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!

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.

Great purchase! Car was dead (I’m in Phoenix, AZ, and the 115 degree heat drains the life out of batteries in the summer), and this little charger immediately jumped the battery! No need for a buddy to come over to hook his car up to mine or to call AAA. Wish I’d purchased this years ago. Great purchase!

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.

Initial Thought: Amazing! I just got this S8 1500 had a great deal for Black Friday. I was looking at some other brands that seemed more expensive and heard that they were more reliable, but I figured I’d roll the dice since this was less than half the price of those other ones and seemed like a great deal with plenty of the safety features at the more high-end jumpers offer. I just got it in the mail the other day and had it charging last night. I have a fairly small Hyundai ELANTRA and have had friends where their batteries have died as well and it’s always caused an issue to go get the new one and install it, etc. or having to tow it if it’s in a really awkward spot. I wanted to completely avoid this and was satisfied with my purchase, but hadn’t gotten a chance to use it yet. Ironically, the night after I had it charged all the way up I threw it in the trunk of my car and when I went to the gas station later that day, I saw a big jacked up truck that’s battery had died (not sure the engine or if it was diesel or not though sorry). I saw these two guys trying to jump the big truck with a smaller car, and they had also already tried using a portable jump, starter, similar to this one with no success. I figured it would be a great time to try this out and try to help them, so I plugged it up and it was very simple to flip onto the battery. I noticed sparks on the Red side of the cable so I knew that it was connected and live so I had the guy try to start the truck, but still no luck. Before giving up though, I pressed the “boost” button with the green light next to it and BAM! The big truck started up right away and turned over normal! I’m really impressed with this little thing and especially the boost feature. Since I got to use it the first day that I had it charged and literally watched another car and another small portable jump starter both fail before using this one with success. Absolutely worth the price! I’m sure that it will easily start up my car and my girlfriend SUV.

These are so great to have! I keep buying for the various friends and family members who hear each other's stories of not having to call anyone for a jump. I've given as a gift - and sometimes people are like, "Oh, thanks..." [sarcastically]. But then some months or years later, they call me and rave, "My car battery died and I had that thing you gave me. I'm so impressed!" And then inevitably, someone else will soon text me asking, "What's that thing that so and so used? Can you order me one?" Also great value for the price.

Got it for my car and ended up buying a second one for my dad. This item is really handy but it works everytime I need it. My battery was dead and while waiting for replacement, 3 days in a row, I use it multiple times to jump my car battery. I worked perfectly. Highly recommended. I was skeptical reading other review but trust me, this small car jump is really powerful and trust worthy.

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.

Really simple to follow don’t need instructions it’s very obvious and simple to use and works great. Saved me a garage call out so I’m in profit already.