GENIUS10: 10A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid & Lithium Batteries

EDIT 2/26/24: I am now the blocks "AAA". Been helping people start their cars when jump starts with cables have not worked. Definitely handy to get other people out of an otherwise expensive pinch. I have a car battery that I purchased around 2016 (date of review 1/3/24). The car itself does not get driven much, at most 2-3 times a week no longer than 15 minutes one way. Throughout the years I've drained it by leaving the car lights on. Its always required a jump start after that to get going again. Recently I've been an idiot and been leaving my lights on more frequently. Eventually it required me to jump start everytime I wanted to turn on the car. It was becoming a hassle and I was about to call it quits and purchase a new battery until I came across Project Farm's review on battery chargers. This was at the top of the list so I figured to give it a shot. I was not disappointed! I charged it for 4 days straight, put it in my car, and it started right up. Not surprised considering it was just charged but the real test laid ahead. I was going to be out of town for two weeks and leave the car sitting. I came back two weeks later and the car started up, no hesitation whatsoever, as if it was a different battery! The NOCO Genius 10 saved me about $150-200 at least in a brand new battery. On top of that, I can now use it for other batteries in the event of any similar issues. The instructions on the other hand are a bit confusing and had to rely on YouTube comments to piece it together. For those who are confused at what to do, I did not do a 12V repair (function which this unit has) as it requires the battery to be completely charged first. All I did was charge it straight for 4 days uninterrupted. When first put on battery to the charger it will be in standby mode. You push (or hold depending on what you need) the MODE button to select your desired option. I was charging a lead acid battery so I selected 12V. The meter at the top slowly advanceD from each of the four bars until the final bar was pulsing green which indicates its charging to full (over 80% I believe). The green charging light continued to slowly pulse even on the 4th day but I took a gamble and disconnected it from the battery. For the battery to be 100% charged, the green light should stay solid. That means my battery worked 2 weeks later after sitting and it wasn't even at 100%. The unit can also force a charge on batteries that are extremely under voltage. Thats a separate setting that I haven't had to use yet. It can also charge AGM and Lithium but I believe the 12V repair function is only for lead acid. Unfortunately I had to go through 3 separate orders because the first two were from Amazon Warehouse and I encountered issues with both, consecutively. I ended up getting frustrated and just purchased a brand new charger. Pros: Solid build quality Excellent cable connections with weather covers Compatible with a wide variety of batteries Repair and Force charge batteries Cons: Poor instructions Charge is slow BUT I think thats how these chargers work TL;DR Try this first before rushing to get a new battery it is a good investment that can save you a lot of money

I brought this to try it and it works better than the 5 different chargers I currently have. I brought it for the repair feature it has and it did the job. It brought a completely dead battery back to life.

Why a charger and a charging routine? I have read that the extra electronics on recent autos make more demands on batteries. Sure enough, my 2022 JLR has a start-stop ESS feature that was acting up and giving me error codes and "ESS not ready" messages. I put this NOCO 10 on the battery and it would not take a charge. Tried several times for hours each time and it would return only an error message--the OEM AGM battery was too damaged from deep discharges to hold a charge... Repair mode: I made a plan to buy a new AGM battery but I thought why not try this Repair mode the NOCO has. Repair mode does several things, but includes increased voltage and a de-sulfating process to repair damaged batteries. After one 4 hour "Repair" session, this OEM AGM battery would charge normally and took a full charge. It's probably still damaged to some degree, and will likely require replacing sooner than it would without that damage, but the NOCO 10's ability to bring it back to life is well worth it. Paid for itself and more on the first application. NOCO 10 vs NOCO 5: others have found that some newer auto systems with more complicated OEM battery combinations may not get properly charged with the NOCO 5 and may require the 10 volts the NOCO 10 uses to get at the main plus auxiliary battery system. Now that I have the Aux battery disconnected I'm sure the NOCO 5 would do fine charging just the main battery. Like the 10, the NOCO 5 appears to have a Repair function so that's a plus, but whether the 5's lower voltage allows as effective an extra-voltage Repair I don't know. 12V Supply: The NOCO 10 includes a 12V Supply feature the 5 doesn't have, which allows me to run 12V appliances like an air compressor from the wall outlet in the garage so I don't have to hook up to a battery when I'm home. Good feature. Quality: The NOCO 10 feels well made, sturdy and tough, and yet still pretty small and light for what it is. The rubberized bottom keeps it from sliding off the fender. I really like the quick disconnect coupling. The alligator clips are high quality and have eyelets built in if you remove the alligator clips. Accessories: Good value inexpensive NOCO accessories means I can have my auto battery set up with bolt-on eyelet lead so it's a simple automatic plug in process; takes 10 seconds to set up routine maintenance. The NOCO 10 comes with a wall mount / on-board mount so you can set it up in various ways. There is a quick disconnect accessory that lets you charge your battery through the cigarette lighter 12V plug and not even have to open the hood. And a quick disconnect extension cable if you prefer to mount the NOCO 10 on the wall.

