Manufacturer | NOCO |
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Place of Business | KITCHENER, ON, N2G 4J1 CA |
Brand | NOCO |
Model | GENIUS2 |
Product Dimensions | 4.32 x 6.1 x 9.4 cm; 557.92 g |
Item model number | GENIUS2 |
Is discontinued by manufacturer | No |
Exterior | Machined |
Manufacturer part number | GENIUS2 |
Special features | Battery Charger For Cars, Motorcycles, ATV, And Lawnmowers, Battery Maintainer, Trickle Charger And Battery Desulfator, Force Mode For Manual Battery Charging, IP65 Ingress Protection, Spark-Proof and Reverse Polarity Protection, Temperature Compensation For Accurate Recharging |
Item Weight | 558 g |
Country of origin | USA |
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NOCO GENIUS2: 2A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries
Purchase options and add-ons
Brand | NOCO |
Colour | Black |
Product Dimensions | 10.8D x 8.7W x 17.7H Centimetres |
Item weight | 1.23 Pounds |
Output voltage | 12 Volts |
Specification met | CSA, FCC, UL |
Input voltage | 120 Volts |
Charging time | 40 Hours |
Current rating | 2 Amps |
EU Spare Part Availability Duration | 3 Years |
About this item
- MEET THE GENIUS2 — Similar to our G1100, just better. It's 30% smaller and delivers over 140% 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 2A 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.
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Top Brand: NOCO
From the brand

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Established in 1914, NOCO designs and creates premium consumer battery chargers, jump starters, lithium batteries, and a wide range of accessories. Through these world-class offerings, we have effectively set a new standard in design, performance, and safety. We aim to make exceptional products that provide consumers with the ultimate experience. We challenge conventionality and remain vigilant to the highest quality standards. We are NOCO.
From the manufacturer

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Customer Reviews
|
4.6 out of 5 stars 16,643
|
4.6 out of 5 stars 54,591
|
4.7 out of 5 stars 18,595
|
4.6 out of 5 stars 18,547
|
Charging Current
| 2 Amps | 1 Amp | 5 Amps | 10 Amps |
Battery Capacity
| 40Ah | 30Ah | 120Ah | 230Ah |
Output Power
| 30W | 15W | 75W | 150W |
12V Repair Mode
| ✘ | ✘ | ✔ | ✔ |
12V Supply Mode
| ✘ | ✘ | ✘ | ✔ |
6V AGM Mode
| ✘ | ✘ | ✘ | ✔ |
Product description
The GENIUS2 is the ultimate all-in-one solution for battery charging, maintenance, and restoration, delivering 30% more power in a 140% smaller design compared to its predecessor, the G1100. Designed for 6-volt and 12-volt lead-acid (AGM, gel, flooded, and deep-cycle) and lithium-ion (LiFePO4) batteries (up to 40 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 GENIUS2 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 GENIUS2 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 2A 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 GENIUS2 combines power, reliability, and convenience in a compact design to keep your batteries ready for whatever lies ahead.
Product information
Technical Details
Additional Information
ASIN | B07W6B987F |
---|---|
Customer Reviews |
4.6 out of 5 stars |
鶹 Rank |
|
Date First Available | Nov. 19 2019 |
Feedback
Customer reviews
Customers say
Customers like the functionality, charging speed, and quality of the battery charger. They mention it works great on all their 12V batteries, selects the correct charging rate, and is easy to use. Customers also appreciate the compact size, portability, and design.
AI Generated from the text of customer reviews
Customers like the functionality of the battery charger. They mention it works great on all their 12V batteries and is a tiny little unit with flexible attachment options.
"Works great and small in size" Read more
"works great" Read more
"Works well!" Read more
"Works as advertised. Did some homework and this is the battery maintainer to buy. Hook it up and forget it. Wish I had bought it sooner." Read more
Customers like the charging speed of the battery charger. They mention it quickly charges and maintains car, motorcycle, and lawn equipment batteries. Some say it selects the correct charging rate to top-up the battery. They also say it triple charges their other vehicle batteries.
