product image
product image preview
product image preview
product image preview
product image preview
product image preview
product image preview

NOCO GENIUS2D, 2A Direct-Mount Onboard Car Battery Charger, 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Marine, ATV, Truck and Deep Cycle Batteries

39.95

Save 20%

Other platform prices

NOCO GENIUS2D, 2A Direct-Mount Onboard Car Battery Charger, 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Marine, ATV, Truck and Deep Cycle Batteries

4.7

4K+ bought in past month

Highest ranking 101

13 comments

$39.95

Save 20%

Other platform prices

· MEET THE GENIUS2D — A direct-mount onboard battery charger for an under-the-hood battery charging. It's the all-in-one charging solution - battery charger, battery maintainer, trickle charger, plus desulfator. · DO MORE WITH GENIUS — Designed for 12-volt lead-acid (AGM, Gel, SLA, VRLA) batteries, including flooded, maintenance-free, deep-cycle, marine and RV batteries. · DIRECT MOUNT — Securely attaches near the battery using a durable snap-fit mounting bracket and installs easily into most surfaces with truss-head self-tapping screws for a hassle-free installation. · ENJOY PRECISION CHARGING — An integrated thermal sensor dynamically adjusts the charge based on ambient temperature, preventing overcharging in hot weather and undercharging in cold, ensuring optimal battery performance. · CHARGE DEAD BATTERIES — Charge batteries from as low as 1 volt, or use Force Mode to manually charge completely dead batteries down to zero volts. Perfect for recovering deeply discharged or neglected batteries. · BEYOND MAINTENANCE — Keep your battery fully charged without worrying about overcharging. Our smart charger constantly monitors the battery, allowing you to leave it connected safely - indefinitely - for worry-free maintenance. · RESTORE YOUR BATTERY — Precision pulse charging automatically detects and reverses battery sulfation and acid stratification, restoring your battery's health for improved performance and extended lifespan. · WHAT'S IN THE BOX — Includes a 2A onboard charger, 24-inch AC cable, 24-inch DC cable with eyelet terminals, mounting bracket, screws, and a 3-year warranty. Proudly designed in the USA.

Related products

Reviews From
avatar

DANJAReviewed in the United States on May 12, 2025

I have two Yamaha FXHO Waverunners. The original lead acid battery that came from the factory on my 2021 model always starts without issue even if it sets up all winter. My 2007 with a new AGM battery always has trouble starting if I don't run it frequently. Leaving it idle all winter killed the previous battery. The units came with zero instructions. I had to return to the Amazon listing to see an explanation of the red and green solid/pulsing lights on the units. The packaging does state that it is for batteries up to 40ah. I just installed two of the Noco Genius 2D devices and will come back here to update how they are performing.

avatar

Rick SReviewed in the United States on April 5, 2025

Works better than expected, so far. I've had this roughly a month or two. Since Covid happened, I've been working from home. While that is great, it means I might not drive my car for weeks on end. If you can remember to auto start your vehicle on a regular basis, then perhaps this isn't needed. But if you don't, the computer and electronics are gonna suck your battery dry. Let it go too long and it'll discharge the battery so much, it'll never hold a charge again. This is the solution. Only downside so far, is I had to leave the hood unlatched to plug the exterior grade extension cord in. With the hood not secure, remote stater will not engage. I can't start the car from the house in that configuration. I've bought an external plug the connects to this and routes the connection to a spot in the grill or fender. (Also bought here) I just haven't had the, the time, the nerve, or the weather yet, to cut a hole in my car to install it! Will update my review when I decide where it will go. Btw: You still need to run the car at least once a month or your gas will go bad. If the car is gonna sit like that, don't fill the tank!

avatar

Southern BoyReviewed in the United States on May 8, 2025

Perfect! I have an older Honda Odessey van with the dreaded vampire drain on the battery which depletes my charge in a day. This NOCO is small and fits into my hood space. I just ran the a/c cord out the bottom and plug it in without having to open the hood. Keppa the battery charged and shuts off when done. I hard wired it directly to the battery with supplied leads. I zip tied all loose ends.

avatar

Terry WilliamsReviewed in the United States on May 3, 2025

Great little device for keeping your battery at a full charge in a boat. Hook it up, plug it in and forget it. Just that easy..No need to brake out the big charger for what this little thing can do.

avatar

Kurt L.Reviewed in the United States on April 17, 2025

Does the job I require, but longer power cords will make it easier to work with on multiple cars or trucks.

