

🚗⚡ Never get stranded again—power up your ride and your life with AstroAI B8!
The AstroAI B8 is a compact, lightweight 12V car jump starter designed for petrol engines up to 7.0L and diesel up to 5.5L. It operates reliably in extreme temperatures (-20℃ to 50℃) and features 10 built-in safety protections. Beyond jump-starting, it doubles as a portable power bank with USB charging and includes a versatile 3-mode LED flashlight. The kit comes complete with smart clamps, USB-C cable, and a storage bag, making it an essential, easy-to-use emergency tool for modern drivers.









| ASIN | B0FB2L7CCX |
| Batteries | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | 37 in Automotive ( See Top 100 in Automotive ) 1 in Car Battery Jump Starters |
| Brand | AstroAI |
| Bulb type | LED |
| Customer Reviews | 4.6 4.6 out of 5 stars (10,084) |
| Date First Available | 28 May 2025 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Exterior | Machined |
| Item Weight | 329 g |
| Item model number | B8 |
| Lift type | Auto |
| Manufacturer | AstroAI |
| Manufacturer part number | B8 |
| Model | B8 |
| OEM Part Number | B8 |
| Product Dimensions | 2.8 x 8.3 x 16 cm; 329 g |
| Special Features | LED, Rechargeable |
K**R
Great and Useful Gadget
The product was delivered with proper instructions and all the requisite attachments. The pack was also well over half-charged when it was delivered. It is nice and compact in size, so hardly take up any storage room in the car. The instructions were easy to understand, and the charger itself is very easy to assemble and use. It also comes with a handy drawstring storage bag to keep everything together. It is USB charged so I can plug it in to charge in the car or take indoors and charge like my mobile phone - all nice and easy. My car battery was fairly new, but I haven't used the car that much over the festive period and then there was a sudden, nasty drop in temperature so the battery had drained out and the engine wouldn't turn at all. But this charger worked like an absolute dream! I used it after a quick top up of the power pack (just to make sure) and the car turned over immediately - no problem at all. Fantastic! It was quite a relief - brilliant! I live in the middle of the country and my nearest garage is nearly 6 miles off, so professional help is not close by. Having this charger means I'm no longer reliant on jump leads and the kindness of others if this happens again. So all in all, the charger is well worth the price. It's now essential kit in the car - it gives me a lot of peace of mind.
A**D
Recommended buy!
Great device that is well worth the money. So far jumped an Audi a3 2 litre an a 1.4 Hyundai i20 that had flat batteries. It started them straight away without missing a beat and no struggling like you sometimes get with jumper cables on another car. The pack charged quite quick and came in the box with half battery. Box included the jumper cables module, usb charger without plug, and a carry bag. It’s about the size of a portable phone charger a bit larger than an iPhone pro max. It’s light weight and built very well. After starting the 2 cars it’s still at full battery so can see it lasting a while so gives peace of mind if you keep it in the car. Well worth the price and definitely more affordable than the other brands on the market charging double or triple the price. As it’s a power pack looks like you can also charge your phone from it using usb A as an output and also has an inbuilt small light. Highly recommend. I bought based on the other positive reviews and happy with the purchase
M**K
Price and size, excellent product.
I bought one of these a while ago, for my work van as it stood around at times, but never had it with me when I needed to jump start another vehicle, a large battery on a Land Rover, so for quickness I ordered another one, wasn't expecting to much, gave it a full charge, vehicle wouldn't turn over, put the jump pack on, it starts to flash and tick, gave it a few seconds, turned the ignition and it started first time. It's a heavy vehicle, large engine, but these little jump pack managed a good few times until I managed to change the battery. It's got a bright light, it's a USB charger as well, an excellent little bit of kit, I've got 2, and would recommend it to anyone, for the price, and the size, absolutely fantastic.
P**.
Needs direct connection to battery.
It's good little power pack and started my van straight away but one thing to consider is the connection points. My VW Crafter has the battery stored under the driver's seat and the +&- terminal to jump start are in the engine bay and 0.5m between them. Unfortunately the supplied cables don't reach both but not a major issue as long as you can find a good earth somewhere else.
