NOCO GENIUS5: 5A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries, Battery Chargers

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NOCO GENIUS5: 5A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

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Brand	NOCO
Colour	Black
Product Dimensions	8.7D x 11.7W x 20.2H Centimetres
Item weight	721 g
Output voltage	12 Volts
Specification met	CSA, UL, FCC
Input voltage	120 Volts
Charging time	120 Hours
Current rating	5 Amps
Global Trade Identification Number	00046221190045

About this item

MEET THE GENIUS5 — Similar to our G3500, just better. It's 34% smaller and delivers over 65% 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 5A 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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This item: NOCO GENIUS5: 5A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

$109.95

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NOCO GC002 X-Connect M6 Eyelet Terminal Accessory for NOCO Genius Smart Battery Chargers

$22.40

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NOCO GC009 X-Connect SAE Adapter Accessory for NOCO Genius Smart Battery Chargers

$17.99

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NOCO Genius GEN5X1: 1-Bank, 5A Onboard Battery Charger - 5A Per Bank, 12V Waterproof Marine Charger with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

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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

GENIUS5, 6V, 12V, charger, maintainer, desulfator, lead-acid batteries, 120 amp-hours, repair mode

	GENIUS5	GENIUS1	GENIUS2	GENIUS10
Customer Reviews	18,386	53,849	16,401	18,342
Charging Current	5 Amps	1 Amp	2 Amps	10 Amps
Battery Capacity	120Ah	30Ah	40Ah	230Ah
Output Power	75W	15W	30W	150W
12V Repair Mode	✔	✘	✘	✔
12V Supply Mode	✘	✘	✘	✔
6V AGM Mode	✘	✘	✘	✔

Product description

The GENIUS5 is the ultimate all-in-one solution for battery charging, maintenance, and restoration, delivering 34% more power in a 65% smaller design compared to its predecessor, the G3500. Designed for 6-volt and 12-volt lead-acid (AGM, gel, flooded, and deep-cycle) and lithium-ion (LiFePO4) batteries (up to 120 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 GENIUS5 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 GENIUS5 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 5A 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 GENIUS5 combines power, reliability, and convenience in a compact design to keep your batteries ready for whatever lies ahead.

Product information

Technical Details

Manufacturer	‎NOCO
Place of Business	‎Glenwillow, OH 44139, US
Brand	‎NOCO
Model	‎GENIUS5
Product Dimensions	‎8.71 x 11.71 x 20.19 cm; 721.21 g
Item model number	‎GENIUS5
Is discontinued by manufacturer	‎No
Exterior	‎Machined
Manufacturer part number	‎GENIUS5
Special features	‎Spark-Proof and Reverse Polarity Protection, Force Mode For Manual Battery Charging, Battery Maintainer, Trickle Charger And Battery Desulfator, Battery Charger For Cars, Motorcycles, ATV, And Lawnmowers, Temperature Compensation For Accurate Recharging, IP65 Ingress Protection
Item Weight	‎721 g
Country of origin	‎China

Additional Information

ASIN	B07W8KJH44
Customer Reviews	18,386 ratings 4.6 out of 5 stars
�鶹�� Rank	#501 in Automotive (See Top 100 in Automotive) #10 in Battery Chargers
Date First Available	Aug. 21 2019

