









🚗 Never get stranded again—power, safety, and style in your pocket!
The AstroAI B8 is a compact, high-capacity 12V jump starter delivering 3000 amps peak current, capable of jumpstarting large gasoline and diesel engines. Featuring a robust 8000mAh lithium-polymer battery, it recharges fully in just 3 hours. Designed for professionals and adventurers alike, it includes 10 advanced safety protections and a versatile 3-mode LED flashlight, doubling as a power bank for your devices. Lightweight and portable, it’s the ultimate emergency companion for modern drivers.












| ASIN | B0DK3PKCM7 |
| Amperage | 3000 A |
| Automotive Fit Type | Universal Fit |
| Battery Capacity | 12000 milliamp_hours |
| Battery Cell Composition | Lithium Ion |
| Battery Type | Lithium Ion |
| Best Sellers Rank | #532,036 in Automotive ( See Top 100 in Automotive ) #793 in Jump Starters |
| Brand | AstroAI |
| Brand Name | AstroAI |
| Compatible with Vehicle Type | Passenger Car, Motorcycle, SUV, Tractor |
| Customer Reviews | 4.7 out of 5 stars 285 Reviews |
| Item Dimensions D x W x H | 7.33"D x 3.74"W x 1.74"H |
| Item Type Name | jump starter |
| Item Weight | 1.4 pounds |
| Manufacturer | AstroAI |
| Manufacturer Part Number | S8 Pro |
| Manufacturer Warranty Description | 2 Year Manufacturer |
| Model Number | S8 Pro |
| Number of Items | 1 |
| Peak Output Current | 3000 A |
| Product Dimensions | 7.33"D x 3.74"W x 1.74"H |
| Vehicle Service Type | Passenger Car, Motorcycle, SUV, Tractor |
| Voltage | 12 volts |
D**D
Good!
Works as advertised. I've jumpstarted my small car twice, and my uncle's medium size truck. Functions as a flash light and can charge your devices, but slowly, but it's not designed to charge your devices repaidly. More for emergencies.
C**D
It’s started our Corolla…twice in a few hour period.
So far this works great! It’s started our Corolla twice after this latest winter storm. Instructions are easy to follow and super easy to use. It comes half charged; per instructions charge it to 100% before using. Very sturdy and has all the features we’d want for a compact jump starter. Our car had been sitting in the driveway with outside during the winter storm. First use it took a few times to get the car going but it worked. Drove it 20 minutes to church where it sat for a few more hours. Car wouldn’t start again but this junk starter did the trick. Next day the car started pretty close to normal. All in all I’d say this gets the job done.
B**T
Jumped a car with a completely dead battery
I jumped my neighbors car that had a completely dead battery with this. Had to use the boost feature, but it worked great. Started immediately. I am not very keen on using my car to jump other cars, but with this I don't mind. This is also great if the car is not easy to reach with regular jumper cables.
P**H
Life Saver
This thing works so well. I left mine in my trunk for months and used it without failure. The charge lasts a long time, and recharges in a reasonable amount of time. It jumps off cars the exact same way jumper cables do. No more asking strangers for a jump!
A**E
Good quality
Did not take long to charge.
C**R
Works as advertised.
It worked. Despite other reviews did not have charging issues despite using it for 10, 12 charges over a period of time. However it's going into a period of storage so will prob fade like most things with time. Remember 90% charge is ideal so top up every year or so depending upon usage.
S**D
Peace of mind for solo & remote travel
Haven’t had to use this yet, but it’s been on my wish list for quite a while so thankful I can travel now without having to worry about a dead battery. If you travel alone or travel remote areas, this is a must
U**D
Works well. Keep it charged and in your car
Jump started a 2007 Honda Odyssey with a completely dead battery and got me home
D**R
Tolle Starthilfe, die ihren Zweck erfüllt
Für normale Fahrzeuge, sehr geeignet, erfüllt seinen Zweck wurde auch schon genutzt. Preis-Leistungs-Verhältnis stimmt und daher eine absolute Kaufempfehlung.
T**I
Solidny sprzęt
Dobry, solidny, nie miałem okazji wypróbować, to w sumie dobrze.
ا**ر
يعتبر شاحن للموبيل والسيارة في نفس الوقت
كويس
T**S
Very impressed, some of the poor reviews are factually incorrect
Had the chance to test mine out only a couple months after I bought it. A bunch of friends were camping and with 2 early-ish (15-20 year old) Diesel Land Cruisers thought it would be a good idea to use the headlights to illuminate the campsite for a few nights in a row bit not driving on the in between days. The 3rd night they all fell asleep so batteries were absolutely flat as a pancake the next morning. I'm the nerd of the group and was already on my way to join them when I got the call - (I was a bit worried as I had to jump-start both of them, as they also had no jumper cables to jump one to the other). I am pretty sure these cars are between 4-5 litre Diesels so below the specs but I know how these things can have exaggerated numbers. Being completely flat batteries I had to press the boost button, which gives stronger current for 30 seconds. I pushed the button and got the first one to crank - it sluggishly turned but didn't start, I then said wait 15 seconds (to give it a chance to juice the battery a bit), and it fired up quickly with no issue. Did the same 15 second wait on the second car, and it fired up first time. Couple of points: - some reviews say that it is only 500 amps after receiving it. The 3000 figure is "peak amps" which they apparently apply for a second or two to get the thing turning but then settle down to 500 amps for the remainder of crank. I have had several jump starters over the years and ALL appear to advertise the peak amps figure. Many aren't honest enough to give the lower "cranking amps" as this one does so everyone is none the wiser. So keep that in mind when looking at the specifications of jump starters. - after jump-starting these two vehicles, only 2 of the 4 LEDs on the unit remained lit, so I wonder if it would have had enough in it to do a 3rd car (I had started a 2.5 litre petrol about a month prior and all 4 were still lit so never thought to recharge it - this worried me also). Keep in mind that these 2 cars are 4-5 litre Diesels (at the very high end of 4WD Diesel towing vehicles in Australia), and also keep in mind that these batteries were absolutely dead flat. I suspect it would have far more jump starts in it if not having to use the "BOOST" button for 2 large Diesels and not having done another jump-start a month earlier, so I am impressed regardless.
S**R
Read the description
This product does exactly what it says it should do start my Volkswagen Passat diesel as if it had a brand new battery the battery is old and I haven't got round to replacing it yet and it takes a good few seconds of turning over to start the car with this starts as if it was new. If you need something to jump a completely dead battery then this product probably isnt for you .read the description properly about how much power you need it to deliver there's a lot of other reviews saying that it doesn't deliver the power that says it does it does just read the description properly that higher power output is only available for a couple of seconds it's a great battery jump pack for a week to low battery it also can charge your phone and has a handy torch also
Trustpilot
2 weeks ago
1 month ago