Smart and compact battery charger for charging fully discharged batteries up to 40 Ah. The GENIUS2D is a 2-amp direct-mount battery charger and maintenance device designed to be safely mounted close to the battery. It is suitable for all types of 12-volt lead-acid batteries, including flooded, gel, AGM, and other maintenance-free batteries.
Smart and compact battery charger for charging fully discharged batteries up to 40 Ah. The GENIUS2D is a 2-amp direct-mount battery charger and maintenance device designed to be safely mounted close to the battery. It is suitable for all types of 12-volt lead-acid batteries, including flooded, gel, AGM, and other maintenance-free batteries.
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Smart and compact battery charger for charging fully discharged batteries up to 40 Ah. The GENIUS2D is a 2-amp direct-mount battery charger and maintenance device designed to be safely mounted close to the battery. It is suitable for all types of 12-volt lead-acid batteries, including flooded, gel, AGM, and other maintenance-free batteries.
Smart and compact battery charger for charging fully discharged batteries up to 40 Ah. The GENIUS2D is a 2-amp direct-mount battery charger and maintenance device designed to be safely mounted close to the battery. It is suitable for all types of 12-volt lead-acid batteries, including flooded, gel, AGM, and other maintenance-free batteries.
Last updated at 15/05/2026 17:00:49
NOCO Genius2deu 2-Amp On-Board Charger with Direct Mounting, 12 V Battery Charger, Trickle Charger, and Battery Desulfator with Temperature
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
NOCO 2A Direct-Mount Battery Charger GENIUS2DAU
Delivery between 21–29 May $9.90
Noco GENIUS2D 12V 2A Direct-Mount Battery Charger and Maintainer - Outback Equipment Australia - Electrical Gear & Accessories
Delivery between Wed – Fri $17.13
originally posted on canadiantire.ca
Well considering it was just a small battery maintainer…. It’s trash. I hooked it up to my truck and approx 9 days in -10 it wasn’t enough maintenance to even start a good battery. I’ve been hooked it up to my Volkswagen because I had just driven it seen maybe it was not working, didn’t have time to test but was in area. Hooked up on good battery, 3 days later in -15 tried to start completely dead. These are usually good but they don’t maintain in the winter at this low of an amperage I would suggest buying a bigger size if you want it to maintain in the Canadian winters.Very disappointed as I have 10 other Nocho genius is in really wanted something small to sit and mount in the car at all times…
originally posted on canadiantire.ca
This is a very well made unit that is designed to be mounted inside your engine to maintain your battery. This is especially important when people have been driving their car less than usual and their battery goes flat due to parasitic energy draw common to all new vehicles. Just plug it in and forget it. It is very well built like all Noco chargers (this is my third). All the mounting hardware is provided. My only complaint is that the power cord is too short so you are limited to where you can place the unit. In my case I had to use the front cross member which was less than ideal because if was not easy to see the charging status indicator light. All in all I am very happy with it.
originally posted on canadiantire.ca
A lifesaver for my 19 year old mustang. It has evergrowing draw through the car’s computer which is a battery killer (common to fords of this era). Since it is no longer my daily driver, this has become a problem. This device uses the same technology as the noco I installed as a replacement battery bank charger in my boat. It takes about a week of operation to condition the battery and then it just adds charge as required. Nothing else on the market at this price preforms like this in this price range.
| IP Rating | IP65 |
NOCO Genius2deu 2-Amp On-Board Charger with Direct Mounting, 12 V Battery Charger, Trickle Charger, and Battery Desulfator with Temperature
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
NOCO 2A Direct-Mount Battery Charger GENIUS2DAU
Delivery between 21–29 May $9.90
Noco GENIUS2D 12V 2A Direct-Mount Battery Charger and Maintainer - Outback Equipment Australia - Electrical Gear & Accessories
Delivery between Wed – Fri $17.13
Well considering it was just a small battery maintainer…. It’s trash. I hooked it up to my truck and approx 9 days in -10 it wasn’t enough maintenance to even start a good battery. I’ve been hooked it up to my Volkswagen because I had just driven it seen maybe it was not working, didn’t have time to test but was in area. Hooked up on good battery, 3 days later in -15 tried to start completely dead. These are usually good but they don’t maintain in the winter at this low of an amperage I would suggest buying a bigger size if you want it to maintain in the Canadian winters.Very disappointed as I have 10 other Nocho genius is in really wanted something small to sit and mount in the car at all times…
This is a very well made unit that is designed to be mounted inside your engine to maintain your battery. This is especially important when people have been driving their car less than usual and their battery goes flat due to parasitic energy draw common to all new vehicles. Just plug it in and forget it. It is very well built like all Noco chargers (this is my third). All the mounting hardware is provided. My only complaint is that the power cord is too short so you are limited to where you can place the unit. In my case I had to use the front cross member which was less than ideal because if was not easy to see the charging status indicator light. All in all I am very happy with it.
