NOCO GENIUS1: 1A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection
4.4 | 59,553 ratings
Price: 29.95
Last update: 02-02-2026
About this item
- MEET THE GENIUS1 — Similar to our G750, just better. It's 35% smaller and delivers over 35% 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 1A charger, a direct wall plug-in, 110-inch DC cable with battery clamps, and integrated eyelet terminals, and 3-year warranty. Proudly designed in the USA.
Product information
Features & Specs
| Output Voltage | 12 Volts |
|---|---|
| Input Voltage | 120 Volts |
| Battery Charge Time | 1E+1 Hours |
| Current Rating | 1 Amps |
Measurements
| Item Dimensions D x W x H | 4.02"D x 3.43"W x 6.73"H |
|---|---|
| Item Weight | 15.2 ounces |
User guide
| Specification Met | CEC, FCC, UL |
|---|
Additional details
| Color | Black |
|---|
Warranty & Support
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NOCO GENIUS1: 1A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – For Lead-Acid & Lithium Batteries
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Item details
| Brand | NOCO |
|---|---|
| Mfr Part Number | GENIUS1 |
| Global Trade Identification Number | 00046221190021 |
| UPC | 046221190021 |
| Manufacturer | NOCO |
| Customer Reviews | 4.44.4 out of 5 stars(58,328) 4.4 out of 5 stars |
| Best Sellers Rank |
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| ASIN | B07W46BX31 |
| Item Type Name | NOCO GENIUS1, 1A 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 |
| Built-In Media | 3-Year Limited Warranty, Battery Charger User Guide, GENIUS1 1A Smart Battery Charger and Battery Maintainer, Needle-Nose Battery Clamps With Integrated Eyelet Terminals |
| Item Height | 1.3 inches |
| Unit Count | 1.0 Count |
| Warranty Description | 3 Year Limited |
Top reviews from the United States
- Nick EMReliable little charger that just worksThe NOCO Genius1 Smart Battery Charger has been exactly what I needed — simple, compact, and effective. It’s not a flashy tool, but it does exactly what it promises without any hassle. I’ve been using it to keep my motorcycle and a spare 12V battery topped off, and both stay charged and ready to go.
Setup is straightforward — just connect the clamps and select the right mode. It automatically switches to maintenance once the battery is full, so you can leave it connected without worrying about overcharging. The design feels sturdy, and the cables are good quality for the size of the unit.
It doesn’t take up much space, and it’s easy to tuck away when not in use. For something so small, it performs really well — my bike fires up instantly, even after sitting for a while.
Pros:
Compact and easy to use
Keeps motorcycle and 12V batteries fully charged
Automatic maintenance mode works perfectly
Solid build and clear indicator lights
Cons:
None so far — just remember it’s a 1A charger, so it’s meant for maintenance, not fast charging
Overall, the Genius1 lives up to its name. It’s a dependable, worry-free charger that keeps batteries healthy and ready when you need them. - A TurnerGreat 12v ChargerThe NOCO Genius 1 has worked great so far. I used it to charge a 12v and 12.8V lithium battery using the lithium setting, and it brought it to a full charge in about a day without any issues. The charger is compact, easy to use, and clearly shows charging status. I do wish the directions came with the full manual, as I had to look up the indicator light meanings online. Still, it’s a reliable and well-built charger, and a great value for the performance, perfect to have on hand, especially before hunting season.
- C. NekritzLittle MiracleOkay, I did NOT expect this little thing to work, but it did and might for you IF you have patience.
My Grandfather who was MoAT (Mechanic of All Things) owned back in the day what I thought were REAL chargers, they were so big and heavy they had to be put on wheels and rolled around, they had giant switches that'd illuminate and while I'm probably purely imagining this they were plugged into 220-volt outlets. This thing fits in the palm of my hand, just as pictured, smaller than most mobile phones. "Huh," I said, "this should be comical."
