AstroAI S8 Car Battery Jump Starter 1500A - Portable 12V Lithium Jump Box

I am so obsessed with this little thing! Car was in storage for 3 months and the battery was dead. I got this to try jumping it myself. INSTRUCTIONS: very simple. you attach red clamp, then black, wait for solid green light, press the “boost” button if the light is flashing, then try to start your car. *VERY IMPORTANT* I almost missed this in the instructions - after your car starts you must remove the device within 30 seconds or it can do damage. Also- although it arrived with full bars, I charged it before use as instructed and it continued to charge, stopping when it was actually full. So def recommended charging on arrival. HOW IT WORKED: It took several seconds for the green light to turn on, so be patient. If it doesn’t turn on, try redoing the clamps. Once the light was green I tried to start the car and it didn’t work twice. I almost gave up, but the dash lights came on the second time and the engine made a noise, so I pressed the boost button and tried again - and it started !! I think it only didn’t work at first due to my battery being dead for ages, because it worked immediately on subsequent uses. Yes, subsequent uses. I drove my car around for a couple of hours and everything seemed fine for the next day. Then after not driving it for a day it wouldn’t start again. I had forgotten to charge the device but it instantly worked and was at 50% charge after. I had a (correct) feeling it would keep happening every time I turned my car off but my mechanic was closed for the weekend and I had some errands to run- so I just brought the little guy with me. Since it’s a USB plug I charged it while I was at the gym and it was fully charged by the end of my workout! I then had to use it two more times before going home, at that point it had 75% charge. So you can get 2-3 jumps out of one charge for sure, maybe even 4! Now I thought my battery kept dying because this little guy + driving around wasn’t able to give it enough juice after being stored for ages, so I got a smart battery car charger and charged the car battery for the full 4 hours recommended. After that my car still wouldn’t turn on! Once again the little guy saves my butt - I was immediately able to jump it to take it to my mechanic, who confirmed my battery was absolutely shot from being in storage. Honestly I’m pretty impressed this little thing was able to jump a toasted battery so consistently when a full battery charge via a wall outlet didn’t even work. FINAL THOUGHTS: This thing absolutely rocks. Amazing value for the price. Some people complain about only being able to get a couple uses out of it before having to charge the device- but as mentioned I’m just amazed that this tiny, super light weight thing has so much power ! This thing is lighter than those portable batteries you use for your phone and just bigger than the length of my hand. So easy to toss in a bag and it charges so quickly. One thing I feel a little stupid about, for anyone else who is too used to charging their iPhone with a usb-C wall mount: the charger is USB A to USB C. At first I only saw the USB A port, so I plugged that bit into the device and the USB C end into my phone’s wall mount. I then saw the little USB C port in the side which labeled “in” and realized I had plugged it in backwards. So just make sure you don’t make that ditzy mistake or else I don’t think it would actually charge. The USB A ports are labeled “out” so I think it could double as a power bank for your phone or whatever which is cool!

I bought this for my daughter for her old Hyundai that was a 2008. She was very appreciative when she started having battery issues and it bought her time to get a new battery that was no longer holding a charge. When you are stranded due to battery issues, these are really worth it. The size is great. Does not take up much room at all. It's a good compact size. It's a very good design that is easy to use and not hard to figure out. It was powerful enough to start a weak battery so it would buy her time to get a new battery and not leave her stranded. Plus it is SO MUCH EASIER than the traditional cables. I still keep the traditional cables and a unit like this, especially in winter. It is so much easier to help someone start their car than dragging out the cables and parking next to them, etc. The connectivity of this unit makes life so much easier! It is so versatile too. It's so great it has an LED flashlight and other ports for power and charge. Get this for your kids when they cars, no doubt. The peace of mind alone is worth it. You just have to keep it charged which doesn't take long and not that big of deal. Just charge it every few months over night and off you go. I do it in the garage so I see it easily on my way out. If you charge it in your house, I would recommend putting your car keys next to it so you can't leave without it. This unit also feels so solid. It has a rugged shell that feels durable. Love it!

