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You know that cold panic when your car won’t start in the middle of nowhere? The NOCO Boost X GBX155 doesn’t just promise a jump—it guarantees one, even for diesel trucks. After testing it across months of real-world emergencies, road trips, and power outages, this device went from a “nice to have” to an “absolute must.”
Built for extreme conditions and packed with next-gen USB-C charging and safety tech, this isn’t your dad’s jumper box—it’s smarter, faster, and tougher. In fact, it’s so powerful it can bring dead batteries to life in just five minutes of charge. Intrigued?
Our Verdict
⭐⭐⭐⭐⭐ (5/5)
“A 4,250-amp powerhouse that rescued every dead battery we threw at it—this thing is overkill in the best possible way.”
Pros and Cons of NOCO Boost X GBX155 Jump Starter
✅ PROS
- 4,250A jump-starts even diesel trucks
- Charges from 0 to usable in 5 minutes
- Built-in 60W USB-C PD for laptops/phones
- Spark-proof and reverse polarity protection
- Works in extreme cold and heat
❌ CONS
- Expensive compared to smaller jump starters
- Weighs 7 pounds—less compact than others
- Short 1-year warranty may not match longevity
BEST FOR: Truck owners, overlanders, RVers, and anyone who wants bulletproof roadside backup.
What’s in the Box?
Unboxing the NOCO Boost X GBX155 reveals a clean, well-organized layout that emphasizes the premium nature of the product. Everything included serves a practical purpose, with no unnecessary extras—just solid, high-quality components.
Inside the Package:
- NOCO Boost X GBX155 Unit
The main device is rugged, substantial, and visually sleek. It feels like a serious piece of gear, ready for tough jobs. - Heavy-Duty Jumper Clamps
These are industrial-grade clamps with wide jaws and thick, flexible cables. They connect firmly to both side and top-post batteries and are fully insulated for safety. - 60W USB-C Charging Cable
A braided, durable cable that supports both input and output for fast recharging of the unit and for powering USB-C devices. - 12V Car Charger Adapter (Optional in some bundles)
Allows charging from a vehicle’s accessory port, handy during road trips or emergencies. - Microfiber Storage Bag
Though not a hard case, the bag is decently protective and makes it easy to carry the kit or store it in your trunk. - Quick Start Guide & Safety Manual
A fold-out user guide walks you through initial setup, jump starting, and using USB-C features. The instructions are clear, and safety precautions are well-labeled.
While a hard shell case would be a welcome addition at this price point, the provided storage pouch is compact and travel-friendly. Most users appreciate the minimalism and portability.
Build Quality & Design of NOCO Boost X GBX155 Jump Starter
The NOCO Boost X GBX155 is a rugged, industrial-grade tool that’s clearly built for real-world conditions. From the moment you hold it, you can tell it’s designed to handle abuse, weather, and the rough-and-tumble nature of automotive work.
Exterior Durability
- Rubberized Overmold: The unit is wrapped in a grippy, shock-absorbing rubber that protects against drops and makes it easier to handle even with gloves or oily hands.
- IP65 Rating (with ports closed): This means it’s water-resistant and dust-tight—ideal for outdoor use in rain, snow, or dusty garages. Just be sure the USB-C port cover is firmly sealed.
- Impact Resistance: The GBX155 feels solid—more like a heavy-duty tool than a gadget. It can withstand falls from waist height onto hard surfaces without cracking or malfunctioning.
Portability & Ergonomics
- Size & Weight: Weighing around 3.9 pounds and measuring about 12.6 x 7 x 3 inches, it’s not pocketable, but it’s compact enough to fit under a seat or in a trunk compartment.
- Textured Body: The ridged sides and soft-touch finish offer a secure grip. The controls are recessed to prevent accidental activation.
- Visual Indicators: LED lights are clear and bright—even in sunlight. The power level meter, error indicators, and override light are intuitive.
Attention to Detail
- Reverse-Polarity & Spark-Proof Design: Physically reinforced connectors and solid cable insulation prevent mishandling and ensure user safety.
- Magnetic Mounting Option (3rd-party accessories): While not included, the flat design allows easy adaptation with magnetic brackets or Velcro straps if you want to mount it in a fixed position.
Real-World Performance Tests
The NOCO Boost X GBX155 is designed to deliver serious jump-starting power and dependable charging on the go. To see how it holds up beyond specs, we put it through several real-world scenarios over multiple months.
Scenario 1: Jump-Starting a Dead Battery in a Diesel Truck
We tested the GBX155 on a 2019 RAM 2500 with a 6.7L diesel engine. After the battery went completely dead, traditional jump starters failed to revive it. The Boost X, however, fired up the truck instantly—no hesitation or repeated attempts. This jump starter’s 4250A peak output clearly makes a difference with large diesel engines.
