NOCO Boost Max GB251 24V 3000A UltraSafe Jump Starter — 15 lb Portable Lithium Booster for Up to 32L Engines, USB Power & 600-lume

The NOCO Boost Max GB251 is a professional 24V lithium jump starter delivering up to 3,000 amps of safe, compact starting power for commercial and heavy-duty diesel and gasoline engines.

Built for fleets, trades, and heavy equipment operators, the GB251 replaces bulky starter systems with a lightweight, 15 lb unit that starts engines up to 32 liters. It pairs NOCO’s patented UltraSafe Technology—spark-proof connections and reverse polarity protection—with a fast 3-hour recharge, integrated USB power outputs, and a bright 600-lumen LED with multiple modes. The kit arrives complete with a 56W XGC charger, international AC cords, extension cables, and a protective EVA case, making it ready for global fieldwork and emergency response.

How does the GB251 handle the largest engines?

The GB251 is engineered to deliver massive peak amperage for immediate cranking on the biggest 24V systems. Its 3,000-amp peak output is tuned to engage high-displacement diesel and gasoline engines used in Class 8 trucks, buses, and specialized equipment.

• Starts gasoline and diesel engines up to 32 liters.
• Designed for 6, 8, 12, and 16-cylinder commercial engines.
• Delivers commercial-grade power while remaining significantly lighter than traditional booster packs.

What safety features prevent mistakes during use?

NOCO’s UltraSafe Technology reduces user error by eliminating sparks and blocking reverse polarity connections. These protections let technicians and first responders connect quickly without risking damage to vehicle electronics or the unit itself.

• Spark-proof clamps eliminate ignition sparks at connection.
• Reverse polarity protection prevents incorrect hookup damage.
• Robust construction for heavy-duty field environments.

Can the GB251 double as a power bank and flashlight in the field?

Yes—the GB251 includes USB outputs to charge phones, tablets, and essential electronics, plus a precision 600-lumen LED with seven modes for worksite illumination and emergency signaling. It’s built to keep crews connected and safe during roadside or remote operations.

• Integrated USB power bank for essential device charging.
• 600-lumen LED with standard, SOS, and strobe modes.
• Fast recharge: full battery in approximately 3 hours using the included 56W adapter.

What’s included and how rugged is the package for transport?

The GB251 ships with everything needed for professional use: the jump starter, 56W XGC power adapter, region-specific AC cords (AU, EU, US, UK), XGC extension cables, and a Max Protection EVA case. The compact, 15-pound design minimizes storage bulk while protecting the unit in transit.

• Max Protection EVA case for impact resistance and organized storage.
• International AC cords and extension cables for global charging options.
• Backed by a 1-year limited warranty and engineered in the USA.

Who is this for: The NOCO Boost Max GB251 is aimed at fleet managers, heavy-equipment operators, emergency services, and commercial technicians who need a dependable, portable 24V starting solution. If you operate large diesels, run vocational fleets, or require a compact backup power system that doubles as a high-output flashlight and power bank, the GB251 balances industry-leading starting power with safety features and convenient portability.