A lifesaver for my 19 year old mustang. It has evergrowing draw through the car’s computer which is a battery killer (common to fords of this era). Since it is no longer my daily driver, this has become a problem. This device uses the same technology as the noco I installed as a replacement battery bank charger in my boat. It takes about a week of operation to condition the battery and then it just adds charge as required. Nothing else on the market at this price preforms like this in this price range.
I have a 12V AGM battery, three years old, which has taken a lot of abuse from me since I drive only 4 miles to work and take longer trips than that only once every two weeks. Lately, I was staying home because of coronavirus, and I only took my car out about once every three weeks. Needless to say, the battery died and I could not start my car. All lights were dead upon opening the car door. I got the Noco Genius2 to try it out. I was amazed at how small it was. I checked my battery with my voltmeter, and it was 1.9 V. I hooked up the Noco Genius2 and the first LED started blinking, indicating less than 25% charge. I noticed this Noco was rated for 40Ah and my car battery is 80Ah, but I read in the reviews that it should still work, just take longer. Well, I left ... MoreI have a 12V AGM battery, three years old, which has taken a lot of abuse from me since I drive only 4 miles to work and take longer trips than that only once every two weeks. Lately, I was staying home because of coronavirus, and I only took my car out about once every three weeks. Needless to say, the battery died and I could not start my car. All lights were dead upon opening the car door. I got the Noco Genius2 to try it out. I was amazed at how small it was. I checked my battery with my voltmeter, and it was 1.9 V. I hooked up the Noco Genius2 and the first LED started blinking, indicating less than 25% charge. I noticed this Noco was rated for 40Ah and my car battery is 80Ah, but I read in the reviews that it should still work, just take longer. Well, I left it on about 20 hours and the first LED never stopped blinking. I checked the battery with my voltmeter, but the voltage was jumping all over the place, so I thought maybe desulfation was taking place. Desulfation can take a long time, so I left it run overnight again and the first LED was still blinking the next day. I unhooked the Noco to take a steady battery voltage reading, and the voltage reading was 0. I was pretty disgusted at this point, thinking either the battery was unrecoverable, the recharger was defective, or maybe I had a load on the battery (like leaving the headlights on, but I knew it wasn't this). I decided to unhook the ground clamp from the battery terminal to try it again. The voltage reading jumped up to 4.2 V with the ground clamp disconnected, so I didn't have to use force mode on the Noco (this is a special mode that forces recharging if the battery voltage is too low). I ran it another 20 hours, and the first LED never stopped blinking, indicating less than a 25% charge. I was ready to give up this point, so I unhooked the Noco and took a battery voltage reading -- lo and behold, it read 12.3 V. Good things were happening, but I didn't understand why the second LED wasn't flashing (indicating between 25% and 50% charge). About 5 hours later, the second LED did flash, then a couple hours after that, the third LED flashed, and then in a couple more hours, the fourth and final green LED started flashing, indicating between a 75% and 100% charge. I left It hooked up over night, but the next day, the green LED didn't stop flashing. I ran it another day, and the next morning, the green LED was still flashing. According to the instruction manual, it turns sold when 100% charged. I disconnected the Noco at that point and took a voltage reading -- it was 13.3 V. Not super fantastic, but above 12.6 V, where I could start the car. While the ground clamp was disconnected from the battery terminal, I took an amp reading and it was drawing only 13 mA, well below the 50 mA that I would start worrying about. I hooked up the ground clamp and was able to start my car, and I think the battery is fine now. I was really impressed at the Noco's ability to revive a battery that apparently was in pretty sorry shape. I think the instruction manual should say to disconnect the battery if the voltage is too low -- it certainly seemed to help in recharging. Also, if you need a faster charge, don't get the Genius2 -- get a Genius5 or a Genius10. In my case, I didn't care if it took two weeks because I wasn't going anywhere. And if you're staying home from coronavirus, drive your car once in a while. Now that I have the Noco, though, I can just leave it hooked up.
