NOCO Boost Max GB250 5250A UltraSafe Jump Starter 12V Lithium Battery Booster Pack Portable Jump Box Power Bank

The GB250 Boost Max is one of the most powerful lithium jump starters ever designed, delivering an incredible 5,250 amps of peak starting power to jump start gasoline and diesel engines up to 16 liters. Engineered specifically for commercial and industrial use, it starts the largest Class 8 trucks, buses, motorhomes, agricultural equipment, construction machinery, mining vehicles, and vocational fleets—covering 6, 8, 12, and even 16-cylinder engines with ease. At the core of its safety system is NOCO’s patented UltraSafe Technology, featuring spark-proof connections and reverse polarity protection to ensure safe, mistake-free operation on any 12-volt battery—trusted by professionals around the world. Despite its immense power, the GB250 weighs just 15 pounds, replacing bulky, outdated alternatives with a compact, portable design that fits in its custom EVA protective case. It also functions as a portable power bank with integrated USB output to charge smartphones, tablets, and other essential devices, and recharges fully in just 4 hours using the included 56W power adapter. For added utility, it features a precision-engineered 600-lumen LED flashlight with seven light modes—including SOS and emergency strobe—making it ideal for roadside repairs, emergency response, and low-light work environments. Included in the box are the GB250 12V UltraSafe Lithium Jump Starter, 56W XGC power adapter, four interchangeable AC cords (Australia, Europe, North America, United Kingdom), XGC extension cables,

Highlights: BOOST MAX SERIES — One of the most powerful lithium jump starters ever. Up to 5,250 amps to start gas and diesel engines up to 16L - engineered for commercial and industrial engine starts. ULTRASAFE TECHNOLOGY — Patented spark-proof and reverse polarity protection ensures safe, mistake-free connections on any 12V battery - trusted by professionals worldwide. COMMERCIAL-GRADE POWER — Starts nearly any engine - Class 8 trucks, buses, motorhomes, agricultural, construction, mining, and vocational equipment - 6, 8, 12, and 16 cylinders. PORTABLE POWER BANK — Integrated power bank delivers emergency power to smartphones, tablets, and more. Fully recharges in 4 hours with the included 56W power adapter. INTEGRATED LED FLASHLIGHT — Precision-engineered 600-lumen LED with 7 light modes, including SOS and strobe. Illuminate repairs, emergencies, or low-light environments. COMPACT FOR ITS CLASS — Only 15 lb, yet delivers unmatched starting power. Replaces oversized units with a compact design - engineered to start the largest and most demanding engines. WHAT’S IN THE BOX — GB250 jump starter, 56W power adapter, AC cords (AU, EU, US, UK), XGC adapters, and EVA protective case. Backed by a 1-year warranty and engineered in the USA.

How it fits your day: Use the key specs and highlights above to match it to your setup, space, or routine before you check out.

Customer feedback: 4.6/5 average rating.

Customers say: Customers find the jump starter effective at starting diesel trucks, even at below zero temperatures, and appreciate its power and portability with a nice carry bag.

Review snippets: Functional with Good battery life. Easy to use and durable. The carry case is convenient and practical for when the booster is not in use. Read more / Best jump pack ever. Worth the cost. Read more

From the brand Previous page Shop Jump Starters Visit the Store Shop Battery Chargers Visit the Store Shop Lithium Batteries Visit the Store Shop Accessories Visit the Store Established in 1914, NOCO designs and creates premium consumer battery chargers, jump starters, lithium batteries, and a wide range of accessories. Through these world-class offerings, we have effectively set a new standard in design, performance, and safety. We aim to make exceptional products that provide consumers with the ultimate experience. We challenge conventionality and remain vigilant to the highest quality standards. We are NOCO. Next page