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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

  • Based on 19,063 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Jun 22
Order within 26 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: 1.6 Pounds


Output Voltage: 12 Volts


Product Dimensions: 3.43 x 4.61 x 7.95 inches


Item Weight: 1.59 pounds


Item model number: GENIUS5


Is Discontinued By Manufacturer: No


Date First Available: November 18, 2019


Department: unisex-adult


Manufacturer: NOCO


Country of Origin: China


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 22

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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Top Amazon Reviews

    • Subaru Owners, your answer to Battery issues is here!
Size: 5A
Did you buy a Subaru subject to the Battery Settlement? I did. Dealing with the dealerships and Subaru to get them to replace a drained battery and fix the parasitic draw issue is a nightmare, and has been for me and my family. I did a lot of homework on this issue. I checked out endless Reddits and Youtube videos about the parasitic draw issue. Then I discovered this baby. Even though my brand new AGM battery was completely drained after driving for ONE DAY after I installed it using the Service Manual, and even AFTER the dealership tried to tell me that the new AGM battery had to be replaced (it didn't), I purchased this as a last-ditch effort when the dealership refused to honor the settlement by telling me they could not conduct a parasitic draw test without me buying a new battery (again). I purchased on Amazon, and it was delivered the same day. The Instructions on use were NOT with the charger, but there is a LINK provided in the packaging that allows you to download the PDF file for the manual. Setup was a breeze. I installed the included wall-mount holder in my garage in less than two minutes. I connected the alligator clips to the power wires on the unit. I read the manual for the proper charging instructions applicable to my battery configuration (positive-grounded versus negative-grounded: spoiler alert, almost every car has negative grounded). I attached the unit according to those instructions, selected the mode (mine was for an AGM battery), and bingo-bango, in a few hours I had nearly 50% charge on what had been an almost completely dead battery. ***a few caveats*** 1. Be sure to take good care of the wires. They are not as thick as the battery wires, so they can easily be damaged. 2. The unit runs warm, so when I unplugged it, it was warm to the touch. Keep this in mind when deciding what to place it on. It has four rubber feet, but I would still be careful. 3. You can use this as a conditioner, charger or repair unit, and it will sense overcharge, and sense overheat, so it has some built in safety features that are nice, but I would still check the unit periodically. 4. I used this for a 12v car battery, but this unit can also be used for 6v batteries and other types, so be sure that you select the right mode in order to ensure proper configuration while it is charging. The lights and indicators are clear and easy to use. Overall, I could not be happier. Highly recommend. ... show more
Reviewed in the United States on June 5, 2025 by G. Johnston
    • Reverse Polarity problem.
Size: 5A
To All the People Who Are interested in buying this Charger,this is my updated review.Please read the original post below after reading this. I am beyond impressed with the exceptional support you provided regarding my NOCO Genius 5. Your team went above and beyond, demonstrating unparalleled dedication to ensuring my complete satisfaction. Your prompt, knowledgeable, and courteous assistance truly sets you apart as a world-class company. Thank you for taking the time to address my needs with such care and professionalism. Your commitment to excellence is evident in every interaction, and I am thrilled to be a customer of a company that consistently exceeds expectations. I will wholeheartedly recommend NOCO to my family, friends, and anyone seeking top-tier products backed by extraordinary service. You are not just a first-class company—you are in a league of your own! With sincere gratitude, Richard Shaffer. Original post below * I recently purchased this and was extremely impressed by how well it worked, but then I encountered a problem. I called NOCO and spoke with Willie G., the customer service representative from NOCO, he was outstanding. After I explained the issues with my NOCO Genius 5 charger—displaying a solid red reverse polarity light despite correct connections, no charging activity, cycling through all lights when unplugged, and an unresponsive mode button—he promptly provided clear instructions for returning the defective device. However, I was disappointed to learn that, despite purchasing the charger on May 7,2025, I had to cover the shipping costs for the warranty repair or replacement, which added an unexpected expense to resolving the issue with a brand-new product. I will update this review after my GENIUS 5 is returned to me. ... show more
Reviewed in the United States on June 5, 2025 by Richard
    • Easy to Use, Safe, and Effective Battery Maintenance
Size: 5A
Review Image by Harrison Logan Harrison Logan
Review Image by Harrison Logan Harrison Logan
I purchased this NOCO battery charger to maintain the battery in my 2000 Ford Ranger, which isn't driven very often. I ran the battery fixer mode, and now it's automatically in maintenance mode, and it's working perfectly. My truck starts right up every time. The alligator clip clamps were easy to attach to my battery terminals, and the cord's locking mechanism ensures a secure connection. The unit operates silently, with no noticeable noise. The indicator lights are intuitive, going from red to green to clearly show the charging status. The instructions provide detailed information about the indicators and modes, though I primarily use the maintenance mode. The charger itself is compact and easy to store. This NOCO charger is packed with safety features. It tapers the charge to prevent overcharging, and the cord's design prevents reverse polarity issues. The instructions also mention that it protects against problems if you accidentally connect the clamps to the wrong terminals. While not the cheapest option, NOCO has a solid reputation, and in my experience, this charger performs exactly as intended. It's a reliable and effective way to maintain a vehicle that isn't driven regularly, providing peace of mind and ensuring my truck is always ready to go. ... show more
Reviewed in the United States on May 7, 2025 by Harrison Logan Harrison Logan
    • Great product - works as advertised
Size: 5A
I had a prior trickle charger that just up and stopped working. By the time I realized it, the car battery was dead. Like totally dead. Well, I researched products to restore the battery and recharge it and decided to purchase this one. I followed the instructions on plugging it in, but with a dead battery, I kept my hopes in check. Well, the product lived up to its hype - in less than 1 day my battery was back to full charge and the car cracked over first try! I have it connected now since we don't drive that car very often and this is a smart trickle charger so I feel like it will maintain the battery better. Easy to use and definitely built in safety. The status lights are great too. Definitely worth the money. Would buy again. ... show more
Reviewed in the United States on May 20, 2025 by dh135

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