I have a vehicle that doesn't get driven much, sometimes sits for weeks at a time. I was constantly dealing with no-start situations when I went to drive it. I considered a traditional trickle charger but wanted something that I didn't have to hook up and unhook from the battery all the time. I also wanted to avoid having a trickle charger unit sitting on the garage floor or somewhere near the vehicle all the time. This onboard charger is the perfect solution. The unit works automatically, keeping the battery charged and going into ""standby"" mode automatically when the battery reaches full charge. A light on the outside of the unit lets you know the charging status. Installation was not a major obstacle, but does require that you have a spot under your hood near ... MoreI have a vehicle that doesn't get driven much, sometimes sits for weeks at a time. I was constantly dealing with no-start situations when I went to drive it. I considered a traditional trickle charger but wanted something that I didn't have to hook up and unhook from the battery all the time. I also wanted to avoid having a trickle charger unit sitting on the garage floor or somewhere near the vehicle all the time. This onboard charger is the perfect solution. The unit works automatically, keeping the battery charged and going into ""standby"" mode automatically when the battery reaches full charge. A light on the outside of the unit lets you know the charging status. Installation was not a major obstacle, but does require that you have a spot under your hood near the battery to mount the unit securely. For my installation I had to remove the battery and drill a couple of holes in the side wall of the engine compartment, and route the power cord out through the front wheel well. A little bit of work, but a nice install solution that now allows me to plug the unit in with an extension cord without having to even pop the hood. I recommend that anyone considering this unit first examine under the hood of their vehicle to make sure there's a good place to mount the unit close enough to the battery to connect the wiring and to run the power cord. And of course you want to keep the wires away from moving parts -- fan belts, etc. If you have a vehicle that needs to get charged regularly, I highly recommend this unit.
Nifty solution for cars not driven often or far, or with a large parasitic drain. Keeps the battery fully charged and in pristine health, which will reduce the likelihood of permanent damage to the battery due to a deep discharge or freezing. After successfully trying it on a problem car, I ended up being happy enough I bought another one for our second car.As noted in specs, the 2 ft cord and leads can make positioning a bit of a challenge (and don’t forget to take the bulky positive fuse into consideration if your battery has a cover) and the unit WILL stop charging at -20°C. So it isn’t perfect for the colder parts of winter unless you have a garage that you keep above that temp.The power output isn’t that high, and again, as listed in the specs, it is only ... MoreNifty solution for cars not driven often or far, or with a large parasitic drain. Keeps the battery fully charged and in pristine health, which will reduce the likelihood of permanent damage to the battery due to a deep discharge or freezing. After successfully trying it on a problem car, I ended up being happy enough I bought another one for our second car.As noted in specs, the 2 ft cord and leads can make positioning a bit of a challenge (and don’t forget to take the bulky positive fuse into consideration if your battery has a cover) and the unit WILL stop charging at -20°C. So it isn’t perfect for the colder parts of winter unless you have a garage that you keep above that temp.The power output isn’t that high, and again, as listed in the specs, it is only rated for up to 40 amp hour batteries, so expect it to take a loooong time to get to solid green the first time you use it, especially if you have a parasitic draw or a larger vehicle or possibly a battery with higher CCAs (if amp hours are not listed). Mine took days, but now it gets to solid green overnight.No issues with brittle cords so far, but I installed it in a warm environment and am hoping that having it tightly secured and cable managed and not manipulated in weather below -20 will prevent that.Overall, if you don’t expect it to do things it’s not made to do, you should be happy. If any of the pain points listed (other than not charging below -20) are dealbreakers for you, pay twice as much and get the 5 amp GEN5X1.
Mounted this charger to the passenger side radiator support of my 2006 F350 6.0L Powerstroke. I use it to keep the batteries topped up and ready to fire up this beast of an engine. There has always been a bit of a phantom draw that I have never been able to track down but may be part of either the anti-theft system or dashboard relays. Either way this takes care of keeping the batteries topped up. Love that it's built in and only requires an extension cord to hook it up.
