NOCO GB40 vs GOOLOO GP4000: Which Jump Starter Should You Buy?
The short answer: The GOOLOO GP4000 wins on raw power and value — it delivers 4,000 amps, handles 10.0L diesel engines, and costs less than the NOCO GB40. But if you drive a standard car or SUV and want the most trusted, weather-resistant jump starter money can buy, the NOCO GB40 is worth every penny. Buy NOCO if you value build quality and brand trust. Buy GOOLOO if you need more power for a truck or diesel — or just want to save some money.
You’re standing in a dark parking lot. Your truck won’t start. You’ve got a jump starter in the back — but is it actually strong enough to get the job done?
That’s the question this comparison answers. I’m Alex Rahman, and I’ve tested and researched portable jump starters for years. The NOCO GB40 and GOOLOO GP4000 sit at the top of most buyers’ shortlists — and they look similar on paper. But they’re built for different drivers. Let me break down exactly who should buy which one.
- The GOOLOO GP4000 is the overall value winner — 4,000A of peak power for around $90, and it handles 10.0L diesel engines.
- The NOCO GB40 is the premium pick — IP65-rated, built by a 100-year-old US company, with a proven UltraSafe system that won’t spark or misfire.
- For small to mid-size gas vehicles, the NOCO GB40 is more than enough and incredibly reliable.
- For trucks, large SUVs, diesel engines, or fleet use, the GOOLOO GP4000 wins on power and cost per jump.
- The key difference: NOCO gives you 20 jump starts per charge; GOOLOO gives you 60+ — a huge advantage for commercial use.
| Category | NOCO GB40 | GOOLOO GP4000 |
|---|---|---|
| Overall Winner | — | 🏆 |
| Best Value | ❌ | ✅ |
| Best Performance | ❌ | ✅ |
| Best For Beginners | ✅ | ✅ |
| Best for Cold Weather / Diesel | ❌ | ✅ |
Product Overview: NOCO Boost GB40
| ✅ Best for | Drivers of everyday cars, SUVs, and motorcycles who want the most trusted, weather-resistant jump starter available |
| ❌ Not ideal for | Diesel trucks over 3.0L or anyone who needs more than 20 jump starts per charge — consider the NOCO GB70 or GOOLOO GP4000 instead |
| 💰 Price | ~$109 (check for latest price) |
The NOCO GB40 is the gold standard for compact lithium jump starters. It delivers 1,000 amps of starting power from a unit that weighs just 2.4 pounds. That’s remarkable for what it does.
It starts gas engines up to 6.0L and diesel engines up to 3.0L. That covers the vast majority of passenger cars, small trucks, motorcycles, ATVs, and boats. NOCO’s UltraSafe Technology is the standout feature — it uses patented spark-proof connections and reverse polarity protection. You literally cannot connect it wrong. The clamps won’t activate unless they detect a safe, properly connected battery.
The IP65-rated enclosure means it’s sealed against dust and water splashes. The rubberized casing takes drops without cracking. One Amazon reviewer put it simply: they’d had their truck sitting dead for two weeks, tried traditional jumper cables with no luck, and the GB40 started it first try. That’s real-world proof of what UltraSafe delivers.
It also doubles as a USB power bank and includes a 100-lumen LED flashlight with seven modes — including SOS and emergency strobe. Recharge time is just three hours. It’s genuinely one of the most polished jump starters ever made.
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables
The right pick for anyone driving a gas-powered car, SUV, or motorcycle who wants the most trusted, foolproof jump starter on the market.
Product Overview: GOOLOO GP4000
| ✅ Best for | Truck owners, diesel drivers, fleet managers, and anyone who needs maximum jump-starting power at a budget-friendly price |
| ❌ Not ideal for | Buyers who want an IP-rated weatherproof unit or need the proven brand reliability of NOCO for high-stakes environments |
| 💰 Price | ~$90 (check for latest price) |
The GOOLOO GP4000 is a powerhouse. It punches out 4,000 amps of peak current and handles all gas engines plus diesel engines up to 10.0L. That covers virtually every vehicle on the road — including semi-trucks, tractors, RVs, and heavy-duty diesel pickups.