A**R
Perfect solution
Excellent value for money. Very simple to use, and comes with a very handy bag to keep everything together. My car doesn't like the temperature dropping to low, combined with very short runs. This booster starts the car first time when the battery won't, and takes all worries and hassle away. Power life seems to be excellent as well. Great for charging my phone up as well! 100% recommend.
I**K
Great product at a good price and works perfectly
I purchased this as my previous RAC jump charger battery stopped working. That charger was huge compared to this small compact charger. Quality The build quality of this charger is good with a full charge taking 1-2 hours (mine came with 25% charge out of the box) and it is recommended to charge to 100% when you get it. The charger is built out of strong plastic and overall not particularly heavy and can easily fit into your glove box. WHAT’S INCLUDED? You get the charger a USB charging cable and a crocodile clip accessory that plugs into the charger to allow you to connect it to the car battery HOW DOES IT WORK? After charging the Powerbank for a couple of hours to 100% I connected it to my car allowed it to charge the battery for a couple of seconds and was instantly able to start the car with no problem. This is hugely impressive. The charging cable to connect it to the car battery you simply plug one end into the portable charger and connect the red and black clips to the appropriate terminals on the car battery. The connecting cable even has flashing lights to indicate whether you’ve connected it the right way or not - a bit of a safety mechanism built into the adapter. OVERALL I’ve been left hugely impressed by this compact current battery charger. It has the ability to also charge your device as such as his phone iPad, et cetera as well as being able to charge/boost your car battery. I would highly recommend this product.
L**S
Die AstroAI B8 Starthilfe-Powerbank hat mich schon mehrfach vor größeren Problemen bewahrt. Sie ist kompakt und leicht zu verstauen, gleichzeitig aber leistungsstark genug, um auch größere Motoren (bis 7,0 L Benzin / 5,5 L Diesel) zuverlässig zu starten. Besonders praktisch finde ich die integrierten USB-Ausgänge – so kann man unterwegs auch das Handy oder andere Geräte laden. Das LED-Licht ist ein nützliches Extra, gerade bei Dunkelheit oder wenn man nachts liegen bleibt. Die Bedienung ist einfach und sicher, die Kabel wirken stabil und hochwertig. Nach mehreren Einsätzen funktioniert das Gerät immer noch einwandfrei. Ein kleiner Hinweis: Man sollte die Powerbank regelmäßig nachladen, damit sie im Ernstfall einsatzbereit ist. Fazit: Ein handlicher, zuverlässiger Starthilfe-Booster, der im Auto nicht fehlen sollte. Klare Empfehlung für alle, die auf Nummer sicher gehen wollen. ⭐⭐⭐⭐⭐ (5 von 5 Sternen)
J**N
Very convenient, powerful, holds a charge. I’ve had this for over 3 months now and it’s still at 97% which is pretty good imho. It’s a handy thing to keep in the trunk for an emergency. Not necessarily even for you but a family member or colleague - will make jump starting their car easier than opening your hood, dealing with connecting the two cars, etc.
C**C
Absolutely life saver! Charged it to full and it worked! Got my car up and running! Initially I clasped somewhere wrong and the jump starter went into protection mode, but fixed that up and it worked! I did hope that it would be more specific in the instructions for using it though. It's sufficient but still not as much as my panicking self hoped and needed.
E**.
Acheté pour faire démarrer une batterie sur une 308 Diesel (de 2012), ça fonctionne parfaitement. J'avais une crainte pour pouvoir trouver un endroit pour mettre la masse car le câble est très court et sur ce modèle de 308, la masse de la batterie n'est pas accessible (seulement le plus), mais impeccable, j'ai pu trouver vers le capot de quoi mettre la pince noire sur la carrosserie pour faire masse. Et démarrage du premier coup 👍
N**O
Excelente producto, me llegó el día de ayer... lo primero que hice fue cargarlo al 100% y lo use para arrancar una camioneta (Jeep Grand Cherokee) y realmente no tomo ni un minuto conectado para que arrancara la camioneta, solo lo he usado una vez pero de entrada me parece excelente producto.
Trustpilot
2 weeks ago
5 days ago