GOOLOO GT4000S Jump Starter 4000A
- 4000A peak, 12V vehicles
- Gas engines up to 12.0L, diesel up to 10.0L
- 20,000 mAh capacity, up to 60 jump starts per full charge
- 100W two-way Type-C, full recharge in 1.2 hours
- 15V/10A DC output for inflators and inverters
- 3 USB ports plus a 400-lumen light with 3 modes
- 24 months standby, recharge every 3 months in storage
- 3.2 inch LED screen, 10 built-in protections
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Worth carrying for drivers of large gas or diesel engines, with fast recharging and laptop charging built in. No wall adapter is listed in the box, so home recharging relies on your own Type-C charger.
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ASIN: B09M9HQG73Category: Jump Starters
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Overview
Not a set of jumper cables that needs a second car, the GOOLOO pack starts an engine from its own lithium battery. Clamp the leads on, watch the status screen, and crank; between jumps the same pack charges phones, laptops and inflators.
Fast two-way charging sets it apart: a short top-up from the car charger can be enough for a start, and the Type-C port runs a laptop. A wall charger is not in the box, and the large engine coverage is a maker claim worth checking against your vehicle.
Who it's for
Drivers who travel with laptops and run large engines get one pack for both jobs, plus a light for night stops. Those wanting an air compressor in the same box will need a separate inflator.
Pros and cons
- Fast 100W two-way Type-C charging
- Charges laptops through Type-C
- Covers gas up to 12.0L, diesel 10.0L
- 15V/10A DC output for inflators
- No wall charger in the box
- Weight not listed
- Laptop charging works through Type-C only
- Standby claim conflicts with recharge advice
Performance notes
Output depends on charge level and on how cleanly the clamps grip the terminals, and the status screen tells you when to crank. Charging is restricted to a narrower temperature band than storage, so a pack left in a freezing car may need warming before it takes a charge.
Specifications
| Brand | Gooloo |
|---|---|
| Dimensions & fit | |
| Engine size | Gas up to 12.0L, diesel up to 10.0L |
| Capacity & performance | |
| Peak Output Current | 4000A |
| Operating temperature | -4 °F |
| Charging temperature | 14 °F |
| Power & efficiency | |
| USB c power | 100 watts |
| Voltage | 12 volts |
| Other details | |
| USB ports | 3 |
| Flashlight | 400 lumens, SOS, spotlight, strobe |
| Jump starts per charge | Up to 60 |
| Protections | 10 built-in |
| Standby time | 2 years |
| Display | 3.2 inch LED screen |
| Recharge time | 1.2 hours |
Frequently asked questions
Can the GOOLOO GT4000S charge a laptop?
Yes, at up to 100W through the Type-C port only.
How long can the GT4000S be stored without charging?
GOOLOO quotes 24 months of standby time but also advises recharging at least once every 3 months during long-term storage. Follow the 3-month advice.
Does the GOOLOO GT4000S inflate tires?
No inflator is built in. Its 15V/10A DC output can power a compatible 12V or 15V tire inflator, which is not included.
Can I charge the GT4000S in a cold car?
Charging is rated for 14 F to 113 F, so charge it indoors in freezing weather. Use and storage are rated from -4 F to 140 F.