I cannot recommend the NOCO Genius10 enough. After a truly awful experience with an expensive, useless charger (the JMR), the NOCO was an absolute lifesaver for my 2022 Porsche Cayenne. My car has a specialized Lithium (Li-ion) battery, which can be difficult to charge with standard equipment. The worst part? The dealer quoted me $2,000 to replace the dead battery, and because it was a special order, the part was on a 4-6 week back order! I was looking at a massive bill and weeks without my car. The overpriced competitor (JMR) completely failed to charge or repair my battery—even after days of being plugged in. The NOCO Genius10, however, handled the challenge with ease. It has modes to work with multiple battery types, including Lithium, Lead-Acid, AGM, and Marine, and successfully not only fully charged the battery but also successfully repaired it! This charger is proof that you don't have to spend a fortune to get top-tier performance. For less than half the price of the faulty unit I initially bought (it cost me around $80), the NOCO is incredibly versatile. In addition to its multi-chemistry capability, it serves perfectly as a trickle maintainer. This is ideal for keeping the battery topped up and healthy during the times my Porsche is parked in the garage for several days. Stop searching and buy the NOCO Genius10. It's affordable, reliable, and actually works on tough-to-charge batteries like Lithium. This brilliant piece of engineering saved me $2,000 and weeks of waiting!

Even I got issue with the item, they sent a new one to. Thanks!

42 years as a mechanic and I have to say I’ve used all kinds of chargers in my life, and the Noco genius is absolutely the top tier of all. set it and forget it. The smart feature of the charger does it all for you. Today’s batteries are quite sensitive to voltage whether it’s a lead acid or an AGM battery too high voltage or too low of voltage output from a charger you don’t realize it, but it will damage the batteries as it charges. AGM‘s are especially sensitive to this. When charging the Noco automatically adjust voltage output and the amperage output as the battery begins to top off preventing damage and allowing the battery to top off fully at its maximum capacity, which is very important on lead acid batteries. This is where cheap to mid range battery chargers don’t work properly. They often continue to flow even when the battery is topped off at quite a high voltage damaging the battery. This charger also incorporates a desolfation mode that can bring most discharge batteries back to life it also incorporates a forced charged mode that will allow it to charge a battery that is down to one volt which most other brands of chargers will not do smart charger or not. These chargers are very well-made. The plastic is not cheap and is very strong. It has good weight to it. The power cable leads our 16 gauge so they are quite thick. The clamps are copper that is plastic covered, but are extremely solid and durable I’ve been using them for years and have never had an issue. The ambient temperature sensors on these chargers are also another strong point as they actually work properly, allowing a battery that’s in a vehicle in cold weather conditions to top off faster and better and then it will keep it there ensuring a strong start to next morning. For those that want the very best charger that will outperform anything else in its category look no further this is the one along with the three-year warranty that backs it up if something should go wrong. I highly recommend this product. You will not be disappointed so spend the extra money and get the best. You’ll have it for 20 + years

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I wasn’t expecting to become that person who gets excited about a battery charger, but here we are. I bought the NOCO GENIUS10 after my car battery kept dying during cold mornings, and it’s been a total game-changer. Setup was super easy — plug it in, connect the clamps, and the charger does the rest. I love that it’s fully automatic and smart enough to figure out whether I’m charging a 6V or 12V battery without me fiddling with settings. The safety features are reassuring too — no sparks, reverse polarity protection, and it even compensates for temperature, which is perfect given how hot it gets where I live. What really impressed me is the battery desulfation mode. I had an old battery that was barely holding charge, and this charger managed to revive it enough to get me through a few more months. If you want something reliable and worry-free to keep your car battery healthy, this NOCO Genius charger is worth every penny.

excelente, un poco confuso de usar al principio, pero una vez entendido el manual, es muy sencillo todo lo demás. Robusto y poderoso, se calienta pero eso es normal en este tipo de dispositivos de potencia Después de haber pasado tristezas con cargadores baratos, aprendí que invertir más en una buena herramienta como este noco Genius10 es el mejor acierto y facilita mucho el trabajo 💪🏻