When I took the AstroAI S8 out of the packaging, I looked at the unit and said to myself "you're kidding me this will never work but whatev's I'll give it a try". Boy was I wrong, this jump starter nails it every time. Early am, I took my dogs to the beach, returned, opened the lift gate, the pups jumped in and that was it, out of nowhere the battery died.....literally nothing was working. Got a jump and was back on the road. Back home, left it over night same thing. Luckily, I thought this would be a good time to buy a jump starter, cause you never know. I'd been toying with it for a while and already have a tire inflator/pressure monitor as a 'just in case'. Honestly, I didn't expect this to happen again but it did. My car is only a few years old, it's a BMW X5 4.0i. The jump charger not only needs to be able to crank & spark the engine but power-up all the monitors/heads-up display/driving/safety/management/seat passenger detectors/climate/level & motion sensors and way more stuff/systems in tandem with cranking the engine. By-Jove....it can do all of it, the car starts without any hesitation. Unfortunately, from a dead battery, the default is for all the electronics to fire up at once, so there's no 'lite start' option. I was really surprised. Useability is a sinch. Plug-in the jumper cables to the AstroAI S8 unit, pop the hood, connect the cables to the vehicle contacts (a tiny green LED by the Boost button start flashing), press the 'Boost' button at the base of the cables, get behind the wheel and start the car. I couldn't tell the difference between the jump start and regular start. It can even start the car with less than 75% charge. I can expect at least 4-5 starts from the device. It charges from a standard USB port (USB A) and when it's fully topped-up it stops charging. I'm not sure if this makes a difference but I should point-out the car was jumped from designated contact points, not the battery. Also, as soon as I press the 'boost' button I can hear the car come to life and go through some sort of boot-up. By the time I get behind the wheel, my key is detected, everything is as normal and start the vehicle. There was an instance whereby the alarm went off, I just hit 'unlock' on the fob and that did the trick. On the downside, the jumper cables seem a little short (I had no problem reaching my car's contact points) and you will have no problems jumping the battery directly. Although, I've see in some vehicles the contact points are more than 18in apart, this will require some sort of extension. As a blanket synopsis: The AstroAI S8 works great, it easily starts a super systems-power hungry vehicle w. a 3.0 inline 6.

Very happy with this jump starter. I bought it just in case and it already got me out of a jam when my car battery died. It started the car on the first try, no problem. It's compact and fits perfectly in the glove box. The charge holds up well, and it doubles as a power bank for my phone, which is a nice bonus. The built-in flashlight is handy for emergencies and the clamps feel sturdy and well made. For the price, it's absolutely worth having in the car for peace of mind. Highly recommend.

This little box is a game changer. It has literally save the day more than once. The only draw back is getting it hooked up, pushing the boost button and Getting in your car and pushing start. If your not fast enough the booster will be drained.

This is a game changer I have used this to start my car and help others so quick and easy holds a charge for a very long time I just bought my son the same one for his car

I love this item. It got my old battery through subfreezing temps until I could afford to replace it and is easy to use! I highly, highly recommend. I have a small SUV and it worked perfectly with it.

Works like a charm. It's gotten me out of a jam several times. It's easy to use, light weight, has a carrying case... I love it!!

Dice que arranca todos los autos a gasolina y diésel hasta 3.0.. tengo un auto de gasolina 2.5L y con la batería descargada (9-10 volts) lo encendió sin problema. Lo cargué hasta el 100% antes de usarlo y arrancó mi carro hasta 5 veces hasta llegar al 50%. En 2 arranques llego al 75% pero con otros 3, bajo al 50%, así que le calculo que fácil arranca unas 8-9 veces antes de descargarse. La verdad funcionó muy bien, mejor de lo que esperaba. Eso sí, la descripción dice que venía con cargador pero lo único que incluye es un cable usb tipo C para cargar. No incluye cuadrito. Funciona bien como bataria portátil para cargar celulares pero yo lo use exclusivamente para arrancar el carro. Es una buena compra, lo agarré en especial a 900 pesos aunque considero que hay otros productos que funcionan igual a menor precio pero este tenía buenas reviews. Es una buena opción si es lo que buscas. Además llego rápido, un día antes de lo esperado.

