⚡ Never get stranded—power up like a pro with AstroAI S8 Ultra!
The AstroAI S8 Ultra is a compact yet ultra-powerful 4000A car jump starter with a massive 24000mAh battery, capable of jumpstarting large gas and diesel engines. Featuring smart auto voltage detection, 10 advanced safety protections, and IP65-rated ruggedness, it doubles as a versatile power bank with multiple charging ports and an integrated flashlight—your ultimate roadside emergency companion.
| Brand | AstroAI |
| Product Dimensions | 5.24"D x 10.31"W x 4.29"H |
| Item Weight | 2.13 Pounds |
| Amperage | 4000 Amps |
| Peak Output Current | 4000 Amps |
| Specification Met | IP65 |
| Manufacturer | AstroAI |
| OEM Part Number | S8 Ultra |
| Item Weight | 2.13 pounds |
| Item model number | S8 Ultra |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Manufacturer Part Number | S8 Ultra |
A**X
The ultimate "I don't need a man" starter pack
VERY user-friendly, a dumb blonde can look like a pro under the hood with this thing. It literally tells you if you are not hooked up correctly, and when you are, you get the green light to start your car. I feel this makes the product safe to use. It works for a V6-V8 engine; it says it works on a diesel, but I don't have one of those, so it's up to you guys to let us know. It looks heavy-duty and feels expensive. It also has a long-lasting battery life even after jump-starting a dead battery. I highly recommend this product. The only negative thing I can say about this product is that it didn't have a good storage case; it came with a sack, not the greatest.
W**
A must buy
Outstanding jump pack. Well worth the money. Cranks my high compression diesel over with ease. Long battery life so you don't need to charge often
G**I
Works great and stays charged
Battery life is great even if using multiple times and several devices. It didn’t take as long as I expected to charge either which is nice.
J**.
Seemed rugged enough to keep in the trunk of a car.
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.
S**R
Excellent Product
Excellent. Really amazing. Had a completely dead battery on my Audi TT and this charger in boost mode started the car up straight away. Months later and the charger is still holding a charge. Very good item. Highly recommend. Thanks
F**H
Good value
Works great. Good value for the money. Used 2x already without recharging
B**N
Works amazingly
I had an issue with another charger that I had gotten from this company. They reached out very quickly and resolved the issue within a couple days
R**.
It’s better than described
This thing is sweet. Very easy to use and very powerful
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