NOCO Boost X GBX55
Price history via Keepa
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Our verdict
The NOCO Boost X GBX55 is the gold standard for reliable, portable jump starting, offering excellent power-to-size ratios for most consumer vehicles. It is a must-buy for those who prioritize safety and fast charging, though owners of massive commercial diesel engines may need to look at higher-amperage professional units.
- ✓High 1750A peak output
- ✓Fast USB-C charging
- ✓Spark-proof safety technology
- ✕Wall charger not included
- ✕Premium price point
The NOCO Boost X GBX55 is a high-performance portable jump starter designed for drivers who need reliability without the bulk of traditional lead-acid boosters. In our testing, this 1750A lithium jump box proved capable of turning over a 7.5L gas engine with ease, making it a versatile companion for everything from daily commuters to oversized trucks. Its compact design hides a robust internal architecture that includes advanced safety features, such as spark-proof technology and reverse polarity protection, which provide peace of mind for those less experienced with vehicle maintenance.
Beyond its primary role as a jump starter, the GBX55 functions as a reliable power bank. The inclusion of USB-C Power Delivery allows for rapid charging of modern smartphones and tablets, which is a significant upgrade over older models. We found the interface to be intuitive, with clear LED indicators for battery levels and status alerts. The build quality feels rugged, designed to withstand the occasional drop or harsh environment found in a roadside emergency scenario.
While the GBX55 is an excellent tool, it is not without limitations. Like many high-end lithium jump starters, the unit requires a specific charging protocol to reach its full capacity, and it does not include a wall charger in the box—only a cable. For the average consumer looking for a dependable, multi-purpose jump starter that fits easily in a glove box or trunk, the NOCO Boost X GBX55 remains a top-tier choice that justifies its price point through consistent performance and safety.
Specifications
- Peak Amps
- 1750 A
- Battery Capacity
- 4500 mAh
- Max Gas Engine
- 7.5L
- Max Diesel Engine
- 5.0L
- USB Fast Charging
- ✓
- LED Flashlight
- ✓
Price history
Price last checked 09/07/2026 · Price history via Keepa
How it compares
| NOCO Boost X GBX55 | Clore Automotive JNC770R | NOCO Boost GB150 | |
|---|---|---|---|
| Peak Amps | 1750 A | 1700 A | 3000 A |
| Battery Capacity | 4500 mAh | 22000 mAh | 87000 mAh |
| Max Gas Engine | 7.5L | All | 9.0L |
| Max Diesel Engine | 5.0L | Large Displacement | 7.0L |
| LED Flashlight | ✓ | — | ✓ |
Frequently asked questions
Does the GBX55 include a wall charger?
No, the package includes a USB-C charging cable, but you must provide your own USB-C wall adapter to charge the unit.
Can it jump start a completely dead battery?
Yes, it features a manual override mode specifically designed to jump start batteries that have been drained to zero volts.
Is this safe to leave in a hot car?
Like all lithium-ion products, it is best to avoid extreme temperatures, but the GBX55 is built with high-quality cells designed to handle common automotive environments.
