NOCO Boost X 12V 4250A Jump Starter - GBX155

NOCO GBX155 Boost X 12V 4250A Jump Starter: Power and Speed for Serious Starts

The NOCO GBX155 Boost X is a high-capacity lithium-ion jump starter designed for tackling large engines with ease. Boasting an impressive 4,250 amps of peak current, it can jump-start petrol engines up to 10.0 litres and diesel engines up to 8.0 litres. Whether you’re working on cars, trucks, motorcycles, ATVs, boats, RVs, vans, SUVs, or tractors, this device offers dependable starting power whenever you need it.

Ultra-Fast Charging with USB-C Power Delivery

This jump starter incorporates cutting-edge PX Lithium Technology, enabling ultra-fast charging via USB-C Power Delivery. It can recharge from zero to jump-start ready in just 5 minutes, and completes a full recharge in approximately 2.7 hours. This rapid recharging capability keeps you ready for multiple quick starts without delay, a vital advantage whether on the road or at a busy workshop.

Advanced Safety Features

Safety is paramount with the GBX155, which comes equipped with NOCO’s UltraSafe 2.0 technology. This includes spark-proof operation to prevent igniting sparks during connection, reverse polarity protection to avoid damage from incorrect connections, and enhanced thermal efficiency plus power management to prolong battery life and optimise performance.

Multi-Use Power Bank Functionality

Apart from jump-starting, the GBX155 doubles as a portable power bank. It features USB-C PD input/output charging at 60W, along with a 2.1A USB-A output to recharge your phones, tablets, laptops, and other USB compatible devices easily while on the go. It’s an all-in-one power solution for emergencies or extended outdoor use.

Bright LED Flashlight for Emergencies

The unit includes an integrated 500-lumen LED flashlight with multiple lighting modes, including SOS and strobe. This makes it a practical tool for roadside emergencies, night-time repairs, or signalling for help when visibility is low.

Specifications Overview

• Voltage: 12V
• Peak Current: 4,250 amps
• Engine Compatibility: Petrol engines up to 10.0 litres, diesel up to 8.0 litres
• Battery Type: PX Lithium-ion technology
• USB Charging: USB-C PD 60W input/output, USB 2.1A output
• Recharge Time: 2.7 hours full recharge, 5 minutes for jump start readiness
• Power Conservation: 60-second auto-shutdown window after jump start
• Flashlight: 500 lumens with SOS and strobe modes
• Warranty: 2 years

Usage Tips for Best Results

Always connect the positive clamp first to the positive battery terminal, followed by the negative clamp to a solid, unpainted metal ground point away from the battery to minimise sparks. Keep cranking attempts brief—about five seconds each—and allow time between tries. Make sure to recharge your jump starter regularly to maintain readiness and maximise battery life.

Product Specifications