Lamar S.
It’s a very good tool to have
Chuck D.
Not sure it is as good as some of the more expensive chargers
Charles S.
I use this magical device on everything from go carts to lawn mowers, all of my cars and even the hearse and limousine. It has never failed to get the vehicle running. Never fear, GooLoo is here!
Tim R.
Have not needed to use it.
Gary B.
It works so nice. So convenient...love it.
Will
The GOOLOO GP4000 Jump Starter is a top-notch portable battery booster designed to handle up to 4000A peak, making it ideal for gas engines and diesel engines up to 10 liters. Its robust 12V lithium battery ensures reliable performance, and it comes with jumper cables for ease of use. This jump starter is built with safety in mind, featuring multiple protection mechanisms to prevent overcharging and short-circuiting. Compact and user-friendly, it��s a valuable tool for anyone needing a dependable boost on the go.
Walter
I was very skeptical about this battery jumper. After I got it I was reluctant to even trying it for fear it wouldn't work as described. I know that sounds stupid but past experience with other products made me this way. When I did try it I was absolutely blown away with how easy and perfectly it worked. I got so excited that the experience of jumping a battery was fun. I now look for any opportunity to use it. I saw some guys trying to get their car started with jumper cables. They had been struggling for a while. I walked over with my GOOLOO GP4000 and instantly started their car in the awe of everyone. Love this tool.
Cjhest
I bought this because I was tired of having to use jumper cables and needing another vehicle nearby to jump me. I used it a couple of times last year and it saved my bacon.
This year, the battery in my daily croaked, the battery in my winter beater died, and the battery in my wife's classic car (12v converted) also took a dirt nap. The 800 cranking amps easily started a 283 ci V8, a 5.7L V8 Hemi, and a 3.6L V6 multiple times per charge.
I highly recommend getting one of these.
Tilly
A purchase like this typically starts with a dead battery. My car's battery appeared to be drained (and with an older car, that's easy to do). I needed a jumpstarter backup, FAST, so I ordered this GOOLOO and although it was able to successfully start the battery with the GOOLOO, the charge was very brief. The GOOLOO's basic diagnostics confirmed that the battery was essentially dead. The AAA assist guy confirmed the diagnostics -- DEAD battery.
I replaced the old battery, repacked the GOOLOO in its storage kit and now keep my GOOLOO in my car for any future jump start needs (mine or someone else's). Ready to go!
One of the GOOLOO features I really appreciate is that you don't need LONG connecting cables draped across the car. No more connecting someone else's car battery to your car battery -- just position your jump starter close to your car's battery, attach, charge -- go!
Another good feature is its ability to recharge your mobile devices. When you can't drive around to recharge your phone or laptop, the GOOLOO may be your backup plan.
Tip 1: READ THE AND FOLLOW THE DIRECTIONS for safe connecting and jump starting!
Tip 2: I live in an area of seasonal temperature extremes so I'm mindful to not leave the GooLoo in the extremely hot or cold car full time. In those seasons, take it inside and place it near the door leading out to your car for a quick grab-n-go with your GooLoo.
Tip 3: Set a reminder to check the GooLoo's charge. The re-charge is not very fast, not very slow. It just takes time. My mobile devices have this reminder set for every three months, or go old school and put a reminder on a paper calendar -- whatever reminder system use -- use it to make sure your GOOLOO is always ready to charge.
I'm pleased with the GOOLOO jump starter. It has given me greater peace of mind for my car (and even my mobile gear).
Dennis
The battery on my truck had died and i had no jumper cables. I had always wanted to try this tool so i ordered it. It arrived within a day and i had a trip to the airport the following day. It came charged so i jump the truck that evening before. Then the day of me leaving for the airport. I had to make an stop before the airpot. So i jumped it again. Then after my trip i jumped it again at the airport. Then i jumped it at the Walmart where i purchased the new battery. So i jumped the old dead battery several times on one charge and it still has 4 out of 4 bars of charge!! I will be buying these as gifts for buddies and as grad gifts. I know probably lame for a grad but they will thank me when they have a dead battery because they do not have to rely on someone else for a jump.
