GB500 Support
GB500
Support.
USER GUIDE
DATASHEET
VIDEOS
How to Jump Start using NOCO GB500+
Learn how to jump start using your NOCO Boost Max GB500+ UltraSafe Lithium Jump Starter in three simple steps.
How to Recharge NOCO GB500+
The NOCO Boost Max GB500+ is a portable lithium-ion 12V & 24V battery jump starter booster pack that delivers 6,250-amps for jump starting a cars, boats, trucks and more.
How to use Manual Override with NOCO GB500+
Learn how to use manual override on your NOCO Boost Max GB500+ UltraSafe Lithium Jump Starter to begin jump starting a dead battery below 2-volts.
How to Use 12V Out with NOCO GB500+
Learn how to use 12V Out on your NOCO Boost Max GB251+ UltraSafe Lithium Jump Starter to power a multitude of devices.
How to Charge a Phone using NOCO GB500+
Learn how to charge a phone or other USB devices using NOCO Boost Max GB500+.
GB500+
HOW TO JUMP START.
ATTACH CLAMPS.
POWER ON.
START VEHICLE.
Within 60 seconds.
Power off.
Or power off/on to reset.
FAQ
Boost Max
Choosing Boost MAX
Which Boost should I get for my vehicle?

Boost models are based on the vehicle engine size. Look up the engine size of the vehicle to find the Boost model that best fits your needs.

Boost Gasoline Engine Diesel Engine
GB20 Up to 4.0L   Learn more.
GB40 Up to 6.0L Up to 3.0L Learn more.
GB50 Up to 7.0L Up to 4.5L Learn more.
GB70 Up to 8.0L Up to 6.0L Learn more.
GB150 Up to 9.0L Up to 7.0L Learn more.

 

Boost X Gasoline Engine Diesel Engine
GBX45 Up to 6.5L Up to 4.0L Learn more.
GBX55 Up to 7.5L Up to 5.0L Learn more.
GBX75 Up to 8.5L Up to 6.0L Learn more.
GBX155 Up to 10.0L Up to 8.0L Learn more.

 

Boost Max Gasoline Engine Diesel Engine
GB250 12V Up to 16.0L Up to 16.0L Learn more.
GB251 24V Up to 32.0L Up to 32.0L Learn more.
GB500 12V & 24V Up to 45.0L Up to 45.0L Learn more.
What types of batteries can Boost Max jump?

NOCO Boost Max can only jump start lead acid batteries. This includes wet, gel, maintenance free, enhanced flooded battery, and absorbent glass mat batteries.

GB250 12-Volt lead-acid battery systems.
GB251 24-Volt lead-acid battery systems.
GB500 12-Volt and 24-Volt lead-acid battery systems.
Can I use Boost Max on my hybrid vehicle?

Boost jump starters are compatible with the starting-battery in hybrid vehicles as long as the starting-battery in question is a 12V Lead-Acid battery. These include Wet-Cell, Gel-Cell, AGM, AGM , Maintenance Free, and EFB batteries. Boost will also work with Calcium-Calcium and Calcium-Lead batteries. As long as the unit is used on a 12V ignition system for a gas or diesel engine and on one of the aforementioned battery types, it will work.

Can Boost Max jump start a car from the 12V plug?

No. The 12V ports in a car are current limited at 8 Amps. Boost Max delivers a maximum range of 3,000A to 6,250A, depending on your model, which would cause severe damage to the port. Plugging the 12V XGC Cable into the vehicle's 12V plug will not jump start the vehicle.

Can Boost Max jump start a 6V vehicle?

No. Boost Max is only designed for 12V or 24V vehicles. Jump starting a 6V battery could become extremely dangerous.

Can Boost Max jump start a lithium battery?

No. Lithium batteries are sensitive to how current is applied to the battery. Jump starting a lithium battery could become extremely dangerous.

Can Boost Max jump start a motorcycle?

Yes, as long as the battery in the motorcycle is a 12V Lead Acid battery you can use GB250 or GB500 to jump start it.

Can Boost Max jump start a motorcycle using an SAE harness?

No. There isn't a direct Boost-to-SAE adapter since the SAE cable isn't rated for the output of the Boost.

Can Boost Max charge my car's battery?

No. While Boost Max can jump start your car battery it is not a battery charger. If you need to charge your car battery we recommend using NOCO Genius for charging and maintaining 6V or 12V batteries lead acid, AGM or Lithium batteries.


Click here to learn more about NOCO Genius Smart Battery Chargers.

