GOOLOO 4000 Amp Jump Starter GT4000S - Compact 100W Fast Charger

In this review of the GOOLOO GT4000S jump starter the bottom line is simple: it is aimed at drivers who want a compact, high-output emergency starter that also doubles as a fast power bank. The most convincing reason to buy is the combination of a 4000A peak cranking boost and the unique 100W fast-charging capability that refills the unit from 0% to 100% in about 1.2 hours, making it practical for frequent use and road trips. For anyone who values quick recharge, multi-function utility and clear status feedback, this unit stands out.

Key Features

• 4000A Peak Cranking: Delivers the power to start most 12V vehicle engines up to 12.0L gasoline or 10.0L diesel in a few seconds, reducing the need for roadside help.
• 100W Fast Charging: Includes a 100W car charger that restores the jump starter from zero to full in about 1.2 hours and can provide a five-minute boost to start a car.
• Multiport Power Bank: Three USB ports and a Type-C 100W output let users charge laptops and phones as fast as their original adapters.
• Informative LED Screen: A 3.2-in LED display clearly shows battery status and helps the user know when it is safe to attempt a jump-start.
• Built-in Safety Protections: Ten protection technologies minimize the risk of misoperation, sparks, and battery damage during jump-starts.
• Accessory Ready: Comes with heavy duty jumper cables, a 15V/10A DC output for inflators and other devices, and a bright 400-lumen flashlight for roadside use.

Who It's For

The GT4000S is for drivers who want a reliable, portable solution to dead batteries and need rapid recharge between uses. It fits well in trunks or larger glove boxes and appeals to those who also want a powerful power bank to charge laptops and phones on the go.

It is less appropriate for users who rarely drive long distances and prefer the lowest-cost basic booster, or for professional heavy-duty commercial fleets that require industrial-grade jump systems with higher continuous-duty ratings.

Pros & Cons

Pros

• Very fast recharge with the included 100W car charger, making repeated use practical.
• High starting power in a compact package, capable of handling large gasoline and diesel engines.
• Versatile outputs including Type-C 100W and a 15V/10A port so it doubles as a laptop-capable power bank.
• Clear 3.2-in LED screen and multiple protections improve ease of use and safety.

Cons

• Some users report mixed opinions on build feel and long term battery longevity compared with heavy-duty industrial units.
• It is a premium multi-function unit, so cost and complexity may exceed what a casual driver needs.

Specifications

Our Verdict

The GOOLOO GT4000S is a strong choice for drivers who want a compact but powerful jump starter that recharges quickly and doubles as a true 100W power bank. Its combination of fast recharge, multiple outputs and safety features makes it good value for anyone who regularly travels or needs reliable emergency starting power, though buyers seeking a simple low-cost booster or an industrial worksite unit should look elsewhere.

Frequently Asked Questions

How quickly will this unit recharge?
The included 100W car charger charges the unit from 0% to 100% in about 1.2 hours.

How many times can it jump-start a car on a full charge?
A single full charge can provide up to about 60 jump-starts depending on conditions and engine size.

Can it charge a laptop?
Yes, the Type-C 100W output can charge compatible laptops at speeds comparable to their original adapter.