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NOCO Genius Smart Battery Charger - AC to DC - 6V/12V - 2 Amp

NOCO Genius Smart Battery Charger - AC to DC - 6V/12V - 2 Amp

Our Price: $49.98
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Battery Charger
Shipping Weight: 1.41 lbs
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Compact smart charger draws power from a wall outlet to charge and maintain batteries on cars, RVs, boats, motorcycles, ATVs, snowmobiles and lawn mowers. Force mode revives dead batteries. Charges lead-acid and lithium-ion batteries. 1-800-940-8924 to order NOCO battery charger part number 329-GENIUS2 or order online at Free expert support on all NOCO products. Great prices and Fastest Shipping for NOCO Genius Smart Battery Charger - AC to DC - 6V/12V - 2 Amp. Battery Charger reviews from real customers.
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  • Reviews (147)
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NOCO Battery Charger

  • ATV
  • Boat
  • Car/Truck/SUV
  • Generator
  • Jet Ski
  • Lawn Mower
  • Motorcycle
  • RV/Camper
  • Snowmobile
  • Trolling Motor
  • 6V
  • 12V
  • Battery Charger
  • NOCO
  • Wall Outlet to Vehicle Battery
  • Charges/Maintains
  • Trickle Charge
  • 40 Ah

Compact smart charger draws power from a wall outlet to charge and maintain batteries on cars, RVs, boats, motorcycles, ATVs, snowmobiles and lawn mowers. Force mode revives dead batteries. Charges lead-acid and lithium-ion batteries.


  • AC-to-DC smart charger quickly charges and maintains a battery
    • Perfect for charging ATVs, wave runners, lawn mowers, and other equipment
    • Great for daily battery maintenance or long-term storage of cars, boats, trucks, RVs
  • Multiple battery profiles let you charge a variety of battery types at different voltages
    • 6V Modes - normal
    • 12V Modes - normal, AGM, and lithium-ion
    • Force mode provides a constant charge to revive dead batteries
  • Multi-stage charging algorithm charges 2x faster than traditional chargers without overcharging
    • Analyzes battery condition to provide a customized charge
    • Built-in battery desulfator restores lost battery capacity
  • Precision needle-nosed battery clamps are spark-proof and have reverse polarity protection
    • Built-in 4-amp fuse protects electronics from dangerous overloads
  • Simple operation with mode button and LED indicators
    • Auto-memory feature remembers the last charge mode if power is lost
  • Snap-fit bracket and hook-and-loop strap secure unit near battery
  • Durable resin housing is rugged and water resistant - perfect for on- or off-board applications
  • X-Connect series accessories (sold separately) provide connections for additional applications


  • Application: 6V and 12V batteries up to 40 amp-hours
  • Battery types supported: wet cell, gel cell, enhanced flooded, maintenance-free, AGM, and Lithium-ion
    • Lithium-ion batteries must have battery management systems (BMS)
  • Maximum charging amperage: 2 amps
  • Battery clamp cord length: 77"
  • AC cord length: 71"
  • Input voltage: 120 - 240 VAC (50 - 60 Hz)
  • Maximum power consumption: 30 watts
  • Low voltage detection rating: 1 volt
  • IP rating: 65
  • Operating temperature: -4 F to 104 F
  • Dimensions: 5-1/2" long x 2-7/16" wide x 1-3/4" thick
  • Weight: 1.1 lbs
  • 3-Year limited warranty

NOCO GENIUS2 Smart Battery Charger Dimensions

The NOCO Genius 2-amp smart charger quickly charges and maintains your 6V and 12V lead-acid and lithium-ion batteries, using a standard household outlet. Rated for 6V and 12V batteries up to 40 amp-hours, it's a great charger for ATVs, wave runners, lawn mowers, and other equipment. It's also ideal for daily battery maintenance or long-term storage of cars, boats, trucks, and RVs. With 4 selectable battery profiles, multi-stage charging, and advanced safety features, this Genius smart charger makes it easy to keep your batteries in peak condition. There's even a Force Mode feature for charging dead batteries with 0-volts.