Can Boost Max power other 12v DC devices, like an air compressor?

Yes. All Boost Max models have a 12V Out port that can power 12V accessories, such as air compressors.

What devices can Boost Max recharge?

Boost Max can recharge any device that uses USB. This includes all generations of smartphones on the market, as well as HD action cameras, tablets, music players, headphones, earbuds, wireless speakers and more.

Can Boost Max recharge my smartphone and other USB devices?

Yes. Boost Max can recharge any device that uses USB charging.

Features & Specs
What is the starting current on Boost Max?
GB250 5,250 Amps (Peak)
GB251 3,000 Amps (Peak)
GB500 6,250 Amps (Peak)
Is Boost Max waterproof?

NOCO Boost models carry a rating of IP65 with the port covers closed, which means they can be exposed to water without any issues, however, they cannot be submerged in water.

 
What is the countdown timer on Boost Max?

You will need to start the vehicle before the time runs out. It is designed to conserve the power of the internal battery because this model is capable of unloading more power than previous models.

 
What are the operating temperatures for Boost Max?

NOCO Boost can operate within the temperature range -4ºF to 122ºF (-20ºC to 50ºC). Boost is equipped with thermal sensors that will prevent it from operating outside of this temperature range for your own safety.

How long does Boost Max hold a charge?

All Boost Max models can hold 70% of its rated capacity for up to one year. For optimal performance, we recommend charging the device at least every 4-6 months, after initial charge.

What is the internal battery capacity of Boost Max?
GB250 242 Watt-Hour Lithium-Ion
GB251 137 Watt-Hour Lithium-Ion
GB500 266 Watt-Hour Lithium-Ion
What is the USB port ratings on Boost Max?

Boost Max has two USB out ports both rated at 5V, 2.1 Amps.

Is Boost Max compatible with 220V outlets?

Yes. Boost Max is recharged by provided 56-Watt XGC Adapter, which comes with power connections for Type G (UK), Type I (AU), Type C (EU) and Type A (NA) plugs.

How heavy is Boost Max?
GB250 14.7 lbs (6.67 kg)
GB251 13.6 lbs (6.17 kg)
GB500 19.25 lbs (8.73 kg)
Does Boost Max come with a carrying case?

Yes. All Boost Max units come packaged with a carrying case for that unit. At this time we do not sell replacement carrying case.

Is Boost Max made in the USA?

NOCO Boost Max Jump Starters are designed in the United States and manufactured in various countries around the world.

Usage & Care
Should I charge Boost Max before using it?

Yes. Boost Max will arrive partially charged. Fully charge the unit before first using it to ensure optimal performance.

How long does Boost Max take to recharge?

NOCO Boost Max is equiped with a 12V XGC charging port. Connect Boost Max using the included 12V DC car charger or XGC4 wall charger to the 12V IN port.

GB250 56W Charging
8.5 hours
How to Recharge GB250 .
GB251 56W Charging
8.5 hours
How to Recharge GB251 .
GB500 56W AC Charging
6-8 hours
How to Recharge GB500 .
What if the clamps touch?

Nothing, it is perfectly safe. Boost Air has built-in spark-proof sensors that prevent power from being delivered unless a battery is detected or the device is in Manual Override Mode.

 

When in Manual Override Mode: Do not allow the positive and negative battery clamps to touch or connect to each other, refer to the user guide for more information.

Can the clamps be connected to the battery backwards?

The error LED will illuminate, but it is perfectly safe and there won't be any sparks. With Reverse Polarity Protection, Boost will not deliver power unless Boost is connected to the battery correctly.

What if Boost Max isn't detecting my car's battery?

If Boost Max is not detecting the battery it is possible the voltage is too low to detect. Boost Max is designed to jump start 12-volt lead-acid batteries down to 2-volts. If your battery is below 2-volts, the Boost LED will be "Off". This is an indication that Boost Max can not detect a battery. If you need to jump start a battery below 2-volts there is a Manual Override feature, which allows you to force "On" the jump start function.

 

Can Boost Max be left in direct sunlight in a car?

No. Remove Boost Max from direct sunlight. The ambient temperature in car can increase up to 50ºC (122ºF) within 10 minutes.

What is the optimal storage temperature for Boost Max?

NOCO Boost Max should not be stored below -4ºF (-20ºC), and not exceed 122ºF (50ºC) for any reason. Storing Boost Max outside of these ranges can cause damage to multiple crucial components of the jump starter. This applies to all Boost models.

Can I recharge Boost Max in extreme heat?