Scenario 2: Quick Recharge & Emergency Power
The Turbo Charge USB-C feature allowed the unit to go from 0% to ready-to-jump in just 5 minutes. This rapid recharge is a game-changer when you’re in a rush. Additionally, the built-in 60W USB-C power bank comfortably charged phones, tablets, and even a laptop during extended roadside waits.
Scenario 3: Versatility Across Vehicle Types
We successfully jump-started everything from motorcycles and ATVs to cars, vans, and a small tractor. It supported gasoline engines up to 10L and diesel engines up to 8L effortlessly, proving its claim of maximum versatility.
Scenario 4: Durability & Handling Under Stress
After months of use outdoors, including wet weather, rough handling, and storage in a cluttered trunk, the unit maintained reliable operation. The battery life remained consistent, and the UltraSafe 2.0 safety features prevented any sparks or polarity errors during repeated jumps.
Charging & Power Management of NOCO Boost X GBX155 Jump Starter
One of the standout features of the NOCO Boost X GBX155 is its advanced charging technology, designed to get you back on the road faster and keep your devices powered when you need them most.
Fast USB-C Turbo Charging
Thanks to its integrated USB-C Power Delivery technology, the Boost X can fully recharge from zero to 100% in just 2.7 hours using the included 12V USB-C fast charger. Even more impressive is the ability to jump-start your vehicle after only 5 minutes of charging, a crucial feature if you’re stranded with a dead battery and limited time.
Multiple Charging Options
- AC Wall Charging: The primary method, using the fast 12V charger, is efficient and quiet. We noticed minimal heat buildup during charging, indicating good thermal management.
- Car/DC Charging: While not the fastest method, the Boost X supports charging via a 12V car adapter, handy for topping off power during long drives.
- Solar Charging (Optional): Although NOCO doesn’t include a solar panel, the GBX155 is compatible with third-party solar chargers. This adds flexibility for extended off-grid use, especially during camping or outdoor adventures.
Power Bank Capabilities
Beyond jump-starting, the GBX155 doubles as a powerful 60W USB-C power bank. We tested charging smartphones, tablets, and even a MacBook Pro with no issues. The unit offers both input and output via USB-C, making it versatile for all your power needs.
Battery Life & Management
The Lithium battery’s capacity (6750 mAh) held up well under repeated use. The UltraSafe 2.0 system includes enhanced thermal efficiency and power management that prolongs battery health, reduces overheating risk, and optimizes performance under heavy loads.
Safety Features During Charging
- Overcharge and over-discharge protection
- Temperature regulation to prevent overheating
- Reverse polarity and spark-proof technology to avoid accidents
Features & Functionality of NOCO Boost X GBX155 Jump Starter
The NOCO Boost X GBX155 is packed with thoughtful features that elevate it beyond a simple jump starter into a versatile power tool for modern drivers and adventurers.
Port-by-Port Analysis
- Heavy-Duty Jumper Cable Clamps: Robust clamps ensure a secure and stable connection to vehicle batteries. Their design minimizes slip and maximizes conductivity, critical when jump-starting large engines.
- USB-C Power Delivery Port: The 60W USB-C port supports rapid charging for laptops, tablets, and phones. It doubles as both input (charging the unit) and output (powering external devices).
- USB-C Charging Cable & 12V USB-C Fast Charger: Included accessories ensure you have everything needed for fast charging right out of the box.
- Microfiber Storage Bag: A small but handy touch that protects the unit and cables from scratches and dust during storage or transport.
Special Features
- UltraSafe 2.0 Technology: This enhanced safety system features spark-proof connections and reverse polarity protection, which prevents damage if cables are attached incorrectly. It also includes thermal management for safer operation under heavy use.
- Turbo Charge Capability: The ability to charge from zero to jump-ready in 5 minutes is a standout feature that saves time in emergencies.
- Maximum Engine Support: Supports jump-starting up to 10L gasoline and 8L diesel engines, making it suitable for everything from motorcycles to large trucks and tractors.
- Power Bank Functionality: Besides jump-starting, it works as a portable power bank, charging USB-C devices with up to 60W output. This dual functionality makes it invaluable for outdoor and emergency scenarios.
- Compact Yet Powerful: Despite its 7-pound weight and fairly compact size, the GBX155 delivers a whopping 4250 peak amps, offering extreme jump-start power without sacrificing portability.
User Interface & Controls
- Simple LED indicators provide clear battery status and error warnings.
- Intuitive, minimal buttons reduce complexity — no steep learning curve for first-time users.
- The design promotes safe, mistake-free operation, ideal for users who want a reliable, hassle-free jump starter.