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	This Item NOCO GENIUS5: 5A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries	Recommendations Battery Tender 3 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Fully Automatic for Cars SUVs and Trucks - Lead Acid & Lithium Battery Charger - 022-0202-COS	�� Battery Tender 4 AMP Car Battery Charger and Maintainer: Switchable 6V / 12V, Automotive Battery Charger and Maintainer for Cars, Trucks, and SUVs, Lead Acid & Lithium Battery Charger - 022-0209-BT-CA	�� NOCO GENIUSPRO25: 25A 6V/12V/24V Professional Smart Battery Charger – Maintainer, Desulfator & Power Supply with Overcharge Protection & Thermal Compensation – for Lead-Acid & Lithium Batteries	�� NOCO GENIUSPRO50: 50A 6V/12V/24V Professional Smart Battery Charger – Maintainer, Desulfator & Power Supply with Overcharge Protection & Thermal Compensation – for Lead-Acid & Lithium Batteries	�� NOCO Genius GENPRO10X1: 1-Bank, 10A Onboard Battery Charger - 10A Per Bank, 12V Waterproof Marine Charger with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries
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Price	$109.95	$88.95	-21%��$75.22 List: $94.95	$861.06	$1,522.38	$222.43
Delivery	Get it by Sunday, Jun 29	Get it by Sunday, Jun 29	Get it by Sunday, Jun 29	Get it by Sunday, Jun 29	Get it by Sunday, Jun 29	Get it by Sunday, Jun 29
Customer ratings	4.618,386	4.458	4.546	4.4361	4.4328	4.71,424
Sold by	�鶹��.ca	Flyer Price	Flyer Price	�鶹��.ca	�鶹��.ca	�鶹��.ca
output voltage	12 volts	12 volts	12 volts	24 volts	24 volts	12 volts
input voltage	120 volts	12 volts	240 volts	120 volts	120 volts	120 volts
battery charge time	120 hours	—	—	240 hours	240 hours	1 hours
specification met	UL	—	CE	UL	UL	UL, CEC, RoHS

Customer reviews

18,386 global ratings

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Customers say

Customers like the compatibility, ease of use, and charging performance of the battery charger. They mention it works amazing, maintains their batteries, and charges up the batteries like a champ. Customers also appreciate the build quality and compact size. However, some customers have mixed opinions on the heat resistance and starting performance.

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Compatibility Ease of use Battery life Charging performance Build quality Compact size Heat resistance Starting performance

265 customers mention "Compatibility"234 positive31 negative

Customers like the compatibility of the battery charger. They mention it works really well, is easy to use, and has done a much better job than their other lead acid battery chargers. Some say the electronics in their cars still work. They also say the Genius is fantastic.

"Excellent device! I have a 2022 GLC 300 and I don't drive it very often (maybe once a week)...." Read more

"Charger works good." Read more

"Was able to charge two 6V batteries, everything was smooth and worked fine... then unit stopped charging...." Read more

"...Pros: it works. It's boosted my car, when the battery was completely dead...." Read more

156 customers mention "Ease of use"148 positive8 negative

Customers like the ease of use of the battery charger. They mention it's simple, convenient, and a nice little plug-and-play charger.

"...Instructions and user manual were so easy to understand. Will never have to worry about my battery again!..." Read more

"...the device to the battery before plugging it into the power for easy setup as per the manufacturer instructions and it works fine without pressing..." Read more

"...On one hand, its sleek design and user-friendly interface make it appealing. It charges quickly and doubles as a battery maintainer...." Read more

"Arrived on time, beautifully built and fairly simple to use...." Read more

139 customers mention "Battery life"115 positive24 negative

Customers like the battery life of the product. They mention it maintains their deep-cycle batteries, brings more than one battery back to life, and doesn't overcharge. Customers also appreciate the charge function where it can charge the battery from empty to 100% in under an hour.

"...-I'm really impressed with the charge, I charged it once and it lasted over a year, with monthly use...." Read more

"...This charger will charge your dead battery right up and also maintain/topoff. I keep it plug in 24/7 on all of my cars...." Read more

"...It maintains my battery to which I can rely on. I recommend this to anyone who owns any type of “recreational vehicles “. From a satisfied customer!" Read more

"...Does not overcharge, when the battery is full it starts maintenance process Does not get hot Very good material build quality..." Read more

126 customers mention "Charging performance"104 positive22 negative

Customers like the charging performance of the battery charger. They mention it charges up the batteries like a champ, is efficient, and charges your dead battery right up. Some also say it works all batteries and maintains them.

