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AstroAI S8 Ultra 12V 4000A Lithium Jump Starter Up to All Gas/12L Diesel
✅ In stock
C
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 21, 2026 3:38 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
🙂 Fair Price- 🙂Verdict: Fair Price. Small discount vs history. Consider waiting for a better drop.
- 💰The current price is 21% below what this product typically costs — a notable saving over its usual going rate.
- 🏷️The retail sticker price has been slashed by 48% — a steep markdown from the official listing.
- 📉Going back roughly eight months, a more competitive price has not appeared — this stands out as a strong value by recent standards.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
23.17/28
Recent Value
2.24/22
Market Standing
17.01/20
Deal Strength
13/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Woot
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓【4000A PEAK POWER & WIDE COMPATIBILITY】The S8 Ultra car jumper delivers 4000A peak current and a 45C discharge rate for fast, reliable jump-starting. If your vehicle won't start due to low battery voltage, simply press BOOST for an emergency jump-start. Compatible with all Gas/12L diesel, plus 12V vehicles such as motorcycles, pickup, RVs, tractors, trucks, vans, ATVs, and more. Built to last 1000+ charge cycles, and engineered to withstand extreme weather from -4°F to 122°F (-20°C to 50°C).
✓【ADVANCED SAFETY & HEAVY-DUTY BUILD】The S8U car battery jumper features smart cables with 10 comprehensive safeties. Patented spark-proof and reverse-polarity protection helps prevent sparks and reverse-polarity hookups during use. Tested to UL (NRTL), FCC, and IEC standards. IP65-rated and rugged protection design. Equipped with a longer, thicker cable (18.5 inches long, 0.24 inches thick) and reinforced precision connector, ensuring a secure connection and stable startup power.
✓【MULTIFUNCTIONAL & RELIABLE】Built-in 300-lumen flashlight with 3 modes: Lighting, Strobe, and SOS — 80-Hour Runtime, ideal for camping, engine checks, and emergency signaling. It also doubles as a portable power bank with 1 USB-C port and 2 USB-A ports to charge phones, tablets, drones, and more. It's a reliable backup for daily driving, road trips, camping, and unexpected battery emergencies. (Note: Wall charger not included)
✓【EASY TO USE & ULTRA PORTABLE】The jump pack automatically analyzes battery voltage and delivers the right power for a boost. Smart jumper clamps with intuitive indicator lights help you quickly identify and resolve issues. The upgraded unit weighs only 1.79 lb and measures 8.94 x 3.82 x 1.42 in, so it fits easily in a bag or anywhere in your car. A storage bag is included to keep accessories organized, prevent loss, and reduce wear.
✓【KEY TIPS & SUPPORT】For best performance, fully charge before first use and recharge at least every 3 months during long storage. Use and store within the recommended temperature range: operating/storage -4°F to 122°F; charging 32°F to 113°F. Avoid prolonged exposure to high heat, moisture, or direct sunlight. We offer a 30-day return window, 24-month warranty, and 24/7 customer support. Contact us anytime—we're here to help.
⚙️ Specifications
Brand
AstroAI
Battery Cell Composition
Lithium Ion
Voltage
12 volts
Product Dimensions
5.24"D x 10.31"W x 4.29"H
Vehicle Service Type
All of the above
Item Weight
2.1 pounds
Amperage
4000 A
Peak Output Current
4000 Amps
Specification Met
IP65
Manufacturer
AstroAI
Item model number
S8 Ultra