NOCO Boost Max should not be stored below -4ºF (-20ºC), and not exceed 122ºF (50ºC) for any reason. Storing Boost Max outside of these ranges can cause damage to multiple crucial components of the jump starter. This applies to all Boost models.

Is it possible to accidentally overcharge Boost Max?

Boost Max jump starters have built-in overcharge protection and can be left on a charger at all times.

Can the battery inside Boost Max be replaced?

No. We do not replace the batteries or repair the units, but replace the whole unit if it tests faulty.

Warranty & Support
How long is the warranty on Boost Max?

NOCO Boost Max has a one-year limited warranty. Visit our Boost Max Warranty Page to learn more about Warranty or find the User Guide to your specific Boost Max model.

Where can I obtain the user manual for Boost Max?
GB250 User Guide
GB251 User Guide
GB500 User Guide
I lost my charging adapter. Where can I get a replacement?

Boost Max recharges using the 56W XGC Power Adapter. 

Does NOCO sell replacement clamps or longer clamp cables?

Boost Max GB500 has removable clamps that can be replaced. NOCO also sells a longer 72-inch (182 CM) version of the clamp cables. 

Can I take Boost Max on an airplane?

No. FAA Guidlines limit lithium batteries larger than 100Wh, all Boost Max models exceed this limitation. No-Lithium batteries are allowed to be checked in luggage.

My Boost Max has reached its End of Life. Where can I safely dispose of it?

We always recommend checking in with your local laws, and regulations for proper disposal of your Lithium battery products, like the Boost. If you live in the USA or Canada, you can follow this link to see where to drop off the Lithium product for recycling in your area:

 

https://www.call2recycle.org/
LEDs
GB500+
Power LED
Illuminates White when unit is "on".
Voltage Indicator
12V illuminates White when in 12V mode, 24V illuminates Blue when in 24V mode.
Error LED
Illuminates Red if reverse polarity is detected.
Hot / Cold LED
Illuminates solid or flashes Blue when internal temperature is too low. Illuminates solid or flashes Red when internal temperature is too high.
Charge LEDs
Indicates the charge level of the internal battery.
Boost LED
Illuminates White when Boost is active. LED flashes White when Manual Override feature is active.
Manual Override LED
Illuminates solid Red when Manual Override is activated.
USB Out & 12V In/Out
Illuminates White; USB Out can be used in 12V and 24V modes. 12V In/Out function can only be used in 12V mode.
Buttons
GB500+
Power Button
Push to turn unit "on" and "off".
Manual Override
To enable, push and hold for three (3) seconds. WARNING: Disables safety protection and manually forces Boost "On". Only for use when a battery is too low to be detected.
Light Mode
Toggles the ultra-bright LED light through 7 light modes: 100% > 50% > 10% > SOS > Blink > Strobe > Off
60 Second Timer
Voltmeter will display timer. After 60-seconds, remove the clamps from the Car Battery or power the unit 'off' and back 'on' again to jump start.
Voltmeter
The built-in voltmeter reads the voltage of the vehicle’s battery for enhanced diagnostics and troubleshooting. It will display the 60-second timeout countdown.
BOOST MAX.
WARRANTY.
All NOCO Boost Max Jump Starters come with a limited warranty. Register your product after purchasing to qualify for the applicable warranty.
REGISTER PRODUCT
VIEW WARRANTY
GB500+
Troubleshooting
Error
Reason/Solution
Solid Red
Reverse polarity detected. / Reverse the battery connections.
Single (1) Flash
Short Circuit detected on battery clamps. / Remove all loads, reconnect clamps to battery.
Triple (3) Flash
Internal master switch failure. / Ensure the voltage selection knob is correctly positioned in the 12V or 24V position.
Quadruple (4) Flash
Bad battery cell detected during charge. / Power off unit, contact NOCO support.
Quintuple (5) Flash
XGC OUT overcurrent error. / Remove load from XGC OUT, then Power “Off” the unit then power “On”.
GB500+
COMPATIBLE ACCESSORIES.
The following accessories are compatible with the selected product.
VIEW ALL ACCESSORIES

GBC004

GBC004

MSRP: $284.95 You save 21%

$224.95

Add to Cart

GBC005

GBC005

MSRP: $564.95 You save 20%

$449.95

Add to Cart

XGC4

XGC4

MSRP: $75.95 You save 21%

$59.95

Add to Cart

GBC016

GBC016

MSRP: $282.95 You save 20%

$224.95

Add to Cart