"Charging used for my starting battery" Read more

"...It's a small unit and putting it on someone else's car, and jumping it takes a few minutes. I would 100% buy it again." Read more

"...This charger will charge your dead battery right up and also maintain/topoff. I keep it plug in 24/7 on all of my cars...." Read more

"Amazing charger!!!" Read more

65 customers mention "Build quality"59 positive6 negative

Customers like the build quality of the battery charger. They mention it looks like a very good brand and has a solid feel. Some also say it's a better choice for a lifelong investment.

"...This Noco charger is also one of the best investment if you have a car that you don't drive often or charge your dead battery...." Read more

"...Does not get hot Very good material build quality I absolutely recommend it And yes it restores completely dead batteries." Read more

"Great quality unit with automatic temperature compensation...." Read more

"...But even without the connector, the cables are still great quality and resit slipping off the battery terminals. I would buy another if needed." Read more

61 customers mention "Compact size"56 positive5 negative

Customers like the compact size of the battery charger. They mention it fits easily into the engine compartment, has a slim design, and is lightweight.

"This works great ! Small and compact for easy storage. I just hook it up and walk away...." Read more

"...As for the product itself, it is well packaged and small which is nice for portability...." Read more

"Works as you'd expect. The LED's are easy to read and I like how compact the unit is." Read more

"...5 A is a nice size that it can still charge a large battery without taking forever but also I don't hesitate to use them on tiny power port batteries." Read more

21 customers mention "Heat resistance"13 positive8 negative

Customers have mixed opinions about the heat resistance of the battery charger. Some mention it's great for cold weather, the temperature compensation works perfectly, and is ideal for maintenance over winter months. However, others say it gets extremely hot and turns off if too cold.

"...Does not get hot Very good material build quality I absolutely recommend it And yes it restores completely dead batteries." Read more

"...and it seems it is normal for this product, but I was not OK with the time or the heat...." Read more

"...Hope to keep them from freezing this winter. Time will tell." Read more

"It saved me in the winter ;-)" Read more

17 customers mention "Starting performance"11 positive6 negative

Customers have mixed opinions about the starting performance of the battery charger. Some mention the car started right up, while others say it's more difficult to start.

"...Not only am I able to jumpstart my car when I need it fast and safely, I was able to help other strangers, simply because there wasn't a lot to hook..." Read more

"...charger my 4 wheeler 2021 CFMOTO 800 and I have had no issues starting it even if I haven’t started it in a while...." Read more

"Car would not start after the temperature went below -40 degrees (I'll let you guess if that's C or F)...." Read more

"...repair-charger-maintainer on this battery, I have never had a problem to start my vehicle, even on the coldest winter days...." Read more

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Scott
A MUST for newer high tech vehicles!
Reviewed in Canada on April 23, 2025
Verified Purchase

Excellent device! I have a 2022 GLC 300 and I don't drive it very often (maybe once a week). The 12v battery drains quickly when it's parked due to all the tech sensors and signals on the vehicle always being on. This product was so easy to install and operate. Instructions and user manual were so easy to understand. Will never have to worry about my battery again! I just leave it connected whenever I'm not going to be using my vehicle and it unhooks in 2 seconds if I need to. So great!

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Wayne
Good product
Reviewed in Canada on June 10, 2025
Verified Purchase
Charging used for my starting battery

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Kacy Tyner
Best.
Reviewed in Canada on June 7, 2025
Verified Purchase
Charger works good.

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cruising the rainfall
Love it, held up over two years so far or monthy use
Reviewed in Canada on December 13, 2023
Verified Purchase
I've had this item for 2 years now. And I have to say it is one of the best purchases I've made.

Background: I have a older car, that's kept outside here in toronto, The winter's here can be pretty bad. My car battery is not the greatest, and I found my battery was always draining. Constantly needed a jump. I looked at the big suitcase backpack looking ones, that CAA uses, then I saw this tiny noco. I'm glad I took the risk, it's paid for itself many times.

