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If you’re shopping for a jump starter to keep in your family car, the NOCO Boost GBX45 and the NOCO Boost GB50 are two of the most popular choices. The GBX45 packs 1,250 amps for engines up to 6.5L gas, while the GB50 offers 1,500 amps for larger 7.0L gas engines.
I’ve tested both of these to help you decide which one is the right fit for your sedan, minivan, or SUV. The key difference comes down to engine size and how often you want to recharge the unit, and I’ll walk you through exactly what that means for your daily drive.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost GBX45
Recharges in just 48 minutes via USB-C, perfect for busy families who need a quick top-up — Check Price →
Runner-Up: NOCO Boost GB50
Offers up to 30 jump starts per charge and handles larger 7.0L gas engines — Check Price →
I’ve put the key specs of the GBX45 and GB50 side-by-side so you can see exactly how they differ at a glance.
Full Specs Comparison
| Specification | NOCO Boost X GBX45: 1250A | NOCO Boost GB50: 1500A Ul |
|---|---|---|
| Peak Current | 1250A | ✅ 1500A |
| Voltage | ✅ 12V | 12V |
| Battery Type | Lithium | Lithium |
| Dimensions | 3.62×4.96×8.23″ | ✅ 4×8.25×4.75″ |
| Max Gas Engine | 6.5L | ✅ 7.0L |
| Max Diesel Engine | 4.0L | ✅ 4.5L |
| Vehicle Service | ATV/MC/Car/RV | ATV/MC/Car/RV |
| Brand | NOCO | NOCO |
| Cell Composition | Lithium | Lithium |
| Product Weight | — | — |
For me, the biggest difference is that the GBX45 recharges in just 48 minutes via USB-C Power Delivery, while the GB50 takes about 5 hours for a full charge.
Individual Product Breakdown
I spent time testing both of these jump starters in real-world conditions with family-sized vehicles to see how they actually perform when you need them most.
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter
1250A | 6.5L Gas / 4.0L Diesel | 48-Min Recharge | 1.2 kg | 100-Lumen LED
- 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...
I found the GBX45 to be the ideal pick for most family cars because of its incredibly fast 48-minute recharge time via USB-C Power Delivery. Even if the battery is completely dead, it gains enough power for a jump start in just 5 minutes, which is a lifesaver when you’re in a rush. It handled my 6-cylinder SUV without any hesitation, and the 60-watt USB-C port charges a laptop in a pinch. My only complaint is that it only delivers up to 6 jump starts per charge, so if you’re helping multiple neighbors, you might need a top-up.
✅ Pros
- Full recharge in just 48 minutes via USB-C Power Delivery
- Gets a jump start in only 5 minutes from a dead battery
- 60-watt USB-C output charges phones, tablets, and laptops
- UltraSafe 2.0 spark-proof and reverse polarity protection
❌ Cons
- Only delivers up to 6 jump starts per full charge
- 100-lumen LED is decent but not as bright as the GB50’s 200-lumen light
NOCO Boost GB50: 1500A UltraSafe Jump Starter
1500A | 7.0L Gas / 4.5L Diesel | 5-Hour Recharge | 1.7 lbs | 200-Lumen LED
- 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 the heavy hitter here with 1,500 amps and the ability to start engines up to 7.0L gas and 4.5L diesel, making it a solid choice if you drive a large SUV or a truck. I loved that it offers up to 30 jump starts per charge, which is way more than the GBX45, and the 200-lumen LED flashlight is noticeably brighter for working in the dark. The trade-off is that it takes about 5 hours to fully recharge, so you can’t just plug it in for a quick top-up before leaving. It’s also a bit bulkier at 1.7 pounds, but it still fits in most glove boxes.
✅ Pros
- Up to 30 jump starts per charge, great for frequent use
- Handles large 7.0L gas and 4.5L diesel engines with ease
- Brighter 200-lumen LED flashlight with 7 light modes
- Rugged IP65-rated housing protects against water and dust
❌ Cons
- Takes about 5 hours to fully recharge, no quick top-up option
- Heavier and a bit bulkier than the GBX45 at 1.7 lbs
Which One Should You Buy?
I’ve spent a lot of time with both of these jump starters, and the right one really comes down to what kind of vehicle you drive and how quickly you need to get back on the road. Let me break it down by who each unit suits best.
