GOOLOO GT4000S Jump Starter 4000A Portable Car Battery Charger 12V Booster

High-Power 4000A Jump Starter & 100W Fast Charger for 12V Engines Up to 10L Diesel/12L Gas

(63 customer reviews)

$189.99

GOOLOO
Today price savings: -47%
Rating: 4.6 out of 5 stars
Opinions & Reviews: 1607
SKU: B09M9HQG73/com Category:

Product Features and Description

The GOOLOO GT4000S Jump Starter is designed to bring powerful solutions to the table with its impressive 4000 Amp capabilities. This portable car battery charger is ideal for those unexpected moments when your vehicle’s battery decides to act up. Whether you’re in freezing weather or stuck on a deserted road, its ability to jump-start 10L diesel and 12L gas engines makes it a staple in emergencies.

Beyond bailing you out in a jam, this nifty device serves as a reliable companion for camping trips or long road adventures, doubling as a 100W fast-charging power bank for electronics.

Readers can expect an in-depth description of the product’s features, user opinions, reviews, videos, comparisons, and attractive market offers for the product.
Jump starter power bank connected to a car battery, with 92% power, compatible with 12V systems for 10.0L diesel and 12.0L gas engines
High-capacity jump starter power bank providing 60 starts and featuring an LED light, ideal for reviving dead vehicle batteries up to 12.0L gas and 10.0L diesel
  • Rapid Charging Capabilities: The ONE & ONLY 100W Fast-Charging Car Battery Jump Starter is an impressive device, requiring only 1.2 hours to fully charge from 0% to 100%. Even a brief 5-minute charge is sufficient to jump-start a car, making it an essential tool for emergencies. This product comes with a 100W car charger in the package and supports fast charging through its type-c port, ensuring compatibility with your own chargers.
  • Versatile Charging for Laptops: This device can charge your MacBook and other laptops with up to 100W speed, matching the original adaptor’s efficiency through the Type-C port. The jump starter also serves as a portable power source for your devices.
  • Compact Yet Powerful Jump Starter: With 4000A peak cranking power, the Gooloo GT4000S is capable of starting nearly all 12-volt vehicle engines, up to 12.0L gasoline or 10.0L diesel, within seconds. Its compact size and powerful output make it a superior choice over traditional car jumper cables, fitting perfectly for vehicles like RVs, motorcycles, SUVs, tractors, and boats.
  • Enhanced Safety and Ease of Use: The device features a 3.2-inch LED screen, providing clear status updates for intuitive operation. Built-in with 10 kinds of protection technologies, it ensures safer jump-starting without concerns of misoperation or sparks, offering peace of mind for users.
  • Extended Stand-by Time: With a remarkable 24-month stand-by time, regular charging is not required for the GT4000S. The incorporated protection technologies not only enhance safety but also prolong the product’s lifespan, making it a reliable investment.
  • More Than Just a Jump Starter: Beyond its primary function, the GOOLOO GT4000S serves as a portable battery bank with three USB ports and a 400-lumen flashlight featuring SOS, SPOTLIGHT, and STROBE modes. Additionally, it includes a 15 volt 10 Amps port, suitable for powering devices like tire inflators and inverters.
  • Comprehensive Package Contents: The package includes the Gooloo 4000A Portable Car Jump Starter Battery Pack GT4000S, Heavy Duty Jumper Cables, SC 100W Car Charger, USB to Type-C Cable, Type-C to Type-C Cable, Cigarette Lighter Adapter, Storage Bag, and User Manual, ensuring you have everything needed for optimal usage.
GOOLOO jump starter and power bank with 100W fast charging, displaying 65% charge, inside a car
Experience quick and efficient charging with the GOOLOO 100W two-way fast charging jump starter and power bank, ready to boost your car in just 5 minutes.

For years, GOOLOO has stood as a leader in the field of jump-starter research and manufacturing. Their commitment to delivering high-quality products ensures customer satisfaction. Among their impressive lineup, the Gooloo GT4000S shines with its outstanding performance in temperatures ranging from -20℃ to 60℃. This robust capability makes it a reliable companion for drivers, especially as colder weather approaches, providing peace of mind regardless of the season.

