The Boost X GBX55 is NOCO's USB-C generation: 1750A handles most large gas and mid-size diesel engines, and the 60W USB-C port makes it the most charging-versatile NOCO unit here, topping off laptops and reaching jump-ready in five minutes. It is the pick for road-trippers who value fast recharge and device power over raw peak amps.
Full review
Real-World Performance
BatteryEssence gave the GBX55 a perfect 5 out of 5, reporting that 'the 1750-amp power is no joke; it started my truck's large V8 engine instantly and without hesitation.' AutoMedian backed that up with a 4.7-out-of-5 score after starting 'a 6.2L V8 Ford F-150 with a completely dead battery in 17 degree weather, with no issues.' Two cold-start V8 successes from independent reviewers is strong evidence that the 1750A rating holds up under exactly the conditions that defeat weaker units.
The 1750A peak covers gas engines up to 7.5 liters and diesels up to 5.0 liters, slotting it neatly between the GB40 and the GB70 in cranking power. In practice that range covers the overwhelming majority of trucks and SUVs while keeping the unit compact and easy to handle. Reviewers consistently note confident cold-weather starts and quick clamp connections, and the smart safety circuitry means even an inexperienced user is unlikely to make a damaging mistake. For most buyers shopping above the entry-level GB40, the GBX55 hits the sweet spot of enough power without the GB70's bulk.
Setup and Charging
The GBX55's defining feature is its 60W USB-C Power Delivery port, which works for both input and output. NOCO claims a full recharge in 1.2 hours and a jump-ready state after just five minutes of charging, both dramatically faster than the micro-USB GB40 and GB70, and a genuine advantage if you discover a flat unit right when you need it. BatteryEssence confirmed the fast recharge, noting the '1.2-hour full recharge via USB-C is a big improvement and worked just like a wall charger.'
AutoMedian highlighted that the '60W USB-C output powers laptops and other high-demand devices, which many jump starters lack.' That makes the GBX55 the most travel-friendly NOCO unit: you can refill it from a USB-C wall charger, a car adapter or even a power bank, and use it to keep a laptop or tablet running on a long drive or campsite. The older NOCO units simply do not have these capabilities, and it is the single biggest reason to choose the GBX55 over the cheaper GB40 if charging flexibility matters to you.
Build Quality and Design
The GBX55 inherits NOCO's UltraSafe design with spark-proof clamps and reverse-polarity protection, and BatteryEssence noted 'the build feels solid, not cheap. The heavy-duty clamps are easy to handle.' The redesigned Boost X chassis is more angular and modern than the older Boost line, with a clearer status display and a more ergonomic grip.
At about 3.37 pounds it is heavier than the GB40 but still compact enough to keep in a vehicle full-time. Reviewers generally rate the fit and finish highly, consistent with NOCO's reputation for build quality, and the clamps inspire more confidence than the budget competition. A minority of owners flag that the integrated cables are a touch short for deeply recessed batteries, the same complaint that follows most compact NOCO units, but it is rarely a dealbreaker in practice.
Where It Falls Short
The GBX55's biggest knock is mixed long-term reliability feedback: while professional reviews are glowing, a subset of owners report battery longevity issues and a handful of units failing within the first year. That variance is worth weighing against NOCO's otherwise strong reputation, and it argues for keeping the unit on a regular charge schedule and registering the warranty.
It also occupies an awkward price slot, often costing about the same as the far higher-capacity WOLFBOX MegaVolt24, which out-specs it on peak amps and reserve while matching its USB-C convenience. For the heaviest diesels and the largest cold-cranking demands, the 2000A GB70 has more headroom. And cable length is a minor recurring complaint. None of these undercut the GBX55's core appeal, but they mean it is not the automatic choice at its price.
Value at This Price
Home Depot reviewers frame the value well, calling it 'premium-class output, charging versatility, and safety, often found in $200+ units, at a sub-$160 price point.' The GBX55 justifies its price for buyers who specifically want NOCO's safety pedigree plus modern USB-C charging in one compact package, a combination the older NOCO units cannot offer.