NOCO GENIUS2 Genius Battery Charger Operation

This Genius smart charger removes the frustration of having to own multiple devices to charge different battery types and vehicles. Just attach the battery clamps to the vehicle's battery terminals, select a charging mode to match your application, and wait for the LED indicator to signal that the battery is completely charged. It's that simple.

User-Friendly Interface with LED Indicators

NOCO GENIUS2 LED Charging Indicators

This Genius smart charger was designed to provide a simple, user-friendly experience. The mode button allows you to easily cycle through the unit's charge settings. Back-lit LED indicators let you verify that the unit is operating correctly, and they allow it to be easily operated at night. These indicators signal the unit's charge status, selected charging mode, and alert you to potential performance issues or errors.

NOCO GENIUS2 Smart Diagnostics Troubleshooting Explained

This allows you to identify if the battery voltage is too high or too low for your selected mode, or detect a reversed polarity connection to a battery.

5 Battery Charging Modes

This Genius 2-amp smart charger has 5 selectable charging modes that let you quickly switch between charging different lead-acid and lithium-ion battery types at different voltages. Traditional battery chargers generally only work with a specific voltage or battery type, like lithium-ion or AGM batteries, or only in special circumstances like charging in cold environments. This Genius smart charger gives you the versatility to tackle different battery types and charging situations in one charger.

NOCO GENIUS2 Automatic Battery Charger Charging Modes Explained

The image above details the available charging profiles. The charger works with 6V and 12V wet cell, gel cell, enhanced flooded, calcium, maintenance-free, AGM, and 12V lithium-ion batteries with battery management systems (BMS).

NOCO GENIUS2 Force Mode for Charging Zero Voltage Batteries

The Genius 2-amp can detect and charge batteries that have been drained to 1-volt. And by activating the Force Mode, the charger can even charge dead batteries with 0-volts. Traditional chargers can't detect a battery when the voltage drops below a certain level. To activate Force Mode hold the mode button down for 5 seconds.

Genius Precision Battery Clamps

NOCO GENIUS2 Genius Precision Battery Clamps

The needle-nosed battery clamps included with this Genius smart charger are designed to easily connect to battery terminals of all shapes and sizes. Unlike typical, plastic battery clamps, these clamps are constructed entirely of metal, ensuring maximum conductivity. The clamps are covered with an over-molded plastic housing, which makes them easy to operate even with work gloves on. A built-in 10-amp fuse protects your connection against dangerous overloads.

NOCO GENIUS2 Battery Clamps with Eyelet Connectors

1/4" Eyelet connectors can be unbolted from the clamps for direct mounting to terminals on hard-to-reach batteries. The lie-flat design ensures maximum contact with terminals to optimize current transfer.

Quickly Charge and Maintain Batteries from 120VAC Power Source

NOCO GENIUS2 AC Plug for Wall Outlet Charging

This Genius smart charger plugs into an available wall outlet to quickly charge and maintain your battery. High-frequency switch-mode technology converts AC power into safe DC power to fully charge batteries. An onboard microcomputer monitors and controls this charging process to minimize power loss and maximize efficiency. The included mounting bracket with hook-and-loop strap lets you mount the unit in an enclosed compartment, garage, or workspace.

NOCO GENIUS2 Charging Times for Battery Sizes

The table above provides a quick reference for how long it will take the unit to charge some different battery sizes.

Rugged Weatherproof Design

NOCO GENIUS2 Rugged Weatherproof Housing

The Genius2 smart charger comes with over-molded connection points to protect the unit from dirt, dust, and water. The unit has an IP65 rating, meaning the housing is considered "dust tight" and protected against water sprayed from a nozzle. A durable X-connect plug ensures a weathertight connection when attaching the clamps to the charger.

The housing is made from tough Lexan resin that protects the internal electronics against impacts. The unit can handle being dropped, kicked over, and just about anything else your day brings.

