GOOLOO GT4000S 12V 4000A Peak Jump Starter — 100W Two‑Way Fast Charge, Compact Portable Power

The GOOLOO GT4000S is a compact 12V portable jump starter delivering 4000A peak power and a unique 100W two-way fast-charging system for rapid recharges and laptop-level output.

This all-in-one emergency power unit is designed for drivers who want a reliable, high-capacity backup without the bulk of traditional jumper packs. Built with GOOLOO’s JUMPCORE and TOOLCORE technologies, the GT4000S combines high starting current, fast recharge capability, multiple charging outputs, and safety protections in a portable package that fits in a trunk or garage shelf.

How quickly can I recharge the GT4000S and get back on the road?

The built-in 100W two-way fast charging lets the GT4000S go from empty to full in about 1.2 hours using the included 100W car charger. A short 5-minute top-up is often enough to provide a jump-start when time matters.

• Full recharge: ≈1.2 hours with included 100W charger
• Quick boost: ~5 minutes to enable a jump-start
• Type-C input supports other PD fast chargers for flexible charging
• Long shelf life: holds charge for up to 24 months standby with occasional maintenance

What kinds of vehicles can the 4000A peak output start?

With 4000A peak power, the GT4000S tackles most 12V engines quickly and reliably. It covers a broad range of petrol and diesel vehicles, from motorcycles to large trucks and marine craft.

• Gasoline engines up to 12.0L
• Diesel engines up to 10.0L
• Compatible with cars, SUVs, pickups, RVs, tractors, boats, and motorcycles
• Up to 60 jump-starts per full charge under typical conditions

Is the GT4000S safe and easy to operate for non-experts?

GOOLOO integrates SUPERSAFE protections and an easy-to-read 3.2-inch LED screen to reduce guesswork and risk during jump-starts. Multiple safety circuits protect against common hazards while informative indicators guide you through the process.

• 10 protection technologies guard against reverse polarity, short circuits, overcurrent and more
• Large LED screen displays status and prompts for intuitive operation
• Heavy-duty jumper cables included for reliable connection
• Clear charging and temperature operating ranges recommended for longevity

What other tools and outputs does the GT4000S include for roadside use?

This unit doubles as a multi-purpose power station with ports and lighting useful during emergencies or outdoor tasks. It supports small DC devices and common USB-powered gear so you can run inflators, charge laptops, or keep phones alive.

• Type-C PD output up to 100W — suitable for laptops and fast-charging phones
• Three USB ports for phones, tablets, and accessories
• 15V/10A DC output to run tire inflators and compatible 12V/15V devices
• Built-in 400-lumen LED flashlight with spotlight, SOS and strobe modes

Who this is for: The GOOLOO GT4000S is aimed at drivers, fleet operators, RV and boat owners, and outdoor enthusiasts who want a compact but powerful jump starter that also functions as a fast-charging power bank and roadside tool. If you need quick recharge times, broad vehicle compatibility, and integrated safety features in a portable form, the GT4000S is engineered to cover those needs without the weight and complexity of bulky starter kits.

Included in the box: GT4000S jump starter, heavy-duty jumper cables, 100W car charger, USB-A to Type-C cable, Type-C to Type-C cable, cigarette lighter adapter, storage bag, and user manual.