Rexing - 4000A Jump Starter, 12V Car Battery Booster with 65W Quick Charger

I recently purchased the Rexing 4000A Jump Starter and so far I’m very impressed with it. The unit feels solid and well made, not cheap or flimsy like some of the other jump starters I’ve seen. The LCD display is easy to read. One of the things I really like is that it’s more than just a jump starter. The 65W fast charging feature is great for charging phones, tablets, and even laptops while traveling. The built-in flashlight is also a nice bonus for emergencies or nighttime use. Heres what I think stands out about this charger most, is the fact that I can remove the jumper cables and store the unit in the case, if you’ve owned other car jumpers, then you know that the cables cant be removed. I tested it on my Jeep that had a dead battery and it started the car quickly without any issues. It gives peace of mind knowing I have this in the vehicle in case of an emergency, especially during winter or long trips. The carrying case keeps everything organized and compact, and the battery seems to hold a charge well. Overall, this is a very useful and reliable product that every driver should consider keeping in their vehicle. This is the BEST Jump Starter that I own. Thank You Rexing for putting out such a great product!

Excellent quality jump starter. Very easy set up, easy to use and very versatile. Two cords come with the unit, USB-C to USB-C and USB-C to USB. The unit itself had one USB-C plug and two USB plug in’s. The flashlight alone is worth the purchase. The jumper comes with a very nice soft side case to contain the unit, jumpers and the cords. The size is larger than some of the other small options but much smaller than the old jumper boxes. This jumper does the job intended without question. This Rexing jumper lives up to the quality you would expect from a Rexing product.

I purchased this Rexing Jump Starter to boost my Kubota construction equipment and my Ford F250 diesel which has a battery drain problem. Rexing has three different models: the 2000, 3000, and 4000 amp versions. I went with the largest one because the diesel engines have high battery drain from the starter motors. The package arrived from Best Buy 2 days ahead of the expected delivery date which was great. Inside the box are the booster unit, a set of jumper cables, a USB C charger cable, and a USB A charger cable. There are two USB A plugs and one USB C plug on the unit for connecting your devices which is handy. The USB C plug also doubles as the charging port. My unit arrived with 73% charge on it and in less than an hour it charged to 93% charge with a 20 watt USB C charger block. The light is very bright and activates by holding down the power button and quick presses of the power button turns the light from steady to SOS and flash modes. This feature is very nice if you are stranded on the road at night. The display is awesome showing percent charge remaining, output watts, boost mode when activated for the jumper cables, and which ports are sending or receiving power. The unit itself and all the cables fit very nice in a zippered case which can be easily stored in the trunk of your car. The real test of a jump start booster is how well does it boost. As mentioned before I own several types of diesel equipment that are not frequently used. My Kubota excavator is five years old with the original group 24 battery. After a long winter of no-use, the battery would not crank the engine. I connected the Rexing Jump Start and it cranked right up! I took a photo of the booster connected to my excavator but could not upload the video which really shows it in action. I am sold on this product which is much easier to connect than driving my truck up to side of the equipment to boost it with jumper cables or trying to run a battery charger overnight while it charges. There is no electricity at my pole barn so trying to connect a battery charger would require me to get a portable generator to connect the charger to. This portable booster is way more convenient! My truck battery is holding a charge (for now) so I could not test the Jump Start on it, but I suspect it will work as well as it did with the Kubota equipment. Although this booster would be good as a backup USB charging battery and an emergency light, it really shines as a battery booster for your auto, lawn mower, or heavy equipment. As already mentioned, the booster worked great getting my Kubota excavator cranked with a dead battery. I highly recommend everyone keep one handy should you experience a dead battery.

This is a really high quality jump starter, Rexing is really trying to vie for title when it comes to measuring up to the leading brand. In terms of construction, this is a heavy-duty unit that feels and weighs substantial. 4000A is a huge battery and this is guaranteed to jump start the bigger motors that are out there. Alternatively, if you don't have a larger engine, this can power your electrics for a longer period of time since it's 4000A. The charging cables are also high quality and the gauge of the wire should definitely suffice. The nice thing is that the pair is terminated in a plug which allows for a direct connection without having to deal with a separate positive and negative plug. In terms of the ports, you have everything you need as well, with the various USB A and C ports to be able to charge whatever it is you have on hand. And at 65w, it's quick enough to charge your laptops as well. The carrying case is a nice tough to ensure that it's easily portable. The display is also easy to read.

Excellent jump starter. Feels and looks solid. Easy to read display. Even shows the watts being used along with battery percentage. Nice zippered case keeps everything in one place. Only negative I see is that it is bulky, but that doesn't bother me one bit.