NOCO vs GOOLOO Jump Starter: Which Brand Wins for Your Engine?

NOCO vs GOOLOO is the jump-starter argument in one line: the established American brand with the conservative ratings, or the challenger that prints much bigger numbers on a similar-sized box. This comparison puts three NOCO Boost models against three GOOLOO models using only what the makers themselves publish — peak amps, engine-litre ratings, battery capacity, USB output, weight and warranty — plus what owners report. One warning before the tables: peak-amp figures are not measured to a shared standard, so a 4,000A badge does not mean four times the starting power of a 1,000A badge. The jump starter comparisons hub collects the rest of this series, and the portable jump starters category is where every model here lives.

NOCO vs GOOLOO: the quick comparison

Maker figures only. Peak amps are each brand’s own rating and are not measured to a shared standard — compare the engine ratings and battery sizes, not just the biggest number in the left columns.

How to choose between NOCO and GOOLOO

Peak amps vs engine size — read the litres, not the amps

Peak amps are the headline and the least comparable number on the box: there is no shared test standard, and each brand rates its own packs. GOOLOO prints 4,000A on three models; NOCO’s biggest here prints 2,500A. That does not make the GOOLOO packs 60 percent stronger in any proven sense. The engine-litre rating — gas and diesel separately — is the maker putting its name to a job size, and it is the figure the calculator above works from.

Gas vs diesel — diesel always needs the bigger pack

A diesel cranks against far higher compression and, in winter, against glow plugs and thick oil, so every pack here carries a much lower diesel rating than its gas rating: the GB40 falls from 6.0L gas to 3.0L diesel, the GBX75 from 8.5L to 6.5L. If your engine is a diesel, shop on the diesel column only, and treat a rating that exactly equals your engine size as a fair-weather rating, not a January one.

Battery capacity and starts per charge

Capacity buys second and third attempts. NOCO publishes watt-hours cleanly (24 Wh, 31 Wh, 74 Wh) and start counts for the GB40 (up to 20) and GBX75 (up to 12). GOOLOO publishes milliamp-hours (24,000 mAh on the GT models) and claims up to 60 starts for the GT4000S. Bigger is genuinely better for a pack serving two cars or a boat — but a pack kept fully charged beats a bigger pack kept at half, which is why recharge speed matters too.

USB and power-bank features

The GB40 is the last of the old school: one 5V/2.1A USB-A out and micro-USB in. Everything else here is USB-C. The Boost X pair deliver 60W Power Delivery in and out — laptop-class charging. GOOLOO’s GT pair go to 100W two-way and add a 15V/10A DC port for tyre inflators and 12V accessories. If the pack is also your travel power bank, that difference is real; if it lives in a glovebox for emergencies only, it is not worth paying for twice.

Safety protections and the completely-dead-battery problem

Both brands build on the same promise: spark-proof clamps and reverse-polarity protection, so a crossed connection refuses rather than sparks. The subtle difference is the stone-dead case, where a pack cannot even see the battery. NOCO answers with a manual override (hold the button, protections off, use with care); GOOLOO answers with a BOOST mode on its smart clamps. Either works; both demand you read the manual before the night you need them, not during it.

Storage, temperature and the pack you forgot

A jump starter is a battery storing itself, and storage is where these packs quietly die. NOCO rates the GB40’s operating range from -4°F to 122°F. GOOLOO’s GP4000 claims -4°F to 140°F, and the GT4000 pre-heats its cells and claims starts at -40°F. GOOLOO also claims standby measured in years; owners, as the reports below show, are more divided. Whichever brand you buy, a calendar reminder to top it up is part of the purchase — our maintenance checklist habit applies to packs exactly as to winches.

NOCO vs GOOLOO by budget

Types of jump starter: what the split actually is

Every model compared in this guide is from the first row. The other rows are the honest alternatives, and the “Who should NOT buy” section below says plainly when one of them is the better spend. For the wider category, browse the portable jump starters archive.

Detailed reviews: all six packs, one by one

Each block follows the same order — why it earns its place, the maker’s own specifications, who it fits, the honest watch-outs, and what owners report. Ratings quoted are the makers’, written as “rated to”.

