AstroAI S8 Ultra 4000A Jump Starter, 24000mAh Car Starter(All Gas, Up to 12L Diesel Engine), 12V Auto Battery Booster Pack, Jump Box with USB Quick Charge and DC/Type C Port, LED Light, Jumper Cable

I picked up the AstroAI S8 Ultra 4000A Jump Starter as a backup for my vehicle, and after a few weeks of testing it out, here’s what stood out:Performance:• This thing has serious muscle. I helped a stranded motorist with 5.3L V8 truck battery that was completely dead, and it didn’t hesitate. On paper, it’s rated for all gas engines and up to 12L diesel—and based on the kick it gave my truck, I believe it.• The jumper cables feel sturdy, with good clamping force and no noticeable heat build-up even after multiple test jumps.Design & Build:• Compact enough to store in a glove box or center console. It doesn’t feel cheap like big box stores jump packs, and the rubberized edges give some drop protection.• The LED light is bright enough for roadside use—think emergency hazard light or just finding your way under the hood at night.Battery & Ports:• The 24,000mAh capacity isn’t just for jump starts. I used it to recharge my phone, tablet, and even a laptop via the USB-C port. It supports fast charging, which is a plus if you’re out camping or on the road.• Having a DC output is handy if you need to power 12V accessories.Ease of Use:• Straightforward—plug in the jumper cables, connect, and press. The safety system warns you of incorrect polarity, which is a big deal for people who aren’t mechanically inclined.What I Liked Most:• Strong jump-starting ability (even on bigger engines).• Multi-use battery pack—basically a power bank + jump starter in one.• Solid build, portable size.What Could Be Better:• The carrying bag is functional but hard case would be better• The instruction manual is basic. A more detailed guide or QR link to a video would help first-time users.Add-on to consider for this is a 60w folding solar panel so you will never run out powerTDLR:If you want peace of mind on the road, the AstroAI S8 Ultra is a smart buy. It’s not just a jump starter—it doubles as a reliable travel power bank. For the price, the features and raw power make it an excellent value.

Nice unit, seems to be well built and looks sturdy. By happenstance had to jump start a car and it worked flawlessly. Keeping the unit in my most used vehicle and was glad to be able to lend a jump to help out a stranded traveler.

Works great. My Chevy Tahoe battery was completely dead, like not even any indication on the dashboard of any battery power and this unit started it right up, on the very first try! Just follow the instructions, super easy to use.

It looks good, lightweight but solidly built and took the initial charge quickly. I haven't tried it out yet but will leave a review when I do. Great price!

This is my second one they work great. Now I have one for each of my cars

This seems like a quality product. The carry bag is my only complaint. The gooloo comes with a nice carry case. The included bag is not great.

Shipped quickly. Easy to use. Worked as expected.

This is by far the best jump box I’ve ever owned… most functional and strongest battery life too. I’ll be buying more of these for my kids & grandkids. Thank you for such an amazing product!!!Jumped boat and my Mini Cooper and used 12v cig. Adapter to run air compressor for pool floats and 2 tires… still have 75% life!