I hooked it up and, as others have said, figuring this thing out is NOT straight forward, the instruction manual is weak to say the least, the good news is, as I found, there are many intrepid experimenters who, like me, bought it on a whim and did some trial and error which it'd seem 99% of them got the thing to work to their needs, just like me hence, I'm taking the time to write this review. What this lacks in coherent features or instructions it makes up for it in the end by eventually (boy I mean eventually) getting the job done, for that honestly I'm giving it a generous five stars, because it did what I wanted it do against all odds, just like the Phil Collins song. ("Just take a look at my car now, 'cause it's finally starting here.")
To get the to point, this took TWO WEEKS to charge a completely dead battery in a completely dead system. If it'll help anyone I own a 2000 Lexus RX300 that is, in fact, drinking age, if I could find a small ute-friendly bar to have a couple with me of which, in terms of trusty old friends, this boring beige over beige has been one of my best now with over 270,000 miles with no reason, per the Lexus dealer, to give up the ghost before 300,000. Toyota quality and then some with only wearables and maintenance needed BTW, the car has only had one issue, eating car batteries every four or so years. Being a cheap bastard and Lexus parts are pricy I've chosen battery over a slightly-off generator which brings us to the recent hullabaloo and the need to be the Noco Genius, though it'd prove not straightforward as I hoped.
Hooking up the Noco Genius you get a slowly blinking light, like a heartbeat, that will tell you nothing really. Also there's a force-charge setting where you hold the button (there's only one button on the whole thing, this thing is basic) it supposedly will force a charge into a battery... this doesn't work, at all. After some digging it supposedly only does this if a battery is below some arbitrary limit which, my battery was completely dead, kaput, nada, force charge only made the 6V light go on which, apparently, is what others experienced. Point being, don't hold you breathe.
I kept trying to charge the battery but it didn't budge, didn't budge, didn't budge, then I had a thought and said to myself "self, what if I unhook the battery, THEN charge it?" As in, is it because it's also hooked to my car hence current is going other places? Mind you, this thing is only one (1) amp, that's very little, if you're looking for a quick charger or something to charge and jump your car, this ain't it, have you seen the size of this thing? Ha no, no, but it will trickle, very slowly, a charge into your battery... if it's not hooked to the car.
Listen, some people this may work when the battery is not hooked up and, in fact, I hooked my battery back up AFTER this thing actually worked and then hooked up the Noco to it and it did, in fact, go from red blinking to green, sooo, yeah, that happened. But I'm burying the lede here:
The Noco charger worked for me but ONLY after it was hooked to the battery without being connected to the car. Total time to charge the battery not hooked to the car? About 36 hours. Great? Eh, there's a pandemic, I'm not really going out much so had time on my hands, not to mention my wife's car.
In summation, IF you have even a completely dead battery or run down battery and IF you don't have to go anywhere in the next two days and IF you're comfortable unhooking the leads from your car to your battery so that it'll only be charging the battery itself this Noco Genius is, er, uh, genius! It really works! It works and for the cheap cheap cheap money its worth every penny. If this thing cost even 50% more I'd be taking down stars but this thing cost less than a steak dinner (back when I ate steak) so suffice to say it got my battery charged all the way up, hooked up to my car and after the computer was all "what the... ??? Was I in a coma" my car fired right up and ran, I even drove it around a bit.
This would be a good thing to own for just-in-case as its just in case money. If you have any situation close to mine, get this trickle charger, if you need the big guns, well, open up your wallet and say ah. Luckily most of us, probably 99% of us, if your battery is run down, this will do the trick.
Best of luck! - Cody MarriottGreat all-purpose charger, but clamps could be a little sturdierI’ve been using the NOCO Genius1 for just about everything; car, lawnmower, ATV, and it’s been a solid performer across the board. It’s compact, easy to use, and the smart charging modes make it great for maintaining batteries over time. My only gripe is that the charge clamps feel a bit cheap and don’t grip as securely as I’d like, especially on smaller terminals. Other than that, it works exactly as advertised and has saved me from a few dead-battery headaches.