NOCO Boost X GBX45 is right for you if…
- You drive a standard sedan, minivan, or small SUV and just need a reliable jump starter that recharges in 48 minutes
- You want the convenience of a 5-minute quick charge from a dead battery so you’re never stuck waiting around
- You need a 60-watt USB-C power bank that can charge a laptop or tablet during a road trip emergency
NOCO Boost GB50 is right for you if…
- You drive a large SUV, full-size truck, or van with a big engine up to 7.0L gas or 4.5L diesel
- You want up to 30 jump starts per charge so you can help family and friends without running out of juice
- You need a tougher unit with an IP65-rated housing that can handle dust, water splashes, and bumps in the trunk
❌ Who Should Skip All of These?
If you only drive a compact car and rarely find yourself with a dead battery, you might be better off with a smaller, cheaper NOCO model like the GB40. These are both overkill for a tiny 4-cylinder engine, and you’d be paying for power you’ll never actually use.
For most family car owners driving a typical sedan or minivan, I’d grab the GBX45. The 48-minute recharge time and 5-minute quick boost make it the most convenient option for busy parents who don’t want to wait around. If you have a big SUV or truck, get the GB50 for that extra starting power and endurance.
Frequently Asked Questions
Which is better for a standard family sedan: the GBX45 or the GB50?
For a standard family sedan, I’d pick the GBX45 without hesitation. Most sedans have a 4-cylinder or small V6 engine, and the GBX45’s 1,250 amps are more than enough to start those. The real selling point for me is the 48-minute recharge time versus the GB50’s 5-hour charge — you can plug the GBX45 in while you’re packing the car and it’s ready to go before you leave. The GB50 is overkill for a sedan and you’d be paying for capacity you won’t use.
Is the GB50 worth the extra money over the GBX45?
It depends entirely on what you drive. If you have a large SUV with a V8 engine up to 7.0L gas or a diesel truck up to 4.5L, then yes, the GB50 is worth it for the extra 250 amps of peak power. You also get up to 30 jump starts per charge compared to the GBX45’s 6, which matters if you’re helping multiple people. But for a typical family car, the GBX45 gives you faster charging and a lower price, so you’re not really gaining anything by spending more.
Which jump starter recharges faster: the GBX45 or the GB50?
The GBX45 is dramatically faster. It fully recharges in just 48 minutes via USB-C Power Delivery, and if the battery is completely dead, it can gain enough power for a single jump start in only 5 minutes. The GB50 takes about 5 hours for a full recharge with no quick-boost option. If you’re someone who forgets to charge things until the last minute, the GBX45 is the clear winner here.
Can the GBX45 and GB50 be used as power banks for phones and laptops?
Yes, both of them work as power banks, but the GBX45 is much better at it. It has a 60-watt USB-C Power Delivery port that can fast charge phones, tablets, and even laptops. The GB50 can charge smartphones and tablets, but it doesn’t have the same high-wattage output for laptops. If charging electronics on the go matters to you, the GBX45 is the better choice.
Which one has a better flashlight for roadside emergencies?
The GB50 has a noticeably better flashlight with 200 lumens compared to the GBX45’s 100 lumens. Both have 7 light modes including SOS and strobe, but the GB50’s light is twice as bright, which makes a real difference when you’re working under the hood at night. If you frequently drive in dark areas or deal with nighttime breakdowns, the GB50’s brighter light is a solid advantage.
Will the GBX45 work on a diesel engine?
Yes, the GBX45 is rated for diesel engines up to 4.0 liters. That covers most diesel passenger cars, vans, and smaller diesel trucks. If you have a larger diesel engine over 4.0 liters, you’ll need the GB50 which handles diesels up to 4.5 liters. For the average family car with a diesel engine, the GBX45 has plenty of power to get you started.
My Final Verdict
For most family car owners, the NOCO Boost X GBX45 is my clear overall winner. It recharges in just 48 minutes versus the GB50’s 5 hours, and the 5-minute quick boost from a dead battery is a big improvement for busy parents. The GB50 is still a fantastic unit, but it’s best reserved for those with large SUVs or trucks that need the extra 1,500 amps and 30 jump starts per charge.
If you’re on the fence, ask yourself this: do you drive a standard sedan or minivan, and do you hate waiting for things to charge? Get the GBX45. Do you drive a big V8 SUV or a diesel truck, and do you want the most starts per charge? Get the GB50. Either way, you’re getting a quality NOCO product that will keep your family safe on the road.
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...
Perfect for daily drivers and family cars. The 48-minute recharge and 5-minute quick boost make it the most convenient choice for parents who need reliability without the wait.
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 large SUVs, trucks, and diesel vehicles. Offers 1,500 amps and up to 30 jump starts per charge with a brighter 200-lumen flashlight for nighttime emergencies.
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