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

This product is far more than a simple battery charger—it's a complete battery care system. Its advanced features, intelligent design, and ability to handle even the most challenging battery conditions make it an outstanding investment for anyone who owns multiple vehicles or wants to extend the life of their batteries. It's user-friendly, and the charger operates efficiently and safely. It provides peace of mind knowing that your batteries are being maintained properly, whether in daily use or long-term storage. ✅ Pros: Advanced battery maintenance technology Smart and intuitive operation Reliable performance in difficult battery situations Ideal for multi-vehicle households or long-term battery care ⚠️ Cons: None significant observed so far 🔚 Final Verdict: If you're looking for a powerful, intelligent, and dependable battery charger, this is the one to get. Highly recommended for both casual users and automotive enthusiasts.

Really great charger. High quality and very versatile. Works well on the AGM and flooded motorcycle and car batteries I’ve used it on. In fact, it even recovered the 6 year old motorcycle battery I just replaced due to age. So now I have a spare! Two things to note are that the battery fully charged green light will continue to blink for a long time in some cases. It will eventually go to solid green but. Once fully charged, the light will eventually go to blinking green which just denotes trickle charging. Use caution with the recovery function, it should be a last resort for a battery you would otherwise be discarding. If you use it on a slightly sulfated battery, you can shorten the battery life. That said, this is an excellent, well made and versatile product. I selected because it was reviewed by multiple car and tech magazines - they were right! Update - I’ve used this for a few months now and like it even better. It will even charge a battery installed in a car without having to remove it…

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 💪🏻