Frequently Asked Questions

Frequently Asked Questions

NOCO Boost X


GBX45 User guide
GBX55 User guide
GBX75 User guide
GBX155 User guide


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.

GBX45 1,250 Amps (Peak)
GBX55 1,750 Amps (Peak)
GBX75 2,500 Amps (Peak)
GBX155 4,250 Amps (Peak)


GBX45 31 Watt-Hour Lithium-Ion
GBX55 46 Watt-Hour Lithium-Ion
GBX75 74 Watt-Hour Lithium-Ion
GBX155 99 Watt-Hour Lithium-Ion


GBX45 100 lumen LED flashlight.
GBX55 200 lumen LED flashlight.
GBX75 400 lumen LED flashlight.
GBX155 500 lumen LED flashlight.

Click here to learn more about the LED Flashlight Modes on Boost X.


Nothing, it is perfectly safe. Boost X has built in sensors that prevent power from being delivered, unless a battery is detected.


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


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


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


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


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


No. Boost X should be recharged in temperatures between 32ºF to 104ºF (0ºC to 40ºC). Remove from heat source and allow the battery to cool down before recharging.


The USB-C IN/OUT port utilizes Power Delivery 3.0 technology capable of receiving/delivering up to 60W. The time to recharge a GBX45 will differ based on the discharge level and the power source used. Actual results may vary due to battery conditions.

Boost X is equipped with Fast Charge technology that allows it to be recharged at a rate of up to 60W. A compatible charger, capable of 60W USB-C Power Delivery 3.0, is required to fully utilize this feature. The Fast Charge LED will illuminate when rate of charge exceeds 15W, indicating USB Power Delivery 3.0 is active.

GBX45 USB-C Charging
16 hours at 2.5W
8 hours at 5W
4 hours at 10W

Fast Charge
0.8 hours at 60W
How to Recharge GBX45.



How to Fast Charge Boost X.
GBX55 USB-C Charging
28 hours at 2.5W
14 hours at 5W
7.2 hours at 10W

Fast Charge
1.2 hours at 60W
How to Recharge GBX55.



How to Fast Charge Boost X.
GBX75 USB-C Charging
20 hours at 5W

Fast Charge
1.7 hours at 60W
How to Recharge GBX75.


How to Fast Charge Boost X.
GBX155 USB-C Charging
64 hours at 2.5W
32 hours at 5W
16 hours at 10W

Fast Charge
2.7 hours at 60W
How to Recharge GBX155.



How to Fast Charge Boost X.


All Boost X 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.


Yes. Boost X is USB-C rechargeable, so it’s not directly tied to the electrical service of your country (i.e. 120V or 220V). Use an AC to USB-C adapter or 12V to USB-C adapter to charge your device. A 12V USB-C Car Charger will work in any country or vehicle with a 12V port.


USB-A 5VDC 2.1A Max / 10W Max
USB-C 5V 3A/9V 3A/12V 3A/15V 3A/20V 3A


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

Click here to learn more about charging USB devices using NOCO Boost X.


Yes. Boost X can recharge any device that uses USB or USB-C charging.


Click here to learn more about charging USB devices using NOCO Boost.


The provided USB-C cable is 24" (61 cm) in length. Boost charges with a standard USB-C port, so if a longer or short cable is prefered then the provided cable can be replaced with any compatible USB-C cable.


NOCO Boost X can only jump start 12V lead acid batteries. This includes wet, gel, maintenance free, enhanced flooded battery, and absorbent glass mat batteries.

Check out NOCO Boost Max to learn more about jump starting 24V batteries.


GBX45 For gasoline engines up to 6.5L and diesel engines up to 4L. How to Jump Start using GBX45
GBX55 For gasoline engines up to 7.5L and diesel engines up to 5L. How to Jump Start using GBX55
GBX75 For gasoline engines up to 8.5L and diesel engines up to 6L. How to Jump Start using GBX75
GBX155 For gasoline engines up to 10L and diesel engines up to 8L. How to Jump Start using GBX155


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.


