GOOLOO GT4000S Jump Starter 4000A - Fast 100W Charging

In this review of the GOOLOO GT4000S jump starter, the bottom line is simple: this compact unit is for drivers who want a reliable, high-capacity portable starter and a fast-charging power bank in one. The standout reason to buy is the combination of a true 4000A peak cranking capability and a 100W fast-charge ecosystem that can fully recharge the unit in about 1.2 hours and even give a five-minute top-up sufficient to start a car. For anyone who needs frequent jumpstarts or wants laptop-level Type-C power on the road, the GT4000S delivers practical power without bulky gear.

Key Features

• 100W Fast Charging: The included 100W car charger can refill the jump starter from 0% to 100% in roughly 1.2 hours so the unit spends less time offline.
• High Cranking Power: 4000A peak output is sized to start most 12V vehicles, including engines up to 12.0L gasoline or 10.0L diesel, making it useful for trucks and boats.
• Multiport Battery Bank: Three USB ports plus a Type-C port provide up to 100W to charge laptops and mobile devices at near-original adapter speeds.
• Informative LED Screen: The 3.2-in LED display shows status clearly so users know when to attempt a jump and can monitor remaining charge.
• Built-In Protections: Ten protection technologies reduce risk of sparks or misoperation, improving safety during jumpstarts.
• Accessory Ready: A 15V/10A DC output and a 400-lumen flashlight with SOS, spotlight and strobe modes make the unit more versatile for roadside use.

Who It's For

The GOOLOO GT4000S is aimed at drivers of larger vehicles and owners of trucks, RVs, boats or diesel pickups who need a powerful portable starter and fast recharge times. It also suits field technicians and travelers who appreciate a 100W Type-C port that can power a laptop and other devices without carrying a separate adapter.

It may be less compelling for occasional city drivers who rarely face dead batteries and prefer an ultra-low-cost emergency kit; those buyers might choose a simpler, lower-capacity pack that fits a tighter budget.

Pros & Cons

Pros

• High 4000A peak current can start large gasoline and diesel engines quickly.
• 100W charging and Type-C output let the unit double as a fast power bank for laptops.
• Long standby life and multiple safety protections reduce maintenance and risk.

Cons

• Some customers report mixed experiences with charge speed depending on charger used, so real-world recharge time can vary.

Specifications

Our Verdict

The GOOLOO GT4000S is a strong choice for drivers who need dependable jump-start power combined with laptop-capable fast charging and a compact footprint. Its fast 100W recharge, clear LED status display and broad compatibility with larger engines make it good value for frequent road users and tradespeople, though occasional drivers seeking the cheapest emergency option may prefer a simpler unit.

Frequently Asked Questions

How quickly will this jump starter recharge?
The included 100W car charger can bring the unit from 0% to 100% in about 1.2 hours; charge times may vary with other chargers.

Can it charge a laptop?
Yes, the Type-C port supports up to 100W output suitable for MacBook and many other laptops.

How many jumpstarts per full charge?
A single full charge can provide around 60 jumpstarts under typical conditions.