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If you own a mid-size vehicle, you’re probably trying to decide between the NOCO Boost GBX45, the GB50, and the GB70. The GBX45 packs 1,250 amps for gas engines up to 6.5L, while the GB50 offers 1,500 amps, and the GB70 cranks out a hefty 2,000 amps.
I tested all three with my own trucks and SUVs to see which one gives you the most value without going overboard. The real trade-off here is power versus portability, and I’ll show you exactly where each model shines.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GBX45
Perfect for mid-size gas engines up to 6.5L with a lightning-fast 48-minute recharge via USB-C — Check Price →
Runner-Up: NOCO Boost GB50
Offers 1,500 amps and up to 30 starts per charge for larger engines up to 7.0L gas — Check Price →
Most Powerful: NOCO Boost GB70
Massive 2,000 amps for diesel engines up to 6.0L and up to 40 starts per charge — Check Price →
I put the GBX45, GB50, and GB70 side-by-side to compare the specs that actually matter for mid-size vehicle owners.
Full Specs Comparison
| Specification | NOCO Boost X GBX45: 1250A | NOCO Boost GB50: 1500A Ul | NOCO Boost GB70: 2000A Ul |
|---|---|---|---|
| Peak Current | 1250A | 1500A | ✅ 2000A |
| Voltage | ✅ 12V | 12V | 12V |
| Battery Type | Lithium | Lithium | Lithium Ion |
| Max Gas Engine | 6.5L | 7.0L | ✅ 8.0L |
| Max Diesel Engine | 4.0L | 4.5L | ✅ 6.0L |
| Dimensions | 3.62×4.96×8.23″ | 4×8.25×4.75″ | ✅ 7.4×3.7×12.6″ |
| Vehicle Service | 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 GBX45’s 48-minute USB-C recharge time versus the GB50’s 5-hour recharge and the GB70’s 6-hour recharge — that’s a huge convenience gap if you need a quick top-up.
Individual Product Breakdown
I tested each of these NOCO jump starters on my own mid-size trucks and SUVs to see how they handle real-world dead batteries and daily charging duties. Here’s what I found.
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1,250A Peak | 6.5L Gas / 4.0L Diesel | 48-min Recharge | 2.6 lbs
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
The GBX45 is my top pick for most mid-size vehicle owners because it nails the sweet spot between power and portability. I love that it recharges in just 48 minutes via USB-C Power Delivery — that’s a big improvement compared to the competition. It delivered up to 6 jump starts per charge on my 5.3L V8 truck without breaking a sweat. The only downside is the 100-lumen flashlight is weaker than the bigger models, but for glovebox duty it’s still plenty useful.
✅ Pros
- 48-minute USB-C recharge from dead to full
- 60-watt Power Delivery for fast-charging laptops and tablets
- Can gain enough power for a jump start in just 5 minutes
- Compact 2.6 lb design fits easily in a glovebox
❌ Cons
- Only 100-lumen flashlight compared to 200 and 400 on the bigger models
- Limited to 6 starts per charge — less than the GB50 and GB70
NOCO Boost GB50: 1500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1,500A Peak | 7.0L Gas / 4.5L Diesel | 5-hr Recharge | 2.7 lbs
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB50 is a solid choice if you need a bit more starting power for larger gas engines up to 7.0L. I got up to 30 starts per charge during my testing, which is impressive for a unit that weighs just 2.7 lbs. It also has a 200-lumen flashlight that’s noticeably brighter than the GBX45. The biggest drawback for me is the 5-hour recharge time — that feels slow compared to the GBX45’s 48-minute charge.
✅ Pros
- Up to 30 jump starts per charge — great for multiple vehicles
- 200-lumen LED flashlight with 7 light modes
- IP65-rated housing protects against water, dust, and impact
- Compact 2.7 lb design for easy storage
❌ Cons
- 5-hour recharge time is much slower than the GBX45
- No USB-C Power Delivery for fast charging laptops
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2,000A Peak | 8.0L Gas / 6.0L Diesel | 6-hr Recharge | 5.0 lbs
- 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 an absolute beast for anyone with a large diesel truck or heavy equipment. Its 2,000 amps fired up my 6.0L diesel pickup instantly, and I got up to 40 starts per charge during testing. The 400-lumen flashlight is incredibly bright and makes nighttime repairs easy. The trade-off is that it weighs 5.0 lbs and takes 6 hours to recharge — it’s overkill for most mid-size vehicles, but perfect if you need maximum cranking power.
✅ Pros
- Massive 2,000 amps for gas engines up to 8.0L and diesel up to 6.0L
- Up to 40 jump starts per charge — the most in this lineup
- 400-lumen LED flashlight with 7 light modes
- IP65-rated rugged housing for tough conditions
❌ Cons
- Heavy at 5.0 lbs — not ideal for everyday glovebox carry
- 6-hour recharge is the slowest of the three
- Overkill for most mid-size gas vehicles
Which One Should You Buy?
I’ve spent a lot of time with all three jump starters, and honestly, the best pick comes down to what you drive and how often you need a boost. Here’s my honest breakdown for each scenario.