Pros: it works. It's boosted my car, when the battery was completely dead.
-The safety feature, meaning the electrics won't flow, if it's on the wrong positive or negative, was nice for those times when I was in a rush not paying attention
-my model had a boost mode, so when I would activate it, it would force start my battery.
-very quick. I always feel a little less than human, with people judging me when I have to jumpstart my car, I'm sure nobody cares, but I still feel a bit inadequate. This jump starts my car almost immediately.
-this thing is tiny, I keep it in my glove box, it does what those huge jumper boxes that the professionals have, but since technology is so fantastic, they're able to make it so small but so powerful
-I'm really impressed with the charge, I charged it once and it lasted over a year, with monthly use. I did recharge it just to be safe at the end of the first year. But I probably could have left it and it would have worked fine, there is a battery indicator as well.

Cons: When I pull it out to help strangers restart their car, they look at me a little bit crazy thinking this little item can help. Then they ask me, where they can get one minutes later :)

Recommendation:
If you're someone who needs to jumpstart their car regularly, this thing is a lifesaver.
Not only am I able to jumpstart my car when I need it fast and safely, I was able to help other strangers, simply because there wasn't a lot to hook up. It's a small unit and putting it on someone else's car, and jumping it takes a few minutes. I would 100% buy it again.

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Kanuckson
worked on two batteries, then died... got a replacement and worked fine after
Reviewed in Canada on January 4, 2025
Verified Purchase
Was able to charge two 6V batteries, everything was smooth and worked fine... then unit stopped charging. No matter what I try it would not charge, not recognize batteries, reverse polarity won't matter...
Still, after contacting support they sent me a brand new unit in a week or so.

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isa
fonctionne tres bien .facile a utiliser
Reviewed in Canada on April 28, 2025
Verified Purchase
super car je ne fais pas assez de longue distance et ma batterie meme si elle est neuve , ca ce décharge rapidement été comme hiver alors avec ca ca remonte la force de la batterie pour ne pas qu,elle tombe a plat.

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T. K.
It’s alive….muhahaha
Reviewed in Canada on April 28, 2025
Verified Purchase
Great product. Connect the device to the battery before plugging it into the power for easy setup as per the manufacturer instructions and it works fine without pressing any buttons.

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Kenzo
I love NOCO products!
Reviewed in Canada on February 16, 2025
Verified Purchase
I have the NOCO battery jumper and it saved me a lot. This Noco charger is also one of the best investment if you have a car that you don't drive often or charge your dead battery. I have a few cars that I don't drive for weeks and it will not turn on, I have to jump it all the time and the amount I drive is not enough to charge the battery back. This charger will charge your dead battery right up and also maintain/topoff. I keep it plug in 24/7 on all of my cars. One of my car battery was at 11.4V it took 10 hours to fully charge to 12.6v

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Rodrigo Plata Anaya
Ligero y potente
Reviewed in Mexico on January 22, 2025
Verified Purchase

Me encanto, práctico, poderoso y bastante útil. Llevo como unas 30 recargas y sigue funcionando muy bien.

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G. Johnston
Subaru Owners, your answer to Battery issues is here!
Reviewed in the United States on June 5, 2025
Verified Purchase
Did you buy a Subaru subject to the Battery Settlement? I did. Dealing with the dealerships and Subaru to get them to replace a drained battery and fix the parasitic draw issue is a nightmare, and has been for me and my family.

I did a lot of homework on this issue. I checked out endless Reddits and Youtube videos about the parasitic draw issue.
Then I discovered this baby. Even though my brand new AGM battery was completely drained after driving for ONE DAY after I installed it using the Service Manual, and even AFTER the dealership tried to tell me that the new AGM battery had to be replaced (it didn't), I purchased this as a last-ditch effort when the dealership refused to honor the settlement by telling me they could not conduct a parasitic draw test without me buying a new battery (again).

