GOOLOO GP4000 4000A 12V Portable Jump Starter — 10.0L Engine Rated, Power Bank & Fast USB-C Charging

The GOOLOO GP4000 is a compact 4000-amp 12V portable jump starter designed to quickly restart gasoline and diesel engines up to 10.0L and also serve as a high-capacity power bank for everyday devices.

Built for drivers, outdoor enthusiasts, and tradespeople, the GP4000 combines high cranking power with multi-port charging, reinforced clamps, and temperature-resistant electronics. It’s engineered to handle routine roadside emergencies while doubling as a convenient charger for phones, tablets, cameras, and other small electronics. Rugged housing, built-in safety protections, and an integrated flashlight make it practical for night or cold-weather use.

How powerful is the GP4000 for starting vehicles?

The GP4000 delivers a 4000-amp boost and is optimized to restart most 12V gasoline and diesel engines up to 10.0L. With its JUMPCORE technology, it can deliver the force needed even when battery voltage is very low.

• 4000A peak cranking capability for fast starts
• Compatible with cars, trucks, motorcycles, ATVs, RVs, yachts, and tractors
• Capable of over 60 jump starts on a full charge (typical use)
• Press the BOOST button to engage higher restart current when needed

What charging and power features does it offer?

Beyond jump-starting, the GP4000 functions as a portable charger with multiple output options so you can recharge devices or top off the unit itself. It includes fast USB output and a USB-C charging port for faster, more flexible charging.

• Dual USB outputs: one supports fast charging, plus a USB-C input/output (5V/3A)
• Can charge phones, tablets, cameras, GPS units, and other USB-powered devices
• Large internal capacity for repeated vehicle starts or multiple device charges
• Compact form designed for in-car storage and portability

Is the GP4000 safe and durable to use in emergencies?

Safety is a priority: the GP4000 includes SUPERSAFE protection features and sturdy all-metal clamps to reduce the risk of sparks and misuse. Its shell and rubberized corners help protect the unit from drops while the smart electronics guard against overcurrent and short circuits.

• 10 built-in protections covering reverse polarity, short-circuit, over-voltage, and more
• Durable all-metal clamps to resist wear from repeated use
• Rugged hardened plastic body with rubber corner bumpers for impact resistance
• Integrated flashlight to assist with nighttime or low-light jump starts

How does it perform in extreme weather and what’s included?

The GP4000 is engineered to operate across a wide temperature range, enabling reliable starts from cold winters to hot summers. The package includes essential accessories so you’re ready to use the unit out of the box.

• Operates reliably from -4°F (-20°C) up to 140°F (60°C)
• Includes smart jumper cable, USB-C cable, cigarette lighter adapter, and EVA storage case
• 18 months warranty plus lifetime technical support from GOOLOO
• Tip: recharge the jump starter every 2–3 months if left idle to maintain readiness

Who is this for? The GOOLOO GP4000 suits drivers who want a dependable, portable jump starter that also charges personal electronics. It’s ideal for commuters, contractors, RV and boat owners, and anyone who values quick vehicle recovery and multi-device charging in a compact, durable package.