NOCO GENIUS2D: 2A 12V Smart Onboard Battery Charger - Direct-Mount Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid Batteries

I got this partially because I need a SLA charger and maintainer but a little bit also because of it restoration function. Some newer charger/maintainers like this also have the ability to apply a pulse that can help break up crystalization inside the battery. While this will not bring an old or damaged battery back to a new state, it does help with things like when a battery is allowed to discharge too far at least once but not significantly damaged otherwise. I didn't know for sure if it would help with my own car's battery, but decided to try it anyway. It actually did indeed seem to help. Before using this it would only last a few minutes with the radio powered on after the car was shut off before it would shut it down due to low voltage. Now it lasts about 30 minutes. This also translates to holding up much better when sitting over time. This is not magic, so it is very limited in what it is able to do (more serious damage may not even be repairable short of basically rebuilding the battery,) but in cases of one of the more common minor causes of SLA battery capacity loss it does indeed help. As for the actual charging and maintenance functions, these seem to work quite well. It's only a 2A maximum charge rate (it lowers twice in later stages of the charge process) so not well suited to large batteries such as those of a car except as a maintainer (which needs very little actual current,) but will do in a pinch if you have the time (I believe it listed 60 hours as the time required to 100% fully charge a car battery -- although it will likely crank in much less time than that.) You will probably want one of the larger ones for those. However, it does have the advantage of being able to safely work on practically any SLA battery you can reasonably throw at it -- provided you can spare the time for a larger battery. I am also using this to maintain (and hopefully restore) a much smaller battery and so far it seems to be working just fine. I'm not clear on the difference between this one and the 2D model. This one also comes with a mount if you would like to more permanently mount it (such as inside your car.) Interestingly they seem to have made the alligator clips that come with it have screw-mounted rings that can be removed for permanent installation at the terminal screws. This way you don't need a separate set of connectors for each as the 2D model did. So this is an option for those who need to do this.

Very small and compact, very simple to attach to the fire wall of the vehicle, small cord on it, you will need an extension cord to power source. I have one of these hooked to my trophy truck that comes out of the garage once every 2 weeks, engine turns over every time as though it were connected to a brand new battery. This will add a year or 2 to battery life....I hope.

Installed on a Ford Flex that is not driven much. Always needing charged. This product worked great. Just unplug and go. Battery stays charged and saves may battery and less work from the alternator.

Few have the experience with batteries and charging systems that I have. I'm 68 years old and a retired professional mechanic who SPECIALIZED in batteries, starters, alternators and electrical systems. This is what I did for a living and managed a specialty battery store then my own shop that sold virtually every battery for vehicles, diagnosed and installed all related charging and starting system parts. The number one cause of alternator failure is a LOW BATTERY. The alternator is NOT A BATTERY CHARGER. It will not charge up a discharged low battery. Many many folks have heard to jump start a dead battery and let it run or drive the vehicle and it will charge up. I will NOT and puts only a small surface charge on the battery. Essentially the battery is 99% discharged. I have seven vehicles and only one doesn't have a maintainer on it. That vehicle is a non-computerized F-100 Ford. However, my Winnebago RV, 2023 ATV, Honda Sabre M/C, Honda Fit, Ford Ranger and my Dodge Caravan all have maintainers on them. Computerized vehicles that are not used daily that sit for any amount of time get low on charge. That's a fact. As a professional, I can tell you that if you want to do yourself a HUGE favor, use charger maintainers. I use the Noco Genius 1 on many things I own and this Genius 2 now just installed on my Honda Fit. Little is worse than going out to a low or dead batteries. Just as bad is starting a car with a low battery then driving it. It's very bad on the charging system and related components. These Noco products feature wide compatibility, are highly functional and are very simple to use. It really is a plug in and forget product that is highly useful. You just have to remember to disconnect it when you use the vehicle.

Works great! I do wish that the battery connector terminals were slightly smaller holes but it works with a washer, it's a 2 w so it's going to charging speed at 2 w speed. It's easy to use. It appears to be compatible cuz it's automatic. It has the features I needed. It looks to be sealed and safe. One thing I have a problem with is the mounting clamp is just really cheap. It cracked on me in both screw holes. So I ended up having to Jerry rig it with some zip ties because the provided mounting mechanism is an absolute piece of junk.

