NOCO Boost X GBX55 Review: 1750A With Turbo Charging
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The NOCO Boost X GBX55 sits in the middle of the Boost X range. It has enough power for most V8 trucks and mid-size diesels, yet still recharges in just over an hour.
In this GBX55 review, we look at its power, charging, safety features and how it compares to the GBX45 and GB70.
NOCO Boost X GBX55
4.6 / 5 ReviewsWhiz Score- 1750A for gas engines up to 7.5L and diesels up to 5.0L
- Recharges in about 1.2 hours
- 60W two-way USB-C power bank
✅ Pros
- Covers most V8 trucks and SUVs
- Fast USB-C recharge
- Jump-ready in 5 minutes from empty
- UltraSafe 2.0 protection
- Brighter 200-lumen light
❌ Cons
- Not for diesels above 5.0L
- Pricier than the classic GB70
- Rated starts per charge are modest
NOCO Boost X GBX55 Key Specifications
| Peak current | 1750 amps |
| Engine size | Up to 7.5L gas, 5.0L diesel |
| Recharge time | About 1.2 hours (USB-C PD) |
| Quick boost | Enough for a jump in 5 minutes |
| Starts per charge | Up to 9 |
| Power bank | 60W USB-C, two-way |
| Safety | UltraSafe 2.0 |
| Flashlight | 200 lumens, 7 modes |
Starting Power
Rated at 1,750 amps, the GBX55 handles gas engines up to 7.5L and diesel engines up to 5.0L. That covers most half-ton pickups, full-size SUVs and many mid-size diesel trucks.
Turbo Charging and Timer
With USB-C Power Delivery, the GBX55 recharges in about 1.2 hours. It can gain enough energy for a jump in five minutes, even from empty. A 60-second timer manages power, and NOCO rates it for up to nine starts per charge.
Power Bank and Flashlight
The 60W two-way USB-C port charges phones, tablets and many laptops. The 200-lumen LED has seven modes, including SOS and strobe.
GBX55 vs GB70
The GB70 offers 2000A and more rated starts, while the GBX55 recharges far faster and has a stronger USB-C power bank. If you use your jump starter as a power bank or forget to charge it, the GBX55 is the better fit.
Who Should Pick the GBX55
The GBX55 is the sweet spot in NOCO’s Boost X range for owners of V8 cars and trucks. Its 1750 amps are rated for gas engines up to 7.5 liters and diesels up to 5.0 liters. That covers most half-ton pickups, many full-size SUVs and performance cars, plus smaller diesel trucks.
Because it keeps the fast USB-C charging of the Boost X line, it is a good choice for drivers who want more starting power without giving up convenience. Families with one small car and one large truck can share a single GBX55 between both vehicles.
Charging, Quick Boost and the 60-Second Timer
A full recharge over USB-C Power Delivery takes about 1.2 hours with a suitable charger. If you discover it is almost empty at the worst moment, about five minutes of charging gives enough energy for a jump, according to NOCO. The two-way 60W USB-C port also powers phones, tablets and many laptops.
When you press the power button, a 60-second timer keeps the clamps live long enough to start the car. It then shuts off automatically so the battery does not drain if you forget to turn it off.
GBX55 vs Similar Jump Starters
| Model | Main strength | Trade-off | Best for |
|---|---|---|---|
| NOCO Boost X GBX55 | Fast USB-C charging, V8 power | Modest starts per charge | Half-ton trucks and V8 cars |
| NOCO Boost X GBX45 | Smaller and cheaper | Less power for big engines | Most cars and crossovers |
| NOCO Boost HD GB70 | More rated starts, proven design | Slow charging, heavier | Owners who rarely recharge |
| NOCO Boost X GBX155 | Heavy-duty power | Bigger and pricier | Large diesels and fleets |
Safe Jump Starting Tips
- Check the battery for cracks or leaks before connecting anything.
- Connect red to positive and black to negative or chassis ground.
- Wait for the ready light before turning the key.
- Crank for a few seconds, then rest at least 30 seconds between attempts.
- If the car still will not start after several tries, the problem may be the starter, fuel or a failed battery rather than charge.
Durability and Warranty
The GBX55 has a tough housing designed for the trunk, garage and job site. Store it out of direct sun, and charge it every few months if you do not use it. NOCO covers it with a one-year warranty and offers US-based support. With basic care, a lithium jump starter like this usually lasts several years.
What Is in the Box
The GBX55 comes with the jump starter, attached heavy-duty clamps, a USB-C to USB-C cable and a storage bag. A fast USB-C wall charger is not always included, so check the listing and use a Power Delivery charger to get the quoted recharge times. A slower charger still works, but it takes longer.
Final Things to Consider Before Buying
- Check your engine size and fuel type against the GBX55’s ratings.
- Think about where you will store it and how often you will recharge it.
- Decide whether you will use it as a power bank, which favors the Boost X line.
- Compare the price with the GB70 if fast charging is not important to you.
For most V8 owners who want a modern, fast-charging jump starter, the GBX55 ticks the right boxes.
How Many Jumps Can You Expect?
NOCO rates the GBX55 for up to nine jump starts per charge. In real life, the number depends on the engine size, temperature and how flat the battery is. A V8 on a cold morning uses far more energy than a four-cylinder in summer. Treat the rating as a best case, and recharge after every jump so the unit is always ready for the next one. Because charging takes only about an hour over USB-C, keeping it topped up is easy.
Who Should Buy the NOCO Boost X GBX55?
Buy it if you drive a V8 truck or SUV and want fast recharging and a laptop-capable power bank.
Skip it if you drive a small car (choose the GBX45) or a large diesel (choose the GB150 or GBX155).
Alternatives to Consider
- NOCO Boost X GBX45: 1250A for smaller engines.
- NOCO Boost HD GB70: 2000A with more rated starts.
- NOCO Boost X GBX155: 4250A for the largest engines.
Final Verdict
The NOCO Boost X GBX55 is a smart choice for truck and SUV owners who want modern charging speed with NOCO’s proven safety. It is the Boost X model we would pick for most V8 drivers.
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Frequently Asked Questions
What can the NOCO GBX55 start?
Gas engines up to 7.5L and diesel engines up to 5.0L.
How long does the GBX55 take to charge?
About 1.2 hours with a USB-C PD charger.
How many starts per charge?
Up to nine.
Can it charge a laptop?
Yes, through its 60W USB-C port.
Is the GBX55 spark-proof?
Yes. It uses NOCO's UltraSafe 2.0 spark-proof and reverse polarity protection.
How we evaluated: this review is based on the manufacturer’s published specifications, the product’s feature set, and how it compares with competing products in the same price range. Product details and images are provided by Amazon and may change. Prices and availability are accurate as of the time shown on Amazon and are subject to change.