I purchased on �鶹��, and it was delivered the same day.
The Instructions on use were NOT with the charger, but there is a LINK provided in the packaging that allows you to download the PDF file for the manual.
Setup was a breeze. I installed the included wall-mount holder in my garage in less than two minutes. I connected the alligator clips to the power wires on the unit. I read the manual for the proper charging instructions applicable to my battery configuration (positive-grounded versus negative-grounded: spoiler alert, almost every car has negative grounded). I attached the unit according to those instructions, selected the mode (mine was for an AGM battery), and bingo-bango, in a few hours I had nearly 50% charge on what had been an almost completely dead battery.

***a few caveats***
1. Be sure to take good care of the wires. They are not as thick as the battery wires, so they can easily be damaged.
2. The unit runs warm, so when I unplugged it, it was warm to the touch. Keep this in mind when deciding what to place it on. It has four rubber feet, but I would still be careful.
3. You can use this as a conditioner, charger or repair unit, and it will sense overcharge, and sense overheat, so it has some built in safety features that are nice, but I would still check the unit periodically.
4. I used this for a 12v car battery, but this unit can also be used for 6v batteries and other types, so be sure that you select the right mode in order to ensure proper configuration while it is charging. The lights and indicators are clear and easy to use.

Overall, I could not be happier. Highly recommend.

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N. S.
Great product, Buyer beware US plug not UK
Reviewed in Saudi Arabia on June 15, 2025
Verified Purchase
I love Noco prodand products, this Noco charger does not automatically switch to the battery type... so you will have to switch between normal and AGM manually.

Was planning do get 2 of these, and was glad I didn't though,, as I was surprised to find out that the plug is US not UK which the standard in GCC..

A great product nevertheless.

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HaniK
Great charger
Reviewed in the United Arab Emirates on August 24, 2024
Verified Purchase
Don’t have experience with battery tenders/chargers, this is my first. But I can say very well built compact size. Intuitive setup.
Using it to maintain my jeep wrangler AGM 70AH battery as I travel a lot don’t drive the car that much.
Update:
It has been amazing after few overnight charges the battery recuperated and seems to be back to its full swing. Starting the car now is seamless.

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Richard
Reverse Polarity problem.
Reviewed in the United States on June 5, 2025
Verified Purchase
To All the People Who Are interested in buying this Charger,this is my updated review.Please read the original post below after reading this.

I am beyond impressed with the exceptional support you provided regarding my NOCO Genius 5. Your team went above and beyond, demonstrating unparalleled dedication to ensuring my complete satisfaction. Your prompt, knowledgeable, and courteous assistance truly sets you apart as a world-class company.
Thank you for taking the time to address my needs with such care and professionalism. Your commitment to excellence is evident in every interaction, and I am thrilled to be a customer of a company that consistently exceeds expectations.
I will wholeheartedly recommend NOCO to my family, friends, and anyone seeking top-tier products backed by extraordinary service. You are not just a first-class company—you are in a league of your own!
With sincere gratitude,

Richard Shaffer.

Original post below *

I recently purchased this and was extremely impressed by how well it worked, but then I encountered a problem.
I called NOCO and spoke with Willie G.,
the customer service representative from NOCO, he was outstanding. After I explained the issues with my NOCO Genius 5 charger—displaying a solid red reverse polarity light despite correct connections, no charging activity, cycling through all lights when unplugged, and an unresponsive mode button—he promptly provided clear instructions for returning the defective device. However, I was disappointed to learn that, despite purchasing the charger on May 7,2025, I had to cover the shipping costs for the warranty repair or replacement, which added an unexpected expense to resolving the issue with a brand-new product.
I will update this review after my GENIUS 5 is returned to me.

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NOCO GENIUS5: 5A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

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5.0 out of 5 stars Ligero y potente

5.0 out of 5 stars Subaru Owners, your answer to Battery issues is here!

5.0 out of 5 stars Great product, Buyer beware US plug not UK

5.0 out of 5 stars Great charger

5.0 out of 5 stars Reverse Polarity problem.

Ligero y potente

Subaru Owners, your answer to Battery issues is here!

Great product, Buyer beware US plug not UK

Great charger

Reverse Polarity problem.