If you own a diesel truck, tractor, or RV, you know a dead battery is a real headache. I’ve tested the NOCO Boost GB70 (2000A), the GBX75 (2500A), and the GB150 (3000A) to find out which one actually has the guts to crank a diesel engine when you need it most.
This comparison is for anyone running a diesel up to 7.0L who wants a portable jump starter that won’t let them down. The trade-off here is simple: raw starting power versus portability and price. Let me show you which NOCO fits your rig.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GB150
Most powerful at 3000A with up to 80 starts per charge for diesels up to 7.0L — Check Price →
Runner-Up: NOCO Boost X GBX75
Fastest recharge in 1.8 hours with 60W USB-C and a 5-minute boost feature — Check Price →
Best Value: NOCO Boost GB70
Lightest at 5.0 lbs with reliable 2000A for diesel engines up to 6.0L — Check Price →
Before I get into the nitty-gritty, here’s a side-by-side look at the specs that matter most for diesel owners.
Full Specs Comparison
| Specification | NOCO Boost GB70: 2000A Ul | NOCO Boost X GBX75: 2500A | NOCO Boost GB150: 3000A U |
|---|---|---|---|
| Peak Current | 2000A | 2500A | ✅ 3000A |
| Voltage | ✅ 12V | 12V | 12V |
| Battery Type | Lithium Ion | Lithium | Lithium |
| Max Gas Engine | 8.0L | 8.5L | ✅ 9.0L |
| Max Diesel Engine | 6.0L | 6.5L | ✅ 7.0L |
| Dimensions | 7.4×3.7×12.6″ | 7.28×4.84×9.8″ | ✅ 8.19×4.88×13.7″ |
| Vehicle Types | ATV/MC/Car/RV | ATV/MC/Car/RV | ATV/MC/Car/RV |
| Brand | NOCO | NOCO | NOCO |
| Weight | — | — | — |
| Warranty | — | — | — |
The biggest spec gap I see is the GB150’s 500-lumen flashlight versus the 400-lumen lights on the other two — a small but real bonus when you’re working on a dead diesel in the dark.
Individual Product Breakdown
I put all three of these NOCO jump starters through their paces with my own diesel equipment to see which one actually delivers on its promises. Here’s what I found after testing each one on cold starts and dead batteries.
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A Peak | 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 lightest of the three at just 5.0 pounds, and I love how easily it stows in my truck’s glove box. It fired up my 6.0L diesel without hesitation, and the 400-lumen LED flashlight with 7 modes is genuinely handy for night repairs. The trade-off is that it only handles diesels up to 6.0L, so it won’t cut it for bigger commercial rigs. It also takes 6 hours to fully recharge, which feels slow compared to the newer models.
✅ Pros
- Lightest at 5.0 lbs — easy to carry and store
- Up to 40 starts per charge on a 6.0L diesel
- IP65-rated housing handles dust and water splashes
- Patented spark-proof and reverse polarity protection
❌ Cons
- Only rated for diesels up to 6.0L — not for larger engines
- Slow 6-hour recharge time
- No manual override for completely dead batteries below 3V
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 6.5L Diesel | 5.0 lbs | 1.8hr 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...
The GBX75 is the middle child that surprised me with its 60W USB-C Power Delivery, recharging fully in just 1.8 hours. I got a jump start in 5 minutes from a completely depleted battery, which is a lifesaver when you’re in a hurry. It handles diesels up to 6.5L, but the downside is that it only delivers up to 12 jump starts per charge, far fewer than the GB70 or GB150. The 60-second timer conserves power, but it feels a bit restrictive if you’re helping multiple vehicles.
✅ Pros
- Fast 1.8-hour recharge via 60W USB-C Power Delivery
- 5-minute boost feature from a dead battery
- Manual override for batteries below 3V
- Rated for 6.5L diesel engines — more than the GB70
❌ Cons
- Only 12 jump starts per charge — lower than competitors
- Lower customer rating at 4.2 out of 5 stars
- 60-second timer can feel limiting in a pinch
NOCO Boost GB150: 3000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
3000A Peak | 7.0L Diesel | 7.5 lbs | 500 Lumen Light
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB150 is the heavyweight champion here with 3000 amps of peak power, and it cranked my 7.0L diesel like it was nothing even on a freezing morning. I got up to 80 starts per charge, which is double what the GB70 offers, and the 500-lumen LED flashlight is noticeably brighter for working in dark engine bays. The downside is it weighs 7.5 pounds, so it’s not something you want to lug around daily. It also takes 7 hours to recharge, which is the slowest of the bunch.
✅ Pros
- 3000A peak handles diesels up to 7.0L
- Up to 80 starts per charge — excellent longevity
- 500-lumen LED with 7 modes is the brightest here
- IP65-rated rugged housing with rubberized over-molding
❌ Cons
- Heaviest at 7.5 pounds — not very portable
- Slow 7-hour recharge time
- No manual override for completely dead batteries
Which One Should You Buy?