Juvat
Received the new Gooloo GP4000 today. Unpacked, saw it has 4 of 4 charge bar strength. My truck is a 1997 Ford F250 C/C 4x4 7.3L PSD, and its 6 year old Duralast batteries were to weak to start. Connected the Gooloo GP4000 and truck turned over fast. Started the engine with no problems. The GP4000 was now at 3 of 4 charge bar strength. Charged it up to 4x4 with my PC's GPU usb-c port. It charged to 4x4 in about 20ish minutes. This one test let me know the GP4000 is a beast of a jump-starter. Carefully placed the GP4000 in its convenient carrying case and stored it my truck. I ordered a UGREEN 100W USB C Charger. It should arrive tomorrow. I will store in the same case as the GP4000 for future use.
DALE B.
It would be a better design with shock (drop) absorbing shielding on the case. I haven't used it yet but it definitely charged and I expect it to work when needed.
Penny T.
I received the charger and put it to charge. I have not had to use it yet. I am confident that it will perform as it should.
Thank you for your quick response to my order!
Michael H.
Drive a semi have jumped it 3 times no problems..5 star
Gary L.
I love the one I bought directly for you but I never got the one I ordered from Tic Tok. Think that one was a slam.
Pedro E.
I had to use the device twice to start my car due to a battery failure. Worked flawlessly.
randy o.
this is a great tool you can jump anything with it. You can use a diesel pick up and it doesn’t work near as good as this good job guys.
jerry f.
Like it, but haven't actually used it yet. One problem I have is how to get it all back into the case. Either provide a larger case, or a picture of everything should go back into it.
Charles M.
I've only used it a few times so far but worked flawless.
Joseph J.
This is my second GooLoo 4000. I keep one in my car and one in my wife’s car. It has never failed to jump any of my vehicles.
Nick R.
It works perfectly, exactly as I expected. This is a quality product at a fair price that I would recommend to anyone.
Terry W.
Works awesome used it in Canada a guys boat battery went dead hook it up motor started right up I was impressed with it power
Tim S.
Don't have any photos but used it to start model 65 Massey Ferguson tractor. Have several riding mowers to use it on and nice to have charging port available plus flash light. Great item!!
Paul A.
The jumper works perfectly! I highly recommended this charger!
Greg Y.
The best one I've used yet. Hooked it up to a completely dead battery and it started my vehicle like it had a new battery. Very Happy!
Harold M.
Built Very well and durable
Dan H.
Works great! Done everything that I wanted it to starting vehicles
Paul J.
Of course we bought our Gooloo GP4000s in case of dead car batteries. And even though we haven’t yet had to use them in that way, I am confident that they will excel at it when needed. They come very highly reviewed, and they look great and feel very sturdy. I have already used them to charge my tablets and to run fans, and that is an easy job for them.
I want to add that the Gooloo customer service is top notch. There was a problem with delivery, and even though it was not Gooloo’s fault in any way, they set it right! This is a great company and I will do business with them again!
Bruce C.
Works great started my lawnmower and my 5.9 Cummins without a hiccup love the gooloo GP4000
Paul C.
This product is awesome! Everything I expected and more
Stravinsky H.
Haven't used it yet
DAVID R.
first one I bought worked fine. 2 I just bought are my other vehicles.
Donna W.
Had a dead battery, started it when I took it out of the box, had 3 bars.
bowens c.
excellent service and product!
juan c.
Is an excellent tool
Bob
Simply amazing.Started this truck on the first try with a dead battery. I am impressed. Quick hook up and gave me two minutes of crank time. The device had also been sitting in the cold for three months prior to operation.
Isabella Morris
I bought the GooLoo 4000 in early summer of 2023 and haven't really needed it as a jump pack until February 2024 to start my Ram 2500 V10 Magnum. The ignition switch is a bit worn on the truck and it had stayed on and drained the battery dead as a doornail. My GooLoo hadn't been charged since summertime, but it showed that it was still fully charged. I hooked it up to the truck's battery and pressed the boost button. I turned the key on the truck, and the 8.0 V10 fired right up. The GooLoo 4000 does everything I needed it to do and I am 100% satisfied.
Ethan Anderson
Tried two different times to jump start a vehicle did not do it I just use it now to charge phone and I-pad
Eric W.
I spent more to get a high capacity and glad I did. After charing up which tool a few hours it easily started this Lull machine several times and it still does need to be charged. I highly recommend this and also plan on getting one to keep in my car!
michael H.
Unit works wonders....i have a Towing & Roadside Assistance Business and i have large jump boxes that i have used for years and prior to purchasing the Gooloo their were times i had too use 2 of my jump boxes and with the Gooloo that is all i need, Also on my tow truck that has 2 batteries that are 8 years old and between fair and bad condition when i use the Gooloo thats all i need to jump start it but when i use my normal large jump boxes i have to hook both of them up one to each battery and it still struggles to start my truck and with the Gooloo it starts immediately....id 200% recommend this to everyone.
