GOOLOO jump starter: match the model to your engine
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Quick answer
GOOLOO sizes its 12 V jump starters by engine. The A3 (3000A) lists gas engines up to 9.0 L and diesels up to 6.5 L, 50+ starts per charge and a built-in tire inflator. The GT4000S (4000A) adds 100W two-way USB-C charging, but its own page gives two engine limits (12.0 L or 10.0 L gas), so use the lower one. The GT Truck Pro (10000A) is built for pickups and heavy trucks, with 80 starts per charge, LiFePO4 cells rated to -40°F and 7.7 lb of weight.
Three GOOLOO models compared
| Spec | A3 with Air Compressor | GT4000S | GT Truck Pro |
|---|---|---|---|
| Peak current | 3000A | 4000A | 10000A |
| Engines listed | Up to 9.0 L gas, 6.5 L diesel | Up to 10.0 L gas, 8.0 L diesel (also stated as 12.0 / 10.0 L) | Big rigs, machinery, pickups, off-road |
| Starts per charge | 50+ | Not stated | 80 |
| Battery | Not stated | Not stated | 64,000 mAh, eight LiFePO4 cells |
| Operating range | -20 to 60°C (-4 to 140°F) | Not stated; IP65 | -40 to 60°C (-40 to 140°F) |
| Standby | Keeps 90% after 24 months | 24 months | 36 months |
| Extras | Tire inflator, USB-C and USB-A | 100W USB-C two-way, 18W USB-A, 15V/10A DC | 65W charging, 12V/10A DC, 8 LEDs |
Start with your engine size from the owner's manual, then pick a model whose listed limit covers it with room to spare.
A3: jump starter plus tire inflator
The A3 is GOOLOO's two-in-one for a typical car or SUV:
- 3000A peak for gas engines up to 9.0 L and diesels up to 6.5 L, with 50+ starts per charge.
- A built-in air pump that GOOLOO says fills a 205/55 R16 tire from 0 to 36 PSI in under 7 minutes, with a display readable in sunlight in PSI, Bar or kPa.
- USB-C (5V/2A) and USB-A (5V/2.4A) ports for phones, plus a 3-mode LED light.
- GOOLOO says it keeps 90% of its charge after 24 months in standby, and lists an operating range of -20 to 60°C.
If you want one device in the trunk for both a dead battery and a soft tire, this is the GOOLOO built for that.
GT4000S: more current and a laptop-grade port
The GT4000S trades the air pump for power output:
- 4000A peak and a 100W two-way USB-C port that both recharges the unit and charges a laptop, plus 18W USB-A and a 15V/10A DC output.
- GOOLOO says it recharges from empty in 1.2 hours (a 100W wall charger is sold separately), keeps charge for 24 months in standby and is IP65 rated against rain and dust.
- The box includes clamps, a 100W car charger, cables and a storage bag.
Watch the engine rating. One paragraph on GOOLOO's page says it handles 12.0 L gas or 10.0 L diesel engines; another says up to 10.0 L gas and 8.0 L diesel. Until GOOLOO clarifies, plan around the lower figures.
GT Truck Pro: for pickups and heavy equipment
- Power: 10000A, which GOOLOO aims at big rigs, construction machinery, pickups and off-road vehicles. Holding the 12V button for 2 seconds or more forces a start on a deeply dead battery.
- Cells and cold: eight LiFePO4 cells rated from -40 to 60°C, with 64,000 mAh for 80 jump starts or 17 phone charges per charge.
- Size: 7.7 lb (3,500 g) and 245 x 220 x 150 mm, about 9.6 x 8.7 x 5.9 in, which GOOLOO says fits behind truck seats.
- Power out: a 12V/10A DC socket (up to 120 W, since 12 x 10 = 120) for small fridges and pumps; 65W charging refills it in 3.7 hours.
GOOLOO aims it at trucks and equipment; for an ordinary car its size and weight are more than you need.
Charging, storage and safety
- Keep it charged: the standby figures (24 to 36 months) are maker claims, so check the charge level when you change seasons rather than assuming it is full.
- Cold: the A3 is rated down to -20°C (-4°F) and the Truck Pro to -40°C (-40°F); GOOLOO's GT4000S page gives no operating range, so check its manual if you live somewhere very cold.
- Follow the manual: connect clamps and start the engine in the order GOOLOO's manual for your model gives, and use the force-start button only as described.
- Recalls: a search of the U.S. Consumer Product Safety Commission site on October 15, 2026 returned no GOOLOO recalls; check again before buying.
What to look for when you buy
Car and tire example: GOOLOO A3 with Air Compressor
Best for: Cars and SUVs where one device should handle a dead battery and a low tire
GOOLOO lists 3000A for up to 9.0 L gas and 6.5 L diesel engines, 50+ starts, an inflator that fills a 205/55 R16 tire to 36 PSI in under 7 minutes and 90% charge after 24 months standby.
Watch out: Operating range stops at -20°C (-4°F); not sized for heavy trucks.
See options on Amazon (opens Amazon in a new tab)Laptop-charging example: GOOLOO GT4000S
Best for: Larger engines plus 100W USB-C device charging
GOOLOO lists 4000A, 100W two-way USB-C, 18W USB-A, 15V/10A DC, IP65, a 1.2 hour recharge and 24 month standby.
Watch out: Its page gives two engine limits (12.0 L or 10.0 L gas); use the lower. No air pump.
See options on Amazon (opens Amazon in a new tab)Truck and equipment example: GOOLOO GT Truck Pro
Best for: Pickups, heavy trucks, machinery and very cold climates
GOOLOO lists 10000A, eight LiFePO4 cells rated -40 to 60°C, 64,000 mAh for 80 starts, 36 month standby and a 12V/10A DC outlet.
Watch out: 7.7 lb and 245 x 220 x 150 mm; a 65W charge takes 3.7 hours.
See options on Amazon (opens Amazon in a new tab)Questions people ask
- Which GOOLOO jump starter do I need?
- Match your engine size: the A3 lists up to 9.0 L gas and 6.5 L diesel, the GT4000S up to 10.0 L gas and 8.0 L diesel (lower of its two figures), and the GT Truck Pro targets heavy trucks.
- How long does a GOOLOO jump starter hold a charge?
- GOOLOO lists 24 months standby for the GT4000S, 90% after 24 months for the A3 and 36 months for the GT Truck Pro. Check it each season anyway.
- How do I charge a GOOLOO jump starter?
- GOOLOO lists 1.2 hours from empty for the GT4000S, which recharges through its 100W two-way USB-C port, and 3.7 hours for the GT Truck Pro with 65W fast charging.
- Does GOOLOO make a jump starter with an air compressor?
- Yes. The A3 combines a 3000A jump starter with a tire inflator and a sunlight-readable pressure display.
Sources
- A3 3000A Supersafe Jump Starter with Air Compressor, GOOLOO
- GT4000S 4000A Supersafe Jump Starter, GOOLOO
- GT Truck Pro 10000A Supersafe Jump Starter, GOOLOO
- CPSC site search: GOOLOO, U.S. Consumer Product Safety Commission