Car Jump Starter with Air Compressor, 150PSI 7000A Peak 24000mah (Up to All Gas or 8.0L Diesel Engine, 50 Times) Portable Jump Starter 12V Auto Battery Jump Pack QC 3.0 with 160W DC Out

This is one powerful jump box! My BMW 900cca AGM battery was killed by a bad alternator. It was down to 4.2v and had completely lost all power while driving and had to be manually shifted into neutral even just to get it on the flatbed to tow it home. I didn't even read the instructions for this thing, just plugged in the power terminals, saw the battery was nearly fully charged, and went to see what could be done to the dead agm battery. Within seconds of connecting the positive to the jump post in the car and the negative to the ground post (which surprisingly sparked!), all the previously-totally dead interior lights powered on, the hazard lights resumed blinking as they'd been when last the car had even an iota of electricity coursing through its over-engineered system, wipers kicked back on, screen lit up and went through its check process while key light came on and the pleasant bing of a car waiting to drive happened. I was shocked. I inserted key to accessory mode, everything was good but a slight bit glitchy on the lights. I didn't figure it would start; what are the odds a BMW requiring 900cca just to exist without any bells or whistles could go from 4.2v to 11.8 or higher, enough voltage to actually turn the engine over. And yet....I gave it a shot. Immediately the car roared to life! Astonishing! It did die relatively soon afterward, as was expected. The jump box started beeping when the voltage readout got down below I think 13.1 and I let it scream for a good long minute while I checked the battery itself with my multimeter (now at a 5.6v!) before unhooking it and saw that the jumpbox was down to one battery bar. Still very impressive. I then tried to jump the BMW with my other car, an Audi with the exact same battery. Took 2 or 3 attempts and then a long hold on the start button before the engine cranked enough to turn over. The jumpbox was more powerful right off rip (without even being pre charged!) than my 900cca AGM fully-charged battery that was running in another car! So so so pleased!Edit: Apparently "normal" jumpboxes should not be used on AGM batteries, I read about AFTER using this jumpbox on my brand new AGM battery. When I went out to swap out the new battery from the dead BMW with the bad alternator, I noticed the battery sides were covered in a thin layer of coldish-feeling condensation. Unusual because nothing else in the car, much less the trunk or battery hole was even damp at all, it hasn't rained, and the temps haven't even gotten cold enough overnight for condensation to form on exterior glass, much less a plastic coated battery wall hidden in the depths of my dry, warm battery "bedroom" in the trunk. I also immediately noticed a strong and strange chemically smell I was unfamiliar with and couldn't put my finger on it until I realized that the jumpbox had caused the brand new AGM battery to leak, just like the internet warned me about after the fact. So maybe don't use this on AGM batteries, especially not at full power and just leave it sit there for 10 minutes. Schwoops.

This thing works perfect. It’s very organized and compact. I aired my Tundra tire up in like a minute! Also aired my mtb tire! Digital output is awesome. I’m very happy!

Still new. I just used 3 times.I just need my device WORKING that’s what i pay.I don’t wanna change for nothing different, but i need my device WORKING. THAT’s IT

My first experience was great, this product did everything it said it should , worked for about 4 months, then the unit itself would only charge up to 2 bars, 4 is full. It still worked, but it was annoying. I tried to contact customer service, but being mfg. in China lent itself to some challenges. That all being said, they sent me another unit, no charge, works great, and I am fully satisfied, the only reason I would not give it a 5 way due to the original problem. It is a great unit, compact, well made, easy to use.

Obsessed! Worked easily to get me out a flat tire issue and I've since ordered another for my second vehicle that I take off-road and one for my folks.

I bought it for grandson..it does what was expected plus more..

ORIGINAL:I haven’t used it yet, and hope I will never need to. But just having this in my trunk makes me feel better. I read the How-to, it’s pretty much self-explanatory but it’s nice to have that in the box as a reference. The box it comes in is solid and contains everything you need, and it is actually pretty small in my trunk.I found it loads very quickly, but then it was already over half loaded when I got it. I check the charge every so often, it holds on like you wouldn’t believe, I don’t think I’ll even check again for another 3 months.UPDATENow I would like to give at best minus 5 stars.The dreaded situation happened - my car doesn’t start when I leave the office, I can’t even open the door. Thank god I have an oldfashioned key. The battery is clearly dead a a dodo.No worries, that’s what I bought the battery jumper for, right? No.I take the jump starter out of its storage box, check and it is fully charged. Connect it to my battery and try to start the car. Nothing is happening. Not even the weird „ououou“ sound that you sometimes get when the car won’t start.I leave it connected for 5 minutes, perhaps that will help. It doesn’t.Now I read the little manual several times, perhaps I made a mistake? I didn’t, I did exactly what the manual said.At this point I begin repeating the same procedure that didn’t work the first time, praying for a different outcome. Of course the outcome didn’t change.Two colleagues come by and try to help, they read the manual and do the same thing I did, with the same result. Obviously engineers don’t necessarily know cars any better than I do.After trying uselessly for another 30 minutes I call AAA. Wait time 2 hours.I finally get home at 6:30 pm with smoke coming out of my ears.Over the weekend I ask a neighbor who knows cars if he could take a look. He checks the jumper box for voltage?/amperage? with a little tool and says that it has juice. He doesn’t know why it doesn’t work.I bought this bloody car jumper for one thing only, to make sure I don’t end up stranded somewhere.It failed miserably.I have no idea how to check if an electric/electronic item I buy works, I have to rely on internal quality control of the company.This one was a resounding failure, and of course I only found out many month after I bought it.I am just happy I wasn‘t stranded somewhere unfamiliar after night fall.Avoid this crap if you can. I bought long jumper cables - it’s never a problem to find someone to jump your car, but many people have no cables in their Trunk, or too short ones.This was not cheap , and it was a complete waste of money.