Best glovebox classic: NOCO Boost Plus GB40

1,000A — the glovebox classic

Why the NOCO Boost Plus GB40 is our pick

A decade on sale makes the GB40 the reference point every glovebox pack is measured against, and its paper is the most conservative here: NOCO rates it to 6.0L gas and 3.0L diesel from 1,000A and a 24 Wh battery, with up to 20 starts per charge. It earns its place by being the smallest, lightest and most thoroughly documented pack in this guide.

NOCO Boost Plus GB40 key specs

NOCO Boost Plus GB40: fits and best for

Cars and crossovers to 6.0L petrol, small diesels to 3.0L, motorcycles, boats and mowers. It suits a household of ordinary cars, and it is small enough — owners carry it on motorcycles — to actually stay in the vehicle.

NOCO Boost Plus GB40 pros and watch-outs

NOCO Boost Plus GB40: what owners report

NOCO Boost Plus GB40: who should not buy

Skip it for a diesel truck, for laptop fast-charging, or if stone-dead batteries are your usual failure — the NOCO Boost X GBX45 covers more engines with modern charging.

NOCO Boost Plus GB40: pair it with

A maintainer for the vehicle battery itself, so the pack stays an emergency tool rather than a weekly crutch — the habits in our winch battery guide apply unchanged.

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Best NOCO for most drivers: NOCO Boost X GBX45

1,250A — best NOCO for most drivers

Why the NOCO Boost X GBX45 is our pick

The GBX45 is the Boost X formula at its most portable: 1,250A, ratings to 6.5L gas and 4.0L diesel, and USB-C Power Delivery flowing 60W in both directions. NOCO claims a jump-ready charge from empty in about five minutes and a full recharge in roughly 48 minutes on a PD charger. At 1.30 lb it is the lightest pack here.

NOCO Boost X GBX45 key specs

NOCO Boost X GBX45: fits and best for

Mid-size cars, crossovers and SUVs to 6.5L petrol, and diesels to 4.0L — most family diesels included. It fits the driver who wants one small pack covering the household’s cars that can also charge a laptop on a trip.

NOCO Boost X GBX45 pros and watch-outs

NOCO Boost X GBX45: what owners report

NOCO Boost X GBX45: who should not buy

Skip it if your diesel is bigger than 4.0L, or if the pack’s main job is powering devices for days — the GOOLOO GT4000S carries a far bigger battery and 100W output.

NOCO Boost X GBX45: pair it with

A 60W-class USB-C PD wall charger if your home lacks one — the fast-recharge claim only exists with a PD source. Storage habits: our maintenance checklist.

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Best NOCO for trucks and diesel: NOCO Boost X GBX75

2,500A — best NOCO for trucks & diesel

Why the NOCO Boost X GBX75 is our pick

The GBX75 is NOCO’s answer to the truck owner: 2,500A, a 74 Wh battery — the largest NOCO battery here — and ratings to 8.5L gas and 6.5L diesel, covering the 6.6L-class diesel pickups. NOCO claims up to 12 starts per charge through a 60-second timer system, a full recharge in about 1.8 hours, and the 12V fast charger is in the box.

NOCO Boost X GBX75 key specs

NOCO Boost X GBX75: fits and best for

Full-size petrol trucks and SUVs, diesel pickups and SUVs to 6.5L, RVs, boats and tractors. Buy it when the vehicle is heavy, help is far away, and one attempt may not be enough — the 74 Wh battery is sized for repeat cranking.

NOCO Boost X GBX75 pros and watch-outs

NOCO Boost X GBX75: what owners report

NOCO Boost X GBX75: who should not buy

Skip it for a 6.7L Power Stroke-class diesel you must start at -20°F, or for a small car’s glovebox — the GOOLOO GT4000 adds cold pre-heating, and the GBX45 is the NOCO that fits a glovebox.

NOCO Boost X GBX75: pair it with

A hard storage case and a fixed home in the cab rather than the bed — lithium packs hate heat cycles. Our essential accessories guide makes the same storage argument for recovery gear.