"Great little charger , maintainer. Covers a wide range of battery types and conditions them as well...." Read more
"Fast and oem" Read more
"small take longer to charge good lights nice to see green light when battery is good" Read more
"Great charger..." Read more
Customers are satisfied with the quality of the battery charger. They mention it's a great little unit and reliable.
"Great product made in america" Read more
"Excellent product. Great price point would buy again" Read more
"...Just make sure it’s charged up. Good product." Read more
"Easy to use ! Good quality !" Read more
Customers find the battery charger easy to use. They mention the instructions are clear and straightforward, ensuring a hassle-free experience. They also say it's easy to connect and works seamlessly without any tinkering. Customers also appreciate the leads that can be disconnected quickly without disturbing the charger.
"...This unit is a lifesaver when your car battery is dead. Easy to use, charge and store...." Read more
"...Like I said, this charger is easy to use, cost effective and most importantly, it works! I STRONGLY RECOMMEND." Read more
"Very easy to use; lights on recharger are easy to understand. Gave me a chance to clean off battery connectors when removing cables...." Read more
"...This little trickle charger is perfect. It is very easy to use and you don't have to worry about overcharging so you can leave it hooked up for days..." Read more
Customers like the battery life of the product. They mention it keeps their batteries charged and maintained at -30 degrees Celsius. They say it's perfect for maintaining batteries year-round and a lifesaver when their car battery is dead. Customers also say it shuts off when the battery is full and turns on when it's depleted.
"Great battery maintainer..." Read more
"This thing has completely revived an old dead atv battery, very impressive . I always have it connected to something. Wish I bought it long ago." Read more
"...I can leave it on the battery even when it's not charging, and it doesn't draw amps...." Read more
"Works great, my battery was dead and boosting it with an external battery would not get it to start...." Read more
Customers like the compact size of the battery charger. They mention it's small enough to keep permanently under the hood with provided clips.
"...Noco Pros: compact, lights are very bright easy to read, simple system to use, trust the technology. Not afraid to leave it on indefinitely." Read more
"Small and fast" Read more
"...It's small and lightweight, making it incredibly convenient for storage and handling. Setting it up was a breeze...." Read more
"Compact and powerfull..." Read more
Customers like the portability of the battery charger. They mention it's incredibly convenient for storage and handling, great for cars in storage, and appropriate for storing motorcycle batteries. Customers also say it's nice to have as a backup in case of leaving the door open again.
"...Build quality feels great, and very compact and light. Definitely my go-to from now on" Read more
"This device is impressive. It is small, light weight, and it works very well...." Read more
"...It's small and lightweight, making it incredibly convenient for storage and handling. Setting it up was a breeze...." Read more
"...The unit is nice and small as well and easy to store" Read more
Customers like the design of the battery charger. They mention it's well-designed, looks great, and is a good product at glance. Customers also say it's a great gift for winterizing batteries.
"I like this charger, it's nice and small and the clamps have plastic on them so you won't accidently touch them together when you take it off a..." Read more
"This thing has completely revived an old dead atv battery, very impressive . I always have it connected to something. Wish I bought it long ago." Read more
"This charger worked great at a reasonable price. The unit is nice and small as well and easy to store" Read more
"Bought this based on rep, on sale and its a really awesome unit! Well built, nice quality cables, and charges smart which was a bonus...." Read more
Reviews with images

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Top reviews from Canada
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- Reviewed in Canada on June 15, 2025Verified PurchaseGreat tiny little unit with flexible attachment options. This is a peace of mind purchase and a no brainer. I use it primarily to maintain a motorcycle battery which it does quickly and without any tinkering.
Even includes a handy little mount with strap
Great tiny little unit with flexible attachment options. This is a peace of mind purchase and a no brainer. I use it primarily to maintain a motorcycle battery which it does quickly and without any tinkering.
Even includes a handy little mount with strap
Images in this review
- Reviewed in Canada on June 23, 2025Verified PurchaseHad previously bought cheap versions of these and they did not last and I believe fried a couple batteries! Not worth saving 20.00 on a charger and then having it destroy a 300.00 battery!
Noco Pros: compact, lights are very bright easy to read, simple system to use, trust the technology. Not afraid to leave it on indefinitely.