In addition to their product excellence, GOOLOO emphasizes the importance of customer interaction and feedback. The brand is dedicated to offering superior service, considering it as crucial as their product quality. This philosophy underscores their value for customer ideas and suggestions, reflecting a company that cares about continuous improvement. The GT4000S jump starter isn’t just a tool but a thoughtful gift idea for family or friends, enhancing the driving experience by being a trusted roadside companion.

GOOLOO jump starter and power bank in red and black with a digital display, showcasing laptop connectivity and fast charging capability
GOOLOO jump starter and power bank offers reliable performance with up to 100W fast charging, featuring a digital display for charge and power output in a sleek red and black design.

Comprehensive Analysis of GOOLOO GT4000S Jump Starter Features

Feature Description
Amperage
Excellent
The ”4000 Amps” peak current provides the power necessary to jump-start vehicles with large engines, up to 12L Gas or 10L Diesel. This ensures reliable performance even for heavy-duty applications.
Battery Capacity
Good
With an ”88.8 Watt Hours” capacity, the jump starter can handle multiple jump starts on a single charge, supporting a range of vehicle types and providing versatility.
LED Flashlight
Good
The 400 lumen LED flashlight with three modes (SOS, SPOTLIGHT, STROBE) enhances the product’s utility by providing emergency lighting options.
Two-Way Fast Charging
Excellent
Supports 100W max two-way super-fast charging, enabling the device to be fully charged in about 1.2 hours, reducing downtime significantly.
Water Resistance
Good
The IP65 water-resistant feature ensures durability in various environmental conditions, making it suitable for outdoor and emergency use.
Close-up view of a power bank showcasing a 3.2-inch screen with full battery and charging status
Experience clarity and functionality with our red and black power bank, featuring a user-friendly 3.2-inch screen displaying 100% battery and 100W output power.

Real Experiences: The Highs and Lows of the GOOLOO GT4000S Jump Starter

A Reliable Lifesaver – k.nadella shared a remarkable experience with this jump starter for his Mustang GT. His vehicle’s dead 5-liter engine posed no challenge for the GT4000S, which brought his car back to life. He emphasized the ease of use, stating the instructions were straightforward, and the safety features provided much-needed peace of mind. This product stayed remarkably charged, at 91%, even after use, affirming it as a reliable trunk essential.

Mighty Yet Compact – According to Cam, the GT4000S has frequently “saved the day.” Its compact size, packed with power, consistently impresses everyone who sees it in action. This makes it an ideal gift choice for those who might find themselves in a pinch with a dead battery, as its efficient design allows pump-free deployment convenience without having to search for a bigger jump box.

Stellar Performance in the Cold – AD praised the GT4000S for operating flawlessly even in harsh conditions. It managed to start his disconnected Pathfinder battery twice in freezing temperatures while maintaining a high charge level post-use. AD noted it as “Outstanding,” indicating its robustness and dependability as unmatched in cold-weather jumping capabilities.

Non-Functional Units – User Charles Hayes expressed sheer dissatisfaction upon discovering that the unit was “completely dead right out of the box.” It failed to charge or turn on, highlighting a manufacturing inconsistency or possible product defect that leaves customers vulnerable at what is often a critical time.

Unmet Expectations – ncooty found the GT4000S’s performance somewhat lacking as it couldn’t start a nearly dead 5.3L V8 battery, whereas his smaller NOCO starter did so on the second try. Additionally, he struggled with the terminal clamps being inconvenient for side-post battery types, which stifled an easy connection. For such situations, its usability falls short of what users expect of proclaimed comprehensive car starter sets.

The stars speak of…

Opinions about this product were divided in such a proportion among the buyers.

