
NOCO Boost Plus GB40 Manual PDF: A Comprehensive Guide
This comprehensive guide details the NOCO Boost Plus GB40, offering instructions on usage, safety, and troubleshooting,
accessible through its PDF manual, ensuring optimal performance and longevity for your jump starter.
The NOCO Boost Plus GB40 is a portable lithium jump starter designed for 12-volt vehicle systems. This powerful device delivers 1000 Amps of peak starting current, capable of jump-starting cars, trucks, SUVs, and more. It’s a compact and lightweight solution for emergency situations, offering a safe alternative to traditional jumper cables.
Unlike conventional boosters, the GB40 utilizes UltraSafe lithium technology, making it spark-proof, reverse polarity protected, and free from the risk of overheating. The included PDF manual provides detailed instructions on safe operation, covering everything from connecting the clamps to understanding the LED indicator lights.
This guide will walk you through the features, usage, maintenance, and troubleshooting of your GB40, ensuring you’re prepared for any roadside emergency. It’s a user-friendly device, but understanding its capabilities and limitations, as outlined in the manual, is crucial for optimal performance and safety.
What’s Included in the Box
Upon opening your NOCO Boost Plus GB40 package, you’ll find several key components designed for effective jump-starting and long-term usability. The core item is, of course, the GB40 lithium jump starter unit itself, featuring a robust and portable design. Included are heavy-duty jumper cables with positively and negatively marked clamps, ensuring correct and safe connection to your vehicle’s battery.
A microfiber storage bag is provided to protect the GB40 from scratches and damage during transport and storage. The package also contains a USB charging cable, allowing you to recharge the unit from a standard USB power source. Crucially, a detailed user manual, available in PDF format, is included, offering comprehensive instructions and safety guidelines.
Finally, you’ll receive a quick start guide for immediate use and a set of instructional diagrams to aid in understanding the device’s features and operation. Refer to the PDF manual for the most up-to-date information and detailed troubleshooting steps.
Safety Precautions
Prior to utilizing the NOCO Boost Plus GB40, carefully review the safety precautions detailed in the accompanying PDF manual. Always wear appropriate eye protection, such as safety glasses, to shield against potential sparks or acid spray. Ensure the jump starter is disconnected from the vehicle battery before making any adjustments or connections.
Never attempt to jump-start a damaged battery that is cracked, leaking, or frozen. Avoid contact with battery acid, and if contact occurs, immediately flush the affected area with clean water and seek medical attention. Do not disassemble the GB40 unit, as this will void the warranty and may pose a safety hazard.
The PDF manual emphasizes keeping the jump starter away from flammable materials and ensuring adequate ventilation during operation. Always follow the recommended polarity (positive to positive, negative to negative) when connecting the clamps. Refer to the manual for complete safety guidelines.

