noco BOOST max gb251

5250 Peak Amps jump starter for your class 8 semi truck

The Noco Boost MAX GB251 is a powerful jump starter that commercial fleet owners love because of its reliability and the amazing value it provides at a very reasonable price. Find all you need to know about it here.

24V/3000 Amps Peak

32L Gas/Diesel engines

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30-Day Return Guarantee

12 months free warranty

Technical Specifications

  • 4250 Amp (peak current)
  • 12 Volts
  • Works with up to 16L Gas and Diesel engines
  • Operating temperature: -4°F to +122°F (-20°C to +50°C)
  • USB-A Out: 5V, 2.1A Max Each
  • 12V Cigarette adapter DC Port
  • Charge time for 1 jump start: 5 minutes
  • Fast charging time: 8.5 hrs to full charge
  • High Temperature Error LED
  • Low Temperature Error LED
  • Error LED
  • 600 Lumen LED flashlight
  • 15.04 (length) x 8.62 (width) x 3.7 (height) inches
  • 13.6 lbs (6.17kg)
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
  • The Boost Max Series – Introducing our most powerful lithium jump starters yet. Designed for the largest, most challenging engine starts ever. With…
  • UltraSafe – Safe and easy to use battery jump starter pack without the worry of incorrect connections or sparks. Safely connect to any 24-volt battery…

The noco gb251 jump starter compared vs similar items

Image
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
AVAPOW 6000A Car Battery Jump Starter(for All Gas or up to 12L Diesel) Powerful Car Jump Starter with Dual USB Quick Charge and DC Output,12V Jump Pack with Built-in LED Bright Light
Item
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
AVAPOW 6000A Car Battery Jump Starter(for All Gas or up to 12L Diesel) Powerful Car Jump Starter with Dual USB Quick Charge and DC Output,12V Jump Pack with Built-in LED Bright Light
Model
NOCO Boost Max GB251
ZunDian ZD-974
Peak Current
24V/3000 Amps
12V/24V – 2500 Amps
Engine Size it can start
32L Gas/Diesel
13L Gas/Diesel
Time for 1 jump start
5 min
Not Specified
Time from 0 to 100% charge
8.5hrs with 56W Charger
Not Specified
USB A
OUT: 5V, 2.1A Max Each
Yes but not specified
USB C
No.
No.
12V Power Port
Operating Ambient Temperature
-4°F to +122°F (-20°C to +50°C)
14℉ to 104℉
Water and Dust Resistant
Force Start
LED Flashlight
600 Lumen
Yes but no Lumens specified
Dimensions
15.04 x 8.62 x 3.7 inches
9.9 x 7 x 11.2 inches
Weight
13.6 lbs (6.17kg)
31.7 lbs
Spark Proof Protection
Reverse Polarity Protection
Price
$1,199.95
$169.99
Image
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
Item
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
Model
NOCO Boost Max GB251
Peak Current
24V/3000 Amps
Engine Size it can start
32L Gas/Diesel
Time for 1 jump start
5 min
Time from 0 to 100% charge
8.5hrs with 56W Charger
USB A
OUT: 5V, 2.1A Max Each
USB C
No.
12V Power Port
Operating Ambient Temperature
-4°F to +122°F (-20°C to +50°C)
Water and Dust Resistant
Force Start
LED Flashlight
600 Lumen
Dimensions
15.04 x 8.62 x 3.7 inches
Weight
13.6 lbs (6.17kg)
Spark Proof Protection
Reverse Polarity Protection
Price
$1,199.95
Image
AVAPOW 6000A Car Battery Jump Starter(for All Gas or up to 12L Diesel) Powerful Car Jump Starter with Dual USB Quick Charge and DC Output,12V Jump Pack with Built-in LED Bright Light
Item
AVAPOW 6000A Car Battery Jump Starter(for All Gas or up to 12L Diesel) Powerful Car Jump Starter with Dual USB Quick Charge and DC Output,12V Jump Pack with Built-in LED Bright Light
Model
ZunDian ZD-974
Peak Current
12V/24V – 2500 Amps
Engine Size it can start
13L Gas/Diesel
Time for 1 jump start
Not Specified
Time from 0 to 100% charge
Not Specified
USB A
Yes but not specified
USB C
No.
12V Power Port
Operating Ambient Temperature
14℉ to 104℉
Water and Dust Resistant
Force Start
LED Flashlight
Yes but no Lumens specified
Dimensions
9.9 x 7 x 11.2 inches
Weight
31.7 lbs
Spark Proof Protection
Reverse Polarity Protection
Price
$169.99