Five Stars: 82%
Four Stars: 9%
Three Stars: 3%
Two Stars: 2%
One Star: 4%
The most helpful positive feedback Reviewed in the United States on January 1, 2025 by Amazon Customer, and is titled “Compact and Powerful”
Don’t be fooled by it’s small size compared to conventional jump boxes, this has more power than many four times it weight. Quick to charge, with the convenient screen showing percentage, it’s ready for multiple uses before needing recharge. Removable cables and it’s light weight make it easy to transport from vehicle to vehicle and into the house for charging.
Customer Rating: 5
Helpful Rate: 3
Variation purchased: B09M9HQG73
People find the following negative one quite helpful. Reviewed in the United States on December 29, 2024 by ncooty, titled “Does not deliver rated CCA; couldn’t start a 5.3L V8”
Had an almost completely dead battery on a 5.3L V8. This thing (at 100% charge) would not even crank it. My much smaller NOCO started it on the second try. Also, the clamps on this thing have protective covers around the jaws that make it difficult to attach to side posts. The display is nice, but it doesn’t deliver the cranking amps promised, so what good is it? Not recommended.
Customer Rating: 2
Variation purchased: B0C5M79JJC

Available Product Variations

Color: Yellow
189.99 $
Today only price

GOOLOO GT4000S Jump Starter 4000A for 10L Diesel/12L Gas Engines, 100W Fast-Charging Portable Power Bank, Yellow

  • Brand: GOOLOO
  • Item Weight: 2.31 Pounds
  • Amperage: 4000 Amps
  • Peak Output Current: 4000 Amps
  • Specification Met: UL, Overcharge, Overload, Short-circuit Protection
  • Manufacturer: ‎GOOLOO
  • Vehicle Fitment Code: ‎[Tra, Motorcycle, Passenger Car, Truck, RVs, pickup trucks, SUVs, tractors, boats]
  • Model: ‎4000A Car Battery Jump Starter
  • Product Dimensions: ‎9.05 x 3.93 x 2.12 inches
  • Item model number: ‎GT4000S
  • Batteries: ‎1 Lithium Polymer batteries required. (included)
  • Manufacturer Part Number: ‎GT4000S
  • Bulb Type: ‎LED(Stable/Strobe/SOS)
  • Special Features: ‎√Jump start vehicles up to 12L Gas/10L Diesel engines,including Hybrid cars., √400 lumen LED flashlight with 3 modes(SOS, SPOTLIGHT, STROBE)., √3.2-inch screen displays real-time battery status., √4000 Amps peak current cranking power., √Powerful & handy portable jump starter for car battery., √24 Months standby time., √Battery Life: 1000+ Cycles., √A 15 volt 10A port for powering any 15V or 12V DC devices, such asw air compressor, car fridge, car vacuum cleaner, and more., √100W max two-way super-fast charging supported. Fully charge in about 1.2 hours., √IP65 water-resistant & 94V0 flame retardant, √Large battery capacity.
  • ASIN: B0C5M79JJC
  • Best Sellers Rank: #675 in Automotive (See Top 100 in Automotive) #37 in Jump Starters
  • Date First Available: May 20, 2023
  • Features: Battery Cell Composition Lithium Polymer, Voltage 12 Volts, Vehicle Service Type Passenger Car, Tra, Motorcycle, Truck, Battery Capacity 24000 Milliamp Hours

Insights & Inquiries: Getting to the Heart of Your Questions

What types of vehicles can this jump starter support?

This versatile jump starter can assist a wide range of vehicles, including cars, trucks, buses, motorcycles, scooters, lawn mowers, ATVs, tractors, snowmobiles, RVs, vans, and even watercraft. It’s powerful enough to jump-start engines up to 12L for gasoline and 10L for diesel, making it an ideal choice for most vehicle owners.

How does the jump starter perform under extreme weather conditions?

The GOOLOO jump starter is designed to function optimally in temperatures ranging from -20℃ to 60℃. So whether you’re dealing with the harsh cold of winter or the sweltering heat of summer, you can rely on this device to perform when you need it most.

What kind of battery life can I expect from this device?

The GT4000S jump starter boasts an impressive battery life with 1000+ cycles, meaning you can utilize it repeatedly before there’s any significant degradation in performance. Additionally, its 24 months of standby time ensures it will be ready whenever called upon.

How does the two-way fast charging feature work?

The device supports 100W max two-way super-fast charging, enabling you to recharge the unit fully in about 1.2 hours. This feature is particularly handy if you’re often on the go and need a quick recharge between uses. Moreover, it can power up your 15V or 12V DC devices, providing a versatile energy solution.

Is this jump starter compact enough for travel?