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Best value GOOLOO: GOOLOO GP4000

4,000A — best value GOOLOO

Why the GOOLOO GP4000 is our pick

The GP4000 is GOOLOO’s long-running value flagship: a 4,000A badge, maker ratings for all petrol engines and diesels to 10.0L, an 18-month warranty — longer than any NOCO paper here — and a hard EVA case in the box. On sale since 2019, it is thoroughly owner-tested; its charging ports show their age next to the GT pair.

GOOLOO GP4000 key specs

GOOLOO GP4000: fits and best for

Petrol vehicles of any size on paper, and diesels to 10.0L — trucks, RVs, tractors and boats. In practice it fits the buyer covering a mixed fleet — a petrol car, a diesel truck, a mower — without flagship money, and who charges devices by USB-A.

GOOLOO GP4000 pros and watch-outs

GOOLOO GP4000: what owners report

GOOLOO GP4000: who should not buy

Skip it if fast USB-C charging matters, if you want a real charge-state screen, or if your winters are severe — the GOOLOO GT4000 is the GOOLOO built for cold.

GOOLOO GP4000: pair it with

A 12V tyre inflator that runs from its 15V/10A port, kept with the pack in the EVA case. Accessory planning: our essential accessories guide.

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Best GOOLOO all-rounder: GOOLOO GT4000S

4,000A — best GOOLOO all-rounder

Why the GOOLOO GT4000S is our pick

The GT4000S is the GT formula without the arctic specialisation: the same 4,000A badge and 12.0L gas / 10.0L diesel maker ratings, 100W two-way USB-C that recharges the pack in about 1.2 hours, a 3.2-inch screen showing charge and status at a glance, and up to 60 starts per charge on GOOLOO’s claim. It is the GOOLOO most drivers should buy.

GOOLOO GT4000S key specs

GOOLOO GT4000S: fits and best for

Anything with a 12V battery, on the maker’s paper: cars, trucks, RVs, tractors, boats and bikes. It fits the driver whose pack leads a double life — emergency starter in the boot, 100W travel charger on trips.

GOOLOO GT4000S pros and watch-outs

GOOLOO GT4000S: what owners report

GOOLOO GT4000S: who should not buy

Skip it if deep cold is your main enemy — the GOOLOO GT4000 pre-heats its battery for exactly that — or if you want the smallest pack for a normal car, where the GBX45 is lighter.

GOOLOO GT4000S: pair it with

A 100W USB-C car charger turns any drive into a recharge. Keep the top-up on the same schedule as the rest of your kit: maintenance checklist.

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Best for extreme cold: GOOLOO GT4000

4,000A — best for extreme cold

Why the GOOLOO GT4000 is our pick

The GT4000 is the GT4000S’s cold-climate twin, and one headline feature justifies the model: battery pre-heating technology GOOLOO rates for cold starts down to -40°F. Lithium cells lose output as they freeze; a pack that warms its own cells before cranking attacks the exact failure owners report with every other pack here. Around it sits the GT formula: 4,000A, 12.0L gas / 10.0L diesel ratings, 100W two-way charging.

GOOLOO GT4000 key specs

GOOLOO GT4000: fits and best for

Trucks, SUVs and diesels that park outdoors through northern winters, and any vehicle whose dead-battery mornings happen below freezing. It also fits the snowbelt good Samaritan: the driver other people flag down in the car park in February.

GOOLOO GT4000 pros and watch-outs

GOOLOO GT4000: what owners report

GOOLOO GT4000: who should not buy

Skip it in a mild climate, where the GOOLOO GT4000S gives the same ratings plus a screen — and skip every lithium pack here for a 24V truck or a diesel needing minutes of cranking; see Who should NOT buy.

GOOLOO GT4000: pair it with

Insulated storage in the cab, and a routine: bring the pack in for a full charge on the first cold weekend of autumn. Cold-weather battery behaviour: our battery guide.

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Spec comparison: NOCO vs GOOLOO, line by line

Read the table the way the makers wrote it: NOCO publishes watt-hours, exact weights and start counts; GOOLOO publishes bigger ratings and longer warranties but leaves holes — starts per charge on two of three models, a clean weight on the GT4000 — printed here as “Not published” rather than filled from thin air.

