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NOCO

NOCO GENIUS5: 5A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jul 11
Order within 11 hours and 43 minutes
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Size: 5A


Features

  • MEET THE GENIUS5 Similar to our G3500, just better. It's 34% smaller and delivers over 65% more power. It's the all-in-one charging solution - battery charger, battery maintainer, trickle charger, plus desulfator.
  • DO MORE WITH GENIUS Designed for 6-volt and 12-volt lead-acid (AGM, Gel, SLA, VRLA) and lithium-ion (LiFePO4) batteries, including flooded, maintenance-free, deep-cycle, marine and powersport batteries.
  • 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.
  • COMPATIBLE Charges and maintains all types of vehicles, including cars, automobiles, motorcycles, mopeds, lawn mowers, ATVs, UTVs, tractors, trucks, SUVs, RVs, campers, trailers, boats, PWCs, jet skis, classic cars, and more.
  • WHAT'S IN THE BOX Includes a 5A charger, 72-inch AC cable, 80-inch DC cable with battery clamps, and integrated eyelet terminals, mounting bracket, screws, and a 3-year warranty. Proudly designed in the USA.

Description

The GENIUS5 is the ultimate all-in-one solution for battery charging, maintenance, and restoration, delivering 34% more power in a 65% smaller design compared to its predecessor, the G3500. Designed for 6-volt and 12-volt lead-acid (AGM, gel, flooded, and deep-cycle) and lithium-ion (LiFePO4) batteries (up to 120 amp-hours), it is compatible with a vast array of vehicles, such as cars, automobiles, motorcycles, dirt bikes, scooters, mopeds, lawn mowers, ATVs, UTVs, tractors, trucks, SUVs, RVs, campers, trailers, boats, PWCs, jet skis, snowmobiles, golf carts, classic cars, and more; including automotive brands like BMW, Mercedes-Benz, Porsche, Bentley, Maserati, Lexus, Audi, Ford, Chevrolet, Corvette, Cadillac, Prius, Toyota, Subaru, Nissan, powersport vehicles such as Harley-Davidson, Honda, Yamaha, Kawasaki, Ducati, Indian, KTM, Husqvarna, Vespa, Polaris, Seadoo, as well as lawn and garden vehicles such as John Deere, Kubota, Toro and more. Featuring an integrated thermal sensor, the GENIUS5 adjusts its charging profile based on ambient temperature, ensuring optimal performance by eliminating the risk of overcharging in hot climates and undercharging in cold ones. It's capable of charging batteries as low as 1 volt and offers a Force Mode for manually charging completely dead batteries (as low as zero volts). With precision pulse charging, the GENIUS5 restores battery health by reversing sulfation and acid stratification, improving performance and extending battery life. Its advanced monitoring system allows for safe, indefinite connection, making it perfect for long-term maintenance. The package includes a 5A charger (120-240VAC), 72-inch AC cable, 80-inch DC cable with battery clamps, and integrated eyelet terminals, mounting bracket and screws, all backed by a three-year warranty. Proudly designed in the USA, the GENIUS5 combines power, reliability, and convenience in a compact design to keep your batteries ready for whatever lies ahead.

Brand: NOCO


Color: Black


Product Dimensions: 3.43"D x 4.61"W x 7.95"H


Item Weight: 1.59 Pounds


Output Voltage: 12 Volts


Output Voltage: 12 Volts


Input Voltage: 120 Volts


Battery Charge Time: 8 Hours


Current Rating: 5 Amps


Amperage: 5


Compatible Devices: Cars, Boats, Motorcycles, ATVs, RVs, Trucks, SUVs, Scooters, Lawn Mowers, Tractors and More


Connector Type Used on Cable: Battery Clamps


Number of Ports: 1


Item Dimensions D x W x H: 3.43"D x 4.61"W x 7.95"H


Item Weight: 1.59 Pounds


Specification Met: CEC, FCC, UL


Color: Black


Brand: NOCO


Mfr Part Number: GENIUS5


Global Trade Identification Number: 45


UPC: 046221190045


Manufacturer: NOCO


Model Number: GENIUS5


Item Type Name: NOCO GENIUS5, 5A Smart Car Battery Charger, 6V and 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Motorcycle, ATV, Lithium and Deep Cycle Batteries


Warranty Description: 3 year limited


Built-In Media: (2) Black Truss-Head Screws, 3-Year Limited Warranty, Battery Charger Mounting Bracket With Velcro Strap, Battery Charger User Guide, GENIUS5 5A Smart Battery Charger and Battery Maintainer, Needle-Nose Battery Clamps With Integrated Eyelet Terminals