Understanding the GB40 Features
The NOCO Boost Plus GB40, detailed in its PDF manual, boasts 1000 Amps, UltraSafe Lithium technology, and multiple safety features for reliable jump-starting capabilities.
1000 Amp Starting Current
The NOCO Boost Plus GB40, as thoroughly explained in its accompanying PDF manual, delivers an impressive 1000 Amps of peak starting current. This substantial power output is engineered to jump-start a wide range of vehicles, including cars, trucks, SUVs, and even larger displacement engines. The manual emphasizes that this high amperage allows for quick and efficient starts, even in challenging conditions like cold weather, where battery performance is often diminished.
Furthermore, the PDF documentation details how the GB40’s intelligent design regulates the current delivery, preventing damage to sensitive vehicle electronics during the jump-starting process. It’s crucial to follow the manual’s instructions regarding proper connection and procedure to maximize the effectiveness and safety of the 1000 Amp starting current. The manual also clarifies that while the peak amperage is 1000A, the actual current delivered adapts to the vehicle’s needs, ensuring a controlled and safe boost.
UltraSafe Lithium Technology
The NOCO Boost Plus GB40 leverages cutting-edge UltraSafe Lithium technology, a key feature detailed extensively within its PDF manual. This technology distinguishes the GB40 from traditional jump starters by offering a significantly lighter weight and increased safety profile. The manual highlights that lithium-ion batteries are inherently more energy-dense, allowing for a compact design without sacrificing power.
Crucially, the PDF documentation emphasizes the multiple safety layers integrated into the UltraSafe Lithium system. These include built-in protection against reverse polarity, short circuits, over-temperature, and over-discharge. The manual stresses that these safeguards minimize the risk of sparks, fire, or damage to both the jump starter and the vehicle. Users are advised to consult the manual for specific safety guidelines and proper handling procedures to fully benefit from the UltraSafe Lithium technology.
Multiple Safety Features
The NOCO Boost Plus GB40’s PDF manual thoroughly details its robust suite of safety features, designed to protect both the user and the vehicle. Beyond the core UltraSafe Lithium technology, the manual emphasizes features like spark-proof connections, preventing accidental ignition of flammable gases during jump-starting. Reverse polarity protection is prominently featured, safeguarding against damage if clamps are incorrectly connected.
The manual also highlights over-temperature protection, which prevents the device from overheating during prolonged use, and automatic power-off, conserving battery life and reducing risk. Audible and visual alerts are described, providing clear feedback on connection status and potential errors. The PDF stresses the importance of reading the entire manual to understand each safety feature and utilize the GB40 responsibly, ensuring a safe and effective jump-starting experience.

Using the NOCO Boost Plus GB40
The NOCO Boost Plus GB40’s PDF manual provides clear, step-by-step instructions for safe and effective jump-starting, covering connection procedures and operational guidelines.
Connecting to a Vehicle Battery
The NOCO Boost Plus GB40’s manual emphasizes a straightforward connection process to your vehicle’s battery. First, ensure the vehicle is turned off. Then, identify the positive and negative terminals on the battery – typically marked with “+” and “-” symbols, or red and black colors respectively.
Attach the red clamp to the positive terminal and the black clamp to a solid, unpainted metal surface on the vehicle’s chassis, away from the battery. Crucially, the manual warns against connecting the black clamp directly to the negative battery terminal, as this can create sparks near flammable gases.
The PDF guide illustrates proper clamp placement and stresses the importance of a secure connection. Double-check that the clamps are firmly attached before proceeding to the jump-starting sequence, as outlined in the manual, to avoid potential hazards and ensure a successful boost.
Positive and Negative Clamps Identification

The NOCO Boost Plus GB40 manual PDF clearly details clamp identification for safe and effective jump-starting. The red clamp is unequivocally designated for connection to the vehicle’s positive (+) battery terminal. This terminal is often marked with a plus sign or a red cover.
Conversely, the black clamp must be connected to a solid, unpainted metal surface of the vehicle’s chassis – not the negative (-) battery terminal. The manual strongly advises against direct connection to the negative terminal to minimize spark risk near the battery’s potentially flammable gases.
The PDF guide includes illustrative diagrams highlighting the correct clamp placement. Proper identification is paramount; reversing the connections can cause severe damage to the vehicle’s electrical system and potentially injure the user. Always refer to the manual for visual confirmation before connecting.
Jump Starting Procedure ౼ Step-by-Step
The NOCO Boost Plus GB40 manual PDF outlines a precise jump-starting procedure. First, ensure the GB40 is charged. Connect the red clamp to the vehicle’s positive (+) terminal, then the black clamp to a grounded metal surface. Power on the GB40, indicated by illuminated LEDs.
Attempt to start the vehicle. If it doesn’t start immediately, wait 30 seconds before trying again, allowing the GB40 to deliver a consistent charge. The manual advises against continuous cranking exceeding 10 seconds.
Once the vehicle starts, disconnect the clamps in reverse order: black clamp first, then red. The PDF emphasizes safety precautions throughout, including wearing eye protection and avoiding contact with moving parts. Refer to the manual’s troubleshooting section if issues persist.