What really stands out is the capacity. The GP4000 packs a 24,000mAh lithium polymer battery. That means 60+ jump starts on a single charge. For a fleet manager with 10 vehicles, that’s a game-changer. You won’t be recharging between every vehicle.
It also includes a BOOST button — GOOLOO’s name for its manual override mode. Press it, and the unit forces current into even a deeply discharged battery that standard mode can’t detect. That’s incredibly useful when you find a battery that’s been dead for weeks. It also operates in temperatures as low as -4°F (-20°C), which matters in harsh winters.
The GP4000 weighs just 1.81 pounds — actually lighter than the NOCO GB40. It ships with dual USB ports and a USB-C port for device charging. One Amazon buyer described using it to jump-start a truck at least 10 times in a row on a badly sulfated battery — and the GP4000 never failed.
GOOLOO GP4000 Jump Starter 4000A, 12V Portable Car Battery Jump Starter with Smart Jumper Cables
The right pick for truck owners, diesel drivers, and anyone who needs serious starting power at an honest price.
Full Spec Comparison: NOCO GB40 vs GOOLOO GP4000
| Spec | NOCO GB40 | GOOLOO GP4000 | Winner |
|---|---|---|---|
| Peak Current | 1,000A | 4,000A | GOOLOO |
| Engine Capacity (Gas) | Up to 6.0L | All Gas Engines | GOOLOO |
| Engine Capacity (Diesel) | Up to 3.0L | Up to 10.0L | GOOLOO |
| Battery Capacity | 24Wh (~6,500mAh) | 24,000mAh | GOOLOO |
| Jump Starts Per Charge | Up to 20 | 60+ | GOOLOO |
| Weight | 2.4 lbs | 1.81 lbs | GOOLOO |
| LED Flashlight | 100 lumens, 7 modes | Built-in, 3 modes | NOCO |
| Built-in Voltmeter | No | No (LED indicator only) | Tie |
| IP Rating | IP65 | None listed | NOCO |
| Operating Temp (Low) | Not officially stated | -4°F (-20°C) | GOOLOO |
| Charging Time (Standard) | ~3 hours | ~5 hours | NOCO |
| BOOST / Manual Override | No | Yes | GOOLOO |
| USB Ports | 1x USB-C | 2x USB-A + 1x USB-C | GOOLOO |
| Price (Current) | ~$109 | ~$90 | GOOLOO |
| Warranty | 1 year | 18 months | GOOLOO |
Raw Starting Power: NOCO GB40 vs GOOLOO GP4000
The GOOLOO GP4000 wins this category — and it’s not close. It delivers 4,000 amps of peak current versus 1,000 amps from the NOCO GB40. That’s four times the rated power.
Now, here’s what that number actually means in practice. Peak amps are a marketing metric, and both products often start vehicles well below their rated peak. But higher peak current does give you more reserve when a battery is severely discharged, very cold, or unusually large.
The NOCO GB40 handles gas engines up to 6.0L and diesel up to 3.0L. That works perfectly for a Honda Accord, Toyota Camry, Ford Ranger, or most motorcycles. But the moment you need to jump a 5.7L Hemi RAM 1500 diesel or a 6.7L Powerstroke F-250, the GB40 can’t do it. The GOOLOO GP4000 handles all of those and more — up to a 10.0L diesel.
For fleet mechanics or commercial drivers, the 60+ starts per charge on the GP4000 is also a huge advantage. The NOCO tops out at 20. If you’re jumping multiple vehicles in a day, you’ll be recharging the NOCO constantly.