With dimensions of 9.05″D x 3.93″W x 2.12″H and a weight of 2.31 pounds, the jump starter is both compact and lightweight. Its portable design makes it easy to store in your vehicle, ensuring that you always have emergency power at hand during your travels.

What safety features does it include?

Safety is paramount, and this jump starter includes several key features to ensure user security. It meets CE and FCC specifications and offers an IP65 water-resistant rating, combined with 94V0 flame retardant material. Additionally, the built-in LED flashlight with SOS, spotlight, and strobe modes adds a layer of safety in roadside emergencies.

How can I view the current battery status of the device?

The jump starter is equipped with a 3.2-inch screen that provides real-time battery status updates. This clear display allows you to easily monitor the device’s battery level and ensures you’re never caught off guard by a low charge.

GOOLOO GT4000S jump starter power bank with 24-month standby and 100W output, featuring a 100% charge digital display
Discover the GOOLOO GT4000S Jump Starter Power Bank, offering a superior 24-month standby and powerful 100W output, ideal for reliable car jump-starting. Compare its long-term efficiency with traditional jump starters ranging from 6 to 18 months.
Rugged GOOLOO jump starter power bank with IP65 waterproof rating, resistant to rain and dust, designed for outdoor use
Durable GOOLOO jump starter power bank with IP65 waterproof and dustproof design, ideal for challenging outdoor conditions.

Additional information

Color

Red, Yellow

Brand

GOOLOO

Product Dimensions

9.05"D x 3.93"W x 2.12"H

Item Weight

2.31 Pounds

Amperage

4000 Amps

Peak Output Current

4000 Amps

Specification Met

‎CE, FCC

Manufacturer

‎GOOLOO

Global Trade Identification Number

‎33487794897135

Model

‎4000A Car Battery Jump Starter

Item model number

‎GT4000S

Batteries

‎1 Lithium Polymer batteries required. (included)

Manufacturer Part Number

‎GT4000S

Bulb Type

‎LED(Stable/Strobe/SOS)

Special Features

‎√Jump start vehicles up to 12L Gas/10L Diesel engines,including Hybrid cars., √400 lumen LED flashlight with 3 modes(SOS, SPOTLIGHT, STROBE)., √3.2-inch screen displays real-time battery status., √4000 Amps peak current cranking power., √Powerful & handy portable jump starter for car battery., √24 Months standby time., √Battery Life: 1000+ Cycles., √A 15 volt 10A port for powering any 15V or 12V DC devices, such asw air compressor, car fridge, car vacuum cleaner, and more., √100W max two-way super-fast charging supported. Fully charge in about 1.2 hours., √IP65 water-resistant & 94V0 flame retardant, √Large battery capacity.

ASIN

B09M9HQG73

Best Sellers Rank

#675 in Automotive (See Top 100 in Automotive) #37 in Jump Starters

Date First Available

November 20, 2021

Features

Battery Cell Composition Lithium Polymer, Voltage 12 Volts, Vehicle Service Type Lawn Mower, Van, Watercraft, Passenger Car, ATV, Tractor, Bus, Truck, Scooter, Snowmobile, UTV, Motorcycle, RV See more, Battery Capacity 88.8 Watt Hours

63 reviews for GOOLOO GT4000S Jump Starter 4000A Portable Car Battery Charger 12V Booster

  1. Patti D.

    Reliable and Powerful Jump Starter!

    I was impressed with this jump starter! My 5.3L Silverado had a completely dead battery, and this unit started it effortlessly—using only 5% of its charge. It’s compact, well-priced, and a great addition to my garage. Definitely a must-have for any vehicle emergency kit! Highly recommend.

    Variation: Color: Red / Reviewed in the United States on January 31, 2025
  2. Michael

    Product works well and charges fast the carry bag that came with it is a complete JOKE,

    Your better off keeping the box it came in and use it to protect the jump pack and storing the cables, very sad for what you pay for the jump pack and they give you a stupid, useless, cheap bag to protect it, other than that, its my only complaint so far about this jump starter.

    Variation: Color: Yellow / Reviewed in the United States on January 30, 2025
  3. Roger

    Works as advertised

    Works as advertised

    Variation: Color: Yellow / Reviewed in the United States on January 30, 2025
  4. Kevin

    Awesome booster

    This booster works great, I tested it on a skid steer with a dead battery at around 15 degrees, after warming the glow plugs it started and still had 89% charge.