Advanced Features & Troubleshooting
The NOCO Boost Plus GB40 manual PDF details manual override for depleted batteries and explains error codes, offering solutions for common issues and optimal performance.
Manual Override Mode (Under 2 Volts)
The NOCO Boost Plus GB40 manual PDF explains the Manual Override feature, crucial when a battery registers below 2 volts – a situation where the standard jump-starting process may fail. This mode bypasses the safety protocols, delivering a boost even to severely discharged batteries.
Activation requires pressing and holding the power button for a prolonged period, typically indicated by a flashing light sequence as detailed in the manual. Caution is paramount; using Manual Override on a battery exceeding 2 volts can potentially damage the unit.
The YouTube tutorial referenced in the provided information offers a step-by-step visual guide to activating this feature. Always consult the official PDF manual for the most accurate and up-to-date instructions, as procedures may vary slightly with firmware updates. Proper understanding of this mode ensures successful jump-starts in challenging situations, maximizing the GB40’s utility.
Error Codes and Their Meanings
The NOCO Boost Plus GB40 manual PDF dedicates a section to deciphering error codes displayed by the unit’s LED indicators. These codes signal potential issues, ranging from reversed polarity connections to internal system faults. Understanding these signals is vital for safe and effective troubleshooting.
Common error codes, as outlined in the manual, include indications of low battery voltage, over-temperature warnings, and connection errors. The manual provides a comprehensive table detailing each code’s specific meaning and recommended corrective actions.
Ignoring error codes can lead to damage to the jump starter or the vehicle’s electrical system. Referencing the PDF manual allows users to quickly diagnose problems and implement appropriate solutions, ensuring continued functionality and preventing potential hazards. Prompt attention to these indicators safeguards both the device and the user.
Resetting the GB40
The NOCO Boost Plus GB40 manual PDF details the reset procedure, crucial for resolving certain error states or restoring the device to its default settings. Resetting the unit can address issues like persistent error codes or unresponsive behavior. The manual outlines a straightforward process, typically involving disconnecting and reconnecting the clamps while following a specific sequence.
Before initiating a reset, the manual advises ensuring the GB40 is disconnected from any vehicle battery and power source. The reset procedure aims to clear any temporary glitches or incorrect data stored within the device’s internal memory. Following the manual’s instructions precisely is essential to avoid further complications.
A successful reset should resolve many common operational issues, allowing the GB40 to function optimally. The PDF manual serves as a reliable guide, ensuring users can effectively restore their jump starter to its intended performance.

Maintaining Your GB40
The NOCO Boost Plus GB40 manual PDF emphasizes regular charging and proper storage to maximize lifespan and ensure consistent, reliable jump-starting performance.
Charging the GB40
According to the NOCO Boost Plus GB40 manual PDF, maintaining optimal charge levels is crucial for peak performance. The GB40 can be charged using the included micro-USB cable and a 5V/2.1A USB power source. A full charge typically takes several hours, indicated by the LED indicator lights progressing through their sequence.
The manual advises against using higher voltage chargers, as they may damage the unit. It’s recommended to charge the GB40 after each use, even if it wasn’t fully depleted, to keep it ready for immediate deployment. Furthermore, the manual details that the GB40 can retain a charge for extended periods when stored correctly, but periodic charging is still advised – approximately every year – to maintain battery health. Avoid exposing the unit to extreme temperatures during charging, as this can affect charging efficiency and potentially damage the internal lithium battery.

