93.5
Best for organized drivers who want quick access to paperwork
- Hidden magnetic closure
- Eco friendly PU leather
- Six transparent compartments
$8
Head to head · Car Accessories
Jump Starter A9 12V 4000A UltraSafe Portable vs GP4000 Jump Starter
Ravvy scores Jump Starter A9 12V 4000A UltraSafe Portable at 89.19 and GP4000 Jump Starter at 93.5. GP4000 Jump Starter takes the overall pick, best for owners of large trucks, rvs, and those living in extreme climates.
89.2
$42
A high value emergency kit essential that balances extreme peak power with a compact form factor, though it requires periodic maintenance charging to remain reliable.
Ravvy pick
GOOLOO
GP4000 Jump Starter
93.5
$80
The GOOLOO GP4000 is a top-tier choice for those who need raw power for large engines, though users must accept its bulkier 3.9-pound footprint.
How they score
| Factor | Jump Starter A9 12V 4000A UltraSafe Portable | GP4000 Jump Starter |
|---|---|---|
| Peak Power | 94 | – |
| Portability | 96 | 78 |
| Versatility | 85 | – |
| Charge Speed | 82 | – |
| Safety Features | 90 | 95.5 |
| Build Quality | – | 94 |
| Battery Longevity | – | 92 |
| Engine Compatibility | – | 98 |
Jump Starter A9 12V 4000A UltraSafe Portable
What owners praise
- Powerful 4000A peak current for large engines
- Ultra compact design fits in small storage compartments
- Smart LCD screen provides precise battery monitoring
- QC3.0 fast charging for mobile devices
- Comprehensive 10 point safety protection system
What to know first
- Lower total Wh capacity compared to larger units
- Requires recharging every 3 months for peak health
- Charging cable is included but wall adapter is not
Skip it if commercial heavy duty truck fleets requiring high cycle frequency
GP4000 Jump Starter
What owners praise
- Immense 4000A peak current starts large 10L engines
- Heavy-duty all-metal clamps provide superior conductivity
- Boost function bypasses dead battery resistance effectively
- Sturdy rubberized housing resists drop damage
- Includes a high-quality EVA carrying case for protection
What to know first
- Notably heavier than standard portable jump starters
- Wall charging block is not included in the box
- USB charging cables could be longer for better reach
Skip it if compact car owners seeking a lightweight glovebox accessory
Specs side by side
| Spec | Jump Starter A9 12V 4000A UltraSafe Portable | GP4000 Jump Starter |
|---|---|---|
| ASIN | B0FLDV9RYC | B09HJH1S41 |
| Brand | VACASSO | GOOLOO |
| Voltage | 12 volts | 12 volts |
| Amperage | 4000 A | 4000 A |
| Brand Name | VACASSO | GOOLOO |
| Unit Count | 1 Count | 1 Count |
| Battery Type | Lithium Polymer | Lithium Polymer |
| Manufacturer | DONGGUAN CHUANGYI NEW ENERGY TECHNOLOGY CO., LTD | GOOLOO |
| Model Number | A9 | GP4000 |
| Number of Items | 1 | – |
| Number of Packs | 1 | – |
| Battery Capacity | 10000 milliamp_hours | 24000 milliamp_hours |
Other options in this category
93.5
Best for organized drivers and new car owners
- Premium PU leather construction
- Dual large document pockets
- Hidden magnetic seal
$6
93.4
Best for professionals who work from their car and owners of modern usb-c laptops
- Built-in 29.5-inch retractable cable
- 45W + 30W independent charging lanes
- Universal USB-C Power Delivery compatibility
Price unavailable