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AstroAI S8 Ultra 4000A Car Jump Starter - IP65 Waterproof

Name: AstroAI S8 Ultra 4000A Car Jump Starter - IP65 Waterproof
Brand: AstroAI
SKU: B0CB3W9FRD
Price: 65.99 USD
Availability: InStock

Posted May 28, 2026Updated Jun 9, 2026

$65.99$109.99

40% OFFYou save $44.00

Get This Deal at Woot

In Stock

Is this a good deal?

ULTRA POWERFUL JUMP STARTING: The S8 Ultra jump starter delivers a powerful 4000A peak current and 45C discharge rate. This superior power reliably jump-starts all gas and up to 12L diesel engines, even when the battery is 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: Featuring multiple ports, this jump starter doubles as a powerful portable charger for your devices. Keep your phones, tablets, and drones powered on the road with the S8 Ultra. (Wall charger not included.)
CAREFULLY-CRAFTED DESIGNS: This jump starter is precision-engineered to make vehicle recovery both safe and efficient. Its intuitive battery indicators simplify operation, while high-grade internal components guarantee powerful, reliable performance every time.
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.

Good Deal

40% off: $65.99 (was $109.99). 4000A peak current jumps all gas and 12L diesel engines. Also works as a portable charger with flashlight.

What we like

4000A peak for large engines
IP65 waterproof and dustproof
10 safety protections
Doubles as power bank

Watch out for

Wall charger not included
Bulky for glovebox storage

Tip: Use the boost button for batteries under 9V for fastest jump.

Our Take

Best for: Owners of large trucks or diesel vehicles who want a reliable jump starter.

The AstroAI S8 Ultra delivers a solid 4000A peak current, enough to jump-start big gas engines and 12L diesels with ease. It includes smart cables with indicators and a boost button for fully drained batteries. The IP65 rating means it can handle rain and dust on the roadside. It also serves as a power bank for phones and tablets. The main downside is that it doesn't come with a wall charger, so you'll need a USB-C charger separately. 99, it's a reliable emergency tool for drivers who want extra peace of mind.

Price Analysis

At 40% off the $109.99 list price, this is a solid discount. The $65.99 price is competitive for a 4000A unit with IP65 protection. It's a good time to buy if you need a powerful jump starter.