Automotive Diagnostics

NOCO Boost X GBX45 Review: 1250A Extreme USB-C Fast-Charging Booster

Hands-on review of the NOCO Boost X GBX45 lithium jump starter. How PX Lithium technology and 60W USB-C fast charging change the roadside emergency game.

Marcus Vance, Lead Diagnostic Specialist

Published September 14, 2026 • 7 min read • Bench Tested

Exact Hardware Tested: NOCO Boost X GBX45 Lithium Jump Starter

30-SECOND VERDICT

Bottom Line Evaluation

9.6 / 10

The pinnacle of rugged jump-starting engineering. Delivers 1250A of explosive cold-cranking power with USB-C PD fast-charging that recovers a dead unit in just 48 minutes.

PROS

1250A peak burst starts up to 6.5L gasoline and 4.0L diesel engines
60W two-way USB-C Power Delivery charges phones, tablets, and laptops at full speed
UltraSafe 2.0 spark-proof design with thermal protection and reverse polarity lock
Charges from 0% to jump-ready in just 5 minutes of vehicle cigarette lighter charging

CONS

More expensive than basic entry-level boosters (.95 MSRP)
No integrated air compressor (jump-starting and power delivery focus only)

Check Latest Price on Amazon (.95) →

The previous generation NOCO GB40 was a legend, but slow micro-USB recharge times (up to 3 hours) meant drivers often had a dead booster when an emergency hit. The NOCO Boost X GBX45 completely overhauls the internal architecture with PX Lithium Technology and two-way 60W USB-C Power Delivery.

5-Minute Emergency Flash Charge

Forgot to charge your jump starter? Plug the GBX45 into your vehicle's 12V auxiliary port or a fast-charging phone adapter for just 5 minutes, and it absorbs enough energy to deliver a full 1250A jump start.

Technical Specifications Comparison

Peak Starting Current	1,250 Amps
Engine Ratings	Up to 6.5L Gas / 4.0L Diesel
USB-C Fast Charging	60W Power Delivery In/Out
Internal Battery	31 Watt-Hour PX Lithium
Flashlight	100 Lumens Ultra-Bright LED

Ready to Upgrade Your Gear Loadout?

All products tested on our workbench are acquired independently. Buying through verified Amazon links supports our lab at zero extra cost to you.

View NOCO Boost X GBX45 Lithium Jump Starter on Amazon (.95) →