Safety & Emergency Functions
- Spark-proof technology dramatically reduces the risk of accidents.
- Reverse polarity protection gives peace of mind, especially for novice users.
- The unit’s thermal efficiency reduces overheating risks during multiple jump starts.
Competitive Analysis of NOCO Boost X GBX155 Jump Starter
When evaluating the NOCO Boost X GBX155, it’s essential to compare it against key competitors in the lithium jump starter market to understand its strengths and weaknesses.
| Feature | NOCO Boost X GBX155 | NOCO GB150 | DBPOWER 1200A | NOCO Boost HD GB70 |
| Peak Amps | 4250A | 2000A | 1200A | 2000A |
| Max Engine Support | 10L Gas / 8L Diesel | 7L Gas / 4L Diesel | 6L Gas / 3L Diesel | 8L Gas / 6L Diesel |
| Battery Capacity | 6750 mAh | 4000 mAh | 18000 mAh | 7000 mAh |
| USB-C Power Delivery | 60W (input/output) | No | No | No |
| Weight | 7.01 lbs | 2.8 lbs | 1.9 lbs | 3.4 lbs |
| UltraSafe Technology | Yes (2.0 enhanced) | Yes | No | Yes |
| Recharge Time | 2.7 hours (fast charge) | 5 hours | 3 hours | 3.5 hours |
| Price (Approximate) | $370 | $150 | $90 | $200 |
Key Takeaways:
- Power & Versatility: The GBX155 leads with an unmatched 4250 peak amps, designed to jump-start massive engines up to 10L gas and 8L diesel. Competitors like the NOCO GB150 and Boost HD GB70 serve smaller engines and have lower peak amps.
- Charging Speed: Its turbo charge feature is a major advantage, offering full recharge in 2.7 hours and jump-start readiness in just 5 minutes. This is significantly faster than competitors, which typically require over 3 hours.
- USB-C Power Delivery: The Boost X stands out by integrating 60W USB-C PD for powering devices—a feature missing in most competing jump starters. This makes it ideal as an all-in-one emergency power bank.
- Weight & Portability: It is heavier and bulkier than most competitors, which could be a downside for users needing ultra-light portability. However, this weight corresponds with higher capacity and power.
- Price Point: The GBX155 is a premium product priced significantly higher than competitors. While its specs justify the cost for heavy-duty users, casual drivers may find less expensive options sufficient.
- Safety Features: Enhanced UltraSafe 2.0 technology offers superior safety over many rivals, including spark-proof and reverse polarity protections plus improved thermal management.
Who Does It Best Serve?
- Heavy-duty vehicle owners with large gasoline or diesel engines.
- Users needing fast recharging and multi-purpose USB-C charging.
- Those who prioritize safety and want a rugged, reliable jump starter.
Honest Limitations & Flaws of NOCO Boost X GBX155 Jump Starter
While the NOCO Boost X GBX155 excels in many areas, it’s important to highlight some legitimate drawbacks and user concerns to provide a balanced view.
1. Premium Price Tag
At around $370, the GBX155 is significantly more expensive than many competing jump starters. For users with smaller vehicles or occasional jump-start needs, this price may not justify the extra power and features. Budget-conscious buyers might find more affordable models that still get the job done for lighter-duty use.
2. Weight and Bulkiness
Weighing over 7 pounds and with sizeable dimensions, the Boost X is heavier and less compact than many portable jump starters on the market. This could impact ease of storage and portability, especially for users who prefer a smaller emergency kit or need to carry the device for outdoor activities.
3. Mixed Longevity Experiences
Some users report premature battery failures after less than two years, raising questions about long-term durability. While NOCO’s UltraSafe technology is designed to enhance battery life, customer reviews indicate that warranty service can be complicated and costly outside the initial 12-month period, which may be a concern for buyers seeking peace of mind.
4. Limited Warranty Coverage and Repair Costs
NOCO offers a 1-year warranty, but after that, repair fees are steep, sometimes close to or exceeding the cost of buying a new unit. Additionally, the warranty process requires strict adherence to return timelines and may be frustrating for some customers. This limited after-sale support is a notable downside.
5. No App or Smart Connectivity
Unlike some newer jump starters in the market, the Boost X does not feature smartphone app integration or smart diagnostics. For tech-savvy users wanting remote monitoring or detailed usage stats, this could be a missing feature.
Final Verdict & Recommendations
The NOCO Boost X GBX155 stands out as a powerful, reliable, and versatile jump starter designed for serious users who demand extreme jump-starting power combined with modern charging capabilities. With a robust 4250-amp peak current, rapid USB-C recharge, and broad vehicle compatibility, it is an excellent investment for anyone with large engines or multiple vehicle types.