Using and jump-starting basics

The sequence is the same for all six packs, and it is deliberately boring. Park out of traffic, engine off, and find the battery — on some cars it hides under a cover or in the boot, with remote jump posts under the bonnet instead. Connect the red clamp to the positive terminal first, then the black clamp to an unpainted engine-bay ground point away from the battery. Switch the pack on and wait for its ready light or screen: NOCO’s Boost X gives you a 60-second window per attempt, and GOOLOO’s smart clamps show their state on the clamp or screen.

Crank in short attempts — a few seconds each — with pauses between them. If the pack cannot see the battery at all, that is the manual-override or BOOST case: protections are off in that mode, so polarity is your responsibility alone. Once the engine runs, remove the black clamp first, then the red, and drive for at least 20–30 minutes. A battery that needed a jump once usually needs one again within days unless the cause — age, a parasitic draw, a failing alternator — is found; our battery-drain explainer walks through draw diagnosis, and the battery guide covers replacement sizing. Recharge the pack the same day.

Safety essentials

Three accessories to keep with whichever pack you buy — each verified for Block 17 on 2026-10-16 and recorded in research-notes.md:

NOCO GBC013 Boost EVA Protection Case — the moulded case NOCO makes for the GB20 and the GB40 in this guide. It keeps the pack, clamps and leads together in the glovebox instead of loose under a seat, where ports and cables take the knocks.

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NOCO GENIUS5 5A battery charger and maintainer — the prevention pick. Left connected to a vehicle that sits, its 6V/12V smart charging keeps the battery full and healthy, so the jump pack stays an emergency tool rather than a weekly routine — the habit behind our winch battery guide.

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Energizer jumper cables, 16-foot, 6-gauge (ENB-616U) — the analogue backup. When a pack is flat, borrowed or beaten by a shorted battery, a donor vehicle and a proper set of cables are still the oldest way home. Keep them in their bag beside the pack.

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How to carry the whole kit full-time — pack, case, cables and a torch that does not depend on the pack’s own charge — is covered in our essential accessories guide.

Troubleshooting: when the pack will not start the car

Who should NOT buy these

Owners of 24V vehicles and heavy plant. Every pack here is a 12V tool. A 24V truck system is outside all six ratings, and no calculator branch above pretends otherwise — you need commercial equipment or a call-out, full stop.

Anyone whose diesel needs long cranking. An old diesel with glow-plug or compression problems can demand minutes of cranking that no lithium glovebox pack is built to give. A traditional lead-acid shop jump box — heavy, replaceable-battery, unglamorous — is the honest tool for that job, and the types table above says why.

Drivers who will never maintain a stored battery. If you know the pack will sit untouched for two years, buy the capacitor type instead, or accept that roadside assistance is your jump starter. A flat lithium pack in the boot is not insurance; it is a souvenir.

Anyone chasing the biggest amp number as a quality signal. Peak amps are not standardised, and buying on that number alone buys marketing. If none of the six fits your engine and habits, the portable jump starters category collects the wider field rather than this comparison forcing a fit.

Final verdict

• Best glovebox classic — NOCO Boost Plus GB40: the glovebox classic for ordinary cars. Check its price
• Best NOCO for most drivers — NOCO Boost X GBX45: the best NOCO for most drivers — light, fast-charging, honest ratings. Check its price
• Best NOCO for trucks and diesel — NOCO Boost X GBX75: the NOCO for trucks and diesels to 6.5L. Check its price
• Best value GOOLOO — GOOLOO GP4000: the value GOOLOO — big paper, long warranty, slow ports. Check its price
• Best GOOLOO all-rounder — GOOLOO GT4000S: the best GOOLOO all-rounder and the strongest power bank here. Check its price
• Best for extreme cold — GOOLOO GT4000: the cold-climate specialist — buy it for the pre-heating. Check its price

Brand verdict, in one breath: NOCO publishes the cleaner paperwork and builds the smaller packs; GOOLOO publishes the bigger ratings, the longer warranties and the one feature — battery pre-heating — that answers the commonest owner complaint in the cold. Pick by engine and winters; the comparison hub holds the head-to-heads that follow.

FAQ

Is GOOLOO as good as NOCO?

On maker paperwork, GOOLOO rates its packs for bigger engines and backs them with longer warranties; NOCO publishes cleaner specifications — watt-hours, exact weights, start counts — and its packs are smaller and lighter. Owners in the threads we reviewed report both brands starting what they claim to start. The difference is philosophy: conservative ratings and polish against maximum paper specification.