    Variation: Color: Red / Reviewed in the United States on January 28, 2025
  5. wch

    Disappointed !!

    Disappointed in this unit. Not because it doesn’t work; I haven’t even used it. After reading through the “User Manual” there are inconsistencies. First off the blurb in the Amazon description says “24 Months Stand-by Time: Regular charging is not necessary as long as you own the GT4000S battery jump starter. The built-in 10 protection technologies also greatly extend the service life of the product.” However the UM says “it would be best to recharge it every 3 months “. That being said the main reason for returning the GT4000S is that the UM also says “..don’t store the device in vehicle which parked in hot weather for long periods of time”. Temperatures higher than 140°F damage may occur to the device making it unsafe. We live in Florida where Temperature inside a parked vehicle can easily reach +150°F. Carrying the GooLoo GT4000S around with me every time I park up our vehicles isn’t practical. So it’s back to leaving a set of jumper cables in the trunk for that “just in case moment”. Other than the above I think it’s a great idea and a pitty it isn’t practical for me. Disappointed !

    Variation: Color: Yellow / Reviewed in the United States on January 28, 2025
  6. JimBob

    Fantastic, Love all the Features

    Great piece of equipment. Amazon best price. MFG website $30 more

    Variation: Color: Red / Reviewed in the United States on January 26, 2025
  7. Cliff

    Lasts forever, works perfectly

    I keep in box under rear seat and recharged it after a year – it was still at 80% charge after being used twice! Wonderful product!

    Variation: Color: Red / Reviewed in the United States on January 26, 2025
  8. Derek Dean

    Good, but I Prefer the GT4000A

    I purchased the GT4000s, but ended up returning it, not because of a problem, but because Amazon lowered the price of the GT4000A to only $10 more than the GT4000s, and the GT4000A included the prewarmer tech which allows the unit to function in subzero weather by warming itself up before turning on. Both are good units, but for the slight increase in cost, the GT4000A makes more sense.

    Variation: Color: Yellow / Reviewed in the United States on January 25, 2025
  9. Micheal & Sarah

    Worked like a charm.

    I bought one of these for my wife’s older car. The car sometimes has a hard time in the cold. I charged it up, gave it to her to put in her car with minimal instruction on how to use it. I told her that there were instructions on the body itself. From the time she got it connected to the battery it was less than 2 minutes before the car was started and she was taking it off again. The product does what it says it will do. Worked in 20° weather Fahrenheit.

    Variation: Color: Red / Reviewed in the United States on January 24, 2025
  10. Farmer

    Got my tractor started!

    It was pretty cold one morning and my John Deere 9400 didn’t quite have enough power to get the engine started. Hooked this bad boy straight to the starter and was able to get it to turn over fast enough to start. This is a 12.5liter diesel engine too!

    Variation: Color: Yellow / Reviewed in the United States on January 23, 2025
  11. R. G.

    No need for a 2nd vehicle with jumper cables.

    Arrived January 17th, five days later on the 22nd I had to put it to the test. The battery on the Toyota 4-Runner was completely dead, no dash board lights on. Found that the driver side door had been left ajar which drained the battery. Draining a few days since we did not go anywhere after the last errand. Hooked up the jumper, I had to use the booster and the 4-runner immediately started. I could have used jumper cables with our 2nd vehicle but this proves what if there is no 2nd vehicle around to use jumper cables out on the road.

    Variation: Color: Red / Reviewed in the United States on January 23, 2025
  12. Richard Greg Jr.

    I could not get the unit to charge its battery

    Opened the unit, read the directions, and saw the internal battery was at 79%. I hooked up a charger but the unit did not recognize that it was being charged. I tried different chargers and different cables to no avail. I left the charger plugged in overnight and next morning it was still at 79%. I contacted Amazon and asked for a replacement and returned the defective unit. Let’s hope it was just one bad unit because I really like the product.

    Variation: Color: Red / Reviewed in the United States on January 20, 2025
  13. Biljan

    The perfect emergency companion!