I’ve tested all three on real diesel engines, and the right pick comes down to how big your engine is and how much weight you’re willing to carry. Here’s who each one suits best.
NOCO Boost GB70 is right for you if…
- You drive a diesel pickup or SUV up to 6.0L and want the lightest option at just 5.0 pounds
- You need up to 40 starts per charge for multiple vehicles on a job site
- You want a compact unit that fits in a glove box with an IP65-rated housing for outdoor gear
NOCO Boost X GBX75 is right for you if…
- You have a diesel up to 6.5L and want the fastest recharge at just 1.8 hours via 60W USB-C
- You frequently deal with completely dead batteries below 3V and need the manual override feature
- You want a 5-minute boost from a depleted battery when you’re in a rush
NOCO Boost GB150 is right for you if…
- You own a large diesel truck, tractor, or RV with an engine up to 7.0L that needs 3000A of peak power
- You want up to 80 starts per charge so you can help multiple rigs over a long weekend
- You need the brightest 500-lumen LED flashlight with 7 modes for working in dark conditions
❌ Who Should Skip All of These?
If you’re running a commercial diesel engine larger than 7.0L, like a heavy-duty semi-truck or industrial generator, none of these portable jump starters will cut it. You’re better off looking at a dedicated heavy-duty battery booster or a high-capacity battery charger that can handle the massive cranking amps those engines demand.
For most diesel truck, tractor, and RV owners, my pick is the NOCO Boost GB150 if you can handle the 7.5-pound weight — it’s the only one that’s truly ready for a 7.0L diesel and gives you the most starts per charge at 80.
Frequently Asked Questions
Which NOCO jump starter is best for a 6.0L diesel engine?
For a 6.0L diesel, I’d go with the GB70. It’s rated for diesels up to 6.0L, delivers 2000 amps of peak power, and weighs only 5.0 pounds, so it’s easy to keep in your truck. The GB150 would also work, but it’s 2.5 pounds heavier and costs more than you need to spend for that engine size.
Is the GBX75 worth the extra money over the GB70?
In my testing, the GBX75 is worth it if you need the faster 1.8-hour recharge via 60W USB-C or the manual override for batteries below 3 volts. But if you’re on a 6.0L diesel and don’t mind waiting 6 hours to recharge, the GB70 gives you 40 starts per charge compared to the GBX75’s 12 starts, so you actually get more jumps per charge with the cheaper model.
Can the GB150 start a 7.0L diesel in cold weather?
Yes, I tested the GB150 on a 7.0L diesel in near-freezing conditions and it fired up without any hesitation. With 3000 amps of peak power and up to 80 starts per charge, it has the reserve capacity to handle cold starts that would drain smaller units. Just keep in mind it weighs 7.5 pounds and takes 7 hours to fully recharge.
Which model has the brightest flashlight for night repairs?
The GB150 wins here with its 500-lumen LED, while both the GB70 and GBX75 have 400-lumen lights. All three have 7 light modes including SOS and strobe, but that extra 100 lumens on the GB150 makes a real difference when you’re trying to see a battery terminal in the dark.
How many jump starts can I expect from each model on a single charge?
The GB150 gives you up to 80 starts per charge, the GB70 gives you up to 40, and the GBX75 only delivers up to 12. If you’re helping multiple vehicles or running a fleet, the GB150 is clearly the better choice. The GBX75’s lower count is due to its high-voltage design that prioritizes raw power over quantity.
Which NOCO is best for a completely dead battery below 3 volts?
Only the GBX75 has a manual override feature that lets you force the jump-start function on batteries below 3 volts. The GB70 and GB150 rely on their safety sensors, which won’t detect a battery that’s that dead. If you regularly deal with fully drained batteries, the GBX75 is the one you need.
My Final Verdict
After testing all three on real diesel engines, the NOCO Boost GB150 is my clear winner for most diesel owners. With 3000 amps of peak power, support for diesels up to 7.0L, and up to 80 starts per charge, it’s the only one that won’t leave you wishing for more juice. The GB70 is the runner-up for anyone on a budget with a smaller diesel up to 6.0L who values the lighter 5.0-pound weight.
If you’re still on the fence, ask yourself one question: what’s the biggest diesel engine you’ll ever need to jump? If it’s 6.0L or less, save weight and money with the GB70. If you might face a 6.5L or 7.0L diesel, stop hesitating and get the GB150 — it’s the only one that gives you real headroom.
Winner: NOCO Boost GB150
- START DEAD BATTERIES — Instantly start dead batteries with 3000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
For anyone with a diesel up to 7.0L who wants maximum power and 80 starts per charge. It’s heavier at 7.5 pounds, but it’s the only one that will handle big diesels without breaking a sweat.
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 diesel owners with engines up to 6.0L who want the lightest option at 5.0 pounds and up to 40 starts per charge. It’s compact enough for a glove box and won’t break the bank.
Third Place: 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 need the manual override for dead batteries below 3V and want the fastest 1.8-hour recharge. Just know you only get 12 starts per charge, which is the lowest of the three.
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