Gooloo GT4000S – Compact 12V Jump-Starter with USB Charging
The Gooloo GT4000S is a portable auto battery charger and jump-starter powered by a built-in lithium battery. It delivers 800A peak current to start vehicles with depleted or frozen batteries and doubles as a USB power bank for charging smartphones and tablets on the go.
800A peak start current reliably starts cars, SUVs, and light trucks in cold or emergency conditions
Dual USB ports (USB Type A and USB Type C) charge devices while the starter battery recharges
Integrated LED flashlight with SOS signal mode for roadside visibility and emergency signaling
Compact, lightweight design at 1.8 kg fits in a glove box or trunk without taking up space
What sets the GT4000S apart
Unlike bulky traditional jump packs, the GT4000S combines a high-current starter with a practical USB charging hub in a single handheld unit. The lithium battery maintains charge for months, so it is always ready when needed.
Ideal for...
Drivers who need a reliable, portable starting solution for passenger vehicles and light commercial fleets. Particularly suited for seasonal vehicles, classic cars, and vehicles stored for extended periods where battery drain is a recurring risk.
Application of Gooloo GT4000S
Connect the red clamp to the positive battery terminal and the black clamp to the negative terminal or a grounded metal surface
Select the 12V mode and press the start button — the 800A pulse initiates cranking within seconds
After a successful start, disconnect the clamps and use the USB ports to recharge phones, tablets, or the starter unit itself
Store the unit in a cool, dry place and recharge every 3–6 months to maintain battery health
Gooloo is a Swiss-market brand specializing in portable power and jump-start solutions for automotive and outdoor applications. The GT4000S sits in the entry-to-mid-tier segment of their starter battery lineup, offering 800A peak current in a sub-2 kg form factor with dual USB charging. Brand information is derived from the product feed and publicly available marketing materials; no independent brand verification has been performed.
The 800A peak current is sufficient for gasoline engines up to approximately 6.5L displacement and diesel engines up to approximately 3.0L. It is designed for passenger cars, SUVs, and light commercial vehicles.
Yes. The GT4000S has both a USB Type A and a USB Type C port. Once the vehicle is running, you can connect your device to either port for charging.
The lithium battery retains charge for several months. For optimal performance, recharge the unit fully every 3 to 6 months if it is not used regularly.
The GT4000S unit, a set of battery clamps (red and black), a USB charging cable, and a carrying pouch.
24 months manufacturer warranty provides coverage against material and manufacturing defects.
Subscribe to the newsletter
New arrivals, promotions and exclusive offers — straight to your inbox.
Please complete your information below to login.
Sign In
Create New Account