AstroAI S8 Ultra Jump Starter Battery Pack, 4000A Car Battery Jump Starter with Wall Charger for Up to 10.0L Gas & 8.0L Diesel Engines, 12V Portable Jump Box with 3 Modes Flashlight and Jumper Cable 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. 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.