- Reviewed in Canada on July 5, 2025Verified PurchaseWorks great and small in size
- Reviewed in Canada on August 2, 2023Verified PurchaseI had a Noco battery product years ago. Not impressive. The company seems to have picked up its game. This thing is simple, and seems reliable, at a good price point. NOTE: I do not trust "leave it on charge all winter and it will work automatically". Not for ANY of these chargers. I charge my batteries up. Then uncouple the tender, then recharge in a few weeks. This avoids having to trust little micro circuits somewhere in a black box - that may of may not work flawlessly month after month without checking.
- Reviewed in Canada on August 1, 2025Verified PurchaseThis thing has completely revived an old dead atv battery, very impressive . I always have it connected to something. Wish I bought it long ago.
- Reviewed in Canada on November 16, 2023Verified PurchaseI recently purchased the GENIUS2 and I must say, it has completely exceeded my expectations. Right out of the box, the first thing that struck me was its compact design. It's small and lightweight, making it incredibly convenient for storage and handling.
Setting it up was a breeze. The instructions were clear and straightforward, ensuring a hassle-free experience even for someone who isn't particularly tech-savvy. This ease of setup is a huge plus, especially in emergency situations where time and simplicity are of the essence. Simply connect your battery and turn the device on, click the button to select the correct mode and you're good to go!
The fact that it works as expected without any complications adds a level of trust and reliability that I greatly appreciate.
Additionally, the packaging was well-thought-out and secure, protecting the charger during shipping. This attention to detail extends to the charger itself, which has a premium feel to it. The build quality is excellent – it doesn’t feel flimsy or cheap, which is often a concern with tech products.
Overall, the NOCO GENIUS2 is an outstanding product that I would highly recommend. Its combination of compact size, ease of use, efficient performance, and premium build quality makes it a top-notch choice for anyone in need of a reliable car battery charger.
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Reviewed in Canada on August 6, 2025Verified PurchaseNous l'avons acheté pour charger la batterie de la moto des enfants. Fonctionne bien. Nous avons des enfants heureux!
- Reviewed in Canada on July 17, 2025Verified PurchaseExcellent product. Great price point would buy again
Top reviews from other countries
- David PerezReviewed in the United States on April 22, 2025
5.0 out of 5 stars Highly recommended for old batteries.
Verified PurchaseI would go through the problem of not having to use my car for long periods of time which would ultimately drain my battery. I would suffer through by using a portable jumper, but the problematic battery would persist. I started investigating in alternatives like unplugging the battery from the car while it is not in use, but I would still have to get a new battery regardless. I luckily stumbled into this product that changed the game entirely.
My battery was absolutely drained and would not even crank the starter motor. I got this product and set it up using the instructions and it charged up right away. It was very practical to use with ease. All that is needed is to latch on to the terminals in the appropriate order, plug it in, and in the push of a button it revives the battery. I was able to recharge my battery back to 100% over time and it starts without a hitch. I would just leave my battery connected to this product and check up on it every once in a while. Very simple, very effective. Highly recommended.
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AMASReviewed in Saudi Arabia on September 7, 2022
5.0 out of 5 stars نوكو غني عن التعريف
Verified Purchaseانصح بها
-
okar LBReviewed in Mexico on February 10, 2021
5.0 out of 5 stars Excelente cargador muy versátil
Verified PurchaseHay mucho que considerar al cargar una batería de auto, éste cargador es ideal para varios escenarios. Lo compré pues muchos autos nuevos con baterías AGM no deben ser cargados con un cargador que no diga expresamente ser para AGM, de otra forma puede acortar su vida.
Este cargador puede usarse con baterías regulares de plomo-acido, AGM, litio y hasta de 6V. Tiene indicadores para polaridad invertida, batería dañada, además de nivel de carga en 4 niveles. En ésta versión de 2 amperes (Noco Genius 2) una batería que marque el primer nivel puede tomar mas de un día en cargar, pero lo hará extendiendo lo mas posible la vida de la misma.
Para autos que no se utilizan mucho, es indispensable un cargador como éste, de lo contrario la batería se puede dañar por la falta de carga, así se arranque el motor cada mes, pues no es suficiente, particularmente para las de plomo-acido. Incluso autos que solo se usan para trayectos cortos dos o tres veces por semana, la carga que obtienen no es suficiente y terminan descargandose y dañandose si no se hace algo al respecto.