    The GOOLOO jump starter is nothing short of incredible! It effortlessly brought a dead PWC back to life and, impressively, powered a portable inflator to fill four flat tires up to 50 psi—all on a single charge. This powerhouse exceeded my expectations and proved its reliability in a pinch. I wholeheartedly recommend it to anyone on the fence about purchasing a dependable and versatile jump starter. It’s a must-have for emergencies and beyond!

    Variation: Color: Red / Reviewed in the United States on January 19, 2025
  14. Alex Kennedy

    This thing throws hands

    05 ML350, huge 850 CCA battery was smoked. Smaller jump pack could barely turn the motor cause it was cold, so I left the car for the next day. I ordered this for assurance that I could start a DEAD/No battery truck in the cold even if the jump pack is just as cold as the truck. (what good is a jump pack you need to keep indoors and doesn’t work when it’s cold?) The smaller warmed up (70f) jump pack that I brought in the house overnight got the truck started after 4 or 5 cranks but I had to run around to the front to reset the jump setting each time. I’ll give that little thing credit for starting the truck at all, good little spring-fall pack but can’t handle the winter. Well, the package that came in the mail that morning, I left it in the cold for 4 hours. (-13f, without wind chill) This -13f GOOLOO straight out of the box with 80% charge? Yeah the pack was too cold to get the motor up to speed first try. 2nd try she’s going a decent pace. Third? Truck started like it was 80f outside. Never had to go to the front of the truck to change anything, just key off and try her again. This jump pack went from absolutely frigid to warm enough and ready to rock a truck with effectively no battery at all… in 10 seconds. Brough the truck to my brothers shop and the battery was toast, I was running on alternator the whole time and I find out the battery was completely bricked. He tries to start it with a fully charged 15000amp shop jump pack, and it barely budges and won’t start. I say let me try the little GOOLOO cause it’s got some juice, starts right up first key turn. After all the screwing around (5 or so starts) the pack still had 60% on it

    Variation: Color: Red / Reviewed in the United States on January 19, 2025
  15. Julie R.

    WOW, Mind BLOWN

    Even AAA has a challenge jumping my completely dead bmw battery. Had to use boost function but it started instantly and only took 5% power, unbelievable !! I have purchased two other jump boxes oh make that three including the one from Costco and not even a slight attempt at starting the car. Oh I even bought the CTEK to do a slow trickle charge and it never moved up one light in the charging sequence after leaving it connected for a full 2 days.

    Variation: Color: Red / Reviewed in the United States on January 18, 2025
  16. Jon

    Ok for small cars

    This works great for smaller cars. Larger cars it struggles a bit to start.

    Variation: Color: Red / Reviewed in the United States on January 13, 2025
  17. Dwight Harding

    Perfect

    I personally think every car on the road should have this in their trunk. Easy to use and reliable.

    Variation: Color: Red / Reviewed in the United States on January 13, 2025
  18. Gary W. Long

    Surprisingly Powerful

    I received the starter charged at 70%, so I plugged it into a USB-C phone charger, and it topped off in under an hour. I then attached it to the very low battery on my Toyota 4Runner, 6cyl, turned on the ignition and the engine roared to life. I’m very impressed with the cranking speed achieved. It’s a great investment with several handy uses other than jump-starting.

    Variation: Color: Yellow / Reviewed in the United States on January 12, 2025
  19. HBMaGneT

    Great performance & Good number of starts & Easy to use.

    12/2024: I had to finally use it in winter and the override / boost feature is a necessity if your battery is dead. It seems good at detecting a when to start discharge when crank is initiated and not just dumping everything into a dead battery. The Avapow wouldn’t consistently output since the battery voltage was too low. Gooloo FTW. Initial review: I tested it by performing 10s no fuel cranks with 15 minute cool downs. And this did 3x more starts and the engine cranked faster than a 4000A Avapow I also bought at the same time.

    Variation: Color: Red / Reviewed in the United States on January 12, 2025
  20. James A

    Didn’t work

    I bought this to give as a Christmas gift. I just got contacted by the recipient who asked for the invoice number so that it could be returned for warranty replacement because it didn’t work. I’m pretty embarrassed.