Easy to install, mount kit works great. Wish it had a quick disconnect cable or a longer AC cable, but neither are a problem for their design. The unit can be left attached to a vehicle and not get damaged by the battery being charged by the car, which isn't the case for some other ones that claim they're able to be "onboard" but need to be disconnected before starting the vehicle.

I recently installed the Genius 2-D On-Board Charger on my RZR, and it has completely simplified how I maintain my battery. The charger itself is compact, efficient, and perfect for powersports vehicles like my RZR. I mounted it securely on the frame in a convenient spot, making sure it had proper ventilation and easy access to the plug. The installation process was pretty straightforward. I connected the charger leads to the battery terminals, then mounted the charger using the included hardware. Once installed, I routed the plug to an easy-to-reach spot so I can just plug it in whenever I want—no more removing panels or fishing for wires. Performance-wise, the Genius 2-D has been fantastic. It automatically keeps my battery charged and conditioned, which is especially helpful if the RZR sits for long periods. I love the peace of mind knowing that the battery is always ready for the next ride. It’s a small upgrade that makes a huge difference in convenience and reliability. If you’re looking for a simple, high-quality charger solution for your RZR, I highly recommend the Genius 2-D On-Board Charger.

The NOCO GENIUS2D is one of those products that instantly shows its quality the moment you open the box. Everything from the packaging to the finish on the charger feels solid and well-engineered. The components are thick, durable, and clearly designed for long-term, real-world use—far beyond the flimsy build you find in cheaper trickle chargers. I purchased two of these units and mounted them on both of our Can-Am Spyder's, and they’ve been flawless. Installation is refreshingly simple. The compact size makes it easy to work with, and the direct-mount design means no extra parts or awkward routing. The only challenge—and it’s a minor one—is finding the best permanent location inside the Spyder’s engine compartment. Space is tight, so a little creativity is required, but once mounted, the charger fits securely and stays out of the way. The wiring length is generous, and the connectors feel premium, locking into place with confidence. Performance is where this charger shines. It maintains the battery perfectly, keeping both bikes ready to ride through cold mornings and long periods of non-use. The smart charging logic is accurate and safe, eliminating the guesswork and babysitting that older chargers often require. For something that draws only 2 amps, the level of monitoring and regulation is impressive. It behaves like chargers that cost double or triple the price, especially those branded for “powersports” but offer no additional value. Because it’s fully automatic and designed to remain onboard full-time, it transforms battery maintenance into a simple plug-and-walk-away experience. For anyone who owns a Spyder, a motorcycle, an ATV, or even a small boat, this charger adds huge convenience for very little cost. Pros • High-quality components and durable construction • Compact, low-profile size ideal for onboard mounting • Simple, straightforward installation • Smart charging logic maintains batteries flawlessly • Excellent value compared to premium powersports chargers Cons • Finding the perfect mounting spot inside a Can-Am Spyder takes a little planning If you want a dependable, professional-grade onboard charger that keeps your Can-Am Spyder battery ready at all times, the NOCO GENIUS2D is an outstanding choice. After installing two of them, I wouldn’t use anything else.

Carga lenta , justo para lo que necesitaba Producto y marca de muy buena calidad

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.

Compacto, fácil de usar e instalar.

Je n'utilise pas souvent mon auto (Dodge Journey 2010) et ma batterie se décharge seule. Impossible de démarrer car la batterie était morte. J'ai donc acheté ce produit. Ne sachant pas vraiment à quoi m'attendre, je suis entièrement satisfait. Le NOCO genius 2D garde la charge de ma batterie comme il prétendait le faire. Même dans les gros froids canadiens, le moteur démarre. Installation facile, suivre le livrait d'instruction qui est traduit en 3 langues :anglais, espagnol et français. La compagnie semble fiable, le site internet est complet et beaucoup de produits pour compléter si besoin. La qualité de construction semble robuste et le 2D est ip65 (équipement étanche à la poussière et protégé contre les projections d'eau), ce qui est parfait pour une installation dans le compartiment moteur de l'auto.

I put a two to 1 power cable in there so when I plug it in this and the block heater turns on. Works fantastic, car starts like a dream even when we hit -40C Easy install and so far seems durable. I liked it so much I bought a couple more as gifts for people that don't drive their cars a lot.