Por el tipo de carga que generan éstos cargadores, se pueden recuperar hasta cierto punto baterías que ya fueron indebidamente descargadas mas allá de lo recomendado. Las AGM son las que pueden resistir mas, una de plomo tal vez no se recupere al 100% pero se puede extender un poco su vida. El hecho de que cargue lentamente es precisamente para extender la vida de las baterías y mantener cargadas las que no se usan. Si requieres un arrancador o una carga rápida, ésto no es el producto que necesitas. Las cargas rápidas terminan disminuyendo la vida útil de cualquier batería.
Es un producto excelente para museos y colecciones de autos, garantizando que autos sin mucho uso estén siempre listos y que las baterías no pierdan su vida útil. Se puede comprar el accesorio para conectar permanentemente a la batería y dejar el conector tapado pero accesible para rotar el mismo cargador entre varios autos, dejandolo un par de días en cada auto.
Yo lo compré para un auto que casi no uso y como tiene batería AGM, no podía usar mi cargador/mantenedor viejo. Lo recomiendo bastante, luego de una carga se puede desconectar y permanecer meses sin usar y arranca a la primera, aunque lo ideal es dejarlo siempre conectado si es posible. Cuando ya está cargada, se mantiene en modo de espera.
okar LBExcelente cargador muy versátil
Reviewed in Mexico on February 10, 2021
Este cargador puede usarse con baterías regulares de plomo-acido, AGM, litio y hasta de 6V. Tiene indicadores para polaridad invertida, batería dañada, además de nivel de carga en 4 niveles. En ésta versión de 2 amperes (Noco Genius 2) una batería que marque el primer nivel puede tomar mas de un día en cargar, pero lo hará extendiendo lo mas posible la vida de la misma.
Para autos que no se utilizan mucho, es indispensable un cargador como éste, de lo contrario la batería se puede dañar por la falta de carga, así se arranque el motor cada mes, pues no es suficiente, particularmente para las de plomo-acido. Incluso autos que solo se usan para trayectos cortos dos o tres veces por semana, la carga que obtienen no es suficiente y terminan descargandose y dañandose si no se hace algo al respecto.
Por el tipo de carga que generan éstos cargadores, se pueden recuperar hasta cierto punto baterías que ya fueron indebidamente descargadas mas allá de lo recomendado. Las AGM son las que pueden resistir mas, una de plomo tal vez no se recupere al 100% pero se puede extender un poco su vida. El hecho de que cargue lentamente es precisamente para extender la vida de las baterías y mantener cargadas las que no se usan. Si requieres un arrancador o una carga rápida, ésto no es el producto que necesitas. Las cargas rápidas terminan disminuyendo la vida útil de cualquier batería.
Es un producto excelente para museos y colecciones de autos, garantizando que autos sin mucho uso estén siempre listos y que las baterías no pierdan su vida útil. Se puede comprar el accesorio para conectar permanentemente a la batería y dejar el conector tapado pero accesible para rotar el mismo cargador entre varios autos, dejandolo un par de días en cada auto.
Yo lo compré para un auto que casi no uso y como tiene batería AGM, no podía usar mi cargador/mantenedor viejo. Lo recomiendo bastante, luego de una carga se puede desconectar y permanecer meses sin usar y arranca a la primera, aunque lo ideal es dejarlo siempre conectado si es posible. Cuando ya está cargada, se mantiene en modo de espera.
Images in this review
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KarimReviewed in Mexico on June 17, 2025
5.0 out of 5 stars Buena opción y confiable.
Verified PurchaseBuena relación precio calidad, se siente robusto y no se calienta, muy útil para mantener baterías de autos parados en buen estado, normalmente no demora más de 4hrs en cargar una batería que ah estado una semana sin arrancar.
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Product Summary: NOCO GENIUS2: 2A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries
From NOCO
About this Item
- MEET THE GENIUS2 — Similar to our G1100, just better. It's 30% smaller and delivers over 140% 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 2A 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.
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