AstroAI S8 Ultra 12V 4000A Lithium Jump Starter Up to All Gas/12L Diesel

【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.