My parents 2015 Lincoln MXC is not driven daily, and at times can sit for a week or so before they need to use it. They are 94/84 years young and while they still drive, dealing with a dead battery and boosting is a bit much for them these days. Instead of me driving 20 minutes to boost them, or worrying they their battery might be die when they are out or, be dead when they really need the car I started looking at battery tenders and boosters. I 1st bought a 2,000 amp booster pack, but it would not actually boost their car (tested a more powerful booster and it worked, but figured this also was too much work for my parents). So, after research I found the Noco Genius2D onboard charger/maintainer that you can install right under the hood, you have the plug in cord ... MoreMy parents 2015 Lincoln MXC is not driven daily, and at times can sit for a week or so before they need to use it. They are 94/84 years young and while they still drive, dealing with a dead battery and boosting is a bit much for them these days. Instead of me driving 20 minutes to boost them, or worrying they their battery might be die when they are out or, be dead when they really need the car I started looking at battery tenders and boosters. I 1st bought a 2,000 amp booster pack, but it would not actually boost their car (tested a more powerful booster and it worked, but figured this also was too much work for my parents). So, after research I found the Noco Genius2D onboard charger/maintainer that you can install right under the hood, you have the plug in cord hang out the front grill (I used zip ties to ensure it doesn't move) and when you get home you plug it in and leave it plugged in. Red light means its charging, green light means its ready to roll. For my parents, its the easiest solution to ensure their car always starts no mater how long it sits in the garage. I also zip tied the extension cord they use to plug in the car, to the workbench so in the case they do forget to unplug it, the connection should pull apart, without pulling the cord out of the front grill and, the extension cord out from the wall so they dont drag it down the street. Its been a 3 or so weeks now, and its doing its job! I Highly recommend this product.
Updated on 9/26/2021: I recently bought AXTRA car battery charger maintainer, and it works well for 6 volt and 12 volts AGM batteries. Price is better than NOCO 2. However, the portability with NOCO is better. I don’t need to carry this car battery to travel so size doesn’t matter at all. I attached a few pictures to compare them side by side. Both car battery charger are great to maintain 12 volt battery. NOCO battery charger fully charged my car battery. I parked my car at my front yard during quarantine and the battery was very low so I used it to charge the battery. Too bad the power cord couldn’t reach to an AC outlet from the house so that I have to use with 9 food long cord AXTRA power strip to deal with the battery charger. This unit simply makes the charger ... MoreUpdated on 9/26/2021: I recently bought AXTRA car battery charger maintainer, and it works well for 6 volt and 12 volts AGM batteries. Price is better than NOCO 2. However, the portability with NOCO is better. I don’t need to carry this car battery to travel so size doesn’t matter at all. I attached a few pictures to compare them side by side. Both car battery charger are great to maintain 12 volt battery. NOCO battery charger fully charged my car battery. I parked my car at my front yard during quarantine and the battery was very low so I used it to charge the battery. Too bad the power cord couldn’t reach to an AC outlet from the house so that I have to use with 9 food long cord AXTRA power strip to deal with the battery charger. This unit simply makes the charger itself sit nicely under the hood with included mounting strap. NOCO battery charger and maintainer combo come in at a budget price with some advanced, smart features to protect the battery, your vehicle and possibly yourself. As a result, this is a good maintainer option to consider if you want something that takes away the danger and challenge of bringing an automotive battery back from the dead. Its portable size also makes it a great option to bring around on trips. The 2-Amp battery charger and maintainer that works with all types of 6- and 12-volt lead-acid batteries. This versatile all-in-one battery charger and maintainer is ideal for keeping your vehicles fully charged and maintained all year long, especially during long-term storage. It’s extremely easy to use as well, simply plug it in and let the NOCO will automatically monitor and maintain your car’s battery. The optimized charge mode is designed to safely charge your battery, using advanced charging technology to monitor and maintain your battery. It’s safe to leave this plugged in and maintaining your battery all year round, as the onboard microcomputer will minimize energy consumption. The rubberized base is designed to both avoid slipping, and protect any surface the battery maintainer is sitting on from being scratched. In addition, this product offers an advanced desulfator repair mode that can help reverse the damaging effects when a battery is left uncharged for an extended period of time. Safety features include sparkproof technology and reverse polarity protection. Force mode feature is awesome to detect low voltage on a battery to start recover process. Usually a low voltage battery would be 1V-4V. Noco claims the charger can charge a dead battery as low as 1-volt. To access force mode, please ensure the charger is connected to AC outlet, press and hold the mode button approximately 7 seconds.
| IP Rating | IP65 |