Philip Howard
A must have for running a farm
Dale B.
I've only had it a few weeks, but there was an electrical issue with my car last weekend and was met with a dead battery. The GP4000 turned the engine over faster than the car's battery.
No disappointments!
Eleanor S.
I love it, I am a 74 year old widow. And a friend used one to start my suv. It worked so well l got one so easy to use. It has all ready paid for itself. Not having to wait for help EJS
Ron Ramblin
These things are such a lifesaver. Just the peace of mind having it in my vehicle while it's parked at the airport for a week is worth the price. I have a couple of these & this one is about 30° larger but with more than twice the starting current & 4x the peak current. The leads are nice & long so I don't have to leave it dangling off a motorcycle while boosting. The clamps are large & easy to get a grip but the metal that actually goes on the terminals is tucked way inside the plastic so they are very hard to put directly on a battery with side terminals.This booster hasn't failed to start anything I have put it on. I did notice that it got pretty hot after a while. It also takes a long time to charge.The storage bag for this booster is very simple & large & that is a main reason that this booster has become my go-to when I know I am going to need to use it. The bag does not have any protection, though, like some of these sets. It also doesn't come with any accessories like a 12v car cigarette lighter adapter though it does have a port for one.These are great little power sources for charging or running small electronics. I was able to power my portable satellite radio & a usb speaker on a picnick table on a camping trip. This has my favorite USB-C for charging & output. It also has 2 USB outputs, 1 is regular 5v & the other can go up to 12v but I don't have anything that requires that. I have noticed that some smaller devices won't charge off the USB or USB-C ports presumably because they don't pull enough amps to be detected by the device. I really haven't used the light much because it is it isn't particularly bright, faces 1 direction & isn't particularly easy to switch on. A lantern style light with a dedicated switch would be better.
Brent F.
I just got this so I haven't had a chance to use it yet. I'm mainly just adding pictures at the moment. I will update this review later on with my experience with it when I do use it. So far though, the build quality seems decent and It comes with a nice case that should help keep it protected in the trunk.
Michael L.
I gave it a five stars because of the quality. However, I think the company should offer the the yellow case along with the yellow charger. Don't understand why is there a read case to go with the yellow charger.
Mark
3 batteries semi was dead enough the lights were off, magically it jumped it, cables got hot but it worked, so impressed, I've had mine for almost 2 years
patrick c.
the device came well wrapped. it charged up to full charge, i am very happy with the service. i still have to use it when battery goes flat. Company service excellent.
carlucci c.
Works better than expected, I would recommend .
Jackie S.
Needed it and it worked great.
Mike W.
This is the fourth one I’ve bought. One for me and the others for gifts. Still top notch. I would rather support made in USA products but everything about this unit is so good I couldn’t justify not buying it. I’ve used mine about a dozen times, including some extreme situations and the rigs have fired up immediately every time. Time will tell if it holds up well but so far it’s been a gem.
David H.
1st day I got it charged it took it to WK with me and after WK my co worker left his lights on battery Dead I pulled out my portable Jump starter and BOOM! 1st Try stared right up he want to give me Money instead I said keep and buy you one GOLOO PORTABLE JUMP-STARTER!
James Lee
As an automotive technician I have used plenty of jumper packs, this one is by far the best of them all to jump dead batteries. The conventional jumper packs I have takes two to jump dead diesel batteries, you only need one GOOLOO 4000 to jump a dead diesel batteries. A little over a year my GOOLOO jumper pack internal battery swallowed up and failed. I contacted customer service and talk to Fiona gave a few details of what went wrong and with no hesitation they sent me a replacement one. Outstanding customer service! Thank you so much Fiona for your help from a pround owner of three GOOLOO 4000
Bill A
This portable battery is a vital part of the things you need to keep in your car.This battery can start your car if you break down anywhere. It carries a full charge strong enough to start any car. It��s easy to use and comes with attachments that can clip right to the battery just like jumper cables. It does take a full day to fully charge.But this is something you don��t want to be without. This is going to be as important as a spare tire in your trunk.The clever design also includes connections for USB. So if you wanted to you could charge your phone at an event where you can��t find an Electrical outlet. Highly recommended.
Mike W.
