Find My Solution
Home › Product Database › Jump Starter › NOCO Boost X GBX45 1250A Jump Starter
Exact model imagery NOCO
NOCO Boost X GBX45 1250A Jump Starter
31Whstored energy
Output pendingcontinuous output
Verified internal spec page
Verified Product Page in Jump Starter NOCO

NOCO Boost X GBX45 1250A Jump Starter Review & Specs

Verified specifications, runtime planning, compatibility and buying options for this exact model.

Jump Starter Lithium-ion 31Wh Capacity Cars, SUVs, light trucks, and 12V engines…
Battery Lithium-ion
Capacity 31Wh
Output Pending verification
Weight 2.16 lb
Best for

Cars, SUVs, light trucks, and 12V engines up to 6.5L gas or 4.0L diesel

Research status

Current record status: Current.

Buying status Exact Amazon Match
Check Price on Amazon ↗ Add to Compare Review Methodology
Exact Amazon MatchCommerce routing follows the locked Amazon-only rule.
1 compatibility linksMapped expansion, accessory, or adjacent-system relationships.
How We VerifiedManufacturer-sourced specs plus internal normalization and evidence checks.

Best Battery Backups Spec Sheet

Battery ChemistryLithium-ion
Capacity31 Wh
Weight2.16 lb
StatusCurrent

Runtime Estimates (31Wh)

Wi-Fi Router (10W) ~2.6 hrs
Laptop (60W) ~0.4 hrs
CPAP Machine (40W) ~0.7 hrs
Mini Fridge (120W) ~0.2 hrs
LED TV (100W) ~0.3 hrs

Planning estimates use 85% usable energy. Actual runtime varies.

Pros & Cons

  • Lithium-ion battery chemistry
  • 1 compatibility relationships mapped
  • Exact Amazon product match verified
  • Runtime changes with real device load

✓ Best For

  • Cars, SUVs, light trucks, and 12V engines up to 6.5L gas or 4.0L diesel
  • Buyers comparing verified specifications
  • Runtime planning and backup sizing

× Not Ideal For

  • Loads above its continuous output
  • Buying without checking actual device wattage
  • Assuming every accessory is cross-compatible

Ports & Connectivity

  • Lithium-ion battery
  • 1 mapped cable / adapter requirements
NOCO Boost X GBX45 1250A Jump Starter connectivity overview

Compatibility & Expansion

↔
12V lead-acid starting batteries; up to 6.5L gasoline and 4.0L diesel enginesMapped compatibility record
→

How We Verified / Evidence Methodology

▦
Specifications

Manufacturer/model data

⚖
Fit & Comparison

Capacity and output

⌁
Compatibility

Mapped accessories

✓
Evidence

No guessed product images

Source verified against manufacturer documentation. Learn more about our verification process →

Top Alternatives

Compare Side by Side →

Compare Side by Side

See specs, capacity, output and exact buying links together.

Compare Now

FAQ

How much power does this model store?

31Wh of nominal capacity is currently recorded.

Can this run a refrigerator?

It depends on running wattage and compressor surge. Use our runtime calculator with the appliance load.

Can capacity be expanded?

Expansion and compatibility relationships are listed above where verified.

Is it safe for sensitive electronics?

Check output type, voltage requirements and device manufacturer guidance before use.

What solar panels are compatible?

Solar-input details are still being verified.

Where should I buy it?

We have an exact Amazon product match for this model.

Related Guides & Resources

Best Battery Backups

Continue your research without leaving Best Battery Backups.

Read Guide →

How to Size a Power Station

Continue your research without leaving Best Battery Backups.

Read Guide →

Runtime Calculator

Continue your research without leaving Best Battery Backups.

Read Guide →

How We Verify Products

Continue your research without leaving Best Battery Backups.

Read Guide →
186Products in database
186Product images populated
36Compatibility-mapped
94Exact Amazon matches

Affiliate disclosure: Best Battery Backups may earn a commission from verified paid links, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Read the full affiliate disclosure.

Scroll to Top

Detailed Review & Buying Guide

The NOCO Boost X GBX45 is a 12-volt lithium jump starter rated at 1,250 peak amps. NOCO specifies it for gasoline engines up to 6.5 liters and diesel engines up to 4.0 liters. It is a compact emergency booster for cars, crossovers, SUVs, light trucks, motorcycles, boats, ATVs, and other equipment that uses a compatible 12-volt lead-acid starting battery.

Quick verdict

The GBX45 is a strong choice for buyers who want a compact jump starter with fast bidirectional USB-C charging. Its 31Wh lithium-ion battery, 60-watt USB-C Power Delivery support, 100-lumen light, IP65 enclosure, and UltraSafe 2.0 protections make it useful as both a roadside starter and a small emergency power bank. It is intended for moderate engine sizes rather than heavy-duty diesel trucks.

Verified specifications

SpecificationNOCO GBX45
Peak current1,250 amps
Battery system12V lead-acid
Gas engine ratingUp to 6.5L
Diesel engine ratingUp to 4.0L
Internal energy31Wh lithium-ion
USB-CUp to 60W input/output
Flashlight100 lumens
Ingress protectionIP65 with ports closed
Dimensions6.83 × 3.28 × 2.08 inches
Weight2.16 pounds
Warranty1-year limited warranty

Fast charging and emergency power

A key advantage over older compact boosters is USB-C Power Delivery. With an appropriate 60-watt charger, NOCO states that the GBX45 can recharge in about 48 minutes. A five-minute charge can provide enough stored energy for a jump attempt when the booster is depleted. Charging speed depends on the power adapter and cable used; a basic low-wattage USB source will take substantially longer.

The USB-C port is bidirectional, so the unit can also charge phones, tablets, and compatible laptops. That is useful during a power outage or roadside emergency, although preserving enough energy for engine starting should remain the priority. NOCO rates the unit for up to six jump starts per charge under favorable conditions. Real results vary with temperature, engine size, battery damage, connection quality, and storage history.

Safety and operating limits

UltraSafe 2.0 provides spark-proof connection and reverse-polarity protection during normal operation. The 60-second output timer limits how long the high-voltage starting output remains active. Manual override is available when a deeply discharged battery is below the normal detection threshold, but using it disables standard safety protections. Confirm polarity and follow the official manual before engaging override.

Do not use the GBX45 on a 24-volt system or on a battery that is leaking, cracked, swollen, frozen, or otherwise unsafe. The published engine limits are not a guarantee that every vehicle will start in all conditions. A mechanically damaged engine, failed starter, bad cable connection, or severely failed battery can prevent a successful start even when displacement is within the stated range.

Who should buy it?

The GBX45 is well suited to drivers who want a modern, relatively light booster for common passenger vehicles and smaller diesels. Buyers with engines above 6.5 liters gasoline or 4.0 liters diesel should move to a higher-rated model. The exact Amazon listing tied to this page is NOCO GBX45, ASIN B0924V8SPC. Specifications, model identity, and imagery were verified against NOCO’s current product and specification pages on August 28, 2026.