The GB251 compared with other noco boosters

Image
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
NOCO Boost Max GB250 5250 Amp 12-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 16-Liters
NOCO Boost Max GB500 6250 Amp 12-Volt and 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 45-Liters
Model
GB251+
GB250+
GB500+
Voltage & Peak Amps
24V – 3000A
12V – 5250A
12V/24V – 6250A
Engines size it can start
Up to 32.0L Gas & Diesel Engines
Up to 16.0L Gas & Diesel Engines
Up to 45.0L Gas & Diesel Engines
Flashlight
💡 600 Lumen Flashlight
💡 600 Lumen Flashlight
💡 2200 Lumen Flashlight
Built-in Voltmeter
USB Ports
2x USB-A Out
2x USB-A Out
2x USB-A Out
Protections
Spark Proof & Reverse Polarity Protection
Spark Proof & Reverse Polarity Protection
Spark Proof & Reverse Polarity Protection
Error LED
Hot/Cold internal temperature LED indicator
Auto power conservation mode
Price
$1,199.95
$1,199.95
Price not available
Image
NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
Model
GB251+
Voltage & Peak Amps
24V – 3000A
Engines size it can start
Up to 32.0L Gas & Diesel Engines
Flashlight
💡 600 Lumen Flashlight
Built-in Voltmeter
USB Ports
2x USB-A Out
Protections
Spark Proof & Reverse Polarity Protection
Error LED
Hot/Cold internal temperature LED indicator
Auto power conservation mode
Price
$1,199.95
Image
NOCO Boost Max GB250 5250 Amp 12-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 16-Liters
Model
GB250+
Voltage & Peak Amps
12V – 5250A
Engines size it can start
Up to 16.0L Gas & Diesel Engines
Flashlight
💡 600 Lumen Flashlight
Built-in Voltmeter
USB Ports
2x USB-A Out
Protections
Spark Proof & Reverse Polarity Protection
Error LED
Hot/Cold internal temperature LED indicator
Auto power conservation mode
Price
$1,199.95
Image
NOCO Boost Max GB500 6250 Amp 12-Volt and 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 45-Liters
Model
GB500+
Voltage & Peak Amps
12V/24V – 6250A
Engines size it can start
Up to 45.0L Gas & Diesel Engines
Flashlight
💡 2200 Lumen Flashlight
Built-in Voltmeter
USB Ports
2x USB-A Out
Protections
Spark Proof & Reverse Polarity Protection
Error LED
Hot/Cold internal temperature LED indicator
Auto power conservation mode
Price
Price not available

What’s in The Package?

What is inside the box of the NOCO Boost Plus GB251.
  • NOCO Boost Max GB251+ Jump starter
  • 56W Power Adapter with interchangeable 60-inch (1. 5m) AC Cords for Australia (Type I), Europe (Type C), North America (Type A), and the United Kingdom (Type G)
  • XGC Kit
  • Max Protection EVA Carrying Case
  • User Manual

ADVANTAGES of the noco BOOST max gb251

This investment gives you peace of mind: It is hard to describe the feeling when you discover your car’s battery is dead, yet most people can relate to it. Having the GB251+ on your side will save you from feeling that again.

You receive more than what you give: While the price may seem high at first, you have to consider this is a one time investment. On the other hand, if you add all the delays, the plans ruined, the frustration and the monetary costs of all of this and compare it with the price of this booster, then you are in front of a true bargain.

24V and 3000 Amps: This jump starter is designed for 24V commercial vehicles like buses, mining, construction, and all gas and diesel engines of up to 32L in size.

Effective Force Start Function: If a battery is heavily discharged the the jump starters won’t detect it and you won’t be able to start your car. The manual override function allows you to force power to the battery and jump start the engine.

Power Bank for your Electronics: The GB251 also powers your phone, tablet, cameras, earbuds and other small electronics.

2x USB A Ports: Use these ports to charge your electronic gadets.

12V Cigarette adapter: You can charge your GB251 at the same time you drive. Thus you can be sure its ready in case you need it.

5 min = 1 jumpstart: Other jump starters need 50% to 80% of its battery for jumpstarting your car. The GB251 just needs 5 minutes and it will give you at least 1 effective jump start.

Quick Charge: The GB251+ Noco fully charges in 8.5 hours when the battery is empty. Also, this is possible thanks to the included XGC power adapter.

No Sparks protection safety feature: People are afraid to jump start a car because sparks are always a possibility. With the Ultra Safe technology of the Noco GB251 this is no longer the case. And yes, even if clamps touch each other.

No damage to your car due to a reversed connection: Another reason why people don’t like to jump start a car with jumper cables is because it these are connected in the wrong order, the car’s electronics could get damaged. The GB 251 is designed to not work if the connection is reversed.

