NOCO GENIUS5, 5A Smart Car Battery Charger, 6V and 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger

Name: NOCO GENIUS5, 5A Smart Car Battery Charger, 6V and 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger
SKU: 45939
Availability: InStock

4.6 | 18,460 ratings

Price: 69.95

Last update: 01-07-2025

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 universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
Do more with Genius - Designed for 6-volt and 12-volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free, plus lithium-ion batteries (lifepo4).
Enjoy precision charging - An integrated digital thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
Restore your battery - An advanced battery repair mode uses slow pulse reconditioner technology to detect battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
Beyond maintenance - It's not just a battery trickle charger, it's an advanced battery charger maintainer. A fully-automatic, worry-free smart battery charger for everyday use - 24/7 - with zero overcharge.
Compatible with all types of gas and diesel vehicles - Charge and maintain 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.

Product information

Technical Details

Manufacturer

‎NOCO

Brand

‎NOCO

Model

‎GENIUS5

Item Weight

‎1.59 pounds

Product Dimensions

‎3.43 x 4.61 x 7.95 inches

Country of Origin

‎China

Item model number

‎GENIUS5

Exterior

‎Machined

Manufacturer Part Number

‎GENIUS5

Special Features

‎Battery Charger For Cars, Automotive, 12V and More, Spark-Proof and Reverse Polarity Protection, Force Mode For Manual Battery Charging, Battery Maintainer, Trickle Charger And Battery Desulfator, Temperature Compensation For Accurate Recharging, IP65 Ingress Protection

Top reviews from the United States

mattie73

Reliable. Easy to use

Reviewed in the United States on April 5, 2024

So glad I purchased this charger. I have used it on my car battery as well as lawnmower batteries. It does a good job and I like being able to see how the charging is progressing. Easy to use and considerable smaller than chargers used to be. I recommend this product.

Lefty

Great little battery charger that works excellently and preserves battery life

Reviewed in the United States on May 23, 2023

I’m very happy with the NOCO genius 5 battery charger. It brought my 2-1/2 year-old battery back to a fully charged battery in less than 24 hours, from an approximately 50% (12.3 volt) charged battery and is holding the charge for several months now. I originally bought a combination 4-amp battery charger/maintainer from a great company that has been manufacturing high quality chargers for a very long time but that charger was not able to bring up the charge on my battery any higher than 50% even after two weeks. After I read about battery sulfation, I realized that my battery probably had a sulfation issue since it sits garaged for 2-3 week periods now that I work from home and when I drive it, it’s usually not long enough to recharge it. The charger I had bought did not have de-sulfation capability. I decided to buy the NOCO genius 5 based on lots of great reviews from various sources not just Amazon and also because of all the different functions and versatility it offers. For what you get I think it’s very reasonably priced. It was the same price as my first charger that has far less capabilities.
It comes with a detachable cable that has spring-loaded battery terminal clamps. These clamps can be removed leaving only ¼” eyelets that you can then attach directly to the vehicles battery terminal harness mounting clamps for a permanent installation if you prefer. This cable 24” long from end-to-end before connecting it to the shorter cable that is permanently attached to the charger body. I wish NOCO would have provided two separate cables, one with battery clamps and one with the eyelets as many other battery charger manufacturers do. You can buy the eyelet cable separately but I think it’s fairly expensive at $19 at this time. There is also no bag or container for storage, only the cardboard box it comes in.
It looks to be put together very well and of good quality. Although since the entire body is plastic, I’m pretty sure if one were to accidentally drop it from an automobile engine height down onto a concrete surface it is likely to crack open.
On the bottom of the NOCO charger is says Designed in the USA and Made in Vietnam.
The only real complaint I have is the user guide that comes with it. The print is extremely small and very difficult to read. I could see that being a problem for people with poorer eye sight. The user guide does not mention anything about the de-sulfation process that is performed automatically by this microprocessor-controlled charger. De-sulfation is mentioned in the user guide for the 12-volt repair mode but I believe this is different from automatic de-sulfation that occurs during the normal charging mode. Anyway I'm loving this charger and glad I bought it and recommend it to others.

John Beard

Revived my battery

Reviewed in the United States on January 18, 2024

I bought a used 2022 Honda Ridgeline with ~7,000 miles on it some months back. It was a "dealer demo car" and was well-maintained as a result. Now, it's got around 12,000 miles on it.

One day, I left the lights on too long with the ignition off, and had the radio playing. Stupid on my part, but my battery didn't have enough charge to deliver the amps needed to turn the engine over. I bought a Noco GB40, and it worked well - it'd start my truck when needed. Yesterday, it didn't. I guess the battery had degraded too much, so I was shopping for new batteries when the sticker shock hit me. Given the age of my truck, I thought it would be silly to replace the battery.

Someone recommended the Noco Genius5, so I gave it a shot. Amazon's same-day delivery got it to me quickly, and I basically hooked it up to the battery, plugged it in, set it to AGM mode, and let it go to work. I waited several hours for the charger light to show "solid green", indicating it was fully charged. I started up my truck; it sounded better than the day I bought it. However, on the dash, it had a note about an "emissions problem". My scan tool showed a permanent code with the Transmission Control Module and a bunch of other temporary codes. Since I didn't have any codes before, I figured I may have freaked out the electronics by charging the battery while the battery was hooked up to the truck, or maybe by touching the terminals out of sequence when removing the cables. Either way, I removed the battery from my truck, hooked up the Genius5, and set it to "repair mode".

My truck had low mileage when I bought it, at about a year old, which likely meant that it say for a while when not in use. Maybe that could have led to sulfation or stratification, which could have meant it wouldn't charge as effectively from the alternator. I also wanted to remove the battery to allow the computers to reset in the truck. If it was still throwing codes after that, I'd bring it into the dealer.

This morning, when I woke up, I noticed the Genius5 was in standby mode, meaning the repair mode had finished. I started the Genius5 back up, and set it to AGM mode again -- it took about a minute, but it said the battery was good to go with a solid green light. I Installed the battery back in my truck, fired it up, and I kid you not, it sounded better than ever -- less strained, more powerful, and all of the codes were gone. My truck had a freakout -- not due to this device, I'm sure, but likely due to me doing something stupid.

It's rare for me to review a product so quickly. This thing is amazing, has lots of neat accessories available for it, and saved me money. I'll continue using it to prolong my batteries and save me money in the long-run.

If you're on the fence, this little device is absolutely legit. 10/10 would recommend.

Amazon Reader

Gets the job done the first time

Reviewed in the United States on May 14, 2024

This little powerhouse did the job. My battery was deader than a doornail and it brought it back to life and the battery continues to hold a charge. Setup was easy and I just left it alone for a few hours and it revitalized the battery. It was a fairly new battery, but it didn't require further reconditioning and is running fine. Everyone should have one of these in their toolbox.

Todd

Clip broke on first use

Reviewed in the United States on February 24, 2024

Seems like a good charger/maintainer. On my first use, I connected the lead to the battery and went to plug the power source into the leads. To my surprise, the clip flew apart and dropped down into the engine compartment of the car with at least one piece being lost (spring). Since NOCO seems to have a good warranty, I called them and asked about what happened and what could be done about a replacement. To my surprise, the guy on the phone said “oh, that happens all the time!” He said most people just accept it and don’t return the product, which I am sure I will do as well. It’s not a vital piece, but nonetheless is a known defect that is not being addressed. The NOCO 5 seems like a great product, but is not worthy of a 5 star rating due to a cheap clip that will break on first use.

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