Stout little unit. Easy to use and has enough power to start a battery that’s been sitting dead for a couple months. Worth the money.
Davide W.
It does the starting car quickly holds up 3rd one that i got for me and two kids with case's great products Davide from NEw Hampshire thanks again
Aaron B.
Fast shipping. Perfect storage case for hiding this under the seat with all accessories. Super strong and can easily jump any car or large truck. Super product and great price.
John S.
Quite a bit of power in that little box. I gave it 4 stars because of the boost function. I'd much rather have it sending 100% of it's power 100% of the time without having to mess with pushing the booster which only lasts for a few seconds.
Aaron B.
Shipped quickly and came packaged very well. Opened the box to find it was already charged! Easy to use and a life saver for anyone who travels a great deal. Excellent product and came with its own charger cord and carry/protective case.
Matthew S.
With an odd brand name and coming from a country often criticized for poor manufacturing standards I was pleasantly surprised at the high build-quality. The solid construction of both the main unit and the clamps is immediately evident upon handling. It really does come across as a professional tool. The well-designed zippered semi-soft case is a nice bonus. All-in-all very well thought-out, and seems an excellent dollar-value, especially with the year-end discount. It will shortly be starting a sitting RV with a Ford 460 V8, and based on extensive internet reviews I have no worries...
A Paul M.
This thing did a great job but recently no longer charges. If its been off charger and I hit the power button it turns on but wont jump anything and wont charge now. For the 125 I paid for it, it should've lasted longer.Bought it May of 2023 and probably used it 10 times. ???? wish it had longer leads too.
UPDATE: Im upgrading my review to 4 stars for awesome customer service! GOOLOO reached out to me and sent me a brand new jump box kit. I thought I was stuck since I bought it back in May of last year but they have an 18month warrantee, which of course I didn't read. Kudos to companies that still take care of their customers. I am a happy man! Will advise long term on this bad boy.
Charles H.
My friend call me that the truck cannot start the engine because of battery died, he rented for moving the his house. Probably they didn’t turnoff some light.
The 30’ truck engine started with the jump starter very easy.
I just surprised that I haven’t used it recently and not charged recently maybe like a year.
Erik H.
I’ve used it a few times…work great. Has plenty of juice to jump most vehicles.
michael Z.
Puchased for my 1995 chevy pick up and glad that I did, used it the day after it arrived and it worked perfectly. We definitely keep with me at all times. Thank you for a great product. Michael Zigarelli
Matt D.
It’s been very cold for the last few days, my car wouldn’t start, put the gooloo4000 on my battery and it started right up. Very satisfied with my purchase .
debra M.
His and was absolutely amazed by this product. Will be getting more in the future for my kids
Richard S.
Very well rated product which I bought at a great price. I now have peace of mind knowing that I have a jump start option in my trunk when I need it. Thanks, GOOLOO!
Bob
I haven't had to use it yet but it charged up quickly and is holding the charge.
Tracy H.
Build good no use yet
Handsome
I was very skeptical about the power of this jump box. Description said it would work on diesels. I'm AMAZED. It easily started my 6.0 power stroke, and my 310A JD backhoe! Highly recommend this product. Nice case, small size, easy to use, great price. What's not to like?
Valerie S.
Has the power to jump star the vehicle I can tell the difference from other jumpers in the past this one is powerfull. You get what you pay for is true.
Wise
I would argue that this product pays for itself the moment it bails you out of a tough situation
Craig M.
Very poor customer communication and poor tracking of order.
Tina
It melted when trying to jump a Truck
Sandy
This unit does not hold charge for long
Only 2.. 4 cylinder gas cars were used and it sat for 4 days not used, it was fully charged before.
Now it's totally dead with the charge indicator light blinks constantly with no power
I have contacted the company, with no replies as yet
Dariush
This little dandy will jump your car, has a flashlight, will power your phone as well charge it, might do other stuff too, haven't checked it out too much yet
Ken
Just when you don't think you need something like this...you need it. We have used this numerous times and when my daughter travels, she takes it with her. It's extremely handy and can be used for many things. We also use it during bad storms and it's never not worked properly. It's a great buy!
Robert K.
Followed call D. instructions, charged it up correctly put the clamp on my battery correctly and car just cranked and then tried the boost option and again nothing. by this time my wife had come home and I use my cables and connected it to her car and my car started immediately. Perhaps I just got a defective piece of equipment. But I requested my money back, I’m gonna have to go through the inconvenience of returning the first one. I’m sure not not gonna gamble on this and have to do it again for the second one. Going to Look at some other brands.