    Variation: Color: Yellow / Reviewed in the United States on January 10, 2025
  21. Amazon Customer

    Great product

    Easy-to-use nice to have backup when car won’t start.

    Variation: Color: Red / Reviewed in the United States on January 7, 2025
  22. RL

    Holds a charge well.

    Used this item three times so far, V10, lawn tractor and V8. Didn’t seem to work as well as I wanted. If you hit the boost button 3x forget using this charger till it resets. Just connect it to the battery and wait for a short time then try to start your car. It seems to be all automatic, if your car doesn’t start 3x the unit agains goes to error mode for a time. I hope I never really need this unit or I can figure out how to make work.

    Variation: Color: Red / Reviewed in the United States on January 6, 2025
  23. Kaitlin Trumbull

    Worked on my car

    This worked on my Subaru Outback which has been having battery issues lately. Took 2% of the jump pack battery to get my car going so a charge should last a while. Cheaper than other option at the same amp size. I only wish the light had its own button rather than sharing with the power.

    Variation: Color: Yellow / Reviewed in the United States on January 6, 2025
  24. Damon

    Gooloo

    The unit will not charge. When you press the power button it only beeps and displays and error E4 message. I have not been able to contact the manufacturer or find a solution for the error.

    Variation: Color: Red / Reviewed in the United States on January 6, 2025
  25. Obet Lezcano

    It won’t charge again after it died

    I have tried to charge it but it won’t charge at all

    Variation: Color: Red / Reviewed in the United States on January 3, 2025
  26. franklin

    Works great ..

    Had to start several vehicles couple had been sitting awhile ..to my surprise it started 2 tractors,a pickup and a backhoe without recharging…worth every penny

    Variation: Color: Red / Reviewed in the United States on January 1, 2025
  27. Shrek

    Great Product

    great

    Variation: Color: Red / Reviewed in the United States on January 1, 2025
  28. Amazon Customer

    Compact and Powerful

    Don’t be fooled by it’s small size compared to conventional jump boxes, this has more power than many four times it weight. Quick to charge, with the convenient screen showing percentage, it’s ready for multiple uses before needing recharge. Removable cables and it’s light weight make it easy to transport from vehicle to vehicle and into the house for charging.

    Variation: Color: Red / Reviewed in the United States on January 1, 2025
  29. Amazon Customer

    Awesome

    Jumped my dead battery on my hummer instantly. Other jumper failed. Buy this model. Also bundled with tire inflator. Great value

    Variation: Color: Red / Reviewed in the United States on January 1, 2025
  30. Angeka

    Great Product

    This product is very good. Used it to jump a completely dead vehicle 7 times before this jump starter needed to be charged. Great value for a great product!

    Variation: Color: Yellow / Reviewed in the United States on December 30, 2024
  31. ncooty

    Does not deliver rated CCA; couldn’t start a 5.3L V8

    Had an almost completely dead battery on a 5.3L V8. This thing (at 100% charge) would not even crank it. My much smaller NOCO started it on the second try. Also, the clamps on this thing have protective covers around the jaws that make it difficult to attach to side posts. The display is nice, but it doesn’t deliver the cranking amps promised, so what good is it? Not recommended.

    Variation: Color: Yellow / Reviewed in the United States on December 29, 2024
  32. joe

    This is a really powerful jump pack

    This is such a great powerful jump pack after I bought one for myself I bought one for my wife’s car then three more as presents to I direct reports at work. They are a great group and deserve a really nice gift!

    Variation: Color: Red / Reviewed in the United States on December 28, 2024
  33. Rob M

    Very useful

    This jumpmpack has been reliable. Lasts a long time without needing a recharge. Will jump a larger engine just fine.

    Variation: Color: Red / Reviewed in the United States on December 28, 2024
  34. Charles hayes

    Completely dead right out of the box!

    Will not charge, will not turn on. Complete waste of money buy a real brand not this one

    Variation: Color: Red / Reviewed in the United States on December 28, 2024
  35. Nader G

    Works great, keeps charging strength for multiple uses.

    My husband was surprised by how many times he used this to jump start his tractor before he had to recharge it. He loves it!

    Variation: Color: Yellow / Reviewed in the United States on December 28, 2024
  36. kpitrl

    Works GREAT!!

