NOCO Boost GBX45 UltraSafe Jump Starter 1250A
- 1250 A peak, 12 volt lithium
- Up to 6.5 L gas and 4.0 L diesel engines
- Spark-proof clamps with reverse polarity protection
- 60 W USB-C power bank output
- Clamps, storage bag and USB-C cable included
- 1.2 kg, 3.62 x 4.96 x 8.23 inches
- 1 year warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact lithium jump starter for engines up to the stated gas and diesel sizes, with spark-proof clamps and a fast-charging power bank port. The battery capacity entry looks wrong, so rely on the title ratings.
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ASIN: B0924V8SPCModel: GBX45Category: Jump Starters
Overview
A driver who wants a compact emergency starter gets a lithium jump pack with spark-proof clamps and reverse polarity protection to guard against hookup mistakes.
Safety features, a storage bag and a power bank port make it a practical glovebox item. The limitation is the engine size ceiling and a battery capacity entry that does not make sense.
Who it's for
Owners of cars, trucks, motorcycles, boats and other vehicles within the rated engine sizes can carry it for roadside emergencies. Fleet or commercial engines need a larger booster.
Pros and cons
- Reverse polarity protection
- USB-C power bank output
- Storage bag included
- Wide vehicle compatibility list
- Engine size ceiling for gas and diesel
- Battery capacity entry looks wrong
- Needs recharging to stay ready
Performance notes
A jump starter releases stored current through the clamps for a few seconds, so battery charge and engine size are the main limits. Reverse polarity protection stops current if the clamps are attached the wrong way round. A depleted pack cannot start a car, so periodic recharging matters.
Where it stands among jump starters
- #10 most-searched brand and model of the 42 jump starters lines we track (by search demand, not sales).
From the specs of the 64 jump starters we list; not a test result.
Specifications
| Brand | Noco |
|---|---|
| Model | GBX45 |
| Dimensions & fit | |
| Item weight | 1.2 kg |
| Item Dimensions D x W x H | 3.62 x 4.96 x 8.23 inches |
| Capacity & performance | |
| Peak Output Current | 1250 A |
| Battery Capacity | 250 amp_hours |
| Power & efficiency | |
| Battery Type | Lithium |
| USB c power | Power bank with 60W USB-C Power Delivery |
| Voltage | 12 volts |
| Compatibility & installation | |
| Compatible with Vehicle Type | ATV, motorcycle, passenger car, RV, tractor, truck, UTV, van, watercraft |
| Included components | |
| Included Components | Jump starter pack, heavy-duty clamps, microfiber storage bag, USB-C charging cable |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 1 Year Limited |
| Other details | |
| Engine rating | Up to 6.5 L gas and 4.0 L diesel |
| Automotive Fit Type | Universal Fit |
| Specification Met | energy |
Closest rivals on specs
WOLFBOX MegaVolt24 Jump Starter 4000A- Item Weight 2.65 vs 3 pounds (-12%)
GOOLOO A3 Jump Starter with Air Compressor 3000A- Item Weight 2.65 vs 3.6 pounds (-26%)
AstroAI S8 Jump Starter 1500A- Item Weight 2.65 vs 1.59 pounds (+67%)
Frequently asked questions
How do I connect the NOCO Boost GBX45 to a battery?
The listing gives no steps. It names spark-proof clamps with reverse polarity protection, so follow the user manual.
Will the NOCO Boost GBX45 start a large diesel?
The rating is up to 4.0 L diesel and 6.5 L gas, so larger engines are not covered.
Can the NOCO Boost GBX45 charge a laptop?
The listing names a power bank with 60W USB-C Power Delivery but does not list devices.