Temperature protection for the internal battery: Lithium batteries like the one the GB251 has must operate in a specific range of temperature or they could get damaged. This booster will warn you if the temperature of the battery is not right to help you protect your investment.

Power management: In order to avoid depleting the battery if the booster is stored turned on, the auto power conservation function shuts down the jump starter so the battery keeps its charge and is ready when you need it.

Engineered with Lithium battery: This is what allows boosters like this one to be so small, portable, and powerful, compared to jump starters that use lead-acid batteries.

600 Lumen lamp: If the situation requires it, the LED lamp of this booster pack will illuminate your way to help you see in the dark.

COMMENTS and reviews from current customers

The amount of power this jump starter is able to generate is amazing, and that is why people brag about what their GB251 is able to do. Here are some of those comments from current owners.

NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
  • The Boost Max Series – Introducing our most powerful lithium jump starters yet. Designed for the largest, most challenging engine starts ever. With…
  • UltraSafe – Safe and easy to use battery jump starter pack without the worry of incorrect connections or sparks. Safely connect to any 24-volt battery…

😀

It’s been a rough winter in North Dakota. Freezing temperatures left our truck batteries not wanting to hold a charge. This is heaven sent! No more waiting all day to jump them off of our …

😡

1000 dollars for this and never got to use it and when I needed it to work nope had to use the old dodge not very happy with it…

😀

HOW TO USE THE gb251 noco

The noco boost GB 251 is easy to use

The usage of this booster is pretty simple, yet here are a few notes I think you may appreciate.

  • The connection to the battery must be right, that is, red clamp to positive and black clamp to negative.
  • Power On the booster and if all is good the charge LEDs will chase and the BOOST LED will lit.
  • Start the engine.

Now… just in case things are going on a bit different for you, here is what you need to do.

AN LED IS A ON OR BLINKING – WHAT SHOULD I DO?

Noco Boost Max GB251+ LEDs

The image above gives you a good idea of what each LED is for and the potential errors these may point to. My recommendation is to read the manual or the specification sheet listed below in this post to understand what the issue is.

However, the most common problem is a reverse polarity issue, which means you just need to connect the clamps in the right order.

But… what if no error led is either solid or blinking and still nothing happens?

Then you need to use the force start function to help you boost the battery. Here a few thoughts about it.

  1. A quick way to confirm this if to check if the voltmeter reads less than 2V when connected to the battery. If so, this is a clear indication the battery is flat dead.
    • Sometimes even a little under of 10V the battery is not detected by the jump starter, so the manual override is still required.
  2. The manual override function will disable all safety features, so if clamps touch each other there will be some sparks.
  3. Make sure the clamps are attached to the right terminal.
  4. Press and hold the manual override button for about 3 seconds and wait for the chasing pattern in the charge LEDs. The BOOST LED will blink on and off indicating force start function is active.
  5. Start the engine.
  6. After this, turn off the booster and disconnect the clamps.

The operation of this booster is extremely easy and intuitive, yet here are some videos in case you want to see a little demonstration of it.

How to jump start your car with the GB251+
How to use the GB251 Manual Override
The NOCO Boost GB251

User Manual and Specification Sheet

What You Need to Know Before Buying the GB40 jump starter

No type-C USB port: Other models from Noco and other brands come with a USB-C port but not the GB251+.

gET THE GB251+ today

NOCO Boost Max GB251 3000 Amp 24-Volt UltraSafe Portable Lithium Jump Starter Box, Battery Booster Pack, and Commercial Jumper Cables for Gasoline and Diesel Engines Up to 32-Liters
  • The Boost Max Series – Introducing our most powerful lithium jump starters yet. Designed for the largest, most challenging engine starts ever. With…
  • UltraSafe – Safe and easy to use battery jump starter pack without the worry of incorrect connections or sparks. Safely connect to any 24-volt battery…

FAqS

What is the best model for my semi truck, 250 or 251?

It depends on the battery voltage of your semi truck. 250 model is for 12V batteries and 251 is for 24V batteries.

is this good for my semi truck even if it has several batteries?

Yes. As long as it is 24V, the GB251 is the model you need. If your semi truck is 12V, then use the GB250.

Noco Boost Max GB251

NOCO Boost MAX GB251 | 24V/3000A | 32L Gas & Diesel Engines | ✅ Trusty | Ultra Safe | Smart Investment | Comparison Table vs similar items.

Product Brand: NOCO Boost

Product Currency: USD

Product Price: 1008.83

Product In-Stock: InStock

Editor's Rating:
5

Pros

  • 24V & 3000 Peak Amps
  • Tremendous Cost-Benefit
  • Force Start Function
  • Fast Charge
  • Spark Proof

Cons

  • No USB-C Port