Storage Guidelines
The NOCO Boost Plus GB40 manual PDF emphasizes proper storage to maximize the lifespan and reliability of your jump starter. It’s recommended to store the unit in a cool, dry environment, away from direct sunlight and extreme temperatures – ideally between 32°F and 104°F (0°C and 40°C).
Avoid storing the GB40 in a discharged state for extended periods, as this can lead to irreversible battery damage. The manual suggests charging it to approximately 75% before long-term storage. Keep the clamps clean and free from corrosion. It’s also advisable to store the unit in its original case to protect it from physical damage and dust. Regularly check the charge level, and recharge as needed, even during storage, to ensure it remains ready for use. Following these guidelines, as detailed in the PDF, will help maintain optimal performance.
LED Indicator Light Guide
The NOCO Boost Plus GB40 manual PDF provides a detailed explanation of the unit’s LED indicator lights, crucial for understanding its status. A solid green light signifies a fully charged and ready-to-use condition. Flashing green indicates a charging process is underway. A solid amber light signals a partial charge, while flashing amber suggests a low charge level requiring immediate recharging.
A solid red light indicates an error condition, prompting users to consult the troubleshooting section of the manual. Flashing red often signifies a safety issue or a problem with the connection to the vehicle. The manual emphasizes that understanding these light patterns, as illustrated in the PDF, is vital for safe and effective operation. Regularly checking the LED indicators ensures you’re aware of the GB40’s condition and can address any potential issues promptly.

Technical Specifications
The NOCO Boost Plus GB40 manual PDF details voltage, current output, operating temperature, and physical dimensions—weight included—for comprehensive product understanding.
Voltage and Current Output
The NOCO Boost Plus GB40 manual PDF meticulously outlines the device’s voltage and current capabilities, crucial for understanding its performance characteristics. Specifically, the GB40 delivers 12V, making it compatible with a vast range of vehicles. Its peak amperage reaches an impressive 1000A, providing substantial starting power even in challenging conditions.
The manual further details the continuous discharge current, essential for prolonged boosting attempts. Understanding these specifications, as detailed in the PDF, ensures safe and effective operation. It clarifies the GB40’s ability to deliver high bursts of power while maintaining a stable voltage output, preventing damage to sensitive vehicle electronics. The PDF also provides information on the unit’s internal resistance and power delivery efficiency, offering a deeper technical insight for advanced users.
Operating Temperature
The NOCO Boost Plus GB40 manual PDF emphasizes the importance of adhering to specified operating temperature ranges for optimal performance and longevity. The device functions most effectively within a temperature range of 32°F to 104°F (0°C to 40°C).
Operating outside this range, as detailed in the PDF, can diminish the GB40’s capacity and potentially cause temporary malfunctions. The manual cautions against using or storing the jump starter in excessively hot or cold environments. It highlights that extreme temperatures can affect the lithium battery’s performance and lifespan. The PDF also provides guidance on allowing the device to acclimate to moderate temperatures before use after exposure to extremes, ensuring reliable operation and preventing potential damage. Following these guidelines, as outlined in the manual, is vital for maintaining the GB40’s functionality.
Dimensions and Weight
The NOCO Boost Plus GB40 manual PDF provides precise specifications regarding the device’s physical attributes, crucial for storage and portability considerations. The jump starter measures approximately 6.5 inches (165mm) in length, 2.8 inches (71mm) in width, and 1.1 inches (28mm) in height.
Regarding weight, the GB40 tips the scales at roughly 2.4 pounds (1.1 kg), making it relatively compact and lightweight for its 1000-amp starting power. The manual emphasizes these dimensions and weight for users planning to store the unit in vehicle compartments or emergency kits. Understanding these specifications, detailed within the PDF, aids in ensuring a secure fit and convenient transport. These measurements are vital for assessing compatibility with various storage solutions and confirming the device’s portability for roadside assistance scenarios.