GOOLOO GP4000 wins on power. Four times the rated amps, three times the jump starts per charge, and compatibility with every engine size on the market. The NOCO GB40 is plenty for everyday cars — but it hits its ceiling fast.
Portability, Design & Build Quality: NOCO GB40 vs GOOLOO GP4000
The NOCO GB40 wins on build quality. It’s a premium product through and through. The IP65 rating means it’s fully dust-tight and protected against water jets. Drop it. Get it wet. Leave it in the rain. It holds up.
The rubberized over-molded casing is a nice touch too. It won’t scratch your car’s interior panels when you toss it in the back seat. The 100-lumen flashlight with seven modes — including a dedicated SOS strobe — is also more versatile than the basic flashlight on the GOOLOO.
Here’s the surprise: the GOOLOO GP4000 is actually lighter. At 1.81 lbs, it’s about half a pound lighter than the NOCO. So if you’re judging pure portability by weight, GOOLOO edges it. But “build quality” and “durability” are different from “weight.” The NOCO feels more solid, more protected, and more weather-ready.
The GOOLOO GP4000 has hardened plastic and rubber corners, which helps with drops. But it has no official IP rating. Don’t expect it to survive a serious soaking or heavy exposure to road grime the way the NOCO does.
If you want a jump starter that lives in your glove box year-round through rain, dust, and everything else — the NOCO GB40 is the tougher choice. For garage storage or a dry truck cab, the GOOLOO holds up just fine.
Price & Value: Which One Is Worth Your Money?
The GOOLOO GP4000 wins on value — decisively. You’re getting four times the peak power for roughly $20 less than the NOCO GB40 at typical street prices.
At ~$90 for the GOOLOO vs ~$109 for the NOCO, the price gap isn’t massive. But when you factor in what each gives you — 60+ starts vs 20, 4,000A vs 1,000A, 10.0L diesel capability vs 3.0L — the value math heavily favors the GOOLOO.
The NOCO GB40 commands a premium for two things: brand trust and build quality. NOCO has been in the battery business since 1914. Their UltraSafe system is patented. The IP65 certification is real and tested. You pay more for those assurances — and for many buyers, that’s worth it.
But if you’re looking at performance-per-dollar, the GOOLOO GP4000 wins. It’s the better deal for most drivers.
The GOOLOO GP4000 regularly goes on sale during Prime Day and Black Friday — dropping as low as $80. Set a price alert if you’re not in a rush. The NOCO GB40 also discounts occasionally but less aggressively.
Safety Features, BOOST Mode & Real-World Reliability
Both units have spark-proof clamps and reverse polarity protection. Neither will send current through the cables unless properly connected. That’s the baseline for modern jump starters, and both pass.
The NOCO GB40 goes further with its UltraSafe system. It actively detects battery state before allowing any current to flow. If the battery is below a safe detection threshold, the GB40 simply won’t activate. This protects you and the battery from dangerous surge conditions.
The GOOLOO GP4000 has 10 declared safety protections — over-current, overload, over-voltage, overcharge, short-circuit, and more. For most situations, this is robust protection. But the BOOST button changes things.
The GOOLOO GP4000’s BOOST button forces current into a battery that the unit cannot detect through normal operation. This bypasses the protection system. It’s useful in genuine emergencies — but using BOOST repeatedly or on incompatible batteries can damage the vehicle’s electrical system or the jump starter itself. Use BOOST only when normal mode has failed, connect clamps carefully, and never hold it for more than a few seconds at a time.
On cable length: several Amazon reviewers note that the NOCO GB40’s cables can feel short on larger trucks and SUVs. The clamps barely reach both battery terminals on some full-size pickups. The GOOLOO GP4000 has similar cable length feedback but slightly longer cables on the smart clamp design.
The NOCO GB40’s IP65 rating is also a safety-adjacent feature. In wet conditions — a flooded road, heavy rain, working in a puddle — the NOCO protects the internal electronics. The GOOLOO has no such certification. Don’t use it in heavy rain or near standing water.
