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NOCO

NOCO GENIUS2X4: 8A 4-Bank Smart Battery Charger (2A/Bank) - 6V/12V Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Aug 10
Order within 13 hours and 50 minutes
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Size: 8A (2A per Bank)


Features

  • MEET THE GENIUS2X4 A four-bank battery charger for charging multiple batteries simultaneously. It's the all-in-one charging solution - battery charger, battery maintainer, trickle charger, plus desulfator - for four batteries.
  • 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 8A four-bank charger, (4) 75-inch AC cables, (4) 21-inch battery clamps, and integrated eyelet terminals, (4) 10-foot DC extension cables, and a 3-year warranty. Proudly designed in the USA.

Description

The GENIUS2X4 is the ultimate four-bank battery charger, designed to charge and maintain multiple batteries simultaneously with unmatched versatility and precision. As an all-in-one solution, it functions as a battery charger, maintainer, trickle charger, and desulfator for two 6-volt or 12-volt lead- acid and lithium-ion (LiFePO4) batteries (up to 40 amp-hours). Its advanced thermal sensor automatically adjusts charging based on ambient temperature, preventing overcharging in hot climates and undercharging in cold ones. The GENIUS2X4 can charge batteries from as low as 1 volt and offers a Force Mode for manual charging of completely dead batteries (as low as zero volts). Featuring smart monitoring, it ensures safe, indefinite connection for long- term battery maintenance, while precision pulse charging restores battery health by reversing sulfation and acid stratification. 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. The package includes a 8A four-bank charger (120-240VAC), four 75-inch AC cables (US, UK, EU, and AU), four 21-inch battery clamps with integrated eyelet terminals, four 10-foot DC extension cables, and a three-year warranty. Proudly designed in the USA, the GENIUS2X4 offers unparalleled performance and reliability for all your charging needs.

Brand: NOCO


Color: Black


Product Dimensions: 5.71"D x 9.88"W x 10.79"H


Item Weight: 7.78 Pounds


Output Voltage: 12 Volts


Output Voltage: 12 Volts


Input Voltage: 120 Volts


Battery Charge Time: 1 Hours


Current Rating: 8 Amps


Amperage: 8


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


Connector Type Used on Cable: Battery Clamps and Eyelet Terminals


Number of Ports: 4


Item Dimensions D x W x H: 5.71"D x 9.88"W x 10.79"H


Item Weight: 7.78 Pounds


Specification Met: CEC, FCC, UL


Color: Black


Brand: NOCO


Mfr Part Number: GENIUS2X4


Global Trade Identification Number: 34, 33


UPC: 046221190434


Manufacturer: NOCO


Model Number: GENIUS2X4


Item Type Name: NOCO GENIUS2X4, 4-Bank, 8A (2A/Bank) Smart Car Battery Charger, 6V/12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Motorcycle, ATV and Lithium Batteries


Warranty Description: 3-Year Limited


Built-In Media: (4) Charging Extension Cables, (4) Needle-Nose Battery Clamps With Integrated Eyelet Terminals, Battery Charger User Guide, GENIUS2X4 8A 4-Bank Smart Battery Charger and Battery Maintainer (120-220 VAC), Type-A, Type-C, Type-G and Type-I AC Cables


