Gooloo GP4000 Review: Worth It? (November 2026)
The Gooloo GP4000 suits drivers who want a jump starter for larger 12V engines plus backup power for small devices. Choose another Gooloo model if fast recharging, a built-in tire inflator or lower weight matters more.
On this page (9 sections)
- What does the Gooloo GP4000 offer?
- How does the Gooloo GP4000 compare with other Gooloo models?
- How do you confirm the GP4000 fits your vehicle?
- What should you do before storing the GP4000 in your car?
- How should you use the GP4000 and its BOOST button?
- Can the GP4000 replace a power bank or battery charger?
- How should you care for the GP4000 in cold weather and storage?
- Which mistakes should GP4000 buyers avoid?
- Should you buy the Gooloo GP4000 or another model?
The Gooloo GP4000 is a useful choice for larger 12V vehicle emergencies if you also want backup power for small devices. Its main trade-offs are weight, the need to supply a wall charger and the absence of a built-in tire inflator.
Buy it for a compatible vehicle and a clear charging routine. Choose a different Gooloo model if you'll benefit more from faster recharging, tire inflation or a lighter emergency kit.
What does the Gooloo GP4000 offer?
The GP4000 combines 4000A peak output and a 24,000 mAh battery with USB device charging. Gooloo rates it for all gasoline engines and diesel engines up to 10.0L, provided the vehicle uses a compatible 12V system.
Gooloo GP4000: Best for larger vehicle emergencies
- 4000A peak output
- 24,000 mAh capacity
- Dual USB ports and USB-C
- 12V vehicles
A jump starter for compatible 12V vehicles with backup USB power for phones and other small devices. Choose it for vehicle emergencies when you don't need a built-in tire inflator or 100W charging.
Pros
- BOOST button for very low battery voltage
- USB outputs for small devices
- Includes smart jumper cables and an EVA storage case
- Built-in flashlight
Cons
- Wall charger is not included
- No built-in tire inflator
- Heavier than the GP3000
It measures 8.97 x 3.92 x 1.49 in and weighs 3.9 lb. That weight matters if you'll carry the kit between vehicles, although a pack kept in one vehicle may make carrying comfort less important.
The hardened plastic housing has rubber corners, and the kit includes all-metal clamps and a flashlight. Those details suit roadside use, but keep the pack protected from moisture and inspect it after a fall.
Where the Gooloo GP4000 earns its score
The GP4000 earns 8.6 for its engine coverage and emergency charging options. The included case keeps the pack and cables together, while the missing wall charger adds a task before it's ready for service.
It makes the most sense as equipment you prepare, store and check regularly. Drivers who want one tool for tire care, or who frequently recharge a laptop, have more suitable choices below.
How does the Gooloo GP4000 compare with other Gooloo models?
Choose the GP4000 for vehicle starting and small-device backup power. The alternatives serve different priorities, so decide which extra function you'll use before comparing headline output numbers.
| Model | Main reason to choose it | Main reason to skip it |
|---|---|---|
| Gooloo GP4000 | Larger engine coverage and backup device power | You want tire inflation or a lighter kit |
| Gooloo GT4000S | Fast recharging and compatible laptop charging | You mainly want a pack kept ready for occasional emergencies |
| Gooloo A3 | Jump-starting and tire top-ups in one unit | Your engine exceeds its limits |
| Gooloo GP3000 | Lower weight for carrying between vehicles | You need the GP4000's engine coverage |
Gooloo GT4000S: for drivers who recharge on the road
The GT4000S suits frequent travelers who use their emergency pack for more than an occasional start. It offers 100W two-way USB-C charging, a 3.2-inch status screen and an included 100W car charger.
Gooloo says a suitable charging setup can refill it in 1.2 hours. That makes it easier to restore the pack after use, but charge it before departure rather than relying on an emergency recharge beside a disabled car.
Its 20,000 mAh battery supports compatible device charging, including laptops through USB-C. Gooloo rates its starting function for gasoline engines up to 12.0L and diesel engines up to 10.0L.
Skip it if you won't use its charging speed or laptop output. At 9.05 x 3.93 x 2.12 in, it's also thicker than the GP4000, which may matter in a shallow storage compartment.
