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Rechargeable, compact jump starter quickly revives gas and diesel cars, boats, trucks, ATVs, and motorcycles up to 20 times off a single charge. Multi-function design with LED work light, and charging port for USB devices.
Features:
Specs:
The NOCO GB40 Boost+ jump starter provides professional grade performance in a compact and portable design. Rated at 1,000 amps (7,000 joules) of starting power, it can easily jump start gas engines up to 6 liters, or diesel engines up to 3 liters. This means it's great for cars, trucks, boats, motorcycles and ATVs with single battery systems. The rechargeable lithium-ion battery provides up to 20 jump starts per charge. A built-in LED work light and charging port for USB devices make it a great addition to any roadside emergency or safety kit.
The GB40 removes the frustration of having to find or wait for someone to give you a jump. Just attach the clamps to the vehicle's battery terminals, turn the unit on, and start your engine. It's that simple.
The GB40 was designed to provide a simple, user-friendly experience. Back-lit LED indicators let you verify that the unit is operating correctly, and they allow it to be easily operated at night. These indicators signal the unit's charge status and alert you to potential performance issues or errors. This allows you to identify if the unit is too hot or cold for operation or detect a reversed polarity connection to a battery.
The touch-button interface allows you to turn the unit on or off or activate the LED work light at the push of a button. The manual override feature can be selected to jump start a deeply discharged battery, below 2-volts. It is important to remember that when this mode is activated, the unit's safety features will be disabled.
The Boost battery clamps included with the GB40 are built to handle the toughest conditions. Unlike typical, plastic battery clamps, the Boost clamps are constructed entirely of metal, ensuring maximum conductivity. The clamps are covered with an over-molded plastic housing, which makes them easy to operate even with work gloves on. And the durable 8 AWG silicone cables remain flexible in cold weather so you won't struggle while positioning the clamps.
High-tension springs in the clamps let them tightly grip top and side post battery terminals, and prevent them from slipping during use. And the clamps' large teeth provide a strong connection to the terminals.
The cables connect to the GB40 by plugging them into the available Boost connector port. A protective cover ensures the connection point stays protected when the cables are disconnected from the unit.
From jumping a dead battery to changing a flat tire, the GB40 has you covered. The unit has integrated LEDs, with 3 brightness settings, which can be used as a work light in low-light conditions. It can also function as an emergency beacon. Just choose a flash pattern, SOS, blink, or strobe, and then set the unit behind your vehicle to increase visibility and safety.
The GB40 also doubles as a portable power source. The unit has a USB port, which make it easy to charge a smartphone, tablet, camera, wireless headphones, or other device. This is great when you're in an area where power may not be readily available, like a campsite.
The table above provides a quick reference for how many times you can recharge your USB devices before the unit itself needs to be recharged.
The GB40's lithium-ion battery can be recharged from 0 to 100-percent in as little as 3 hours, from a USB-C power source rated at 2-amps. You can easily charge the GB40 while on the go with the included USB-C car charger that plugs into a vehicle's aux port, or cigarette lighter socket.
The Boost Plus can be charged from any USB-C-powered port, like a wall charger or laptop, but can take up to 12 hours to completely charge based on the amp rating of the connection.
The GB40 comes with rubber covers that seal the connection points to protect the unit from dirt, dust, and water. With the ports closed the unit has an IP65 rating, which means it can withstand multi-directional, low-pressure water jets and is completely sealed against solid particles like dust or sand.
The housing is made from tough lexan resin that protects the internal electronics against impacts. The unit can handle being dropped, kicked over, and just about anything else the work day brings with it.
Alternate Instructions
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Cliff A.
4/26/2026
I’ve only used the NOCO once to jumpstart our car in the past year and it worked perfectly. I’ve used it a couple of times during power outages to charge our phones. The NECO’s battery retains its charge exceptionally well even after long periods in storage. I definitely would buy one again.
Mike L.
12/27/2025
A few months ago, I left the car door overnight which killed my battery. The jump starter worked like a charm!!
Sep
12/7/2021
Great. Holds charge for a long time.
William
3/19/2024
It has been over a Year since purchased. The NOCO still has a 75 charge and Works Great!!!
Thomas
9/16/2021
Fine
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William
12/28/2025
Im still quite happy with this jump Starter! We camp frequently at sites with no power. I use this to charge our phones and other electronic devices. One of the best purchases Ive made!