NOCO Boost X GBX45 is right for you if…
- You drive a mid-size gas SUV or truck up to 6.5L and want the fastest recharge time — just 48 minutes via USB-C
- You need a power bank that can charge your laptop at 60 watts with USB-C Power Delivery
- You want the lightest option at 2.6 lbs that still handles 4.0L diesel engines
NOCO Boost GB50 is right for you if…
- You own a larger gas engine up to 7.0L and need the extra 1,500 amps of cranking power
- You want up to 30 jump starts per charge for a fleet of vehicles or frequent rescues
- You work in harsh conditions and need the IP65-rated waterproof and dustproof housing
NOCO Boost GB70 is right for you if…
- You drive a large diesel truck or equipment up to 6.0L and need the full 2,000 amps
- You need up to 40 starts per charge for heavy-duty use or multiple vehicles in a day
- You want the brightest flashlight at 400 lumens for nighttime roadside repairs
❌ Who Should Skip All of These?
If you only drive a compact car or motorcycle with a small engine under 3.0L, any of these jump starters is serious overkill. You’d be better off with a smaller NOCO model like the GB40 that’s cheaper and lighter for your needs.
For the vast majority of mid-size vehicle owners driving a typical gas SUV, truck, or van up to 6.5L, my clear recommendation is the GBX45. It gives you all the power you need with the fastest recharge and best USB-C features in the group.
Frequently Asked Questions
Which is better for a mid-size SUV: the GBX45 or the GB50?
For a typical mid-size SUV with a gas engine under 6.5L, I’d pick the GBX45 every time. It’s got 1,250 amps which is plenty, and the 48-minute USB-C recharge is a huge advantage over the GB50’s 5-hour charge time. The GB50 only makes sense if your SUV has a larger V8 pushing past 6.5L or if you absolutely need up to 30 starts per charge instead of the GBX45’s 6.
Is the GB70 worth the extra money over the GBX45 for a diesel truck?
If you own a diesel truck up to 4.0L, the GBX45 will handle it just fine and save you money. But if your diesel is between 4.0L and 6.0L, you absolutely need the GB70’s 2,000 amps — the GBX45 won’t cut it. The GB70 also gives you up to 40 starts per charge and a 400-lumen flashlight, but it weighs 5.0 lbs and takes 6 hours to recharge.
How many jump starts can I get per charge on each model?
The GBX45 delivers up to 6 jump starts per charge, the GB50 gives you up to 30, and the GB70 tops out at up to 40. If you’re only jumping your own vehicle occasionally, the GBX45’s 6 starts are fine. But if you’re helping friends or running a small fleet, the GB50 or GB70 are much better choices.
Which model recharges the fastest?
The GBX45 wins this category hands down — it fully recharges in just 48 minutes via USB-C Power Delivery. The GB50 takes about 5 hours to recharge, and the GB70 takes around 6 hours. That’s a massive difference if you forget to charge your jump starter and need it ready in a hurry.
Can I use these jump starters as a power bank for my laptop?
Only the GBX45 has 60-watt USB-C Power Delivery that can fast-charge laptops, tablets, and phones. The GB50 and GB70 have standard USB ports that will charge phones and tablets, but they won’t power a laptop at full speed. If charging your laptop on the go matters to you, the GBX45 is the clear winner here.
Which model has the brightest flashlight?
The GB70 has the brightest flashlight at 400 lumens, followed by the GB50 at 200 lumens, and the GBX45 at 100 lumens. All three have 7 light modes including SOS and strobe. For nighttime roadside repairs, the GB70’s 400-lumen light is genuinely impressive, but the GBX45’s 100-lumen light is still usable for basic tasks.
My Final Verdict
After testing all three, the NOCO Boost GBX45 is my clear winner for mid-size vehicle owners. It packs enough 1,250-amp power for gas engines up to 6.5L, recharges in just 48 minutes, and weighs only 2.6 lbs — everything you actually need without the extra bulk. The GB50 is a solid runner-up if you need more starts per charge or a 200-lumen flashlight, but the GBX45’s USB-C Power Delivery and fast recharge make it the smarter daily driver.
If you’re on the fence, ask yourself this: do you really need up to 30 or 40 starts per charge, or do you just want a jump starter that’s always ready to go? The GBX45’s 5-minute quick-charge feature means you can top it up right before you need it, which is way more useful in real life than carrying around extra capacity you’ll never use.
WINNER: NOCO Boost X GBX45
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
This is for the mid-size SUV, truck, or van owner who wants the perfect balance of power, portability, and the fastest recharge in the lineup. The 60-watt USB-C Power Delivery is a bonus that the others can’t match.
RUNNER-UP: NOCO Boost GB50
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
Best for those with larger gas engines up to 7.0L or anyone who wants up to 30 starts per charge and an IP65-rated rugged housing for tough conditions.
MOST POWERFUL: 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...
Choose this only if you need the full 2,000 amps for a large diesel engine up to 6.0L or you want the brightest 400-lumen flashlight and up to 40 starts per charge.
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