avatar

Cat People - Slava Ukraini 🇺🇦Reviewed in the United States on April 17, 2025

I have a regulated power supply, deep cycle battery, and this charger. I have set up a 12 inch woofer in my office with an amplifier. This little charger is perfect to plug your car amplifier in. It keeps my battery perfect and my system sounds great. I no longer have to drive in my car and get tickets for my radio to be loud. Now I can do it in my house.😂

avatar

Dot _ AnonymousReviewed in the United States on April 9, 2025

Too small for my application, but I still give it 5 stars because it does exactly what it's meant to do. Best used as a battery maintainer for starting batteries (generator, motorcycle, car, etc...) I installed it in my RV, and when I'm using the RV for a few days at a time, the batteries run down because I really need more power than the 2A this charger provides - but again, it works perfectly.

avatar

JeffReviewed in the United States on May 2, 2025

Used it to keep my car battery charged over the winter, while car was in storage. After sitting for nearly 5 months car fired immediately. Would definitely recommend.

avatar

Gerardo F.Reviewed in Mexico on February 4, 2025

Muy buen producto Gracias

avatar

Jami TaschukReviewed in Canada on July 3, 2023

As an avid car enthusiast, maintaining the health and longevity of my vehicle's battery is of utmost importance to me. The NOCO GENIUS2D 2A Direct-Mount Intelligent Onboard Battery Charger has been an absolute game-changer in ensuring that my car battery stays charged and ready to go at all times. This intelligent onboard battery charger is specifically designed for 12V car batteries, and after using it for a while, I can confidently say that it is a fantastic investment for any car owner. lug in I live in Canada and we have cold winters where we need block heater to keep the engine warm in -30F nights. I Use a double plug-in and have both block heather and charger powered. This keeps the battery warm and powered up for starting. Pros: Easy Installation: The installation process was a breeze. Thanks to its direct-mount design, I was able to install the NOCO GENIUS2D charger directly onto my car's battery. The package came with clear instructions, and the whole process took only a few minutes. Intelligent Charging: One of the standout features of this charger is its intelligence. The GENIUS2D is equipped with an advanced microprocessor that constantly monitors the battery's status and adapts the charging process accordingly. This ensures efficient charging, prevents overcharging, and helps extend the battery's lifespan. Multi-Stage Charging: The charger utilizes a multi-stage charging process, which is excellent for battery maintenance. It starts with a gentle trickle charge to bring the battery up to a suitable voltage, then switches to a bulk charge phase, and finally, a maintenance phase that keeps the battery at an optimal level. Versatility: While I primarily use it for my car, the GENIUS2D is also compatible with a wide range of other 12V lead-acid batteries, including marine batteries and deep-cycle batteries. This versatility is a huge plus, as it allows me to use it for other vehicles and equipment when needed. Durable Build: The charger's build quality feels solid and durable. The rugged construction ensures that it can withstand the rigors of daily use and various environmental conditions. Cons: As with any product, there are a few minor drawbacks to consider: Charging Speed: The NOCO GENIUS2D has a charging rate of 2 amps, which is sufficient for maintenance charging and ensuring the battery stays topped up. However, if you need to recharge a fully depleted battery quickly, you might need a charger with a higher amperage. Mounting Location: While the direct-mount design is convenient, it might not be suitable for all vehicle types. Depending on the battery's location and the car's design, mounting it directly might be a challenge. Conclusion: The NOCO GENIUS2D 2A Direct-Mount Intelligent Onboard Battery Charger has proven to be a reliable and efficient tool for keeping my car's battery in optimal condition. Its intelligent charging capabilities, ease of installation, and overall performance make it an excellent choice for any car owner looking to extend the life of their 12V battery. Despite its slightly lower charging speed, the benefits it offers in battery maintenance far outweigh this minor limitation. I highly recommend the GENIUS2D for its top-notch quality and peace of mind it provides when it comes to the health of your vehicle's battery.

avatar

Amazon CustomerReviewed in Canada on January 31, 2023

The GOOD: - Intelligent no nonsense unit - Love that it determines on its own if a battery has gotten weak from sitting and performs desulfication not many units do that ESPECIALLY at the price point, Small, straight forward to install, Works well so far in colder Canadian (Ontario mind you no 'professional strength cold like the prairies). The BAD: - Cables are a bit short. If your battery is not near the front radiator like traditional cars were and instead closer to the firewall you may come up a bit short. Sure an small extension cord can be added or as i did splice in an extension but for a few cents of cable and large number of cars these days that push the battery to the firewall for weight distribution its a bit of a possible nuisance thats not necessary. BOTTOM LINE: really great unit

avatar

Luis gonzalezReviewed in Mexico on December 13, 2024

Casi no ocupo mi jetta A4 y lo instale dentro del cofre y Lo tengo conectado con un enchufe inteligente que solo encienda por las noches y se apaga de día y cuando lo voy a ocupar enciende el carro sin ningún problema y así mantengo la batería en perfecto estado lo recomiendo

avatar

MJReviewed in Mexico on February 8, 2024

Compacto, fácil de usar e instalar.