GT4000S Jump Starter 4000 Amp Car Starter 100W Two-Way Fast-Charging Portable Car Battery Charger Booster Pack for 10L Diesel and All Gas Engines, SuperSafe Lithium Jump Box for 12V Vehicles

I saw this reviewed on YouTube from a creator called "Project Farm." He does some of the best real world test reviews out there. He tested 14 jump starters, including the Gooloo. The Gooloo jump starter came in second place overall and it was just $99. The first place jump starter was $370. An almost 4 times price increase for just a little improvement over the Gooloo jump starter. It arrived well packaged and included a ton of accessories. The Gooloo lets you jump start your car (which was super simple and worked great). But, it also has a built in light with several illumination patterns. I has two USB A output ports for charging your devices. A USB C port for charging the the Gooloo internal battery. The same USB C port can also be used as an output to charge your own device. It charged my video light at an amazing 40 watts (see my photo below of it charging). It also has a DC out port at 15V. There is a female cigarette lighter for the DC out port. However, I think 15 volts is a little high form some devices meant to run at 12 volts. So use caution. There is also a male cigarette lighter with a male USB C plug so you can charge the Gooloo from a standard cigarette lighter socket. There is a USB A to USB C male cord and a double male USB C cord included. This is a very complete package. I charged the Gooloo to 100% and then did a test start on my 4Runner. My 4Runner has an older battery that I am too cheap to replace. I tried to start the car, but it just went, "click, click, click." So I hooked up the Gooloo jump starter and it fired right up. Not only did it start, it cranked the starter with authority. As Project Farm would say, Very Impressive! The size of the Gooloo is larger then most jump starters. But, that is because it has a massive battery inside which provides the excellent performance. But, it is not too big to be cumbersome. Everything fit nicely into the provided storage bag. The instructions were very clear and simple to understand. Overall, I am super impressed with the Gooloo jump starter.

Holds charge for long time, months and works great although the bi-directional charge cable quit working after only a couple uses.

Watched Project Farms video on YouTube comparing these jump packs and this one was highly rated. Had to give it a try and can’t say I’m disappointed! It’s absolutely amazing, super user friendly, and has successfully started anything I wanted to. The price is also super appealing for the performance it offers in a small size. Definitely get one!

The GOOLOO GT4000S Jump Starter absolutely blew me away. I honestly can’t believe something this small can start a vehicle with a completely dead battery — and not just once, but multiple times on a single charge. It’s compact, easy to use, and incredibly reliable. The clamps are sturdy, the display is clear, and the whole process takes seconds. This is one of those tools you buy hoping you’ll never need it, but when you do, you’re very glad you have it. Whether it’s for your own car, a second vehicle, or to help out a stranded neighbor, this jump starter is a must-have. Totally worth it!

I found out about the Gooloo brand on YouTube (Project farm). At a price that's 1/3 of the NOCO charger he tested, this is a very powerful unit for a much more reasonable price! I'd really give it a 4.5 if I could; knocking it down .5 of a point since Gooloo doesn't include a wall charger. No worries I have a 2 amp wall charger that is more than powerful enough to get the unit to 100%. Very pleased with the first use! It started my car right up. LED display is a great feature. DC output is a nice feature if you need to power other 12 volt tools. Don't buy the $69.00 Gooloo 100 watt wall charger; there are many other 100 watt wall chargers available on Amazon for 1/3 of the price. Update: It's now 29 Nov 25, and the unit is totally dead. I've contacted [email protected]; I'll report back when I hear from their warranty department. Fiona at Gooloo stepped addressed my warranty issue, and I had a new unit in 5 days. Excellent customer support; I hope this new unit lasts longer!

Bought it after watching Project Farm on YouTube. It works great and I've used it a lot on my farm. From vehicles to lawnmowers and even my tractor it works good. Another handy use for it is to put it on a dead battery then hit "BOOST" until it beeps then remove it and put your battery charger on it. Most of these new digital battery chargers want to see some voltage on a battery before they'll work. Handy lightweight simple and powerful. Keep an eye out for a sale if you're not in a hurry. These GOO-LOO jump packs go on sale pretty often. I'm not putting in keywords for A.I. just so you'll look at my review but it looks like a couple of them already lit up. Have a great day. 👍

Based on build quality alone it seems like a good unit. Haven't jumped anything yet, but some observations. It charges very fast on a 100w power adapter. Less than 45 min. Mine came at 75% and I bet it charged to 100 in about 20 minutes. I also ran it as a power bank to power a laptop at about 60w. It does not seem to hold power very well as a power bank. Seems to drop power fast. The bag is junk, the box they send it in is better quality then the storage bag. Just throw the bag out and store it in the box. I cant see right now buying the storage box for an additional $25 4 stars for now. Once it gets some use I will update the review.

I have used it several times on completely dead truck batteries and the trucks have always started effortlessly. I have only had to charge it once after many uses and that was because the light accidentally turned on when storing it in the map pocket of my truck. It would be nice if the cables were longer and if the charging block was included. The size is perfect and it stores just about anywhere. It's so much easier to use than jumper cables and has worked on different size vehicles easily.

The real deal authentic and original very good bought the first one and my friend took it then I bought the other for me. I charged 3 phone twice and used it to jump the car battery work perfect

تمت تجربتها لأكثر من مرة على سيارة صديق ، كانت ممتازة واشتغلت السيارة بدون مشاكل ولم تسحب من بطارية الباور سوى ٥% في كل إشتراك وأراه معدل نزول جيد.