For more on lithium battery safety standards in consumer products, the U.S. Consumer Product Safety Commission (CPSC) maintains guidance on lithium battery safety testing standards, including UL 1642 and UL 2743 for portable power packs — the standards that well-made jump starters like these are tested against.
NOCO GB40 wins on pure safety engineering — IP65, UltraSafe clamps, and no manual override risk. GOOLOO GP4000 offers more safety modes on paper, but the BOOST button adds a layer of responsibility the NOCO doesn’t require.
Real-World Use Cases: Which One Wins?
- Dead battery on a Toyota Camry (2.5L gas): NOCO GB40 wins. It’s more than enough power, and the UltraSafe system makes it foolproof for beginners.
- Dead battery on a Ford F-250 diesel (6.7L): GOOLOO GP4000 wins. The NOCO GB40 can’t even attempt this — it’s rated for 3.0L diesel max.
- Fleet mechanic jumping 8–10 vehicles per day: GOOLOO GP4000 wins. 60+ starts per charge eliminates constant recharging. Cost per jump is far lower.
- Winter morning start in -10°F Minnesota: GOOLOO GP4000 edges it. The GP4000’s rated operating range extends to -4°F and the BOOST mode can force-start batteries that have gone deeply dead from the cold.
- Solo female driver, peace-of-mind kit in the glove box: NOCO GB40 wins. The UltraSafe clamps mean you literally cannot connect it wrong. IP65 means it survives any conditions. Simple, trusted, compact.
- Weekend motorcyclist or boater: NOCO GB40 wins. Compact, weather-resistant, and more than enough for small engines. The IP65 seal matters near water.
Who Should Buy the NOCO GB40?
- You drive a standard gas-powered car, SUV, or small truck (under 6.0L).
- You want the safest, most mistake-proof jump starter available — especially if you’re not mechanically inclined.
- You need weather resistance — IP65 matters if you work outdoors, near water, or in wet climates.
- You value brand heritage and long-term reliability over raw power specs.
- You only need to jump one or two vehicles and won’t need more than 20 starts between charges.
Who Should Buy the GOOLOO GP4000?
- You drive a diesel truck, heavy-duty pickup, RV, or any vehicle over 6.0L.
- You want maximum power at a lower price — the GP4000 delivers 4x the peak amps for less money.
- You manage a fleet or need 60+ starts per charge without constant recharging.
- You live somewhere with harsh winters where deeply discharged batteries are common — and BOOST mode matters.
- You want a longer warranty (18 months vs 12 months) and more USB ports for device charging.
Who Should NOT Buy Either One?
- If you have a gas engine over 8.5L or commercial diesel over 10.0L, neither unit covers you — look at the NOCO GB150 (3,000A) or a heavy-duty battery maintainer instead.
- If budget is your only concern and you just need something basic for a small car, the HULKMAN Alpha45S (~$50) covers engines up to 7.0L gas at a much lower price point.
- If you want a jump starter with a built-in air compressor, consider the GOOLOO GP4000 + AP150 Pro bundle or the NOCO GBX55 — a separate compressor-integrated unit.
How to Maintain Your Jump Starter
A jump starter you never maintain is a jump starter that fails you when you need it most. Two minutes of care per month keeps it ready all year long.
Charge your jump starter at least once a month, even if you haven’t used it. Lithium batteries — both lithium-ion and lithium polymer — lose charge in storage. A unit that’s been sitting for three months may not have enough power left to crank your engine.
Store it away from extreme heat. Temperatures above 104°F (40°C) degrade lithium battery cells permanently. Don’t leave your jump starter in a hot car during summer. A glove box in direct sunlight can easily reach 140°F. The GOOLOO explicitly warns against this in its documentation.
Never let the battery drain completely and sit for months. A deep discharge followed by long storage permanently reduces capacity. If the battery indicator shows low charge, plug it in before putting it away.
