Gooloo GT4000S Jump Starter Review: Worth It? (October 2026)
The Gooloo GT4000S is a 12V jump starter with 4,000A peak output and 100W two-way USB-C charging. Its screen, three USB ports, DC output and flashlight suit drivers who want a jump pack that can also power compatible devices.
On this page (7 sections)
- Is the Gooloo GT4000S a good fit for your needs?
- How should you choose between the GT4000S and alternatives?
- Does the GT4000S suit a truck, SUV or RV?
- What does 100W charging add in daily use?
- How do you set up and use the GT4000S?
- How should you store and care for the GT4000S?
- Is the Gooloo GT4000S worth choosing?
The Gooloo GT4000S is a 12V jump starter with 4,000A peak output, 100W two-way charging and a built-in screen. Its combination of jump-starting power, USB-C charging and emergency outputs makes it a match for drivers who expect to use a jump pack for more than one task.
Gooloo states coverage for gasoline engines up to 12.0L and diesel engines up to 10.0L. Those figures are a starting point for checking fit, but your vehicle's manual and the jump starter's instructions should guide the decision.
Is the Gooloo GT4000S a good fit for your needs?
The GT4000S is a strong fit if you want fast charging, a readable status screen and power for compatible roadside devices. It is less compelling if you only need a simple emergency pack for a small car and would not use the laptop, USB or DC outputs.
Gooloo GT4000S: Best for fast charging
- 4,000A peak output
- 100W two-way USB-C charging
- 3.2-inch LED screen
- 400-lumen flashlight
A 12V jump starter with 4,000A peak output, fast USB-C charging and emergency power features. Its screen, flashlight and DC output suit drivers who want more than a jump pack.
Pros
- 100W two-way USB-C charging
- 3.2-inch status screen
- Three USB ports and 15V/10A DC output
- 400-lumen flashlight with three modes
Cons
- About 9.05 x 3.93 x 2.12 in
- Recharge it every 3 months during long-term storage
- Stated engine coverage is not a guarantee for every vehicle
The unit includes heavy-duty jumper cables, a 100W car charger, USB and USB-C cables, a cigarette lighter adapter, a storage bag and a user manual. That set of accessories makes it easier to keep the jump starter and its charging gear together in a vehicle kit.
What makes the Gooloo GT4000S stand out?
The GT4000S combines 4,000A peak output with 100W two-way USB-C charging. The USB-C port can recharge the unit through a compatible fast charger and can also charge compatible laptops at up to 100W.
Gooloo says a full charge can support 60 jump-starts, though the number of starts will depend on the vehicle, battery condition, temperature and how the unit is used. The 3.2-inch screen gives you status information before you begin a jump-start.
The unit also has three USB ports, a 15V/10A DC output and a 400-lumen flashlight with SOS, spotlight and strobe modes. Those features can be useful on a roadside stop, especially if you carry compatible devices or accessories that need power.
Gooloo describes 10 built-in protection features. That can help reduce the chance of a connection mistake, but it does not replace reading the manual and connecting the clamps in the correct order.
Who should skip the GT4000S?
Skip the GT4000S if you want the smallest and simplest pack for occasional use in a compact car. A lower-output model may be easier to justify if you do not need its fast USB-C charging, DC output or multiple USB ports.
Also skip it if your vehicle is not a compatible 12V model or if its requirements fall outside the stated range. Engine size is only one part of the decision; the condition of the battery and the instructions for both the vehicle and the jump starter matter too.
How should you choose between the GT4000S and alternatives?
Choose among these models by matching the feature you will actually use: fast charging, more stated peak output, a BOOST button or compact storage. The top number alone should not decide the purchase.
The GT4000S is the balanced option for drivers who want the combination of 4,000A peak output and 100W two-way charging. It also has the broadest set of power options among the 4,000A models here.
The GT6000 raises stated peak output to 6,000A and capacity to 27,000mAh while retaining 100W charging, a display, three USB ports and a 400-lumen flashlight. It is the more suitable choice if you want the higher stated output and capacity, but it is still a 12V unit, so check your vehicle's requirements.
The GP4000 is the better fit if the BOOST button for very low battery voltage is important to you. It has 4,000A peak output, two USB outputs, USB-C input, all-metal clamps and a carrying case, but does not have the GT4000S's 100W two-way charging; its wall charger is not included.