Why does a 4,000A GOOLOO not crush a 1,000A NOCO?

Because peak amps are not measured to a shared standard. Each brand rates its own packs, and the figure says little about how long current is sustained. Engine-litre ratings, battery capacity in watt-hours and owner reports are the comparisons that hold up — which is why the calculator in this guide works from litres, not amps.

Which is better for a diesel truck, NOCO or GOOLOO?

On ratings, GOOLOO’s GT pair claim diesels to 10.0L against the GBX75’s 6.5L, and the GT4000 adds battery pre-heating. On published battery size, the GBX75’s 74 Wh is the biggest verified reservoir on the NOCO side. For a 6.6L-class diesel in a mild climate either flagship works; for bigger diesels or real winters, GOOLOO’s paper is stronger.

How long do these packs hold a charge in storage?

GOOLOO claims up to 24 months of standby for the GT pair and advises a top-up roughly every six months; its GP4000 listing advises every 2–3 months. NOCO gives no equivalent headline, and owners in the AR15.com thread report a NOCO needing a top-up every 3–4 months. Plan on a reminder every three months, whichever brand.

Can a jump starter damage a car’s electronics?

Used as directed, the protections on all six packs — spark-proof clamps and reverse-polarity detection — exist precisely to prevent that. The risk case is manual override or BOOST mode, where protections are deliberately off because the battery is too flat to detect. In that mode, polarity is entirely on you.

Will these packs work when the battery is completely dead?

Yes, with the right mode: NOCO’s manual override exists for batteries below 2 volts, and GOOLOO’s smart clamps offer a BOOST mode for extremely low-voltage batteries. Owners report successful starts from fully dead batteries using exactly those modes. A battery with a shorted cell, though, defeats every pack here — that is a replacement, not a jump.

Do jump starters work in extreme cold?

Lithium output falls as temperature drops, and owners across both brands report failures after packs sat in vehicles at around -20°F. Short attempts warm the cells and often succeed on a retry. The GOOLOO GT4000 is the exception designed for this: its battery pre-heating is rated to -40°F. In milder cold, bringing any pack indoors overnight achieves much the same.

How many jump starts should I expect per charge?

Maker claims here run from up to 12 (NOCO GBX75) and up to 20 (GB40) to up to 60 (GOOLOO GT4000S). Real counts depend on engine size, battery condition and temperature — a big diesel on a cold morning can spend in two attempts what a warm petrol car spends in ten. Treat the claims as best-case comparisons, not quotas.

NOCO or GOOLOO for a motorcycle?

The smallest pack that covers the bike: owners on HDForums carry the GB40 on motorcycles as well as in cars. Any of the six will start a bike; the decision is luggage space. The GB40 and GBX45 are the only two here that genuinely disappear into bike luggage.

What if neither brand fits my vehicle?

Then the honest answer is outside this comparison: 24V systems need commercial equipment, and diesels needing long cranking are better served by a lead-acid shop jump box. The types table above lays out those alternatives, and our portable jump starters category tracks the wider market.

Sources & changelog

Manufacturer sources: NOCO GB40 listing and maker chart; NOCO GB40 sell sheet (specifications); NOCO GBX45 listing; NOCO GBX45 specification sheet; NOCO GBX75 listing; NOCO GBX75 user manual; GOOLOO GP4000 listing; GOOLOO GT4000S listing; GOOLOO GT4000S maker page; GOOLOO GT4000 listing.

Owner sources: AR15.com — Jump starter verdict: GOOLOO or NOCO?; BobIsTheOilGuy — High Performance jumper starters; Bogleheads — Recommend a portable car battery booster pack?; HDForums — Which battery jump starter would you recommend?; AutoGuide — The best portable car jump starters (garage notes).

Changelog — October 15, 2026: guide first published.

Related guides

• Portable jump starters — the full category
• Jump starter comparisons — every head-to-head
• Best winch battery — 12V battery care and sizing
• Do winches drain battery? Parasitic draw explained
• How long will a winch run on a battery?
• Winch maintenance checklist — the top-up habit
• Essential winching accessories
• About WinchInsider