Gooloo A3: for tire top-ups as well as flat batteries
The A3 suits drivers who want a built-in tire inflator alongside their jump starter. It has pressure detection, automatic shutoff, 5 inflation modes and 5 nozzles for different inflation jobs.
Its compressor has a maximum pressure of 150 PSI and airflow of 35 L/min. Use your vehicle's recommended tire pressure as the target; the compressor's maximum is a tool limit, not a setting for car tires.
The A3 has 3000A peak output and a 12,000 mAh battery. Gooloo rates it for gasoline engines up to 9.0L and diesel engines up to 6.5L, so skip it if your engine falls outside those limits.
Inflation draws from the same reserve you need for starting. Recharge after using the pump, and read the Gooloo A3 review if combining these jobs is your main reason to buy.
Gooloo GP3000: for a kit you carry between vehicles
The GP3000 suits drivers who value lower carrying weight. At 1.4 lb, it's easier to move between a family car, work vehicle and home storage than the GP4000.
It pairs 3000A peak output with a 16,000 mAh battery. Gooloo rates it for gasoline engines up to 9.0L and diesel engines up to 7.0L.
USB-C, Quick Charge 3.0 ports and a flashlight cover small-device charging and lighting needs. Skip it if your vehicle needs the GP4000's wider engine coverage, rather than buying a smaller pack simply because it's easier to carry.
For brand-level context, see NOCO vs Gooloo. Compare the best jump starters if you haven't settled on Gooloo.
How do you confirm the GP4000 fits your vehicle?
Confirm system voltage, engine type and approved connection points before buying. A compatible engine size is only one part of the decision, particularly with RVs, trucks and vehicles that have more than one battery.
Start with the vehicle manual. Find the jump-start section and check whether it calls for remote terminals rather than direct access to the battery.
A vehicle with multiple batteries may use a different electrical arrangement from a passenger car. Never assume that every truck or piece of equipment has a compatible system because it appears in a broad vehicle category.
For a truck, consult the diesel truck jump-starting guide. Use the guide to how many amps a jump starter needs to understand output claims without treating peak amperage as the only buying rule.
Battery condition also matters. A jump starter can help provide starting power, but it cannot repair a failed battery, a poor cable connection or a mechanical fault.
What should you do before storing the GP4000 in your car?
Charge it, read the instructions and organize the complete kit before putting it away. Discovering a missing charging adapter or unfamiliar clamp indicator during a breakdown defeats much of its purpose.
The package includes smart jumper cables, a USB to Type-C cable, a cigarette lighter socket adapter and an EVA storage case. A wall charger is not included, so arrange a suitable power source using the charging instructions.
Don't assume the cigarette lighter socket adapter recharges the pack. Identify each accessory's purpose before relying on it.
Check where the pack will fit and how you'll reach it if the vehicle loses electrical power. Secure the case so it cannot slide around, and keep it clear of locations exposed to water or strong heat.
Read the status indications while you're somewhere comfortable and well lit. Keep the instructions accessible, especially the sections on warnings, unsuccessful starts and BOOST mode.
How should you use the GP4000 and its BOOST button?
Use the normal starting procedure first, and use BOOST only when the GP4000 instructions call for it. Gooloo provides the button for batteries with extremely low voltage, not as the default setting for every start.
Before connecting anything, park safely, switch off the ignition and turn off accessories. Do not attempt to jump-start a battery that is frozen, leaking, swollen or visibly damaged.
Follow the vehicle manual for the correct connection points and the GP4000 manual for connection order. Keep cables clear of fans, belts and other moving parts.
Attach the clamps firmly to the approved clean contact points, then check the device's status indication. Poor contact can prevent a start even when the pack has enough charge.
If the vehicle doesn't start, stop and consult the troubleshooting instructions. Follow the stated limits for cranking attempts and pauses rather than repeatedly trying the ignition.
After a successful start, disconnect and stow the equipment as directed. A running engine is not proof that the battery is healthy or fully charged.
The GP4000 includes 10 built-in protections, but correct connections still matter. Review how to use a portable jump starter before you need roadside help.
Can the GP4000 replace a power bank or battery charger?