Don’t rely on the GOOLOO’s BOOST button as a regular starting method. It bypasses the protection circuit designed to prevent overloading. Using BOOST repeatedly — especially on large or incompatible batteries — can shorten the unit’s lifespan or cause electrical damage to your vehicle. Use it only when the normal mode fails, and treat it as a last resort.
After heavy use jumping large engines, plug the unit back in as soon as possible. Don’t store a deeply depleted unit for more than a few days. Prompt recharging protects the cells and ensures the unit is ready for the next emergency.
For more guidance on safely disposing of or recycling lithium batteries at end of life, the CPSC battery safety page provides useful consumer guidance on proper handling and disposal of lithium-ion battery products.
Final Verdict
The GOOLOO GP4000 is the better buy for most drivers. It delivers four times the power at a lower price, handles diesel engines up to 10.0L, and gives you 60+ starts per charge. For truck owners, diesel drivers, and fleet operators, it’s not even a close call.
But the NOCO GB40 is the right pick if reliability, weather resistance, and brand trust matter more than raw power. If you drive a standard car or SUV and want a jump starter you can trust completely — including in rain and mud — the NOCO’s IP65 build and UltraSafe technology justify the price.
Buy the NOCO GB40 if your vehicle has a gas engine under 6.0L and you want the safest, most foolproof option. Buy the GOOLOO GP4000 if you need more power, have a diesel, or want a better value. Both are excellent — the right answer comes down to your vehicle and how you’ll use it. I’m Alex Rahman, and whichever you choose, either will outperform traditional jumper cables in every situation.
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
The premium choice for everyday cars and SUVs — safe, reliable, and built to last.
GOOLOO GP4000 Jump Starter 4000A — 12V Portable Car Battery Jump Starter
The power and value pick for trucks, diesel engines, and drivers who need more starts per charge.
Frequently Asked Questions
Which is better — the NOCO GB40 or the GOOLOO GP4000?
The GOOLOO GP4000 is better on power and value, with 4,000A peak current and 60+ starts per charge. The NOCO GB40 is better on build quality and safety, with IP65 weather sealing and patented UltraSafe clamps. Choose NOCO for everyday cars and safety-first use; choose GOOLOO for trucks, diesel, or fleet use.
What is the difference between the NOCO GB40 and GOOLOO GP4000?
The biggest differences are peak power (1,000A vs 4,000A), diesel engine coverage (3.0L vs 10.0L), and jump starts per charge (20 vs 60+). The NOCO GB40 has an official IP65 weather-resistance rating; the GOOLOO GP4000 does not. The GOOLOO also includes a BOOST button for manually overriding the safety system on deeply dead batteries.
Is the NOCO GB40 worth the extra money over the GOOLOO GP4000?
If you drive a standard gas-powered car and want the safest, most weatherproof jump starter available, yes — the NOCO GB40 is worth the extra ~$20. If you need more power, drive a diesel, or want better value, the GOOLOO GP4000 is the smarter buy. The NOCO’s IP65 seal and 100-year brand heritage are real advantages for specific users.
Does the GOOLOO GP4000 work in cold weather?
Yes. The GP4000 is rated to operate down to -4°F (-20°C). Its BOOST mode also helps force-start batteries that have discharged deeply due to cold. For most cold-weather jump-starting scenarios, the GP4000 handles it well — especially on diesel trucks where cold starts are most demanding.
How many times can the GOOLOO GP4000 jump start a car before recharging?
GOOLOO rates the GP4000 at 60+ jump starts on a single charge. Real-world performance varies depending on engine size and battery condition, but users routinely report 40–60+ starts before needing to recharge. The NOCO GB40, by comparison, is rated for up to 20 starts per charge.
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I’m Alex Rahman, a car enthusiast and automotive writer focused on practical solutions, car tools, and real-world driving advice. I share simple and honest content to help everyday drivers make better decisions.