UltraSafe Battery Connection
Spark-proof technology and reverse-polarity protection help reduce common connection mistakes during normal use.
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The NOCO Boost GB40 is a compact, powerful 1000-Amp portable jump starter capable of reviving petrol engines up to 6.0 L and diesel engines up to 3.0 L. Its rugged, water-resistant housing and spark-proof, reverse-polarity protected clamps make it safe for anyone to use. With the ability to deliver up to 20 jump-starts on a single charge, plus built-in USB charging and a 100-lumen LED flashlight, the GB40 doubles as an essential power bank and emergency tool.
Start compatible 12V vehicle batteries safely and independently, without needing another vehicle or traditional jump leads. Compact enough to keep in the car, yet powerful enough for petrol engines up to 6.0 litres and diesel engines up to 3.0 litres.
A flat vehicle battery can happen without warning. The NOCO Boost Plus GB40 gives you a compact source of portable starting power that can be used without waiting for another vehicle or roadside assistance.
The GB40 delivers up to 1000A of peak starting power and can provide up to 20 jump starts from a full charge under suitable conditions. Its NOCO UltraSafe system combines spark-proof technology with reverse-polarity protection to make normal battery connections more straightforward.
It also works as a portable USB power bank and features a built-in 100-lumen LED emergency light, making it a useful addition to a vehicle emergency kit.
A practical jump starter for many popular petrol and smaller diesel cars.
Compact enough to store with motorcycle and powersport equipment.
Suitable where the engine remains within the stated capacity limits.
Useful for commuting, winter travel, holidays and emergency preparation.
The GB40 is a strong everyday choice when compact size, simple operation and convenient vehicle storage are the main priorities. For larger diesel vans, heavy 4x4s, larger motorhomes or regular professional use, consider a higher-output NOCO model such as the GB70.
NOCO GB40 jump starter with battery clamps, charging accessories, storage bag and user guide.
Spark-proof technology and reverse-polarity protection help reduce common connection mistakes during normal use.
Use the GB40 to recharge compatible smartphones, cameras and other portable USB-powered devices while away from a normal power source.
The built-in LED provides multiple brightness, flashing, strobe and SOS modes for roadside inspections and emergencies.
The rugged rubberised housing is easy to store and is rated IP65 against dust and water jets when the ports are securely closed.
Watch the NOCO guide before using the GB40 and always follow the vehicle manufacturer’s approved jump-starting procedure.
Confirm the battery is 12V and locate the approved jump-start terminals.
Connect the positive and negative clamps to the correct terminals.
Check the indicators, switch on the GB40 and start the vehicle.
Disconnect safely and recharge the GB40 after use where required.
Open the sections below for detailed specifications, vehicle suitability, safety guidance and product comparisons.
The NOCO GB40 delivers up to 1000A of peak starting power. It is rated for compatible petrol engines up to 6.0 litres and diesel engines up to 3.0 litres.
This makes it suitable for many everyday cars, motorcycles, boats, lawn equipment and smaller vans.
A fully charged GB40 can provide up to 20 jump starts under suitable conditions.
The actual number will vary depending on the engine, battery capacity, battery condition, outside temperature and how long the unit has been stored between uses.
Recommendation: Check the charge level regularly and recharge the GB40 before long journeys, winter travel or extended periods of vehicle storage.
Spark-proof technology helps prevent sparking during the normal connection process when the GB40 is used in accordance with the supplied instructions.
Reverse-polarity protection alerts the user when the positive and negative clamps have been connected incorrectly.
Always identify the correct battery terminals or manufacturer-approved remote jump-starting terminals before connecting the unit.
The GB40 normally detects the voltage of the connected battery before allowing jump-start operation.
A severely discharged battery may have a voltage that is too low for the unit to detect automatically. Manual Override allows the GB40 to be activated when the correct battery polarity has already been positively identified.
Important: Manual Override disables some of the GB40’s normal safety protection. Only use it when the correct positive and negative terminals have been positively identified and you fully understand the procedure.
The GB40 can be used as a portable USB power source for compatible smartphones, tablets, cameras and other USB-powered devices.
This is useful during roadside emergencies, camping trips, vehicle recovery work and other situations where a normal power source may not be available.
Recharge the jump starter through its USB input using a suitable powered USB connection. The charging time will depend on the output available from the connected power source.
Avoid storing the GB40 for extended periods with a low charge level. Periodically inspect the unit, charging cable and battery clamps for signs of damage.
Video Guide Watch the GB40 charging guideThe integrated LED light provides useful illumination for roadside inspections, locating battery terminals in low light and attracting attention during an emergency.
The seven available operating settings include:
The GB40 is a universal portable jump starter rather than a vehicle-specific fitting product.
Suitability should be determined by the battery voltage, engine capacity and the vehicle manufacturer’s approved jump-starting procedure.
Please note: The GB40 is designed for compatible 12V batteries only. Always check the engine size, battery voltage and vehicle manufacturer’s approved procedure before use.
Best for everyday cars, motorcycles, smaller vans and motorists who want compact emergency starting power.
Better suited to larger petrol and diesel engines, bigger 4x4s, larger vans and motorhomes.
| Feature | NOCO GB40 | NOCO GB70 |
|---|---|---|
| Peak output | 1000A | 2000A |
| Maximum petrol engine | Up to 6.0 litres | Up to 8.0 litres |
| Maximum diesel engine | Up to 3.0 litres | Up to 6.0 litres |
| Starts per charge | Up to 20 | Up to 40 |
| LED light | 100 lumens | 400 lumens |
| Best suited to | Cars, motorcycles and smaller vans | Larger cars, diesel vans, 4x4s and motorhomes |
| Brand | NOCO |
|---|---|
| Model | Boost Plus GB40 |
| Product type | Portable lithium jump starter and power bank |
| Compatible battery voltage | 12V |
| Peak starting output | 1000A |
| Maximum petrol engine | Up to 6.0 litres |
| Maximum diesel engine | Up to 3.0 litres |
| Starts per charge | Up to 20 under suitable conditions |
| Internal battery | Lithium-ion |
| Connection protection | Spark-proof and reverse-polarity protection |
| Ingress protection | IP65 with the ports securely closed |
| LED light | 100 lumens with seven operating settings |
| USB power-bank function | Yes |
A jump starter and a battery charger perform different tasks.
A jump starter is particularly useful for emergencies. A battery charger is normally the better option for vehicles that are stored, used infrequently or regularly complete short journeys.
Yes. GB40 is the model number of the NOCO Boost Plus 1000A portable lithium jump starter.
It is rated for compatible petrol engines up to 6.0 litres and diesel engines up to 3.0 litres.
The GB40 can provide up to 20 starts from a full charge under suitable conditions. Actual performance depends on the engine, temperature and condition of the vehicle battery.
Yes. Its USB output can recharge compatible smartphones, tablets, cameras and other portable USB devices.
The housing is rated IP65 when its ports are securely closed. It offers protection against dust and water jets but must not be submerged.
An extremely low-voltage battery may not be detected automatically. Manual Override may be required, but this disables some normal safety protection and should only be used when the correct polarity has been positively identified.
Check its charge level regularly and recharge it after use, before a long journey and before extended storage.
Compare NOCO portable jump starters, intelligent battery chargers and roadside power products available from InCarTec.
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