    Variation: Color: Yellow / Reviewed in the United States on December 27, 2024
  37. k.nadella

    A Lifesaver for my Mustang GT

    I rarely write reviews, but I felt compelled to share my experience with the Gooloo GT4000S. My Mustang GT had been sitting with headlights on through the night, and when I tried to start it, the battery was completely dead. If you’ve ever dealt with a Mustang GT, you know it’s not exactly easy to jump-start the 5L engine. I was skeptical about whether a portable jump starter could handle it, but the GT4000S proved me wrong. It was incredibly easy to use—straightforward instructions, quick setup, and no fuss. When I connected it, I wasn’t expecting much, but to my surprise, the Mustang fired right up as if the battery had never been dead! I honestly couldn’t believe how effortlessly it worked. What impressed me the most was how quickly it charges and how it still had 91% charge even after jump starting my car. It’s not intimidating to use, even for someone who isn’t overly tech-savvy. Plus, the safety features (like spark-proof and reverse polarity protection) gave me peace of mind throughout the process. It’s now a must-have in my trunk. If you’ve ever been stuck with a dead battery, you’ll understand how valuable something like this can be. It’s a great feeling knowing I have a reliable backup. Highly recommend it to anyone!

    Variation: Color: Red / Reviewed in the United States on December 27, 2024
  38. Paul M. Kucan

    Can’t beat the price

    Worked like a champ

    Variation: Color: Red / Reviewed in the United States on December 27, 2024
  39. Jason C Miller

    Most powerful! Best jump-starter!

    Absolutely hands down best jump-starter I have used to date!

    Variation: Color: Red / Reviewed in the United States on December 27, 2024
  40. Cam

    It’s saved the day many times.

    I’ve owned a few different jump starters over the years and this is the best by far. Everybody that sees it in action wants one. Would make a great gift for anybody.

    Variation: Color: Red / Reviewed in the United States on December 26, 2024
  41. AD

    Actually delivers, very stout

    I used this a couple of times and it has worked great. This morning I tested it after leaving it in my SUV overnight in 13 deg F (-10 C) weather. I disconnected the truck’s battery altogether, hit the Boost button, connected the jumper cables and the truck (27 year old pathfinder, 3.3L V6) started right up. Afterwards the charge indicator read 97%. Shut it down and did it again without any trouble, again battery totally disconnected. Charge only went down to 95%. Outstanding.

    Variation: Color: Red / Reviewed in the United States on December 23, 2024
  42. Ray T.

    Excellent Jumper Sized to keep in your vehicle for Emergencies.

    Compact jumper with extra capabilities that fill my needs.

    Variation: Color: Red / Reviewed in the United States on December 22, 2024
  43. Wilson

    Clutch

    Worth it.

    Variation: Color: Red / Reviewed in the United States on December 21, 2024
  44. MTelk

    Box condition in bad shape

    Haven’t had a chance to use it yet, but it seems to be in good shape. Seen good reviews on this product.

    Variation: Color: Red / Reviewed in the United States on December 21, 2024
  45. Thomasina R

    Good!

    Like this one better than the one that got stolen-and it was as nice as I could find in a store. Ordering another one.

    Variation: Color: Red / Reviewed in the United States on December 21, 2024
  46. j. martinez

    This is compact but powerful battery booster

    I boosted a 5L diesel engine with the booster smaller than a loaf of bread.

    Variation: Color: Red / Reviewed in the United States on December 20, 2024
  47. Vette Driver

    Powerful jump starter

    If this won’t start your vehicle, then nothing will!

    Variation: Color: Yellow / Reviewed in the United States on December 20, 2024
  48. Jerry W. Smith

    Was a xmas present.

    Sent to Sister who lives far from town. Told me it gives her comfort!

    Variation: Color: Red / Reviewed in the United States on December 18, 2024
  49. steven

    Missing air compressor

    I’d figured would also come with an air compressor this in a way is disappointing

    Variation: Color: Red / Reviewed in the United States on December 16, 2024
  50. Henry Cook

    Nice Jump pack

    Great price, very functional, works great

    Variation: Color: Red / Reviewed in the United States on December 16, 2024
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