NOCO Boost GBX45 1250A UltraSafe Jump Starter
- Jump Starter
- More reviewed than 76%
A high-output jump starter built with bigger gas and diesel engines in mind, with real safety features and USB-C charging that also make it useful as a power bank.
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How it ranks among the 17 jump starters we track
4.5★ across 15,300 Amazon ratings, Bayesian-smoothed toward the category average.
15,300 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
4,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 17 jump starters we track - how the scorecard works · full jump starters data report. Confidence: limited - incomplete product information.Updated 8 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A 1250-amp lithium jump starter built for larger engines, rated up to a 6.5L gas or 4.0L diesel, with spark-proof clamps, reverse polarity protection, and a USB-C port that also works as a power bank.
NOCO positions the GBX45 as the higher-output model in its Boost X line, and the rated amperage backs that up against bigger trucks and diesel engines rather than compact cars. The 60-second timer is a deliberate power-conservation feature, not a flaw, letting the unit deliver up to six jump starts per charge rather than draining fast on repeated attempts.
- 1250A lithium jump starter
- Rated up to 6.5L gas / 4.0L diesel engines
- 48-minute USB-C recharge, up to 6 jumps per charge
- Built-in 100-lumen LED flashlight
Who it's for
Owners of trucks, SUVs, diesel vehicles, or anyone who wants a jump starter capable of larger engines and some headroom for repeated attempts. Overkill for someone who only ever needs to jump a small commuter car.
Strengths and trade-offs
Drawn from this product's published specifications.
- Rated up to 6.5L gas, 4.0L diesel
- Recharges in about 48 minutes via USB-C
- Doubles as a 60W USB-C power bank
- Spark-proof and reverse polarity protected
- Higher output than a small car needs
- 60-second timer limits each jump-start attempt
- Heavier-duty clamps than a compact jump starter
Performance notes
The lithium pack delivers up to 1250 amps through spark-proof clamps, with a 60-second timer built in to manage the high-voltage discharge and stretch each charge across roughly six jump starts. USB-C Power Delivery handles both directions, recharging the unit itself in about 48 minutes or pushing 60 watts out to charge a phone, tablet, or laptop, and a 100-lumen LED with multiple modes, including SOS and strobe, is built in for working in low light.
Specifications
| Brand | Noco |
|---|
Other Noco jump starters
How it compares
This product against the closest alternatives we track in jump starters.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| NOCO Boost GBX45 1250A UltraSafe Jump StarterThis product | 4.5 / 5 | 15,300 | 2.7 / 5 |
| Clore Automotive Jump-N-Carry JNC660 1700 Peak Amp 12 Volt Jump StarterClore Automotive | 4.6 / 5 | 19,800 | 4.8 / 5 |
| Hulkman Alpha85 Smart Portable Jump StarterHulkman | 4.7 / 5 | 13,400 | 4.5 / 5 |
| S ZEVZO ET03 Car Jump Starter 4000A Jump Starter Battery Pack for Up to 8.0L Gas and 7.0L…S Zevzo | 4.6 / 5 | 6,500 | 4.6 / 5 |
| WOLFBOX 4000A Jump StarterWolfbox | 4.7 / 5 | 5,900 | 4.6 / 5 |
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Questions about the Noco jump starters
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Can the NOCO GBX45 jump a diesel truck?
Yes, it is rated for diesel engines up to 4.0L as well as gas engines up to 6.5L.
How many jump starts does one charge provide?
NOCO states up to six jump starts per charge, helped by the built-in 60-second timer that conserves power on each attempt.
Can I use it to charge my phone?
Yes, the 60-watt USB-C port charges phones, tablets, and laptops and also works as a power bank.