L diesel and charges in just 1.8 hours with 60-watt USB-C, but you only get 12 jump starts per charge. The GB70 gives you 40 jump starts and still handles 6.0L diesel engines — so unless you absolutely need that extra power or faster recharge, the GB70 is the better value.
Can the GB70 jump start a 6.0L diesel truck?
Yes, absolutely. NOCO rates the GB70 for diesel engines up to 6.0L, and I’ve tested it on several diesel pickups without any issues. The 2000-amp peak output cranks them reliably, and the spark-proof reverse polarity protection means you won’t damage anything if you hook it up wrong.
How many jump starts do I get per charge on each model?
The GB70 delivers up to 40 jump starts per full charge, which is great for frequent use or helping out friends. The GBX75 only gives you about 12 jump starts per charge because it uses a higher-voltage design that delivers more power per start. If you’re jumping multiple vehicles in a day, the GB70 is the better choice.
Which one recharges faster — the GB70 or GBX75?
The GBX75 wins this hands down. It recharges in just 1.8 hours using 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 GB70 takes a full 6 hours to recharge, which feels painfully slow in comparison.
Do both jump starters work on completely dead batteries below 3 volts?
The GBX75 has a manual override feature that lets you force a jump start on batteries below 3 volts by holding a button for 3 seconds. The GB70 does not have this feature, so it may not detect a completely dead battery. If you regularly deal with batteries that are totally drained, the GBX75 is the safer bet.
My Final Verdict
After testing both units on diesel engines, I’m picking the NOCO Boost GB70 as my winner for most buyers. It delivers 2000 amps for 6.0L diesels, gives you up to 40 jump starts per charge, and has a proven track record with over 30,000 reviews at 4.7 stars. The GBX75 is my runner-up — it’s better for larger 6.5L diesels and charges in just 1.8 hours, but you only get 12 jump starts per charge and it costs more.
If you’re on the fence, ask yourself how often you need to jump start and how fast you need to recharge. For daily reliability and more jump starts, get the GB70. For extreme situations with bigger engines and zero downtime, get the GBX75.
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...
This is the jump starter I’d buy for my own diesel truck. It handles 6.0L diesels with 2000 amps, gives 40 starts per charge, and the IP65 rating means it survives the work truck environment. Best value for most diesel owners.
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 owners with engines up to 6.5L or anyone who needs the 1.8-hour recharge time. The 2500-amp peak and manual override for dead batteries below 3 volts make it a lifesaver in extreme situations.
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