bing tracking image
  1. Battery Charger
  2. NOCO
  3. ATV
  4. Boat
  5. Car/Truck/SUV
  6. Generator
  7. Jet Ski
  8. Lawn Mower
  9. Motorcycle
  10. RV/Camper
  11. Snowmobile
  12. Trolling Motor
NOCO Genius Smart Battery Charger - AC to DC - 6V/12V - 2 Amp

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

Item # 329-GENIUS2
Our Price: $49.95
You Save: 35%
Battery Charger
Orders above $50 qualify for Free Shipping
Shipping Weight: 1.42 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
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. 1-636-306-4830 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.
  • All Info
  • Reviews (125)
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

NOCO Battery Charger - 329-GENIUS2

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

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

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

California residents: click here

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of NOCO Battery Chargers - Battery Charger - 329-GENIUS2

Hey everyone, I'm Ellen here at and today we're taking a look at the NOCO genius battery charger and maintainer. This is going to help us keep our batteries charged and ready to go whenever we are to go out on our adventure, get some work done around the house, or whatever the case might be. It's going to allow us to charge and maintain the batteries for 6V and 12V batteries have a lot of different types, we'll go over those in a minute, but it's going to be just as nice compact systems. You can mount this to the wall, keep it in a drawer or your toolbox anywhere close at hand, to make sure that those batteries are maintained and ready to go. Just plugs into the wall AC plug there nothing too fantastic or special about that. On either end here, we'll have the connections to get our accessory plugged in.A lot of the NOCO staff will use the same plug so you can kind of reuse and switch and swap them out, then our little alligator clamp is going to go on the battery terminals.

Pretty common you see these on just about any kind of jumper cable or anything like that, red goes positive, black goes to the ground or negative. We do have a little keeper, this is going to mount to the wall or somewhere safe at hand, maybe the side of your toolbox to keep this nice and up out of the way, basically just wraps around the body of the charger kind of snaps in place, so you can keep that up and ready to go. And see that snaps around there can put the hook a little strap around and now hanging it against the wall does come with two small screws to attach that bracket to the wall, so you can have it wherever you want it.As far as what this will work with, as I mentioned, a lot of different battery types, 12V and 6V, got wet cell, gel cell, in advanced are enhanced flooded, maintenance-free AGM and lithium.So just about any small vehicle, you have tools, things like that, that you need to charge up with this. You can do that. Even if that battery is completely depleted, you can put this into force mode and then that will bring that battery back to life, even if it's down to zero volts.

So that's a pretty nice thing. The way it will be able to change those modes is going to be this button here. It's a pretty nice screen to let us see what's going on with our batteries. So you can see what sort of mode you have it in. Also check the charge and swap everything out.

So easy to read, LED system there.Pretty self-explanatory as I mentioned with the clamps going around your batteries, this does have a multi-stage charging and algorithm as well, so that's going to typically charge batteries faster than the other battery chargers you see in the market about two times faster, so should get everything back up to operational quickly. It's also going to have thermal sensors, so it's going to adjust that ambient or the charging performance per the temperature, and also the housing is made out of a Lex and rexine, so it's going to be nice and rugged up to, up to the task for hanging out in the shop and maybe getting banged up a little bit without too much issue.It does have an IP 65 rating, so dust proof, and it can be splashed with water without any real adverse effects, of course, you don't really want to have any of the electrical connections anywhere near water, but the box itself should be able to stand most shop environments without any issues. Those connections here, this is going to be the X or X connect series. That's what these connections are called, has little Xs on them, so pretty easy to plug in and take apart. A lot of the NOCO staff has those, and then whenever you're not using them has a little plugs to go over them, to keep those protected.As far as the size of our charger, it's going to be about 5 inches by 3 inches and then an inch and 5'8 thick, the AC cable measures 72 inches long.

Our connector cable measures 56 inches, and then the clamps are going to have a length of 21 inches. The max charge that this is rated for the max charging amperage is going to be 2 Amps, and the max power consumption is going to be 30 Watts. That's pretty much all there is to it for this does have a 3 year limited warranty, I think this will make a great accessory to keep all those items charged up and ready to go so that you don't have to wait on getting your work done around the house or getting out on the road and enjoying your life.But that's going to do it for me, I again I'm Ellen here at, hopefully this video has helped you in deciding if this is going to be the right product for you, if not, we do have other options available here so check them out. Thanks for watching.

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   (125 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.


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.


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


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.
Ferris - 06/04/2022


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!


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.


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!


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!


Best thing we ever did
David W - 08/11/2022







Review from a similar NOCO Genius in Battery Charger

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


Review from a similar NOCO Genius in Battery Charger

Awesome little charger. I installed this permanently to the inside of my trailer for easy use.


Review from a similar NOCO Genius in Battery Charger

Excellent addition to our Scamp trailer stuff. Etrailer advice and service was excellent.

Great - everything Id hoped for
Ralph - 08/02/2022


Review from a similar NOCO Genius in Battery Charger

Great charger does everything I expected from charging my batteries


Review from a similar NOCO Genius in Battery Charger

Works as advertised. Have used it to restore a 12v lithium 100ah battery which was allowed to go well below the recommended level of discharge. The compact size is also a big plus.


Review from a similar NOCO Genius in Battery Charger

It has saved us money now that we know you can't let the battery go died. This set up is a life saver at keeping our battery charged


Review from a similar NOCO Genius in Battery Charger

This charger has served me well to keep my motorhome batteries charged.

This battery charger has been very handy to charge my trolling motor for my kayak.
Andy S - 04/30/2022


Review from a similar NOCO Genius in Battery Charger

Great packaging. Works fantastic. Very easy to follow instructions.


Review from a similar NOCO Genius in Battery Charger

Great packaging. Works fantastic. Very easy to follow instructions.


Review from a similar NOCO Genius in Battery Charger

Contacted about charging K2 Energy Lithium Ion marine batteries. They took the time to contact NOCO Genius chargers to get me the correct answers. NOCO said absolutely that this would be the correct charger for lithium ion marine batteries.

I am now confident that my investment of Lithium batteries will get the correct charge they require. The NOCO genius charger is lighter and smaller than my previous charger allowing more room and less weight in my boat.

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...
  • 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...
    Image 1 for
  • 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...
  • 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...
  • 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
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...

Do you have a question about this Battery Charger?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate battery charger information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Adam E
Installed by:
Adam E
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-636-306-4830