NOCO Boost Max 24V 3000A Jump Starter - GB251

NOCO GB251 Boost Max 24V 3000A Jump Starter: Extreme Power for Heavy-Duty Vehicles

The NOCO GB251 Boost Max is a high-powered lithium-ion jump starter engineered to tackle the toughest jobs with ease. Delivering 3,000 amps of peak current, it is designed to jump start petrol and diesel engines up to 32 litres, making it the perfect partner for heavy commercial vehicles like semi-trucks, buses, motorhomes, construction, agricultural, and mining equipment.

Powerful and Versatile

The GB251 handles some of the largest engines on the road — including 6, 8, 12, and 16-cylinder engines — making it a truly commercial-grade jump starter. Despite the heavy-duty power, its advanced lithium technology allows it to remain the most compact and lightweight jump starter in its class, weighing only about 6.3 kilograms (14 pounds). It comes with a portable carrying case, making jump starting easier and more convenient wherever you are.

Safety and Smart Features

Safety is top priority with this unit’s UltraSafe 2.0 technology featuring spark-proof design and reverse polarity protection, preventing damage or accidents due to incorrect connections. It also offers improved thermal efficiency and power management to extend battery life and reliability. The integrated digital battery voltmeter provides real-time diagnostics, helping you assess battery health and readiness.

Rapid Recharging and Extended Use

The GB251 supports rapid recharge technology, allowing it to recover from 0 to 100% charge up to four times faster than competing models, with a full recharge in approximately 8.5 hours. It can be charged directly from a vehicle’s 12V auxiliary port or with an optional 4-Amp power adapter. Its substantial 137+ watt-hour lithium-ion battery capacity also doubles as a portable power bank, with dual 2.1A USB ports plus Micro USB outputs to recharge smartphones, tablets, and other USB devices during your travels.

Built-in Illumination

If you ever find yourself in a situation requiring extra light, the GB251 has you covered with its powerful 600-lumen LED flashlight. This light offers multiple modes, including SOS and emergency strobe, making it invaluable for roadside repairs, night-time visibility, and signalling during emergencies.

Specifications at a Glance

• Voltage: 24V
• Peak Current: 3,000 amps
• Engine Compatibility: Petrol and diesel engines up to 32.0 litres or more
• Battery Capacity: 137+ watt-hours lithium-ion
• USB Output: Two 2.1A USB ports and one Micro USB port
• Recharge Time: Approx. 8.5 hours (rapid recharge)
• Flashlight Brightness: 600 lumens with SOS and strobe modes
• Weight: 6.3 kg (14 pounds)
• Includes: Portable carrying case for convenience

Practical Tips

For safe operation, always connect the positive clamp to the battery’s positive terminal first, then connect the negative clamp to a clean, unpainted metal part of the vehicle chassis or engine block. Avoid connecting to the negative battery terminal directly to prevent sparking. Limit cranking the engine to five seconds at a time, allowing intervals between attempts. Keep your jump starter charged regularly for best performance.

Product Specifications