الجهاز ممتاز ماشاءالله واستخدامي له قليل ممكن ١٠ مرات خلال سنة على عدة سيارات صغيرة او كبيرة منها واحدة منتهية بطاريتها لها ٦ شهور وماشاء الله شغلها. الى الان تقريبا سنة مافي اي مشاكل او تسخين. بس انتبه لنقطة انك لازم تفكه من البطارية بعد تشغيل السيارة

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 👍

I bought this AstroAI S8 car battery booster as a gift for my sister, whose car battery tends to go flat because she doesn’t drive often enough. From the moment I opened the box, the quality of the product was immediately apparent. The build quality is evident straight away, instilling confidence that it’s designed to last. The packaging was sleek and stylish, and the unit arrived nearly fully charged, which was a pleasant surprise. Knowing my sister needed something reliable, I was eager to test it before she had to rely on it in an emergency. The jump starter surpassed expectations right from the beginning. We tried it on her car with a flat battery, and it worked flawlessly on the first attempt. Each jump start uses about 25% of the booster’s battery, but keeping an eye on the remaining power is straightforward thanks to the bright blue battery status lights. The unit is also very easy to charge using the included USB cable. Its ease of use is a major highlight. Just connect it according to the clear instructions, and the car started up in seconds. This level of convenience is a significant improvement over traditional jump leads, allowing her to be completely independent and avoid the awkwardness of asking a neighbour or stranger for help to jump-start the car. The clamps and cables are incredibly tough and durable, feeling nice and tight when secured to the battery, unlike the jump leads I’ve used in the past. The compact size of this booster is another strong point. It’s small enough to fit neatly in her older Fiat’s glove compartment without taking up much room, yet it packs a powerful punch. Despite initial doubts about whether such a compact device could handle an older battery, it performed admirably, even in cold weather when batteries are typically more challenging to start. Over the past month, she’s had to use it multiple times, and it has proven to be a dependable tool. The built-in LED torch is another thoughtful feature, making it easier to operate in dimly lit conditions, like early mornings or late evenings. The fact that it also doubles as a power bank for charging mobile phones adds even more value to an already impressive product. Considering its price, the AstroAI S8 offers exceptional value for money. Not only is it affordable, but it also delivers high performance, making it a smart choice for any car owner. Given that a single call-out for roadside assistance can cost twice as much as this booster, investing in one is an obvious decision and well worth every penny. The delivery was fast, and the overall service was excellent, making the entire purchase experience smooth and satisfying. I’m so impressed with its performance and build quality that I’ve decided to order one for my car as well. If you’re in the market for a reliable, powerful, and well-built jump starter, I highly recommend the AstroAI S8. I could kick myself for not buying one sooner. Thank you for taking the time to read my review. I hope that you found it helpful and that it assists you in your decision-making. I try to be as honest and fair as possible, as those have always been the reviews that helped me the most.

I got it to help jumpstart my VW PASSAT V6 as the battery was completely drained while the car was parked for ~ 2 months. The unit was at 50% battery when received. The manual is great, simple and straight forward. I followed the instructions in the manual. It took approx. 1 hour to charge it via my phone's USB-C fast charger up to 100%. It took 2 attempts to start the car. The 2nd attempt was because I didn't wait the 30 seconds as per the manual's instruction in handling completely drained batteries in my 1st attempt. On the 2nd attempt, I followed the instructions for completely drained batteries and the car started smoothly. Both attempts used ~25% of the booster battery capacity. Over all, the package is great in size and weight. I like the idea it came with a small bag to house the booster and cables. The booster uses USB-C for charging. No more jump start cable hassle and no more waiting forever for insurance recovery.