NOCO Boost GB40 – Powerful, Portable, and Ready When You’re Stranded
By PluggedInPicks • May 22, 2025
A dead battery is one of the most disruptive failures a driver can face. When the ignition produces nothing—no lights, no engine turnover, no response—the vehicle is rendered inoperable, and valuable time is lost. Traditional solutions such as jumper cables or waiting for roadside assistance introduce delays and dependence on external help. In critical moments where every minute matters, preparation determines outcome.
The NOCO Boost Plus GB40 is engineered to eliminate this vulnerability. Delivering 1,000 amps of portable power, it provides up to 20 jump starts on a single charge and is capable of starting gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters. Compact in form yet robust in performance, it incorporates spark-proof technology and reverse-polarity protection, ensuring safe operation for all users. With the GB40 in place, drivers are not reliant on outside assistance—they are equipped with a reliable, self-sufficient solution.
| Feature | Details |
|---|---|
| Model | NOCO Boost Plus GB40 |
| Peak Amps | 1,000 Amps |
| Battery Type | Lithium |
| Compatibility | Gas engines up to 6.0L, Diesel engines up to 3.0L |
| Jump Starts Per Charge | Up to 20 |
| Voltage | 12 Volts |
| Charging Port | USB (for recharging the unit) |
| Additional Ports | USB Out (2.1A) to charge devices like phones and tablets |
| Safety Features | Spark-proof, Reverse polarity protection |
| Flashlight | 100-lumen LED flashlight with 7 modes (including SOS and emergency strobe) |
| Dimensions | 6.57 x 3.15 x 7.72 inches |
| Weight | 2.4 pounds |
| Carrying Case Included | Yes (Microfiber Storage Bag included) |
| Accessories | HD battery clamps, USB charging cable |
| Warranty | 1-Year Limited Warranty |
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Operational Advantages of the NOCO Boost Plus GB40
Jump-start your vehicle in seconds — The NOCO Boost Plus GB40 delivers 1,000 peak amps of power to instantly revive dead 12V car batteries. It supports gas engines up to 6.0L and diesel up to 3.0L, making it a dependable emergency tool for cars, SUVs, trucks, ATVs, boats, and more. With the GB40 on hand, there is no need to wait for roadside service or rely on strangers—simply connect the clamps and get back on the road.
Compact design, big performance — Weighing only 2.4 pounds, the GB40 strikes a balance between portability and strength. Its compact size allows storage in a glovebox or emergency kit, yet it rivals larger, bulkier jump starters in output. This efficiency makes it practical for drivers who want serious capability in a form factor that is easy to carry and store.
Up to 20 jump starts per charge — On a full charge, the GB40 is capable of delivering up to 20 jump starts depending on vehicle type and battery condition. This capacity ensures readiness for multiple starts in a single day or during extended travel without constant recharging. It is a reliable companion for drivers who value consistent performance in demanding situations.
Safe and beginner-friendly — Built with reverse polarity protection and spark-proof technology, the GB40 minimizes the risk of accidental short-circuits or electrical hazards. Even if the clamps are connected incorrectly, the device will not activate, protecting both the user and the vehicle. Its intuitive design makes it approachable for all drivers, including those with little technical background.
Built-in 7-mode flashlight — The integrated 100-lumen LED flashlight features high, low, strobe, SOS, and emergency beacon modes. This functionality provides essential visibility for nighttime breakdowns, lighting engine compartments, or signaling for help in roadside emergencies. It adds another layer of utility beyond jump-starting.
USB power bank functionality — With a 2.1A USB output, the GB40 doubles as a portable charger for smartphones, tablets, and other USB-powered devices. This capability extends its usefulness, making it more than just an emergency tool and ensuring that essential devices remain powered during trips, camping, or outages.
Weather-resistant, rugged build — Engineered for use in demanding conditions, the GB40 performs reliably in rain, snow, or freezing temperatures. Its rubberized casing provides extra durability and secure handling, while internal components are designed to withstand repeated use. Whether stored in the trunk or deployed on the roadside, it is built to deliver lasting performance.
Points to Weigh Before Purchasing the NOCO Boost Plus GB40
Not ideal for larger diesel engines — The GB40 is rated for gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters. For heavy-duty trucks, RVs, or commercial vehicles with larger diesel engines, this unit will not provide sufficient cranking amps. In those cases, a higher-rated model such as the NOCO GB70 or above is recommended to ensure reliable performance.
No wall adapter included for charging — While the GB40 ships with a USB charging cable, it does not include a wall plug. Owners must use their own USB wall adapter, such as one from a phone charger, to recharge it from a standard outlet. This does not limit functionality, but it does mean the product is not fully ready to charge straight out of the box.
Doesn’t include a protective hard case — The provided microfiber pouch is useful for basic storage, but it does not offer robust protection against impacts or rough handling. Drivers who plan to keep the GB40 in a trunk, work truck, or glove compartment long-term may find value in purchasing a molded hard-shell case to safeguard the device from accidental damage.
USB-C input, but USB-A output only — The device benefits from USB-C charging input, yet its output is limited to a standard USB-A port. This design choice means it cannot provide modern USB-C fast charging speeds for newer smartphones or devices. It remains practical for emergency charging but does not function as a high-speed power bank replacement.
Takes time to recharge fully — A complete recharge takes approximately three hours when connected to a 2.1A USB wall adapter. The unit does not support rapid charging, so if it has been stored idle or used multiple times, advance preparation is essential. Keeping the GB40 topped off before extended trips ensures it is available when needed most.
Final Verdict: Is the NOCO Boost Plus GB40 Worth It?
Many portable jump starters fail when it matters most—too large to store conveniently, too slow to deliver results, or too unreliable under pressure. The NOCO Boost Plus GB40 stands apart by addressing these shortcomings directly. Compact in design yet delivering 1,000 amps of starting power, it provides a reliable solution for dead batteries in vehicles up to 6.0L gas and 3.0L diesel. Whether in freezing temperatures, heavy rain, or when stranded without assistance, the GB40 ensures that drivers maintain control of the situation.
What the GB40 ultimately offers is more than battery power; it delivers confidence and preparedness in a form that fits easily into a glovebox. Its blend of jump-start capability, USB power bank functionality, integrated flashlight, and advanced safety protections positions it as a versatile and essential automotive tool. For any driver seeking assurance on the road and a practical safeguard against unexpected downtime, the NOCO Boost Plus GB40 is not just an accessory—it is a necessary component of responsible vehicle ownership.
Drive Confident, Stay Powered — NOCO Delivers the Boost You Need
Compact Power for When Every Start Matters.
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NOCO Boost Plus GB40 FAQs
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