GOOLOO GP4000 Jump Starter 4000A Peak - Compact 12V Car Booster

In this review of the GOOLOO GP4000 Jump Starter, the bottom line is simple: it is aimed at drivers who want a compact, dependable 12V booster that can restart large engines quickly. The review finds the biggest reason to buy is its combination of a true 4000A peak boost and a high-capacity portable charger in one handy package, which makes it useful for cars, trucks, ATVs and marine use. The unit is especially valuable if you need repeated jump-starts on a single charge or a rugged, cold-weather capable emergency power source.

Key Features

• 4000A Peak Boost: Delivers a forceful restart even when battery voltage is extremely low, making cold-crank or dead-battery recoveries fast and reliable.
• Starts Large Engines: Rated to start all gasoline engines and diesel engines up to 10.0L, which covers most cars, pickups, RVs and many diesel work vehicles.
• Massive Portable Capacity: Acts as a power bank with dual USB outputs and a USB Type-C 5V/3A port so you can charge phones, tablets and recharge the unit itself.
• Durable Design: Hardened plastic with rubber corners and metal clamps on the smart jumper cables protect the unit during drops and long-term use.
• Built for Extremes: The internal smart chip supports reliable starts in temperatures from -4F to 140F, useful for winter or hot climate emergencies.
• Emergency Ready: Built-in flashlight and ability to jump most vehicles over 60 times on a full charge provide real-world emergency value.

Who It's For

The GP4000 suits drivers who want a compact, high-output jump starter that also doubles as a portable charger: commuters, pickup owners, RV users and owners of motorcycles, ATVs or snowmobiles will all find it useful. It is especially good for anyone who values a short start time and a device that can be recharged via Type-C.

Those who should look elsewhere include users who need an integrated wall charger in the box or who require an extremely lightweight, minimal-capacity unit for occasional use; the GP4000 favors robust capacity and ruggedness over the absolute smallest footprint.

Pros & Cons

Pros

• High peak current and fast starts even from very low battery voltage.
• Large battery capacity with multiple charging ports including fast-charge capable USB and Type-C.
• Sturdy clamps and rugged build with a useful built-in flashlight for roadside emergencies.
• Reliable performance in extreme cold and hot temperatures.

Cons

• Wall charger is not included in the box, so a separate charger is needed to top up the unit from wall power.
• The unit is compact but not the lightest option if absolute minimal weight is a priority.

Specifications

Peak Current	4000A
Output Voltage	12V
Engine Compatibility	All gasoline and diesel up to 10.0L
USB Outputs	Dual USB ports (one fast charge) and USB Type-C 5V/3A
Operating Temperature	-4F (-20C) to 140F (60C)
Included Accessories	Smart jumper cable, USB-C cable, cigarette lighter adapter, EVA case
Warranty	8 months plus lifetime tech support

Our Verdict

The GOOLOO GP4000 is a practical choice for drivers who need a powerful, multiuse 12V jump starter that also doubles as a portable charger. Its 4000A peak current, rugged build and reliable cold-weather performance make it good value for anyone who wants a single device to handle repeated emergency starts and device charging on the road.

Frequently Asked Questions

How many jump-starts will a full charge provide?
A full charge can deliver over 60 jump-starts for most vehicles depending on engine size and conditions.

Can it start diesel trucks?
Yes, it is rated to start diesel engines up to 10.0L.

Is a wall charger included?
No, a wall charger is not included; recharge via USB Type-C or an appropriate external charger.