If raw capacity and peak amps per dollar are the priority, the WOLFBOX MegaVolt24 is the stronger buy at similar money, and budget shoppers will look at the GB40 or GP2000. But if proven NOCO reliability, fast USB-C recharge and laptop-charging capability in a small unit are what you want, the GBX55 earns its place. It is the NOCO unit to buy when you want the brand's safety engineering brought into the USB-C era without stepping up to the heavier GB70.
Who It's Best For
Pick the GBX55 if you take road trips or camp and want a jump starter that recharges fast over USB-C and can also power a laptop, all with NOCO's safety engineering behind it. It is the best NOCO unit for people who hate slow micro-USB charging and want one device that handles both jumping and device power on the move.
Choose the GB70 instead if you need maximum cranking reserve for a big diesel or a multi-vehicle workload, the GB40 if you want the smallest, cheapest option for an ordinary car, or the WOLFBOX MegaVolt24 if you want more raw power and battery capacity for similar money. The GBX55 is the balanced, modern, travel-oriented pick in the NOCO line, and for the road-tripper it is the most sensible of the three.
How It Compares to Alternatives
The GBX55 carves out the middle of the NOCO line and the charging-versatility niche of this whole group. Against the NOCO Boost Plus GB40 it offers more cranking power and, decisively, modern USB-C charging the GB40 lacks. Against the NOCO Boost HD GB70 it trades some reserve capacity and rugged cabling for faster recharge, lighter weight and laptop-charging capability, a worthwhile swap for travelers but not for big-diesel owners.
Its toughest competition is the WOLFBOX MegaVolt24, which matches the GBX55's USB-C convenience while far exceeding it on peak amps, battery capacity and warranty, often at the same price. On a pure capability-per-dollar basis the MegaVolt24 wins that matchup; the GBX55's case rests on NOCO's longer reliability record and more compact form. The GOOLOO GP2000 competes only on price. The GBX55 is the unit to pick when you specifically want NOCO safety engineering plus USB-C in a travel-friendly size.
Strengths
- +1750A peak starts up to 7.5L gas and 5.0L diesel engines
- +60W USB-C Power Delivery charges in and out, and reaches jump-ready in five minutes of charge
- +Full recharge in just 1.2 hours, far faster than micro-USB NOCO units
- +Can power laptops and other high-demand USB-C devices that most jump starters cannot
- +UltraSafe spark-proof clamps and reverse-polarity protection carry over from the NOCO line
Watch-outs
- −Mixed user reports of battery longevity and a few early failures
- −Costs about the same as the more powerful WOLFBOX MegaVolt24
- −Clamp cable length is on the shorter side for some engine bays
- −Less cranking reserve than the GB70 for the heaviest diesels
How it compares
The charging-versatility pick. Its 60W USB-C recharge and device-power output beat the micro-USB NOCO Boost Plus GB40 and NOCO Boost HD GB70, and match the WOLFBOX MegaVolt24, while its 1750A peak sits between the GB40 and GB70 and above the GOOLOO GP2000 on engine range.
Who this is for
At a glance: road-trippers and campers who want fast USB-C recharge and the ability to charge laptops as well as jump cars.
Why you’d buy the NOCO Boost X GBX55
- 1750A peak starts up to 7.5L gas and 5.0L diesel engines.
- 60W USB-C Power Delivery charges in and out, and reaches jump-ready in five minutes of charge.
- Full recharge in just 1.2 hours, far faster than micro-USB NOCO units.
Why you’d skip it
- Mixed user reports of battery longevity and a few early failures.
- Costs about the same as the more powerful WOLFBOX MegaVolt24.
- Clamp cable length is on the shorter side for some engine bays.
Rating sources
“The 1750-amp power is no joke; it started my truck's large V8 engine instantly and without hesitation.”
“It started a 6.2L V8 Ford F-150 with a completely dead battery in 17 degree weather, with no issues.”
“Premium-class output, charging versatility, and safety, often found in $200+ units, at a sub-$160 price point.”
Our 4.5 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