Interchangeable X-Connect Accessories

NOCO GENIUS2 X-Connect Accessories for Versatile Charging Solutions

This Genius smart charger features a unique X-Connect plug that lets you disconnect the battery clamps and attach other X-Connect accessories (all sold separately) for versatile plug-and-play charging solutions. Add an extension cord to increase your connections reach, or use the 12V female plug to connect and power 12V accessories. Access your vehicle's battery through charging ports with the OBDII connector, or the 12V male plug. With a large variety of available accessories this battery charger can be outfitted to meet your application's specific charging needs.

GENIUS2 NOCO Smart Battery Charger and Maintainer - AC to DC - 6V/12V - 2 Amp - 30 Watt

Replaces part number: G1100

Item # 329-GENIUS2

Installation Details 329-GENIUS2 Installation instructionsAlternate Instructions 329-GENIUS2 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

NOCO Genius Smart Battery Charger - AC to DC - 6V/12V - 2 Amp - 329-GENIUS2

Average Customer Rating:  4.9 out of 5 stars   (147 Customer Reviews)

Compact smart charger draws power from a wall outlet to charge and maintain batteries on cars, RVs, boats, motorcycles, ATVs, snowmobiles and lawn mowers. Force mode revives dead batteries. Charges lead-acid and lithium-ion batteries.


Excellent trickle charger. Used several times to keep our stored car battery fully charged. We have left it on the charger for 4 months with great results.


For over a year now this little NOCO charger has kept the starting battery ready to go on our diesel backup generator. Before the NOCO we had to jump start it almost every time.


works fine,just wish i understood how it desulfonates better


Great equipment. Robust construction so it will last. Does agreed job of keeping camping trailer charged.


Having used THE NOCO Genius2 battery charger for greater than 1 years, I can say that I am completely satisfied with form and function of the device. I use the charger to maintain fresh battery charge for my RV trailer. I like the compact, portability and weight of the unit. The indicator lights keep me informed of the battery charge status. I consider this purchase as one of my best purchases of all my RV gear. Thanks for an excellent product.


Works as advertised. Quality product, simple operation. Especially like how the system remembers the last battery type setting for each of the 4 banks of chargers. I bought several more Noco chargers after this one.


Because of great demands on marine batteries these days with electronics and trolling motors, it is important to maintain their voltages when not in use. The Noco Genius Smart Battery Charger-2 amp not only charges the battery back up but also maintains it so you are always ready to go. Built for marine conditions this little charger takes up miniumum space and is easy to use with nicely made gator clips and a long detachable cord making connecting time a snap. Bright LED lights let you know where this trickle charger is in the cycle and flashes a green light when done and in maintenance mode. The instruction booklet is helpful but use a magnifier to catch all the details in the fine print. Everyone needs this little device to keep 12 volt batteries fresh and ready to go and e-Trailer has one for your car or recreational need!


I bought two of the Noco 2 amp battery maintainers and am pleased with both. Using them outside in a dry location to maintain car batteries. Convenient connect/disconnect and easy to read and understand status LEDs.


Already used it, Great product and serv ice


Just added this one to my “fleet” of NOCO chargers, has kept my group of Antique tractor 6 volt batteries alive for several years instead of replacing them almost every year. I don’t and won’t own anything else! They are the best!


Very good quality, this is the fourth one I own, highly recommended



Good,but it does boil off battery fluid on my Yuasa battery. I have the charger on a timer to operate once a week for 3 hours to keep the batteries topped up, without fluid loss.


Good service and timely delivery.


When I got the charger the switch wasn't working so I contacted customer service and a new unit was shipped right away. Got my new one hooked up and it's working great. Great service!


David O.


Best thing we ever did








Great charger does everything I expected from charging my batteries


Great product used from previous purchase, no damage to batterys, very well packaged, prompt delivery.


Great product. Had 1 b4 that worked well. Had bought different brands b4 but ruined my battery. Delivered on time, packaged very well cost less than other sellers


Good price,fast shipping,great product.


The NOCO Genius 10 is a solid, well-built product that is compact and easy to use. We are using it as a battery maintainer/trickle charger via the cigarette lighter adapter. Very pleased with this purchase!

