Car Battery Jump Starter 4000A Jump Box (8.5L Gas/8.0L Diesel), Jumper Starter Portable Car Jump Starter Battery Pack with Extended Smart Jumper Cables, Quick Charge, Large Display, Lights

To be honest, I managed to charge it to 98% before I had to use it 3 times or so. Now, to be fair, tbe "force" button is easily found, but difficult to push (Think the reset buttons on your electronics or better yet the sim tray eject button on your smartphone). Might have to leave something in the case should it ever need used.The jumping cables do have a good length to them, I just had to separate the wire insulation from each other to get proper separation to reach the posts.Haven't used any function other than the jumping, other than a quick assessment to make sure everything functioned at arrival. The looked promising, but wasn't the number one reason for purchase.The case is sturdy, everything fits well inside and appears snug, and the hard sides of the case protect the plastic unit parts well from inevitable travel damage. It even has a wrist strap to carry or hang it from. I just have difficulty getting it around my wrist easily, but it doesn't detract from anything.Probably about time for a "maintenance charging" since it's sat a bit, but the jump start capability is awesome. From the 98% initial charge it started a truck with a barely dead battery, and not 30 minutes later jumped a CUV with a battery around 6 volts twice.The amazing part was that by the time I connected it to the battery and climbed into the cabin, it was already powered enough to start the vehicle. I've had to exchange batteries to see jumping done that fast. But it did it that fast on each vehicle, and still had well over 80% battery life.It's worth every penny no matter what you pay, but if you find it at a sale price then you can say you practically stole it and be proud of it.

This jump starter came 70% charged and took full charge in about hours. I used it one time so far to jump one of my cars and it worked great! Power dropped to 79% after jump and recharged to 100% in hour or so. The unit comes is a good zippered case and seems to be well made. The power light is easy to read, phone charge port worked well. Battery post clamps have good clips and strong grip. Flash light is bright in all three settings. All in all I would say great value for the cost.

I don't drive very much, yet I have two cars. Ever since I got a nice convertible, I rarely drive my older hatchback, yet I keep it (so far) because it's better for hauling things than the sportscar. But I drive the older car so little that it often needs a jump before it will start. The most recent time, a passerby told me about jump boxes. The appeal of popping one hood and one battery cover - not two - is obvious, as is the convenience of not having to be very careful to keep the destination clips apart after connecting the second source clip.There were a lot of options, but I picked this one because it has a flashlight and enough capacity to jump my car twice if the errand doesn't charge the battery enough. I just used it for the first time: it worked fine, and definitely was easier than hooking up another car.It comes with a nice, semi-hard case and seems well designed, with clear displays on both the power bank and the 'clip adaptor' (the part with the alligator clips, that plugs into the power bank via a nicely asymmetric plug that can't be inserted upside down) and waterproofing flaps on the various ports. The cables from the device to the clips are rather short, but they _are_ long enough to connect to the battery and the grounding lug on the car's frame.I'm happy with my choice: I don't need a 120 volt outlet or an air compressor, and this model is more than beefy enough for a four cylinder, 2L gas engine. Those of you with trucks may prefer the higher capacity "Beta05" model - https://www.amazon.com/dp/B0D83PJXYJ

So I bought this after a neighbor had a dead battery for a couple days in a row and thought I travel a lot and it would be good peace of mind if I ever wind up with a dead battery or parked somewhere where another vehicle couldn’t get to me well shortly after buying it my neighbor went and got a new battery so it wasn’t able to test it out on their vehicle and I thought there’s gotta be a way to test this without having to wait until the return date expired and I find out that it doesn’t work so I decided to disconnect the battery cables from my truck in order to try this jump starter out and to my amazement it worked out spectacularly and hardly weighs anything and if you don’t have a flashlight with you. It has a decent flashlight for being in a pinch. I’m not sure how well the battery life is as I’ve only owned it for a few days, but it charges flawlessly and it weighs almost nothing. My truck fired up as soon as I connected the battery jumper to it with no issues at all I’m extremely satisfied and frankly surprised at how well the product work for the price I’ve seen similar battery jumpers on here for anywhere from $100-$200 and $40 is not a bad price for solid piece of mind, especially living in northern Wisconsin where our weather can definitely drain batteries in a matter of no time it also comes with a really nice convenient case to keep it in and transport it as well as separate zipper pocket that the battery clamps snoring