AUTOONE 4000A Car Jump Starter, Battery Jumper Starter Portable for Compact Car Up to 10.0L Gas and 8.0L Diesel Engine Jump Box with Jumper Cables, USB Output and LED Light

This is awesome. Powerful, compact, and sturdy. The AutoOne has a very long battery life. I've used it four times on coworkers vehicles and it is at 50% power. It is currently recharging, which takes about 4 to 6 hours for a full charge. The clamps are we'll made, with a strong spring and I like how they loop the cable inside the clamp to help prevent it from being pulled out. There is an led indicator on the clamp plug that tells you if you have a solid connection to the battery or if there are problems that need to be corrected. Works quickly, attach to battery, turn on, and instantly start most vehicles. It may have trouble starting heavier duty trucks, but is great for passenger vehicles. Smaller than a set.of jumper cables, and in my.opinion, safer. Includes a bright, built in flashlight and small compass on the case.

Works like it should! Great quality. I’ve used it often. For either to jump off a car, or charge my phone battery if I’m outside. Flashlight works great as well

Every gasoline powered car should have one. It's very handy and works quite well and easy to use.

Another great product from a brand I'm really starting to like. Got their lighting in my vehicles and like them a lot too. This product is nearly a daily use item for me due to the multiple functions it has. It charges up quickly, and I primarily use it as a great charging bank. Lightweight and compact I have no issues fitting it in a pocket or bag. It charges connected devices quickly as well. This battery pack has the added peace of mind that most do not, it is able to come in very handy if mine or another person's car needs a jump start. Thankfully I have not had to use it, but it is similar to another jump starter that I have that works unbelievably well so I'm sure it will do just fine. The other features like the light and compass have come in handy as well, with the light being nice and bright and the compass being accurate.

Slow to charge it up. Worked great when it finnnnaaallly charged

I have a 2012 genesis with one of those large batteries. Larger than most cars. It was sitting since February 2024. This AUTOONE jump box comes 2 USB A output charging ports, USB c input to charge it, flashlight carrying pouch, and compass lol. It does not come with a power brick to plug into a wall jack. I used the one from my ring light I got on Amazon as well. It tells you to charge it first and I did but I did not wait until it was full. The AUTOONE was at 75% when I impatiently decided to give it a try. All you have to do is connect the connected to the box in the port with the car picture. Connect to your battery terminals. The light should turn solid green and it makes a clicking sound. It's a slow methodical click. Head to the driver seat and start the car. The AUTOONE worked on the first crank. I see these jumpers at Costco for $99. Or you can see there are some on Amazon for upto $200. This one is just fine and I was so happy in the end. Ultimately the design of this jumper is compact, The battery life didn't seem to change from 75% after starting and is a bang for your buck.

Solid jump pack for a good price. Can’t complain

This is something everyone should have. It has saved me numerous times. I’m amazed at how long it stays charged and how easy it is to use. I’m so thankful for this product.