Colin B.
Howdy, ive had this for 8 months. It stopped charging/holding a charge. I contacted their customer support via email but they have not responded. So im stuck with a dead battery unit.
Ora O.
Started a VW diesel car with a bad battery just fine.
zane
This jump pack is excellent. Easy to use with a nice case. Has excellent jumping capacity. On a single charge have been able to jump start a 6L V8 3 times and a 3.6L V6 that uses a 900amp CCA battery and only used one bar of the pack. Really good jumping power and would recommend.
dean l.
I like the size and the power it packs. Jumped my car with ease.
Jack R.
Love the gp4000 so much I bought 2 and have 1 away to keep a family member safe. Battery so strong it COULD run as a riding lawnmower backup battery if needed in a pinch. Never failed to jump anything I needed.
Charles D.
First test i tried starting a fully dead John deere 8370 9L diesel. It didn’t start it but turned over real strong a couple times had a guy in cab who turned the key over as soon as I hooked it up. I believe it would have started if he waited a 10-20 seconds. Fully believe it will start my truck with ease which is what I bought it for
gordon t.
I love it won’t see me standing around stuck, waiting for a good citizen to give me a jump
Douglas P.
I purchased this for my daughter-in-law for her safety. I've been using my 4000 for a couple years now. Its never let me down. I wouldn't hesitate recommending these products to anyone.
Michael S.
Works exactly as wanted. Unlike other products, I was able to start a car with a completely dead battery. First try. No waiting around for the car battery to charge up a bit. It could not be better.
Joseph W.
I bought this only used it maybe four times because you know how often do you jump a car... The charging port is completely wrecked .. the internal piece of the port has metal exposed and doesn't allow for connection to the charging cable so the whole thing is garbage completely useless if u can't charge it and of course thirty day window is closed
.. but the thing wore out with just regular use after only a few charges ...I'm very disappointed especially since I live in the country alone and don't have a job and can't afford to replace this and am now stuck with a dead battery in my car and 200$ wasted on this poorly made garbageb
Ben B.
Very well packaged and seems to be well built. Followed the many many great reviews on YT specifically Project Fm testing.
Diane B.
I have an older Kia minivan that's been sitting in my backyard with a very dead battery for many months. With the boost setting, it started up painlessly!
Tom T.
I haven’t used it to jump start a vehicle yet but I have charged my phone and used the flashlight. So far so good!
Kevin M.
Haven't used it thankfully, but got it for a great price and super fast shipping. I hope not to use it but then again I can't wait to use it hopefully on someone else's vehicle.
Terry O.
So far works great
Kenny B.
Used it four times so far and it has worked great every time.
William C.
I purposely drained my car battery down to about 9 volts to the point the ignition didn't even click.
I hooked this up, according to instructions (important) and my 4.2 liter engine fired up as if I had a brand new battery connected!
Truly amazing!
People here have complained about it not having a wall wort (wall charger) and I have to say that by now, most people have them for their phones, tablets and a slew of other things common in most every house. I think a lot of new phones don't come with them any more. How many does one need? I think I probably have a dozen of them by now.
I would suggest however, that if you need to purchase one, get a name brand one of good reputation! Having good circuitry there assures safety and reliability.
The GooLoo GP4000 is rated tops on line. Even above similar jump boxes costing more than twice as much.
I now have peace of mind in my trunk!
John.H
I bought this based on a comparison review I saw on YouTube by Project Farm. There were units that cost more but the performance in his rigorous testing was fairly equal. I've used it a few times now since I bought it last November because my work truck has a parasitic draw that pulls the battery down if it sits a few days. This booster is twice as big and heavy as the old one I had before and turns the engine twice as fast and still has over 90% remaining power after a boost that would completely deplete my old one.
It also comes with a really nice tough shell carry case and accessories that will let you plug a cigarette lighter plug into it. It will easily power my 20 watt GMRS radio and can be used to charge your phone in an emergency. It's awesome, I recommend it.
![GOOLOO GP4000 Jump Starter front]](http://us.gooloo.com/cdn/shop/products/GP4000-3.jpg?v=1723448152&width=720)
![GOOLOO GP4000 Jump Starter front]](http://us.gooloo.com/cdn/shop/products/GP4000-3.jpg?v=1723448152&width=1)