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Reliable Smart Charger That Brought a Neglected Battery Back to Life
Size: 5A
I purchased the NOCO GENIUS5 to maintain the batteries in vehicles that don't get driven regularly, and it has been one of those tools that quickly proves its value. Setup was straightforward. The included connectors are easy to use, and the charger automatically detects the battery and selects the appropriate charging mode. I especially appreciate that it can be left connected for maintenance without worrying about overcharging, which gives me peace of mind when storing a vehicle for extended periods. One of the batteries I used it on had been sitting for quite a while and was struggling to hold a charge. After connecting the GENIUS5 and allowing it to complete its charging cycle, the battery recovered enough to reliably start the vehicle again. While no charger can fix a battery that's physically damaged or completely worn out, this unit did a good job recovering a battery that I initially thought might need replacement. The charger itself feels well-built and the display indicators are easy to understand. I also like that it supports both lead-acid and lithium batteries, making it useful for multiple vehicles and equipment around the house. A few things prospective buyers should know: The 5A charging rate is ideal for maintenance and general charging, but it isn't the fastest option if you're trying to charge a large, deeply discharged battery in a hurry. The indicator lights are simple and functional, though some users may prefer a charger with a more detailed digital display showing voltage and charging status. Overall, this is a dependable smart charger that is easy to use, versatile, and well-built. Whether you're maintaining a seasonal vehicle, motorcycle, lawn equipment, or simply want a charger that can safely stay connected long-term, the GENIUS5 is a worthwhile investment. Helpful tip: If you're using it for battery maintenance, consider installing the included quick-connect lead permanently on the battery. It makes future charging sessions much faster and more convenient. ... show more
Reviewed in the United States on June 22, 2026 by Peter N
    • Great battery charger
Size: 5A
This smart battery charger worked great. I was suspicious at first. But it completely recharged my car battery. Easy to use.
Reviewed in the United States on June 12, 2026 by Jackson126
    • Not USA made but USA designed
Size: 5A
This thing is working great. Easy setup. I used the mounting strap for a permanant mount under the hood of my 2022 Ford E350 RV. I bought this because of the good reviews and that it was said to be a USA made product -- I managed install and hook up in about 30 minutes. I sat down and went through the extra material, real happy with myself over my talented ability to install without instructions (ha, ha). The product is well-made, expensive, sure, but a really nice unit. BUT - It is NOT USA MADE. According to the material that came with this charger, it is made in Vietnam, not in the US, as someone claimed. It is, however, DESIGNED in the USA, but made, or assembled in VIETNAM, or other cheap labor countries, not sure, but mine came from V ... I originally thought I was buying a 100% USA made product, which justified, to my mind, the high price. Will I return it? No, it is doing the job, and is certainly a quality item. I just like to support USA manufacturing and American jobs whenever I can -- something hard to do these days. I buy Ford because it is still a USA owned company, even though half or more, of their cars are filled with components and parts from other countries. It is hard to see any other difference between other manufactures when we see auto plants, like Hyundai, and Toyota, opening assembly plants in the US. The lines get really blurred. Okay, enough -- just be aware -- it is not an American-made product, it is designed in America and assembled somewhere else. ... show more
Reviewed in the United States on May 2, 2026 by Dan Baxley
    • Great compact charger when car needs a quick battery charge
Size: 5A
Really impressed with this charger. It’s super easy to use—just hook it up and it pretty much does everything on its own. I like that it works with both 6V and 12V batteries and even different types like AGM and lithium, so it’s pretty versatile. It’s also compact but still powerful, and I’ve used it to bring a weak battery back to life without any issues. The automatic maintenance mode is a nice touch too since you can leave it connected without worrying about overcharging . Overall, solid build, reliable performance, and great for keeping your car or motorcycle battery in good shape. ... show more
Reviewed in the United States on April 24, 2026 by Henry W
    • Awesome product at a good price
Size: 5A
I would give this 4.5 stars if it was an option. Great product, easy to use, seems to be built well, lots of useful optional products. What keeps it from a perfect 5: the clamps on the cable which connects to the battery terminals could be a size larger, a small paper instruction sheet would be useful, and functionality to prevent it from appearing to be charging (one blinking red LED) when it actually isn’t, because it is being blocked by the battery management system. In my case (Ford F-350 with AGM batteries), I attached the clamps to the pos and neg passenger side battery terminals, pushed the grey button to light up the AGM LED, and the first LED started blinking. Thought I was good to go. Ten hours later, same red LED was still blinking, had not advanced to the second one. Did some research. Found out that on these trucks with a battery mgmt system, you have to go around it by attaching the neg clamp to a bare metal location on the truck, not the neg post on the battery. So moved the neg clamp to a nearby location on the engine head. First red LED again flashed, but an hour later the second one started flashing, and now three hours later, the third one is flashing. Success! ... show more
