NOCO Boost X GBX155 Review
4,250 amps for big diesels, plow trucks, and RVs — with 65W USB-C charging that makes it a serious power bank too.
The verdict
The GBX155 is overkill for a sedan and exactly right for a 6.7L diesel pickup at -20°F, a tractor, a boat with twin engines, or a fleet truck that sits outside. It cranks engines that stall out a GB70, recharges in a couple of hours over USB-C PD, and can fast-charge a laptop from the same port. It's expensive and heavy; buy it because you need the rating, not as a luxury GB70.
$369.95on Amazon
Price as of Aug 23, 1:20 AM ET — subject to change.
What we like
- +4,250A rating covers gas up to 10.0L and diesel up to 8.0L — heavy-duty pickups, RVs, farm equipment
- +65W USB-C in and out: recharges the pack in a few hours and fast-charges laptops and phones
- +500-lumen flashlight; rubberized IP65 housing with the same UltraSafe clamp protection as the rest of the line
- +Heavy-gauge clamps and leads that actually fit big truck battery posts
- +Holds charge for months; practical for fleet and farm use
What to know
- −~7.5 lb — this lives under a seat or in a toolbox, not a glovebox
- −Priced like a budget battery charger and a GB40 combined
- −No 12V accessory output on this model
- −Still lithium: keep it in the cab in real cold so the pack itself is warm
Full review
The gap between a 2,000A pack and this one isn't subtle. A 6.7L Power Stroke or 6.6L Duramax at -15°F with a tired battery pair needs a lot of current for a few seconds, and the GBX155 delivers it with margin — owners of heavy pickups and ag equipment report first-crank starts where a GB70 would need two or three attempts. The clamps are heavier too, which sounds trivial until you're trying to get a good bite on a top-post battery buried under a diesel's intake plumbing.
The other thing that makes the GBX155 feel like a generation newer than the GB70 is the USB-C port. 65W power delivery in both directions means a full recharge takes a couple of hours instead of most of a day, and the same port will run a laptop or fast-charge a phone — useful for a contractor or anyone who spends a winter day working out of the truck. The 500-lumen light is a legitimate work light.
Who shouldn't buy it: anyone with a gas car under 6.0L, because it's three times the price and three times the weight of the GB40 that would serve them identically. And note what it lacks — there's no 12V barrel output for an inflator on this model. For the big-engine, deep-cold, sits-outside crowd, though, this is the pack to own.
Best for: Diesel pickups, plow trucks, RVs, and boats — anything with a big engine in a place that gets brutally cold.
Specifications
| Peak amps | 4,250A |
|---|---|
| Engine rating | Gas up to 10.0L / diesel up to 8.0L |
| Battery | Lithium-ion, 12V systems only |
| Ports | USB-C PD 65W in/out, USB-A out |
| Flashlight | 500 lumens, multi-mode incl. SOS |
| Safety | Spark-proof, reverse polarity, over-charge, short-circuit; manual override |
| Operating temp | -4°F to 122°F (-20°C to 50°C) |
| Ingress rating | IP65 |
| Weight | ~7.5 lb |
| Warranty | 1 year |
Ready to get one?
We earn a small commission at no extra cost to you — it's how we keep the reviews independent.
$369.95on Amazon
Price as of Aug 23, 1:20 AM ET — subject to change.
Head-to-head comparisons
Alternatives in Jump Starters
Best Overall
NOCO Boost HD GB70
2,000 amps, rated for V8 gas and 6.0L diesel, with the safest clamps in the business — the one jump starter that covers almost every driveway.
Best Value
NOCO Boost Plus GB40
The best-selling jump starter in the world for good reason — 1,000A, glovebox-sized, and it starts every four- and six-cylinder car on the road.
Budget Pick
GOOLOO GP4000
A lot of cranking power and a big power bank for the money — the best of the budget packs, if you understand what the '4,000A' means.