GOOLOO GP4000 4000A Peak Car Jump Starter - Portable 12V Power Pack

In this review the GOOLOO GP4000 is evaluated as a rugged, portable jump starter aimed at drivers who want dependable emergency starting without fuss. The bottom line: this unit stands out for a powerful 4000A boost that can restart gas engines and diesels up to 10.0L, plus a large battery capacity that doubles as a charger for phones and devices. Its sturdy housing, metal clamps and multi-mode LED light make it practical for roadside use, and the built-in protections reduce the risk of sparks or reverse hook-up when jump-starting a dead battery.

Key Features

• 4000A Boost: Delivers strong starting current to restart gasoline engines and diesel engines up to 10.0L quickly, even with very low battery voltage.
• Large Capacity Portable Charger: Acts as a power bank with dual USB outputs and a USB Type-C 5V/3A port so you can charge phones, tablets and other devices while on the go.
• Safety Protections: Built-in smart protections include spark-less operation and reverse polarity protection that help prevent damage during connection errors.
• Durable Construction: Hardened plastic body with rubber corners and solid metal clamps makes the unit resilient to drops and repeated use.
• Multi-mode LED Light: Integrated flashlight offers normal, strobe and SOS modes and can run continuously for extended emergency use at night.
• Wide Temperature Range: Smart circuitry supports reliable starts in extreme cold down to -4F (-20C) and up to 140F (60C).

Who It's For

The GP4000 is best for drivers of cars, pickup trucks, RVs, ATVs and boats who want a high-capacity, easy-to-use jump starter that also charges devices. Owners of diesel trucks up to 10.0L and motorists who travel in cold climates will appreciate the cold-weather starting and the rugged design for roadside emergencies.

People who only need an ultra-compact charger for occasional phone top-ups or those who require integrated wall charging accessories should look elsewhere, since the box does not include a wall charger and the unit is built for higher-capacity vehicle starts rather than being the smallest pocketable power bank.

Pros & Cons

Pros

• Very high 4000A peak boost that restarts large engines quickly.
• Large battery capacity supports more than one emergency start and multiple device charges.
• Comprehensive safety features and durable all-metal clamps reduce risk and wear.
• Useful built-in LED light with SOS and long runtime for night emergencies.

Cons

• Wall charger is not included, so you must provide a charger to top up the unit after storage.
• The unit is larger than pocket-sized portable chargers, so it takes more trunk space.

Specifications

Peak Current	4000A
Supported Engines	All gas engines and diesel up to 10.0L
Output Ports	Dual USB, USB Type-C (5V/3A), 15V 10A output port
Operating Temperature	-4F (-20C) to 140F (60C)
Included Accessories	Smart jumper cable, USB to Type-C cable, EVA storage case, user manual
Safety Features	Spark-less protection, reverse polarity protection, 10 built-in protections

Our Verdict

The GOOLOO GP4000 is a practical, well-built jump starter for drivers who prioritize reliable starting power and safety features over minimal size. Its 4000A peak boost, durable clamps and device-charging outputs deliver strong value for those who travel with larger engines or in cold conditions, though buyers should be prepared to provide their own wall charger and allow a bit more storage space in the vehicle.

Frequently Asked Questions

How many times can this jump starter start a vehicle on a full charge?
On a full charge it can jump-start most vehicles over 60 times, depending on engine size and conditions.

Is a wall charger included?
No, a wall charger is not included; the package includes a USB to Type-C cable for charging the unit.

Can it operate in very cold weather?
Yes, the smart chip and design support dependable starts down to -4F (-20C).