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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 Wednesday, Apr 29
Order within 22 hours and 24 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 Amps


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: Wednesday, Apr 29

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

    • Great value and good charger
Size: 5A
Works great, easy to use and use it mainly to bring my car battery back to full strength as I don't use it that often. I like the mounting bracket. Mounted it on my wall, but I did add a spacer underneath it because the charger gets pretty warm/somewhat hot, thus allowing air flow all around it. The small size & weight is great. The alligator clips are very good and adhere to the battery very well. Its obviously slower that my large 10 amp charger as should be expected, so if your looking for faster recoveries and less need for a trickle charger, get the 10 amp version. I am leaning into getting one to replace my old 10 amp charger. ... show more
Reviewed in the United States on January 5, 2026 by Jeff D
    • Good product
Size: 5A
Perfect for what I needed. Very easy to use and works well. It does take some time depending on your battery but worth the price.
Reviewed in the United States on March 11, 2026 by TroutGirl
    • Works better than expected
Size: 5A
Hooked it up and it went to work and within n a couple of hours my car battery was fully charged and on green and holding! Super glad I bought this model! It’s small and easy to use
Reviewed in the United States on April 11, 2026 by Kindle Customer
    • Good AGM Battery charger and will do trickle charge for maintenance
Size: 5A
This battery charger brought an AGM battery back from about 25% charge. I like the multiple connection options and the ease of use. The charger can also be used as a trickle charger and also be mounted if needed. I would recommend to others.
Reviewed in the United States on April 22, 2026 by William E. Daniel
    • Reliable and Efficient Battery Charger but no Instruction Guide Included
Size: 5A
The NOCO GENIUS5 does exactly what it’s supposed to do. It charges my older vehicle’s battery quickly and efficiently. I noticed it works faster and more reliably than the cheaper charger I own. It’s is more compact, well-built, and feels like a quality product that’s designed to last. However, I do wish it came with an instruction guide explaining its functions and indicators. As someone who isn’t particularly knowledgeable about cars, having clear instructions would have made things easier. My cheaper charger actually came with a very helpful guide, so I was a bit surprised that this one didn’t. I ended up having to look online to make sure I was using it correctly and safely. Another thing I notice is that the button is not as intuitive. There's a delay when pressing the button. That said, once I understood how it worked and managed my patience, it performed flawlessly. I just wish the user guidance matched the quality of the device itself. ... show more
Reviewed in the United States on October 19, 2025 by Prima
    • Great value and good charging
Size: 5A
Great compromise between price and usability. A full charge on a depleted battery may take 24 hrs or so but the lower rating allows me to use it with a 100 ft heavy gauge extension chord without worries. I would not want a smaller unit and a larger draw unit would make me worry about using an extension chord. Great and reliable unit. ... show more
Reviewed in the United States on February 21, 2026 by Chuck
    • Maintain, revive, and keep your batteries alive!
Size: 5A
I read a lot of reviews before buying this so I wanted to voice my opinions also. This was used to maintain a Porsche 911 during the cold Chicago winters, especially the past one. We had constant -30 degrees for weeks and a month where it didn’t go above 20 degrees. This worked flawlessly. Not only did it work to maintain the Porsche’s AGM battery, it also revived a dead battery I had in my Toyota. This battery was a lead battery that hasn’t had a charge in over a year, and I figured I could test out the “repair mode.” Note that it was recommended to let the battery charge regularly if it could, which took my completely dead battery 3 days to do when ambient temps were 20 degrees F. I ran a repair mode after it was charged and the car fired up right away after a YEAR of being completely dead. The unit itself is also small and can fit anywhere your cell phone can. I would recommend this charger to anyone. It’ll maintain, revive, and keep your batteries alive. This review is not sponsored at all, completely my own thoughts. Thanks! ... show more
Reviewed in the United States on March 5, 2026 by DJ Reyes
    • Fantastic charger with options for many different batteries
Size: 5A
This is a fantastic charger, with support for different battery types (including 6v) and a connector to detach for different battery connection needs. I have a 30+ yr old truck that we don't drive very much, so the battery is often discharged. Our old, large charger stopped working, so I bought this as a smaller option. The eye terminals can be attached to the battery/vehicle directly and left under the hood, then just plugged into the charger when you want to charge it back up. The 5A charge isn't super-speedy, but I knew that going in, so I use this to charge overnight and the battery is ready to go by the morning. If you need faster charging, look for a version of this product that offers more charging power. Once charging is complete, it will stay in maintenance mode and maintain the charge, so you can get it started way in advance and you'll still be good. It's very easy to use, with only one button to control selection of the battery type and/or charge mode. It's not complex, but always takes me a few attempts to find repair mode. Press and hold for 3 seconds to switch to a 6V battery. Press and hold for 5 seconds to switch on Force mode, which you'll need if the battery is really dead (under 1V) - that will attempt to charge even without sensing the battery is connected. To get to repair mode, you'll have to be connected to the battery, in standby, then press and hold for 5 sec, which I think starts both Force and Repair. This is small and light enough to store in your glove box, and can be tucked into a small corner of the engine compartment so you can close the hood while it charges. I like Noco products - they're well worth the price for high quality gear. ... show more
Reviewed in the United States on July 25, 2025 by K.C.

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