Show More Reviews

See what our Experts say about this NOCO Battery Charger

  • Smart Battery Charger for Keeping Two 6V Batteries Charged While in Storage
    You will not have any issues using the NOCO Genius Smart Battery Charger item # 329-GENIUS2D to keep your Airstream batteries topped off in storage. I haven't heard of any of the issues you are describing. The Genius smart charger has LED indicators that will alert you of any issues with your batteries that would cause the charger to not function correctly. Since you are charging two 6v batteries I recommend using the NOCO Genius Smart Battery Charger item # 329-GENIUS2. This system is...
    view full answer...
  • What Does Red Flashing Light Mean on Noco Genius2
    It sounds like you have a Genius2 just like the # 329-GENIUS2. Just like the Genius1, there is a red pulsing light when the battery is below a certain percent. In this case it is either under 50% or under 25% based on where the light is located. See the attached image below.
    view full answer...
    Image 1 for
  • What Does A Pulsing Orange Light Mean On A NOCO Genius Battery Charger
    An orange light on the NOCO Genius Smart Battery Charger # 329-GENIUS1 indicates the charger is in standby mode. This should be a solid orange light. Nowhere in the instructions does it mention a pulsing orange light for this particular model. For the NOCO Genius2 # 329-GENIUS2, the pulsing orange light just means the battery is less than 75% charged. You simply need to let the battery keep charging until you see a pulsing green light, indicating bulk charging is complete.
    view full answer...
  • Do battery Cables Need To Be Disconnected When Using A NOCO Battery Charger
    No, you do not need to disconnect the trailers battery cables in order to install a NOCO battery charger like the # 329-GENIUS2. You just connect the red clamp to the positive terminal, then connect the black to the negative terminal or on the campers frame. The charger can be installed and left connected to the battery at all times to provide maintenance charging.
    view full answer...
  • Could NOCO Genius Smart Battery Charger # 329-GENIUS2 be Left on Vehicle
    The NOCO Genius Smart Battery Charger # 329-GENIUS2 has a quick release harness that you could leave on the battery easier than trying to mount the entire unit on the vehicle.
    view full answer...
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  • Battery Charger Recommendation to Keep Battery of Truck Topped Off in Storage
    The NOCO Genius charger part # 329-GENIUS2 that you referenced would perfectly for this. It is a 2 amp charger that once the battery is fully charged will switch to a lighter charge to maintain it when stored so that when you need to use the truck it is ready to go.
    view full answer...
  • Can I Use The NOCO Genius Smart Battery Charger # 329-GENIUS2D With A 64 Ah Battery
    The NOCO Genius Smart Battery Charger # 329-GENIUS2D is not going to work well with a 64 Ah battery. While technically it will be safe to hook up and use, it will take a very long time for the charger to fully charge your battery. Even for long term maintenance charging, this would not work well. We do recommend upgrading to a different charger like the # 329-GENIUS5, which will work with 12v batteries up to 120 Ah.
    view full answer...
  • Recommended Battery Charger for Harley Davidson Softail Heritage
    Greetings, If you were looking for something that would work great to keep your Harley's battery topped off while being stored over the winter the Noco Genius part # 329-GENIUS2D is the best option as it's a 2 amp charger that's priced really great and will work well for that purpose. If you were looking for something with a higher amperage rating that will charge a dead battery quicker and can maintain a charged battery through storage the part # 329-GENIUS10 is the best option. This...
    view full answer...
    Image 1 for
  • Recommended Battery Charger for Trailer with Two Deep Cycle Batteries
    The NOCO Genius Mini On-Board Battery Charger part # 329-GENM2 is an excellent option to not only charge two batteries but also keep them charged while in storage. This system connects to each battery so you'll get the fastest and most effective charge possible. That said, this battery charger is for use with 12 volt batteries only. If you have 6 volt batteries you will want to use two of the NOCO Genius Smart Battery Charger part # 329-GENIUS2 instead.
    view full answer...
  • Can Powerhouse TC2 2-Amp Trickle Charger Be Used for 12V Car/Camper Battery
