NOCO GENIUS5, 5A Smart Car Battery Charger, 6V and 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Motorcycle, ATV, Lithium and Deep Cycle Batteries

Great little battery charger that works excellently and preserves battery life
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.

Revived my battery
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.

Gets the job done the first time
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.

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.

La batería de mi vehículo con menos de un año de compra, por falta de uso se descargó totalmente, y traté de pasarle corriente con otra pero fue inútil, y por internet encontré la opcion de NOCO y me decidí probar, no es barato, pero si eficiente y fácil de usar, aunque si un poco lento, lo puse toda la noche y por la mañana marcaba 60% de carga, y al instante encendió mi vehículo, no sé si cargó y reparó como lo anuncian. El caso es que ya no me ha fallado, pero procuro usar más seguido mi Journey para no volver a mismo