Reviewed in the United States on April 27, 2026 by Johnny
    • REPAIR MODE // Compared to an older Noco Genius G3500; using for Solar/PV battery bank REPAIR MODE // Compared to an older Noco Genius G3500; using for Solar/PV battery bank
Size: 5A
Review Image by aTypicalEngineer808
Review Image by aTypicalEngineer808
Review Image by aTypicalEngineer808
Update (2/15/23): Used this 5A Noco on my car battery the other day. The battery is 4 years old, and the car gets drive at most, once a week, so not ideal for battery health. Once a year (annually), I try to charge the battery. When I hooked it up, and ran it in normal charging mode, it quickly finished (within five minutes). I switched over to repair mode, which applies a small pulsing current, and ran it for two cycles (repair mode shuts off after 4 hours), so 8 hours total. Using a battery tester (measures battery resistance), the overall health improved after 8 hours. So the repair mode definitely does something different than the regular charging mode. Summary: I have had a NOCO Genius G3500 charger since 2017, and it's a great charger. Recently started building a solar/PV battery bank from old marine (Optima) bluetop deep cycle batteries. So the G3500 was getting a good workout, especially the repair function. So I will be comparing this next generation GEN5X1 in that role. I had ordered the GEN5X1 back in April 2021, and this past Black Friday, the GENIUS5 (5A) was on sale, so I decided to add that one. Also use the Kyzee Load Tester frequently while charging, so listing this that as well as a related product. Testing: On an old really dead Yuasa motorcycle battery. Impressively, it was at 3-4 volts, and the Noco started right up in regular (not repair) mode. Going to let this run a couple of days, and see where it ends up (not expecting it to revive this one). Recommendations: 1) In general, the slower you charge the battery the better it is for the overall longevity and lifespan of the battery. The trade off being that you might have to charge a really dead battery for a couple of days. For batteries less than 100AH (the Optima I was testing on is 55AH), a 5-AMP charger is a good middle ground. 2) Having a good battery tester is also a must, I can recommend either of the two below. Pros: Good fit & finish; repair function; name brand recognition; constant product improvement. Cons: None for now. Conclusion: At $70, rating this 5-stars. If you need onboard mounting, get the onboard model instead. Related Products: NOCO GENIUS5, 5-Amp Fully-Automatic Smart Charger ~ $70 https://www.amazon.com/NOCO-GENIUS5-Fully-Automatic-Temperature-Compensation/dp/B07W8KJH44 KZYEE KS20Pro Car Battery Load Tester ~ $100 https://www.amazon.com/gp/product/B0822CN7K7 NOCO Genius G3500 6V/12V 3.5A UltraSafe Smart Battery Charger ~ $47 https://www.amazon.com/gp/product/B004LWVEKS ... show more
Reviewed in the United States on December 25, 2022 Reviewed in the United States on December 25, 2022 by aTypicalEngineer808
    • Reliable
Size: 5A
I have my Camaro hooked up to the Noco 5 Genius everyday since July of 2022 and it has been working flawlessly. I have so much electronics in my car that even with an oversized Interstate battery it will still drain. But with the Noco 5 Genius I don't have that problem anymore and it actually extended the life of my first battery another couple of years. Very easy to use and very reliable. ... show more
Reviewed in the United States on June 23, 2026 by beemdoubleu
    • High quality at a reasonable cost
Size: 5A
This charger/tender worked well to "revive" a ~80Ah lead acid battery that sat in a low state of charge for nearly a year. After an initial 2.5 hour cycle in repair mode, followed by a higher amp charge from an older/larger charger, a noticeable improvement in battery performance was observed. A shorter repair cycle, about 30 minutes total, restored some capacity on another lead acid battery still in use. There are cheaper desulfator-only options, of questionable reliability/longevity, so the additional features offered on this model were cost-effective for my intended usage. While I have not yet used this as a tender/maintainer for any length of time, the cabling to and from the charger are long enough to reach from one side of a car to the other. This unit did not seem to produce much heat in repair mode with ~75F ambient temp. In auto charge mode between 25% and 75%, it was warm to the touch. I'll have to try a longer charge period to see if it heats up further. This product did not come with a manual in the box, just the warranty booklet. Tracking down a user manual on the manufacturer's site did not require much effort. The 6V and repair mode are not activated by quick presses of the single button. Pressing & holding for a few seconds activates these extra modes from standby. Some form of documentation in the box would have been more convenient than going to the website, but I digress. ... show more
Reviewed in the United States on May 7, 2026 by R. Riley

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