    The NOCO Genius Smart Battery Charger # 329-GENIUS2D is suitable for 12V batteries rated up to 40 amp-hours so if the 12V battery on your camper is rated for 40 amp-hours or less, you can use it. However, most standard sized 12V batteries are going to be rated for higher than that. This particular charger has a maximum output of just 2 amps so it's going to take a really long time (if ever) to charge up a full size 12V battery if it's anything less than fully charged when hooking it up....
    view full answer...
  • Would Dead Breakaway Battery Throw Code for OEM Brake Controller on 2018 Chevy Silverado
    I don't think a dead breakaway battery would cause an error message to pop up, but that is something that would need to be addressed anyways with a charger like the NOCO Genius Smart Battery Charger - AC to DC - 12V - 2 Amp # 329-GENIUS2D or by replacing the entire breakaway kit (see attached link). Once the battery is charged up or you have replaced it that will let you know if the dead battery was for some reason throwing a code or not. If you are stilling having that code pop up then...
    view full answer...
  • Will NOCO Genius Smart Battery Charger Work with 24 Volt Batteries
    The NOCO Genius Smart Battery Charger part # 329-GENIUS2 is not rated for use with 24 volt batteries. In order to charge both 12 volt and 24 volt batteries you would need a different charger like the OptiMate 6 Smart Battery Charger part # MA84JR.
    view full answer...
  • Can NOCO Genius Smart Battery Charger # 329-GENIUS2D be Used with Dual Outlet Adapter
    The NOCO Genius Smart Battery Charger # 329-GENIUS2D that you referenced is designed to plug into an AC outlet and give you a way to charge batteries. If you had it plugged into the NOCO AC Port Plug with Dual Extension Cords # 329-GCP2 at same time you'd be able to use same power outlet to power the accessories you mentioned as well as still use the charger.
    view full answer...
  • Recommended Battery Wall Charger for Two 6V Batteries on RV
    You could technically use the NOCO Genius Smart Battery Charger # 329-GENIUS2D for the battery bank on your RV but I recommend using a 2-bank charger like the NOCO Genius Multi-Bank # NOC24FR instead. Reason being that sometimes more cost-effective chargers like this can get tricked into thinking the battery bank is in a good place when that first battery reaches full charge. With the 2-bank setup you will be charging the batteries separately so you know they will each be getting the best...
    view full answer...
  • Electric Winch and Battery Charger for Boat Trailer
    So there isn't a recommended size of battery because you'll be using a 12 volt, and there isn't going to be enough difference (in terms of size) that will matter in regards to using one over the other. I also wanted to point out that batteries do not charge from your 7-way, they only get maintained, so to charge a 12 volt battery you will need a separate charger, the NOCO Genius Smart Battery Charger # 329-GENIUS2. Then for an electric winch Dutton-Lainson TW4000 StrongArm Electric Winch...
    view full answer...
  • How to Activate Reverse Lockout on Boat Trailer When Moving it By Hand with a Tow Dolly
    It sounds like you're just needing to activate the reverse light function on a standard 5-Way connector so your boat trailer actuator will use the lockout for you to move the trailer around by hand with your dolly. I don't know of any handheld 12V power sources but you should be able to use a small battery like what you find with a breakaway kit # 50-85-313 and then wire the power only to the last pin on a 5-Way like part # HM47910 to send power to the lockout function on your actuator. It...
    view full answer...
  • Wall Adapter Compatibility with 12 Volt Clearance Light
    SInce it has a single wire, it is a clearance light. You will use the mounting bracket as your ground as you stated and run 12v power to the wire. You can use a 12v marine battery connecting the negative to the bracket and the positive to the wire. If you want to install a switch like # PK34513 in line that will work well. You can use wire like the 14 Gauge Primary Wire - Yellow - per Foot # DW02412-1. If you want a converter, you can use the # 329-GENIUS2D to connect to a standard...
    view full answer...

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Info for this part was:

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Expert Research:
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Employee Kathleen M
Installed by:
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Employee Adam E
Installed by:
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Employee Chris R
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Employee Alex H
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