Customers say
Customers find the jump starter useful and compact. They say it works well, charges quickly, and is portable enough to carry anywhere. Many consider it a good value for the cost and appreciate the cost savings of hiring roadside assistance. The build quality, ease of use, and start time are also praised. However, some customers have mixed opinions on the battery life.
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Your Sales Price $139.99 - $85.49
A quick rundown of this product’s key features:
ULTRA POWERFUL JUMP STARTING: The S8 Ultra car jumper starter portable features a powerful 4000 A current and a 24000 mAh battery capacity, along with a 45 C discharge rate. It can boost up to 10 L gas and 8 L diesel engines, even when fully drained.
EASY TO USE: This car jump starter includes smart jumper cables with intuitive indicators, providing a safe and seamless user experience. The car starter automatically analyzes the battery’s voltage to deliver the appropriate boost. For batteries at 9-12 V, it will automatically jumpstart them after the jumper cable is connected. When the batteries are below 9 V, the S8 Ultra will prompt you to press the Boost Button, quickly jump starting fully-drained batteries.
SUPERSAFE 12V JUMP BOX: The S8 Ultra car battery jump starter provides 10 comprehensive safeties, including reverse polarity, overcurrent, reverse connection, overvoltage, overcharge, overdischarge, overload, short circuit, low/high-temperature protection, and spark-resistance. It is also waterproof (IP 65), dust-proof, and drop-proof.
WIDE COMPATIBILITY PORTABLE CHARGER: Equipped with multiple ports (5 V/9 V/12 V output USB-A port, 5 V/2.4 A output USB-A port, Type-C in/out port, 15 V DC port), this jump starter is a versatile power bank that charges various electronic devices and powers DC car accessories. Power anything from car vacuum cleaners to cellphones with the S8 Ultra Jump Starter. Wall charger not included.
CAREFULLY-CRAFTED DESIGNS: The jump starter battery pack was carefully designed to make jump starting vehicles an efficient and safe process. The smart battery indicators ensure ease of use while its high-quality internals ensure powerful performance.
ROADSIDE CAR EMERGENCY KIT: The AstroAI S8 Ultra portable car jump starter can pack a punch, reviving cars in less than a minute, using as a safe and reliable tool to help you take risks. A built-in integrated flashlight can makes nighttime operation easy with its 3 light modes.
Our Top Reviews
Reviewer: DIYer
Rating: 5.0 out of 5 stars
Title: Fantastic- started my F150 even when my other bigger charger failed
Review: So surprised that it worked when my other charger wouldn’t.SO as a result I bought another for my Jeep.nice compact size and easy to use
Reviewer: Zhao Yun
Rating: 5.0 out of 5 stars
Title: Pretty impressive for the cost.
Review: I actually purchased two of these devices because the 1st one I bought was a smaller model for around 20$. They have built in flashlights, charging ports for USB devices, and will provide both power to my motorcycle (which is required to move it at all) if the battery is low/dead. It has strong enough cranking power to start a car, so my motorcycle will easily start with them. The larger modle will likely start a semi-truck, depending on the cranking amp requirements. When on sale, definitely worth every penny. Even if you don’t need to jump your battery off, it’s great for emergencies, and doesn’t put your own battery at risk by using standard jumping cables. Plus, with the capacity, they work great for charging any device.
Reviewer: Sj
Rating: 5.0 out of 5 stars
Title: Wow! What a help!
Review: My husband’s car had a flat 12v battery yesterday morning and I ordered this device from Amazon around 11am. By 7pm it had arrived and we used it this morning to bump start the car – super easy to use, good small instruction manual.When it first arrived I made sure to charge it up to 100% (it came 75% charged which would have been just fine but I wanted to be on the safe side.)It took literaly 30 seconds to check the battery, which was low, and to press the “boost” button. This started the car straightaway and enabled him to take our son to school. This is such a useful tool because you never know when you will need it and there may not be another car around to assist with a charge. We will see how the battery is this afternoon while I work out buying a replacement 12v battery!
Reviewer: Earl Van Sickle
Rating: 4.0 out of 5 stars
Title: Appears to be a to be good quality
Review: Have only had for a month. Appears to be well made and solid. Haven’t had to use it yet and hope I don’t but feel confidante that it will work when needed
Reviewer: GirlRacer
Rating: 5.0 out of 5 stars
Title: Battery Charge
Review: Great product. My car battery died due to cold weather. I did not have to call AAA. I ordered this product and jumped my battery. No experienced needed. You can go to YouTube for a tutorial.
Reviewer: John Giordano
Rating: 5.0 out of 5 stars
Title: Top quality
Review: In Canada, we’ll below zero. Jump started my dead atv effortlessly. Doesn’t lose much charge over time, small, compact, just love this. 5 stars.
Reviewer: Tech007
Rating: 5.0 out of 5 stars
Title: Started my 2015 Hemi
Review: I really wanted to get a jump pack and did not want to brake the bank doing so. I ordered this one hoping I would get a chance to try it out and all I can say is be careful what you wish for. Freezing temperatures hit out city and my battery was dead. Plugged this jump pack up right out of the box and it started my V8 Hemi on the first try. I can’t say anything about longevity but it is working perfectly right now.
Reviewer: Billy Parkinson
Rating: 5.0 out of 5 stars
Title: Good value
Review: It’s great. Just a couple of weeks ago, I had to use it to jump my work van off. Worked great
Reviewer: Sulaiman Ismail
Rating: 5.0 out of 5 stars
Title:
Review: جهاز استرو الترا يبدو أنه مصنوع من مواد من الدرجه الاولى السعة ٣ أضعاف تقريبا من استرو الاقل سعرا متين وضد الصدمات مدخل يو اس بي سي لشحن الجهاز ومخرج لتشغيل السيارة و مخرجين يو اس بي عادية لشحن الموبايل احداها للشحن السريع وكذلك مخرج ١٢ إلى ١٥ فولت لولاعة سجاير او اي جهاز يعمل بطاقة ١٢ فولت ويستحق الشراء ..
Reviewer: From
Rating: 5.0 out of 5 stars
Title:
Review: fácil de operar lo cargas al 100% y listo mi camioneta arranco a la primera después de varios días de estar con la batería totalmente baja
Reviewer: Mark Prinsloo
Rating: 5.0 out of 5 stars
Title:
Review: This is a very powerful charger. The car,which had been standing at the airport long term carpark for 10 weeks,had a completely drained battery. I had numerous people try to assist me with a jump start but the engine wouldnt turn over. With this charger connected,it fired up first time.
Reviewer: omar
Rating: 5.0 out of 5 stars
Title:
Review: شغلت فيه سياره ثلاث مرات ونزل شحنها الى ٧٥٪
Reviewer: MOHAMMED RASHED
Rating: 5.0 out of 5 stars
Title:
Review: بشكل غير مبالغ فيه جهاز اكثر من ممتاز قام بتشغل سيارة متوقفه منذ قرابه شهر او اكثر بقليل لم اكن اتوقع انه سيقوم بهذا المهمة بهذا الشكل الرائع هذا الجهاز من المهم اقتناءه لانه يساندك وقت الطوارئ انصح بشراءه
Price effective as of Mar 19, 2025 07:28:13 UTC
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