The NOCO Boost GB50 is a compact alternative for buyers who value storage size and its IP65-rated housing. Its 1,500A peak output and stated engine coverage are lower than the Gooloo models in this guide.
For a closer comparison of the two 4,000A Gooloo models, see our Gooloo GP4000 vs. GT4000S comparison.
You can also browse Gooloo jump starters by model.
For NOCO alternatives, compare NOCO jump starters by model.
Does the GT4000S suit a truck, SUV or RV?
The GT4000S can be a fit for a 12V truck, SUV or RV when the vehicle falls within the unit's stated compatibility and engine limits. Gooloo names pickups, RVs, trucks, boats, motorcycles and tractors among compatible vehicle types.
For a truck or SUV, compare the vehicle's requirements with the jump starter manual before relying on engine displacement alone. If you drive a pickup, our guide to jump starters for pickup trucks covers other options; the heavy-duty jump starter guide is useful for larger vehicles.
The jump-start process still depends on a sound connection and correct steps. Our step-by-step guide to using a car jump starter explains how to prepare the vehicle, connect the clamps and use the pack safely.
What does 100W charging add in daily use?
The GT4000S's 100W USB-C port makes sense if you carry a compatible laptop or want to recharge the jump starter quickly. Gooloo says the included 100W car charger can fully charge the unit from empty in 1.2 hours.
It also says 5 minutes of charging can provide enough power to start a car. Actual results depend on the power source, charge level and vehicle conditions, so do not count on a short charge to solve every starting problem.
The 15V/10A DC output is intended for compatible 12V or 15V devices, including tire inflators and inverters. Check the voltage and power requirements for an accessory before plugging it in.
How do you set up and use the GT4000S?
Before the first trip, fully charge the GT4000S and confirm that the included cables and charger are in the storage bag. Read the manual and learn what the screen shows while the unit is ready, charging and connected.
For a jump-start, park safely, switch off the vehicle and follow the manual's clamp order and status guidance. Attach the clamps firmly to clean battery terminals, keep the cables clear of moving parts, and disconnect them in the sequence the manual gives after the engine starts.
If the first attempt does not work, do not keep repeating the same steps without checking the connections and the device status. Consult the vehicle and jump starter manuals, and stop if you see damaged cables, unusual heat or other signs that something is wrong.
How should you store and care for the GT4000S?
Charge the GT4000S fully before first use, then recharge it at least every 3 months during long-term storage. Gooloo gives an operating and storage temperature range of -4°F to 140°F and a charging range of 14°F to 113°F.
Avoid prolonged exposure to high heat, moisture and direct sunlight. Store the unit and its cables together, and check the cable condition and charge status when you prepare your roadside kit.
Do not charge the unit outside its stated charging range. If the jump starter has been stored in a very cold or hot vehicle, let it return to a suitable temperature before charging, and follow its manual for storage and use.
Is the Gooloo GT4000S worth choosing?
Choose the GT4000S if you want 4,000A peak output plus fast two-way USB-C charging and multiple emergency outputs. Choose the GT6000 for its higher stated peak output, the GP4000 for its BOOST button, or the NOCO GB50 when compact storage is the priority.
If you are unsure whether a jump starter belongs in your car kit, read Are jump starters worth it? for the broader buying decision.
Frequently asked questions
What engines can the Gooloo GT4000S jump-start?
Gooloo states the GT4000S can jump-start 12V vehicles with gasoline engines up to 12.0L and diesel engines up to 10.0L. These are stated limits, not a promise for every vehicle; check your vehicle and jump starter manuals before use.
How fast does the GT4000S recharge?
Gooloo says the GT4000S charges from empty to full in 1.2 hours with the included 100W car charger. Actual time depends on the power source and conditions.
For long-term storage, Gooloo recommends recharging it at least every 3 months.
Can the Gooloo GT4000S charge a laptop?
The GT4000S USB-C port supports up to 100W charging for compatible laptops. Check your laptop's charging needs and cable, since it may not accept the port's full output.
Should you choose the GT4000S or GP4000?
Choose the GT4000S for 100W two-way USB-C charging, a status screen and a 15V/10A DC output. The GP4000 has the same stated 4,000A peak output and a BOOST button for very low battery voltage, but no 100W charging.
