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NOCO

NOCO Boost Max GB250: 5250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 16L Gas and Diesel Engines

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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Sep 2
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Features

  • 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.
  • WHATS 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.

Description

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 Despite its immense power, the GB250 weighs just 15 pounds, replacing bulky, outdated alternatives with a compact, portable design that fits in its custom EVA protective case.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, and a Max Protection EVA Case. Backed by a 1-year limited warranty and engineered in the USA, the GB250 is the ultimate professional-grade solution when failure is not an option.

Brand: NOCO


Product Dimensions: 19.49"D x 14.17"W x 9.8"H


Item Weight: 21.6 Pounds


Amperage: 5250 Amps


Peak Output Current: 5250 Amps


Brand: ‎NOCO


Product Dimensions: ‎19.49"D x 14.17"W x 9.8"H


Item Weight: ‎21.6 Pounds


Amperage: ‎5250 Amps


Peak Output Current: ‎5250 Amps


Specification Met: ‎UL


Manufacturer: ‎NOCO


UPC: ‎046221190403


Global Trade Identification Number: ‎03


OEM Part Number: ‎GB250


Automotive Fit Type: ‎Universal Fit


Model: ‎GB250


Item Weight: ‎21.6 pounds


Item model number: ‎GB250


Batteries: ‎1 Lithium Ion batteries required.


Exterior: ‎Machined


Manufacturer Part Number: ‎GB250


Bulb Type: ‎LED


Special Features: ‎5,250A 12V Commercial Jump Starter, Lithium Powered Jump Starter, Spark-Proof and Reverse Polarity Protection, Works On Gas and Diesel Engines


Date First Available: January 27, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Amazing and so handy. All the power u need.
This unit is amazing. My farmer bub borrowed it to start his big Quad sitting in the cold storage this spring. Battery was weak. He connected my power pack and tractor spun over like summer and started. He's going to get a unit like mine. He's a believer like I am.
Reviewed in the United States on June 10, 2025 by geno
    • Very powerful.
Expensive, but well worth it and will start any diesel engine. That’s completely dead. And do a multiple times without recharging. Hoping that it will last a long time. Will do an update in a year to see how it holds up.
Reviewed in the United States on February 28, 2025 by vadim kasko
    • Excellent Jump Pack! Crappy buckles
Review Image by Cameron Cameron
Review Image by Cameron Cameron
Review Image by Cameron Cameron
Review Image by Cameron Cameron
I own a diesel repair shop, and do everything from diesel pickups, semis, tractors, etc. I didn't figure I would use this a lot, but ever since I bought it, I find myself finding a use for it all the time! Very convenient! I have jump started 4 (8-12L) Semis that were completely dead, and cranked for 30 seconds or more each, on 1/2 a charge with this before. My only gripe is the case. Which is beautifully constructed, save for the pull tabs on the zippers, and the buckles. Absolute garbage, they broke in about a week of mild use. So, I replaced the pull tabs, as shown. And installed some field repair buckles to replace the cracked originals, as shown. I don't know why they would cut corners there, when everything else is a beautiful package. But, it's fixed now, you can find both of those products on Amazon as well for cheap. Also, be advised. This comes with the quick charge cable, you do not need to buy it separately! ... show more
Reviewed in the United States on January 13, 2023 by Cameron Cameron
    • Fantastic customer service
I’ve had this for almost a year now and it starts everything I’ve got semi‘s tractors bulldozer doesn’t matter. The only issue I had was the zippers on the case they both broke. I alerted Noko to it and they sent me a brand new case free of charge last week. Awesome customer service. .!!
Reviewed in the United States on August 6, 2025 by Gus
    • The beast
Works well, even on heavy equipment.
Reviewed in the United States on May 5, 2025 by J'wan Torness
    • Great Charger
these chargers are worth the money. this is our 3rd one and they just work.
Reviewed in the United States on June 2, 2025 by Greg Maendel
    • Beware this is a big scam
I bough this cuz I boost cars all the time and I want something secure and reliable cuz I’m on the move all the time and let me tell you this , a 300 dollar booster would do better job then this thing first of all you have to wait 60 seconds to just use it and then once you able to use it the power that it gives it like a cheap booster there’s no way this thing would work or some big trucks with a totally dead battery , I tried it on two different cars with a fully charged booster and barely start the cars and then on the third try I try to start a dead battery on a 2002 vw Passat and guess what , it couldn’t even start the car at all like a 1000 dollars device with so many features couldn’t even start 3 cars with one charging then this thing it’s useless and I mean useless bro don’t even waste your money with this thing get a 300 dollars booster from auto zone it’s gonna work way better then this thing plus it’s really pricey I mean the only explanation I have for this issue it’s that I got q bad unit so I contact customer service and they can return my money but they cannot replace my unit so how would I know if I just got a bad unit or if this thing it’s really cheap ... show more
Reviewed in the United States on July 28, 2022 by LEO
    • truck charger
great purchase jump started our company 5500 that had not been on in months in minutes
Reviewed in the United States on April 17, 2025 by Juan Gutierrez

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