Portable Jump Starter 4000A for Gas and Diesel Engines with Smart LCD Screen

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1. Eric Verified Buyer – 17 March 2024

   I ordered this specifically for the jump-starting feature, but it really functions as a high-capacity, high-powered power bank that is also capable of jump-starting a car. All of my devices can be fully charged (multiple times) via the USB ports. And it also has a very bright, very capable built-in flashlight, which also has two different blinking patterns (great to alert passing cars of a roadside break-down/distress situation). And every jump-starter I’ve ever had has been bulky and heavy. But not this one. It’s very compact and (relatively) lightweight, and the carrying case makes it especially easy to carry and store anywhere. And because it is compact and lightweight, there is never going to be an issue in being able to easily reach a battery, as the jump starter can simply be brought right up next to any battery’s location in the car. With the other jump starters I’ve had, because they were bulky and heavy, there were instances where it definitely was not as easy as it should have been to get the jump box close to the battery. But this jump starter is very easy to use, and the digital display clearly communicates the amount of charge remaining and the status of the tool. Overall, I’m very pleased with this jump starter. I think it’s an essential tool to have on the road, and I will get almost daily use out of it, even if I never (hopefully) have to jump start a car with it.
   

2. Neophite Verified Buyer – 18 May 2024

   This has been in my car for several months at mostly subfreezing temperatures. It has only lost 5% of it’s total charge during that time. Seems quite good, easy to follow instructions. So far I have not had to jump my car, but I have used it for USB charging on occasion which it managed fine.
   

3. Annette Verified Buyer – 23 May 2024

   Now this is a heavy duty jump starter. Very easy to use. I jump started my friends cargo van that has an extremely large battery and it started up in seconds. The jump starter came fully charged and after one jump start and 3 weeks of charging multiple phones an iPad and a couple of Samsung tablets daily it finally died. It took 2 hours to fully charge the jump starter. Comes with 2 regular USB ports and a USB C port which can all be used to charge other things. The C port is also used to charge the jump starter. The LCD screen makes easy to know when it’s ready to use. Love it a must have.
   

4. Nana72 Verified Buyer – 3 July 2024

   Perfect. I ordered it to keep in my vehicle for emergencies and I already got to use it. A friend needed a jump after church and it worked great! Vert compact and easy to store. It was easy to use and I was thoroughly impressed.
   

5. Ryan Thompson Verified Buyer – 22 July 2024

   I recently adopted a 14-year-old Australian Shepherd with hip arthritis. This bed is his favorite. It cradles him and is soft and easy to get in and out of.
   

6. daren blunt Verified Buyer – 15 February 2025

   I have several of these. This is the latest I got. I have tried it with multiple vehicles. This works great for my tractor, UTV, and my wifes car, and my larger V8 Classic Bronco. We are talking about 900 CC engine, 3.0 liter gas engine, and a 400CI V8. This jumper works great on the small engines, works OK for the V8, bit of a slow spin though. I imagine it depends on how dead your car battery actually is. One thing this jumper would not do though, it would not spin the starter on my 7.3 liter Diesel fast enough to get a start. I would recommend something more powerful for an engine that large. It is handy, charges back up pretty quickly , inside a couple hours, and you can charge it in the car. It’s also small, comes with a storage case, and fits nicely in the car, out of the way. Price is also pretty friendly.
   

7. Last Preatorian Verified Buyer – 21 March 2025

   Absolute must to have. Stores easily in your car. Rechargeable. I have used it so many times . I have left my lights on, couldn’t start car after having it sit for two weeks at the airport while on vacation, kids left a light on in the inside. Easy to recharge, small compact. Don’t have to keeps cumbersome jumper cables in the car. Easy for teenagers to use.
   

8. Prime Shopper Verified Buyer – 21 April 2025

   This works great as a giant charging brick. Easily provides power to our 5volt (up to 3amp) devices and charges my kids phones on long trips. I almost had the opportunity to use it as a jump starter but, by the time I got there to assist, someone already helped the person. Oh, well. Still looking for that opportunity. The case it comes in is compact, organized, and sturdy. The clamps are nothing to sniff at either. The springs are strong and the cables themselves are a heavier gauge than I expected. Overall, based on my impressions of the quality of parts used, the system looks like it is capable of jump starting a standard sized engine.