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 10

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

    • Good multiple battery charger when it works.
Size: 8A (2A per Bank)
Ordered this charger on prime day and finally installed it 4 days ago and everything seemed to be working well. However 2 days later port 3 is now flashing that the unit is under temperature and cannot operate. Emailed support and they say that it sounds like the unit is faulty to send it to them under warranty replacement. Kinda a little miffed that after 3 days my brand new unit needs to be replaced but at least support was fast to respond. Hopefully they are as fast to send me a replacement unit and not the 4 to 6 weeks they quoted. This unit comes with a 3 year warranty so hopefully this will not be a repeated occurance. Unfortunately because I delayed setting it up I am outside of Amazon's return/replace window. I have another charger by this company and have not had an issue with it so hopefully it's just bad luck, but only time will tell. I was impressed with the overall build of this unit and the accessories included with it but apparently something under the hood is less than optimal. Update 1: Reached out to NOCO support and they're responce was quick and efficient with an RMA claim paper. Just have to pay for shipping, which was 30 dollars to ship to the factory in AZ. So far my prime day purchase has not been the stellar deal it was supposed to be. I would have hoped that the company would have provided some means of shipment to them for a discounted rate but no dice. More updates to come. Update 2/11/23 new unit has performed as advertised and shows no signs of quitting. Despite initial unit failing new unit has been great and does a great job of keeping my motorcycle batteries up to speed. ... show more
Reviewed in the United States on August 11, 2021 by James M.
    • Awesome tender.
Size: 8A (2A per Bank)
Worth every penny. Used to keep the batteries in the Cat, mower and tractor over the winter in top condition. Just watch if you unhook without putting that line in standby, when you reconnect it might not go back to last mode and go to standby. Simple to have a look at panel to be sure. No issues when I’ve lost main power, all lines go back to last mode, so far…. ... show more
Reviewed in the United States on May 19, 2026 by Seymore Johnson
    • Dependable & Dynamic: Exploring the NOCO GENIUS2X4
Size: 8A (2A per Bank)
I recently started using the NOCO GENIUS2X4 for charging and maintaining multiple batteries, and it’s been a reliable addition to my workshop. With four separate banks delivering 2A each (for a total of 8A), I can work on several batteries at the same time without worrying about overloading any single unit. The smart charging feature adjusts the current to suit different battery types, making it both efficient and safe. The build quality is solid, and the compact design makes it easy to store or transport. Overall, it's a dependable charger that has streamlined my battery maintenance routine, whether I'm dealing with car batteries, power tools, or other rechargeable equipment. ... show more
Reviewed in the United States on March 11, 2025 by PETE
    • Extension cables come with it for easy routing and keeps our 4 vehicles at peak charge.
Size: 8A (2A per Bank)
What a great product. We use this for our "not so often used vehicles" in our garage. We had the issue of our vehicles not being ready to drive when we wanted to take them out for a weekend spin or up to a local car show due to drained batteries. This eliminates the issue by maintaining a full charge. The multiple ports are awesome and the extension cables make routing a breeze. The size and compact design make it look great and a nice addition to our garage. I also use it for our other lawn, atv and other batteries. Simply connect and it's intelligent system detects the battery type, size and charging needs. Shuts off automatically and will turn back on if it detects a voltage drop. Love this thing! ... show more
Reviewed in the United States on March 25, 2025 by MvF Family
    • This charger is absolutely amazing!!!
Size: 8A (2A per Bank)
I bought this in November 2023 and I can say this thing is absolutely amazing!!!! I plugged it in the day it showed up and it has been used every single day since then, currently 1-23-26. I had an optima yellow top that was ran completely dead last winter and sat outdoors in my broken down truck for 2 months of winter. I thought for sure it was going to be ruined because it was literally frozen when I brought it in, but this charger literally brought it back to life and the battery is still alive today. I also have both my motorcycles and a spare battery hooked up to this 100% of the time they’re not being used and it keeps them perfectly charged. Don’t hesitate buying this, I promise you won’t regret it. Buy it, plug it in, hook it up to your battery and forget about it because this charger automatically does everything on its own. ... show more
Reviewed in the United States on January 24, 2026 by Jason Driskell
    • Works great. Easy to use. Does the job.
Size: 8A (2A per Bank)
I was persuaded to but this unit by the salesguy in Autozone and they dont even stock it (or didnt at this MA location)! He said he uses it and loves it. I took his advice and bought it on Amazon, even thought its relatively expensive compared to some other chargers. Its worth every penny! It can charge up to four batteries at once, clearly indicates (via LED lights) where it is at in the charging process, will not over charge and then (the best bit) keeps the batteries at peak charge, all the time, automatically. I am using it to charge two RV batteries and a yard tractor battery over winter. I love it. I literally just attached the batteries and walked away knowing they will be in great shape this spring. Aaah, peace of mind. Enjoy!! ... show more
Reviewed in the United States on January 28, 2024 by Ross Davies
    • Great Garage gadget for car collectors / outdoors enthusiasts.
Size: 8A (2A per Bank)
The Genius 2x4 is great for anyone who has to maintain multiple vehicles, whether it be an off-road vehicle, collector cars, boats, ATVs... this unit is awesome! I keep my collection of cars plugged in, so that way even the vehicles I don't drive as frequently have fully charged batteries. For my use case I would have liked to see basic unit include a few extra extension cables for the charging leads, and/or ring fitting connections included instead of all of the various types of wall outlet adapters, as those will go in my spares drawer never to be used again, while I still now need to order a few extra accessories to get setup exactly how I want. My box included 2 of a single type of the included power adapters, so I got an extra of one, and didn't get another. I got the adapter that is used in my country. Which was weird, but not a deal breaker. My two issues aside, this is a great unit and I would recommend it to anyone who's a car collector to have in their garage. ... show more
Reviewed in the United States on February 26, 2026 by DriverJ's Garage
    • Very impressed!
Size: 8A (2A per Bank)
Bought this to maintain my batteries for the boat through winter, worked perfectly! Nice compact charger, I mounted it to my garage wall above the work bench, terminal clips are moderate to heavy duty and constructed well. NOCO makes good quality products at a decent price point which is affordable.
Reviewed in the United States on June 30, 2025 by Marc Pierce

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