Overall Rating: ⭐⭐⭐⭐☆ (4.3/5)
Who Should Buy This?
- Owners of large gasoline and diesel vehicles (up to 10.0L gas and 8.0L diesel) such as trucks, SUVs, RVs, boats, and tractors.
- Emergency preparedness enthusiasts who want a multi-functional device that also doubles as a powerful USB-C power bank.
- Users valuing safety features like UltraSafe 2.0’s spark-proof design and reverse polarity protection.
- People looking for fast recharge technology to minimize downtime.
- Those who prioritize durability and brand reputation with a USA design and quality components.
Who Should Skip This?
- Buyers on a tight budget who don’t require extreme power or multi-device charging.
- Users wanting the lightest, most compact jump starter for casual or infrequent use.
- Those who want smart features like app connectivity or advanced diagnostics.
- Customers wary of warranty and long-term service limitations.
Best Use Scenarios
- Keeping it in your truck or RV for reliable jumps during cold starts or emergencies.
- Powering USB-C devices on the go during camping or road trips.
- Jump starting diesel trucks or large engines that smaller units can’t handle.
- Owners who prefer a rugged, all-in-one portable power solution.
Value for Money
Though the price is at the higher end of the spectrum, the GBX155 delivers excellent performance, speed, and safety features that justify the investment for users with demanding power needs. For occasional jumpers or smaller vehicles, more budget-friendly options may provide adequate service.
Future-Proofing Considerations
With rapid USB-C Power Delivery and wide compatibility across vehicle types, the Boost X GBX155 is a device that will remain relevant as USB-C becomes the industry standard. However, lack of smart features may make it less future-proof compared to some emerging products.
Decision Framework:
- Buy if:
- You need a jump starter for heavy-duty gasoline or diesel engines.
- You want ultra-fast recharge and multi-device USB-C charging.
- Safety and reliability are your top priorities.
- You prefer a premium, American-designed product.
- Skip if:
- You only need to jump small vehicles occasionally.
- You want the lightest, most compact jump starter available.
- You require smart app integration or advanced monitoring.
- You are concerned about warranty service and repair costs.
- Consider Instead:
- NOCO Boost Plus GB40 for smaller vehicles and lighter use.
- DBPOWER 800A for budget jump starting.
- Clore Automotive Jump-N-Carry for heavy-duty lead-acid options.
Ready to power through any battery emergency with confidence? The NOCO Boost X GBX155 is your ultimate all-in-one solution for jump-starting and portable power — just be prepared to invest in quality and durability.
Frequently Asked Questions (FAQs) about NOCO Boost X GBX155
How powerful is the NOCO Boost X GBX155 jump starter?
The NOCO Boost X GBX155 delivers a peak output of 4250 amps, making it one of the most powerful portable lithium jump starters on the market. It can jump-start gasoline engines up to 10.0 liters and diesel engines up to 8.0 liters, covering a wide range of cars, trucks, SUVs, boats, and heavy equipment.
How fast does the Boost X GBX155 recharge?
Thanks to its USB-C Power Delivery technology, the Boost X GBX155 fully recharges in approximately 2.7 hours from zero. Impressively, it can charge enough in just 5 minutes to perform a jump start, making it extremely convenient for emergency situations.
Can I use the NOCO Boost X GBX155 as a power bank for my devices?
Yes! The device doubles as a 60-watt USB-C power bank, capable of charging phones, tablets, laptops, and other USB-C compatible devices. This versatility makes it ideal for outdoor use or emergency power needs beyond jump starting vehicles.
What safety features does the NOCO Boost X GBX155 have?
The GBX155 features UltraSafe 2.0 technology, including spark-proof design and reverse polarity protection, ensuring safe, mistake-proof operation. Additionally, it has enhanced thermal efficiency and power management for better battery life and reliable performance.
How portable is the NOCO Boost X GBX155? Can I easily carry it around?
Weighing about 7 pounds with dimensions of roughly 8.18″ x 4.84″ x 13.51″, the Boost X GBX155 is portable but designed more for durability and power rather than ultra-lightweight convenience. It comes with a microfiber storage bag for easier handling and protection during transport.
What comes in the box when I buy the NOCO Boost X GBX155?
The package includes the Boost X GBX155 jump starter pack, heavy-duty jumper cable clamps, a USB-C charging cable, a 12V USB-C fast charger, a microfiber storage bag, and a 1-year warranty.
How reliable is the warranty and customer support?
The NOCO Boost X GBX155 comes with a 1-year warranty covering defects. However, some users report that repair fees outside the warranty period can be costly, and the warranty process can be complicated. It’s recommended to register your product and keep your purchase receipt for smooth warranty claims.