Yes. Boost X can jump start any vehicle with a 12V lead acid battery like a car, boat, motorcycle, ATV, lawn mower, RV, tractor, truck and more.


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


No. The 12V ports in a car are current limited at 8 Amps. Boost X delivers a maximum range of 1,000A to 4,250A, depending on your model, which would cause severe damage to the port. However, there is no way to connect this product to the 12V port, so there is no risk of this happening.


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


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


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


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


No. While Boost X 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.


If Boost X is not detecting the battery it is possible the voltage is too low to detect. Boost X 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 X 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.

GBX45 How to use Manual Override.
GBX55 How to use Manual Override.
GBX75 How to use Manual Override.
GBX155 How to use Manual Override.


GBX45 2.16lbs (0.98kg)
GBX55 2.58lbs (1.17kg)
GBX75 3.77lbs (1.71kg)
GBX155 5.82lbs (2.64kg)


Yes. All Boost X models are FAA compliant and can be taken on a plane, however they have to be in your carry-on. No-Lithium batteries are allowed to be checked in luggage. All Boost X models are under 100Wh which is the limit set by the FAA. For more additional information, or for current updates, please see the link below to the FAA guidelines. We also recommend contacting the airlines you are flying to see if they have any additional restrictions.


Yes, as long as the battery is a 12V Lead Acid battery.


There isn't a direct Boost-to-SAE adapter since the SAE cable isn't rated for the output of the Boost. You can install the GBC007 eyelet cable alongside the SAE cable you have on your battery, then plug the GBX45 directly into the GBC007 when jump-starting. GBC007 has an included X-Connect adapter which can be plugged into the cable and plug a compatible NOCO Genius Battery Charger into the adapter for charging and maintenance.


Boost X comes with a provided microfiber storage bag. NOCO makes EVA Protective Cases for each model of Boost X, all are sold separetly.
Use this chart to find the matching EVA Protective Case for each Boost X model:

GBX45 GBC101
GBX55 GBC102
GBX75 GBC103
GBX155 GBC104

Click here to find more NOCO Boost X Accessories.


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


No. Boost X does not have a 12V output connection. Boost X can only power USB and USB-C powered devices.


For vehicles with dual battery configurations, connect both the positive and negative clamps of Boost X to the battery closest to the starter.

  • If your batteries are in parallel, you can use two Boost units to double the starting power if needed.
  • If your batteries are in series, you cannot use any 12V Boost. A 24V jump starter would be required.

Check out NOCO Boost Max to learn more about jump starting 24V batteries.


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


NOCO does not individually sell the USB-C charging cable like the one provided with the unit. Boost X can be charged using any standard USB-C cable like the ones many smartphones and tablets use.

NOCO does sell USB-C Fast Charge accessories that could replace the USB-C cable. Learn about Fast Charge.

U65 65W USB-C Charger
GBC011 65W GBX 12V Car Charger

Click here to find more NOCO Boost X Accessories.


Unfortunately, there are no extension cables available for the clamps on Boost products as extending the cables would reduce the starting power they produce. If your positive and negative posts are too far away from each other, you can also connect to a negative ground on the vehicle chassis rather than the negative post.


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:

http://www.call2recycle.org/








Chat Monday through Friday
8 AM to 7 PM EDT
5 AM to 4 PM PDT
Average Response Within 1
Business Day
Request A Callback

Request A Callback

It's OK to respond via email for a faster response.

Click for emergency contact information.

Emergency Contact Information

1.800.456.6626 Monday through Friday
8 AM to 7 PM EDT
5 AM to 4 PM PDT
For non-urgent support, please Request A Callback
For Fastest Response, Use 'Chat' or 'Send a Message' Above
Write Us

The NOCO Company 30339 Diamond Parkway #102 Glenwillow, OH 44139-5400 United States of America

Request A Callback

Request A Callback

It's OK to respond via email for a faster response.

Click for emergency contact information.

Emergency Contact Information

1.800.456.6626 8AM-5PM (MST)
Monday-Friday
For non-urgent support, please Request A Callback
For Fastest Response, Use 'Chat' or 'Send a Message' Above