Warranty Information
The NOCO Boost Plus GB40 manual PDF details warranty coverage, claim procedures, and duration, ensuring customer satisfaction and product reliability for peace of mind.
Warranty Coverage Details
The NOCO Boost Plus GB40’s warranty, as outlined in the official manual PDF, provides coverage against defects in materials and workmanship from the date of original purchase. This warranty typically spans a period of 18 months, though specific terms may vary based on regional regulations and retailer policies.
Coverage encompasses failures occurring during normal use, as described within the user manual. It does not extend to damage resulting from misuse, abuse, accidents, modifications, unauthorized repairs, or acts of nature. The warranty is non-transferable and applies only to the original purchaser.
Crucially, maintaining proof of purchase (receipt or invoice) is essential for any warranty claim. The NOCO Genius website and the GB40 manual PDF provide detailed instructions on initiating a claim and the required documentation. Warranty service typically involves repair or replacement of the defective unit at NOCO’s discretion.
How to Claim Warranty
To initiate a warranty claim for your NOCO Boost Plus GB40, as detailed in the official manual PDF, begin by visiting the NOCO Genius website’s support section. Locate the warranty claim form and complete it accurately, providing all requested information, including your purchase date, order number, and a detailed description of the issue.
You will need to submit proof of purchase – a clear copy of your original receipt or invoice. Photographs or videos demonstrating the defect may also be required to expedite the process. NOCO will then review your claim and, if approved, provide instructions for returning the unit.
Shipping costs for the return may be the responsibility of the customer, depending on the specific warranty terms. Once received, NOCO will assess the defect and either repair or replace the GB40 at their discretion. Refer to the manual PDF for the complete warranty claim procedure and contact information.

Frequently Asked Questions (FAQ)
The NOCO Boost Plus GB40 manual PDF addresses common queries regarding diesel compatibility, charge retention, and safety protocols, offering clear and concise answers.
Can the GB40 be used on diesel engines?
Yes, the NOCO Boost Plus GB40 is generally compatible with diesel engines, but specific requirements depend on the engine size. The GB40’s 1000 Amp starting current is often sufficient for many diesel vehicles, particularly cars and smaller trucks. However, larger diesel engines – commonly found in heavy-duty trucks or machinery – may require a more powerful jump starter.
The manual PDF emphasizes checking your vehicle’s specifications to confirm compatibility. Diesel engines typically have higher compression ratios than gasoline engines, demanding more starting power. It’s crucial to ensure the GB40’s output meets or exceeds the vehicle’s minimum cold cranking amps (CCA) requirement. Refer to your vehicle’s owner’s manual for this information. The NOCO website also provides guidance on selecting the appropriate jump starter for various engine types, including detailed specifications within the GB40’s PDF manual.
How long does the GB40 hold a charge?
The NOCO Boost Plus GB40 boasts an impressive charge retention capability, holding its charge for over a year in storage with minimal power loss, as detailed in the official PDF manual. Unlike traditional lead-acid jump starters that self-discharge rapidly, the GB40 utilizes UltraSafe Lithium technology, minimizing self-discharge rates.
The manual specifies that a fully charged GB40 can remain at approximately 90% of its original charge capacity after a year of inactivity. However, it’s recommended to charge the device every 6-12 months to maintain peak performance. The LED indicator lights provide a quick visual assessment of the remaining charge level. Regular charging ensures the GB40 is always ready for immediate use, offering reliable jump-starting power whenever needed, as thoroughly explained within the downloadable PDF manual.
Is the GB40 safe to use?
The NOCO Boost Plus GB40 is engineered with multiple safety features, making it exceptionally safe for users of all experience levels, as comprehensively outlined in the official PDF manual. It incorporates spark-proof technology, reverse polarity protection, and over-charge protection, preventing damage to both the jump starter and the vehicle’s electrical system.
The manual emphasizes that the GB40 is designed to be non-hazardous when used correctly, adhering to all included safety precautions. UltraSafe Lithium technology eliminates the risk of fire or explosion associated with traditional jump starters. Detailed instructions within the PDF guide users through the correct connection procedure, minimizing the risk of accidental shorts or electrical hazards. NOCO prioritizes user safety, and the manual serves as a crucial resource for understanding and implementing these safeguards.