GOOLOO GP4000 Review: 4000 Amps on a Budget
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GOOLOO has become one of the most popular jump starter brands on Amazon by offering a lot of power for the money. The GP4000 is rated at 4000 peak amps, enough for every gas engine and diesels up to 10 liters.
In this GOOLOO GP4000 review, we look at its power, safety features, cold-weather performance and what you give up compared to premium brands.
GOOLOO GP4000
4.4 / 5 ReviewsWhiz Score- 4000A for all gas engines and diesels up to 10L
- Boost button for nearly dead batteries
- Dual USB and USB-C power bank
✅ Pros
- Huge power for the price
- Boost mode for very low batteries
- 10 built-in safety protections
- Works from -4°F to 140°F
- 18-month warranty
❌ Cons
- Bulkier than compact jump starters
- Wall charger not included
- Peak amp ratings are hard to compare across brands
GOOLOO GP4000 Key Specifications
| Peak current | 4000 amps |
| Engine size | All gas, up to 10L diesel |
| Safety | SuperSafe, 10 protections |
| Boost mode | Yes, for very low batteries |
| Operating temp | -4°F to 140°F |
| USB outputs | Dual USB + USB-C |
| Extras | LED light, 12V socket adapter |
| Warranty | 18 months |
Starting Power
GOOLOO rates the GP4000 for all gasoline engines and diesel engines up to 10 liters. A BOOST button can force output when the car battery voltage is too low for the jump starter to detect, which helps with completely dead batteries.
Keep in mind that peak amp numbers are not measured the same way by every brand, so focus on the engine size rating when comparing.
Safety
The SuperSafe system includes 10 types of protection against sparks, reverse polarity and misuse. The metal clamps are solid and the smart jumper cable shows status.
Cold Weather and Build
GOOLOO says the GP4000 works from -4°F to 140°F. The hardened plastic case has rubber corners to survive drops. A built-in flashlight helps during night breakdowns.
Power Bank and What Is in the Box
You get dual USB outputs (one fast-charging) and a USB-C port. The box includes the jump starter, smart jumper cable, USB-to-USB-C cable, cigarette lighter adapter and EVA storage case. A wall charger is not included. GOOLOO recommends charging it every two to three months when unused.
Who Needs a Jump Starter This Strong
The GP4000 is rated for all gas engines and diesel engines up to 10 liters. That makes it a good fit for heavy-duty pickups, big SUVs, RVs, boats, tractors and work vehicles. It also suits drivers in cold northern states, where batteries lose much of their power in winter and engines need more current to turn over.
For a small sedan, it is more power than needed, but some owners still choose it so one jump starter can handle every vehicle in the family.
How to Use the GP4000
- Turn off the vehicle and all accessories.
- Connect the red clamp to positive and the black clamp to negative or a solid ground.
- Power on the unit and wait for the ready indicator.
- Start the engine within the time window shown in the manual.
- Remove the clamps after the engine is running and switch off the jump starter.
If the battery is too low to be detected, the Boost mode forces output. Use it only after confirming the clamps are on the correct terminals, since it bypasses some protections.
GP4000 vs Other High-Power Jump Starters
| Model | Main strength | Trade-off | Best for |
|---|---|---|---|
| GOOLOO GP4000 | High peak rating, 18-month warranty | Bulkier than compact packs | Heavy-duty value |
| GOOLOO GT4000 | Similar power in a newer design | Price can vary | Shoppers comparing GOOLOO models |
| NOCO Boost GB150 | Proven brand, IP65 rated | Heavier, slow recharge | Fleets and trades |
| Avapow 4000A | Competitive price | Smaller support network | Budget high-power buyers |
A Note on Peak Amp Ratings
Peak amps are the most visible number on any jump starter box, but they are measured in different ways by different brands. A higher peak number does not always mean better real-world starting. More useful figures are the rated engine size, cold-weather operating range and how many starts the unit can deliver per charge.
The GP4000’s engine ratings and its -4°F to 140°F operating range are better guides to what it can do than the 4000A headline figure.
Charging, Storage and Warranty
The GP4000 charges over USB, but a wall charger is not included, so use a quality adapter. Recharge it after use and every few months in storage, and keep it away from extreme heat. The 18-month warranty is longer than many competitors, and GOOLOO includes a carry case and 12V socket adapter for running small accessories.
Using It in Cold Weather
Cold weather is when jump starters earn their keep. Lithium batteries deliver less power when they are very cold, so if you live where temperatures fall well below freezing, keep the GP4000 inside your home or in the cabin overnight, then take it out when you need it. A warm jump starter delivers more current and gives the engine a better chance to start. GOOLOO rates the GP4000 for -4°F to 140°F, which covers most US winters.
Common Mistakes to Avoid
- Leaving the unit flat for months between uses.
- Using Boost mode before checking clamp polarity.
- Cranking for long periods without rest.
- Storing it in a hot trunk through summer.
What Is in the Box
The GP4000 package includes the jump starter, smart clamps, a USB charging cable, a 12V cigarette socket adapter and a carry case. The case keeps the clamps and cable tidy and protects the unit in a trunk or toolbox. Remember that a wall charger is not included, so pick up a reliable USB adapter if you do not already have one.
Who Should Buy the GOOLOO GP4000?
Buy it if you want a high-power jump starter for trucks or diesels without paying premium prices.
Skip it if you want the smallest unit possible or a brand with a long safety track record. The NOCO GB40 or GBX45 is more compact.
Alternatives to Consider
- GOOLOO GT4000: Adds battery preheat for -40°F starts.
- NOCO Boost GB150: Premium 3000A option.
- Avapow 4000A: Another budget 4000A unit.
Final Verdict
The GOOLOO GP4000 offers big-engine power at a budget price. It is not the smallest or most premium jump starter, but for truck and diesel owners on a budget, it is a strong value.
Helpful Free Car Tools
- Jump Starter Size Calculator: Peak amps needed by engine size and climate.
- Browse all free car tools and calculators
Related Reviews
Frequently Asked Questions
What can the GOOLOO GP4000 start?
All gas engines and diesel engines up to 10L, according to GOOLOO.
Does it work in cold weather?
It is rated to work from -4°F to 140°F.
Is a wall charger included?
No. You get a USB-to-USB-C cable but not a wall adapter.
What is the BOOST button for?
It forces output when the car battery is too low for the jump starter to detect it.
How often should I charge it?
Every two to three months if you are not using it.
How we evaluated: this review is based on the manufacturer’s published specifications, the product’s feature set, and how it compares with competing products in the same price range. Product details and images are provided by Amazon and may change. Prices and availability are accurate as of the time shown on Amazon and are subject to change.