The GP4000 can act as backup power for small electronics, but it isn't a substitute for a vehicle battery charger. Jump-starting supplies a short burst for starting; recharging a depleted vehicle battery is a different job.
It has 2 USB output ports, including one with fast charging, plus a USB-C connection rated at 5V/3A. USB-C can charge compatible devices or recharge the pack itself.
Use those ports for a phone, GPS unit, camera or other suitable device. Check the device's input requirements and use the correct cable rather than assuming any USB connection provides its fastest charging speed.
Keep a starting reserve if the pack is part of your roadside kit. Draining it for entertainment or everyday phone charging can leave it unavailable for its main purpose.
Battery capacity in mAh doesn't directly tell you how many full phone charges you'll get. Voltage conversion, device size and charging losses affect the result.
Read whether a jump starter can charge a battery if your goal is restoring a car battery rather than starting the engine once.
How should you care for the GP4000 in cold weather and storage?
Check the charge on a schedule and follow the charging temperature limits in its manual. Gooloo recommends recharging the GP4000 every 2 to 3 months during extended idle periods.
Set a reminder and check it before long drives, winter travel and after use. Include device charging in that routine, since a phone top-up also reduces the reserve.
Gooloo gives a starting temperature range of -4°F to 140°F. That doesn't guarantee the conditions for charging or long-term storage, so use the manual's separate guidance for those tasks.
Avoid leaving the pack in direct sunlight or beside a heat source. If it becomes unusually hot, swollen or damaged, stop using it and follow the manufacturer's guidance.
Keep the clamps dry and the ports clear of debris. Inspect the cables and housing during charge checks so damage doesn't go unnoticed inside the case.
Cold also affects the vehicle battery you're trying to start. Read how cold weather affects a car battery if starting trouble returns each winter.
Which mistakes should GP4000 buyers avoid?
The biggest mistakes are buying on peak amps alone and neglecting readiness. A suitable pack needs a compatible vehicle, enough charge and a user who understands its controls.
- Treating engine coverage as universal approval: check the vehicle manual even when the engine falls within Gooloo's stated range.
- Using BOOST without reading its procedure: confirm the connection points, clamp contact and device indications first.
- Repeating failed attempts: follow the troubleshooting steps and cranking limits instead of draining the pack.
- Expecting a jump-start to fix recurring trouble: arrange a battery and charging-system check if the vehicle keeps needing assistance.
- Choosing features you'll never use: prioritize carrying weight, charging speed or inflation only when they fit your routine.
Should you buy the Gooloo GP4000 or another model?
Buy the Gooloo GP4000 for a compatible larger-engine vehicle when backup power for small devices also matters. Choose the GT4000S for frequent recharging and compatible laptop use, the A3 for tire top-ups, or the GP3000 for a lighter kit.
Skip the GP4000 if your main need is maintaining or slowly recharging a vehicle battery. That's a battery-charger job, and buying more peak output won't change it.
Before relying on any model, confirm its fit, prepare its accessories and set a recharge reminder. Follow how to charge a jump starter so the pack is ready when you need it.
Frequently asked questions
Can the Gooloo GP4000 jump-start a diesel engine?
Yes, Gooloo rates the GP4000 for diesel engines up to 10.0L in compatible 12V vehicles. Check your vehicle manual for approved jump-start points and any restrictions before connecting it, especially on trucks with more than one battery.
Engine size alone doesn't confirm that the electrical system is suitable.
Does the Gooloo GP4000 come with a wall charger?
No, the GP4000 does not include a wall charger. The kit contains smart jumper cables, a USB to Type-C cable, a cigarette lighter socket adapter and an EVA storage case.
Arrange a suitable USB power source before first use, and don't confuse the socket adapter with a charging adapter.
How often should you recharge the Gooloo GP4000?
Gooloo recommends recharging the GP4000 every 2 to 3 months during extended idle periods. Also check its charge before a long drive and after using it for a jump-start or device charging.
Set a calendar reminder so the pack doesn't sit forgotten until you need it.
Can the Gooloo GP4000 charge a phone?
Yes, the GP4000 can charge phones through its USB connections, including a USB output that supports fast charging. Use a cable suited to your phone and keep enough charge in reserve for the vehicle.
The pack can power small electronics, but it doesn't replace a vehicle battery charger.
