NOCO Genius Boost GB40 Review

NOCO Genius is manufactured in the USA. All manufactured products are controlled and subjected to several tests to meet international quality standards. The NOCO Genius starter is distinguished by its ruggedness and durability. Built-in protection against reverse polarity, overheating and short circuits ensure safe use. The enclosure is made of high-strength plastic and can protect against raindrops. LED indicators and function buttons are located on the front of the device. Clips for connection to battery terminals are included. They feature compact dimensions and extended spouts for connection to the battery located in a hard-to-reach place. The power wires and clamps have an insulating layer that retains its elasticity in cold weather. On the other side of the NOCO Genius power booster is a micro USB input for charging, and a 2.1A USB output for charging portable digital devices. The device is equipped with a powerful LED flashlight that has seven modes of operation with multiple brightness settings.

Noco GB40 Boost Plus is an ultra-safe 1000A lithium-based starter charger for use with gasoline and diesel engines up to 6.0 L.

Product description

Noco Genius GB40 Boost Plus is an ultra-safe and portable lithium-ion battery starter charger that provides 1000 Ampere (7000 Joules) to start the engine of a car with an empty battery in seconds. The NOCO GB40 has patented safety technology that includes spark and reverse polarity protection, making them safe and easy for anyone to use. It's a powerful battery source that can be used as a portable power source to charge USB devices like smartphones, tablets, and a host of other gizmos. And it is designed for cars, boats, motorcycles, trucks, and more with gasoline engines up to 6 liters and diesel engines up to 3 liters.

   Compact and powerful lithium starter with a starting current of 1000A (7000J) - up to 20 starts on a single charge
   Ultra-safe device with protection against tampering, sparking, and reverse polarity allows for safe connection to any battery
   Super-bright 100 lumens LED flashlight with 7 light modes including SOS and emergency signal
   NOCO GB 40 Boost Plus can be used as an external battery or power bank for charging smartphones, tablets, wrist electronic watches, etc. - Up to 4 charges for smartphones
   The device is designed for gasoline engines up to 6 liters and diesel engines up to 3 liters installed in cars, boats, lawnmowers, and other vehicles.

   Battery voltage: 12 volts
   Battery type: Lead-acid
   Starting current: 1000A
   Starting energy: 7000 Joules
   Built-in battery: 24 Wh lithium-ion battery
   USB input: 2.1A
   USB output: 2,1A
   Recommended engine volume: petrol up to 6.0 liters, diesel up to 3.0 liters
   Engine type: gasoline, diesel

   NOCO GB40 starter
   Reinforced clamps
   Micro USB cable
   Adapter "dad" type 12V output
   Carrying bag
   User manual and warranty

Video Review


The NOCO GB40 Jump Starter has a simple and clear user interface. The LED status indicators show the charge level of the internal lithium battery and the charging status. An error indicator will display when connected in reverse polarity. Using this jump starter model you can easily turn on the LED flashlight, charge a USB device or use manual control for heavily discharged batteries.

The NOCO GB40 is a compact, pocket-sized jumper that fits perfectly in your glove compartment. It is eight times smaller and lighter than traditional battery boosters.

This powerful lithium starter can start your engine up to 20 times on a single full charge. It is designed for more than 1,000 charge cycles and holds its charge level for more than a year with minimal power loss.

The NOCO genius boost plus gb40 will start any vehicle such as cars, motorcycles, ATVs, UTVs, snowmobiles, jet skis and boats, lawnmowers, and more. Even charges USB devices such as smartphones, tablets, and more.

This starter has rechargeable lithium LED flashlight with seven light modes, including SOS and Emergency Strobe. With several brightness settings, it adapts immediately to different situations. Using its powerful light that will help you see your engine, change a tire at night, or even alert oncoming cars that you need help on the road.

The battery power clamps are 19.5 inches long and can reach most battery terminals. Equipped with high-temperature insulation and silicone wire that remains extremely flexible in sub-zero temperatures down to -40 degrees C, and can withstand high levels of stress and even prolonged exposure to high temperatures.

How many times can the GB40 charge my device?

The built-in USB 2.1A output port can charge all your USB devices like smartphones, GoPro cameras, wireless headphones, and more. For example, the battery capacity inside your iPhone is measured in milliamps or mAh – measuring how long a device lasts. Devices that are frequently used, such as phones and cameras, often require more power to last all day than the device's battery is designed for. The Boost battery pack increases the life and run time of your device. Also, turning on your device from an external battery pack will reduce the charging cycle of the internal battery, extending battery life.

How to use Noco gb40 genius boost jump starter?

You may be concerned when you connect your Noco gb40 boost jump starter to a dead battery and start to hear clicking noises from the charger. The clicking noise is the sound of a relay starting and stopping the charging process and is a normal operational sound when the unit goes into charge mode.

However, if the clicking sound from the charger becomes regular and more rapid then it usually indicates that the battery you want to charge is in a poor condition may be due to its age, or is completely dead so it may not be possible to jump start it.

As the Noco GB40 attempts to charge a battery that needs replacement the voltage will increase far quicker than a healthy battery. This quick increase in voltage will lead to the charger switching off its charging mode. However as the current will then drop quickly then the unit will then start its charging mode again so you will hear a clicking sound. The constant starting and stopping of the charging mode result in the clicking sounds.


Noco Genius Boost Plus GB40 is a lithium jump starter worth having. It is a compact but so powerful device. Used as a portable mini jump starter it can solve your problems related to a drained 12V car battery. Also as a multi-function device it can be used as a power bank. GB40 NOCO recharges your smartphone up to four times so it is great to purchase it when you don’t have the power source nearby.

This advanced technology based on the lithium-ion battery is completely safe to use. No matter whether you are professional or not, with this device you will be able to solve the most common battery problems.

Strength in strength, this lithium starter battery beats traditional lead-acid batteries in size and weight. It's 10X smaller and 8X lighter, and its design makes it more compact and portable than ever before. Conveniently stored in the glove box, center console, trunk, or instrument panel.

In our Noco GB40 review we have identified some things that we don’t really like, such as the design of the device itself, although it is heavy and sturdy. We have found the user manual a bit difficult to read, and it sure would have been nice if it came with some sort of standalone box. It comes without a wall outlet AC charger and any other equipment, so we find this as something that probably should have been included.

There are some things we don’t like very much such as the design of a device itself although it is heavy and durable. We have found the user manual a bit hard to read and for sure it would be great if it came with some self-contained box. It comes without an AC wall socket charger and any other equipment so we find this as something that for sure should have been included.

But we believe that these drawbacks are not strong enough to deny all the great things of this powerful device can do and it is just up to you and your needs. In our opinion it works as promised. It is very important to use it as the manufacturer recommends and we see no reason why this device shouldn’t be in every household.

Thank you for reading the Noco Genius Boost review.