AstroAIS8 Ultra Battery Jumper Starter Portable, 4000A Car Jump Starter for Up to 10.0L Gas & 8.0L Diesel Engines, 88.8Wh Portable 12V Jump Box with USB Quick Charge and DC/Type C Port

Car died after sitting a few days, quickly ordered this so I could start it and take it to the shop. Quick read the instructions and on the first try it powers the car and worked like a charm. Highly recommend.

Easily charges and works great. I highly recommend one

So surprised that it worked when my other charger wouldn't.SO as a result I bought another for my Jeep.nice compact size and easy to use

This was given a four stars because I have NOT used it to jump start a car at the time I wrote the review.Out of the this unit seemed well made, as well made as other similar items I have bought. So far I have not had to use it to start a vehicle, but have used for a short time, to see if it worked, on a rechargeable desk light and a small fan. Both have a USB-C plug. When I need to jump start a vehicle I will update this review.

Great 60 sale price for this size. Specs say 6 Ah @ 14.8V (88Wh) which is comparable to a large 20V drill battery. The temperature spec say operating 4-122F and charging 32-131F. It should be taken out of the car in below 0 weather or risk damage. It also says not to use it below 3 bars or 75%.The output spec is 900A for 1 sec or 500A for 3 sec even tho it's obvious that the little connectors and wires would melt at much lower current. It's not a welder folks and will never go above 50A instantaneous. It's the capacity in Watt-hours that matters.It is hefty compared to my old 33Wh one that started to bulge and didn't hold a charge like it used to. The storage bag seems fine and it did come with a USB-C charger and 12V socket that should work with a small tire pump, radio or LED strip light.Update -I have now used both the 12V adapter with a tire pump and used the jumper. Added about 5 PSI to all four 235/60R18 tires and had to jump twice to get it running. Decided to recharge it after that. Glad I had it.I've used the USB-A 5V/12V PD port to charge a laptop. It's a great feature to have.

The first was a little skeptic of how small it is, but it worked and has kept working very pleased

My husband's car had a flat 12v battery yesterday morning and I ordered this device from Amazon around 11am. By 7pm it had arrived and we used it this morning to bump start the car - super easy to use, good small instruction manual.When it first arrived I made sure to charge it up to 100% (it came 75% charged which would have been just fine but I wanted to be on the safe side.)It took literaly 30 seconds to check the battery, which was low, and to press the "boost" button. This started the car straightaway and enabled him to take our son to school. This is such a useful tool because you never know when you will need it and there may not be another car around to assist with a charge.We will see how the battery is this afternoon while I work out buying a replacement 12v battery!

So, the battery in my F150 was dying, would not hold a charge. Got stranded a few times and this thing bailed me out. Jump started the pickup 5 times without recharging. I was amazed.