Head-to-head · Best Portable Jump Starters

NOCO Boost Plus GB40 vs NOCO Boost X GBX55

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

NOCO Boost Plus GB40 comes out ahead by a narrow margin (4.7 vs 4.5). The gap is mostly about everyday drivers of sedans, SUVs and small trucks who want a proven, glovebox-sized jump starter near $100 — read the strengths below before deciding.

Higher ratedRanked #1 in Best Portable Jump Starters

NOCO Boost Plus GB40

4.7

$99.95as of Jun 7

The Boost Plus GB40 is the default recommendation for most drivers: 1000A is plenty for the engines in the average driveway, the price stays near $100, and NOCO's safety engineering is the most proven in the category. Step up to the GB70 or GBX55 only if you run a large diesel or want USB-C fast charging.

Strengths

— 1000A peak output starts virtually any passenger car, SUV or light truck (up to 6.0L gas / 3.0L diesel)
— Tiny 8-inch, 2.4 lb body fits a glovebox yet holds roughly 20 jumps per charge
— UltraSafe spark-proof clamps with reverse-polarity protection prevent the classic jump-start mishaps

Watch-outs

— Underpowered for large V8 diesels and big trucks that need the GB70 or GBX55
— Slow micro-USB recharge with no USB-C input on this generation
— Lithium cells need topping up every few months in storage to stay jump-ready

$99.95 · Check Price on Amazon Full review →

Ranked #4 in Best Portable Jump Starters

NOCO Boost X GBX55

4.5

$166.2as of Jun 7

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.

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

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

$166.2 · Check Price on Amazon Full review →

How they stack up

NOCO Boost Plus GB40

The most compact and affordable pick here. It is outpowered by the 2000A NOCO Boost HD GB70, the 1750A USB-C NOCO Boost X GBX55, and the 4000A WOLFBOX MegaVolt24, but it costs less than all of them and covers the engines most drivers actually own. Only the GOOLOO GP2000 undercuts it on price.

NOCO Boost X GBX55

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.

Specs side-by-side

Spec	NOCO Boost Plus GB40	NOCO Boost X GBX55
Peak Amps	1000A	1750A
Engine Capacity	6.0L gas / 3.0L diesel	7.5L gas / 5.0L diesel
Battery	UltraSafe lithium-ion	UltraSafe lithium-ion
USB Output	USB-A 2.1A	60W USB-C PD (in/out)
Weight	2.4 lb	3.37 lb
Jumps Per Charge	~20	—
Flashlight	7-mode LED	Integrated LED
Warranty	1-year	1-year
Recharge Time	—	1.2 hours

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