Meet the GENIUS2X4 – Similar to our G4, just better. It’s 40% smaller and delivers 140% more power. It’s the all-in-one 4-bank solution – battery charger, battery maintainer, trickle charger, plus battery desulfator.
Multiple banks – A four-bank battery charger maintainer rated a 8-amps – 2-amps per bank – designed to charge and maintain multiple vehicles like cars, motorcycles, boats, ATVs, RVs, lawn mowers, lawn tractors, trucks, and more.
Do more with Genius – Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.
Enjoy precision charging – An integrated 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 – Automatically detects 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 trickle charger, it’s an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use – 24/7 – with zero overcharge.
4-Bank Battery Maintainer, Trickle Charger And Battery Desulfator, Spark-Proof and Reverse Polarity Protection, Force Mode For Manual Battery Charging, Battery Charger For Cars, Motorcycles, ATV, And Lawnmowers, Temperature Compensation For Accurate Recharging
Most car/boat batteries have 5/16″ or 3/8″ screw down battery posts and I purchased this charger to permanently connect to my in vehicle batteries. The eyelits on the clamps are removeable so you can do this, however the eyelits are only 6mm or just under 1/4″. They don’t work for this. They sell additional eyelit connectors for ~$12 each that you can buy separately, so for $50 more I can hook this up the way it is advertised…. Otherwise I’ll have to solder my own connectors which would likely void any kind of warranty.
I had high hopes for this but ultimately disappointed. I was choosing between this and the optima digital 1200, ended up going the Noco route due to the additional leads available and having a lot of batteries to maintain over the winter. Should it have been the case that I only needed this for maintaining batteries, my experience may have been different.
The Noco itself is built very well. Loved the fact it came with the 4 extensions for the leads as well as being wall mountable. Operation was a breeze. Just wish it had charged things like it’s intended to do. I very well could have been the unlucky guy who got a dud. I would have no problem having the Noco unit if I was assured and guaranteed a working unit out of the box. I don’t think I got that though and I wouldn’t have been able to fully trust a replacement.
My first task was to restore an optima red top that had sat in a car over the winter in a garage. The car has a small voltage leak somewhere and so not common for needing to get battery charged beginning of season. I was able to use this to force a charge into the battery and begin it’s cycle. This would get to be about 75% before showing a battery error. Shitty, but ok, battery went bad. We’ll come back to this in a minute.
Next task was to trickle charge my motorcycle battery. This had been already charged with a cheap walmart charger but with the battery optimization this does I wanted to see what it would do. Put on the battery and charged it beyond what the trickle charger showed, so I thought. Light steady green, go to start the bike one nice afternoon for a ride. This bike isn’t injected and so takes a bit of cranking with choke to turn over. Was able to get it to crank for 10-15 seconds, I would ballpark around 30 seconds total needed on a cold start typically, but before I could hit that the battery started clicking. Was low again. This baffled me as previously to putting it on the Noco it would crank for a few minutes like this if it had to. I could have started this in the dead of winter at 0 degrees before the battery would give up. Thinking a fluke I began a few days of trying over and over again putting this back on the charger but could never get it to crank long enough and, again, it would start no problem before putting on the Noco thanks to the cheap walmart charger.
Simultaneously I also charged the ATV and lawnmower to top them off. Lawnmower started no problem. ATV cranked for a good while but is from 84 and normal for it to crank a long time without starting. Wanting to see if motorcycle problem surfaced here I didn’t do my usual started fluid assist and this did crank a good while like I would normally expect.
Reached out to Noco support about this. Was unprepared for the amount of questions they were asking, they do want to know the make and model of battery and voltage reading from a voltmeter, but ultimately was told that if I didn’t think it was working correctly I could warranty it. They would then test and replace as their testing deemed. Having just bought this through Amazon I elected to exchange. I got the optima digital 1200 instead and first day on things charging seems to be doing amazing.
Ordered this charger on prime day and finally installed it 4 days ago and everything seemed to be working well. However 2 days later port 3 is now flashing that the unit is under temperature and cannot operate. Emailed support and they say that it sounds like the unit is faulty to send it to them under warranty replacement. Kinda a little miffed that after 3 days my brand new unit needs to be replaced but at least support was fast to respond. Hopefully they are as fast to send me a replacement unit and not the 4 to 6 weeks they quoted. This unit comes with a 3 year warranty so hopefully this will not be a repeated occurance. Unfortunately because I delayed setting it up I am outside of Amazon’s return/replace window. I have another charger by this company and have not had an issue with it so hopefully it’s just bad luck, but only time will tell. I was impressed with the overall build of this unit and the accessories included with it but apparently something under the hood is less than optimal.
Update 1: Reached out to NOCO support and they’re responce was quick and efficient with an RMA claim paper. Just have to pay for shipping, which was 30 dollars to ship to the factory in AZ. So far my prime day purchase has not been the stellar deal it was supposed to be. I would have hoped that the company would have provided some means of shipment to them for a discounted rate but no dice. More updates to come.
Gabriel Ionita –
Über Winter lagere ich meine Bootsbatterien im Keller. Damit sie im Frühjahr wieder einsatzbereit sind habe ich sie bisher mit 4 Ladegeräte vital gehalten. Da diese Ladegeräte ältere elektronische Ladegeräte ohne Erhaltungs – Funktion waren habe ich sie durch das vierfach NOCO Genius 2×4 ersetzt. Der geringe Ladestrom von max. 2A ist genug für die Erhaltung und Pflege der Batterien. Die ersten 4 Batterien waren nach 2 Tagen voll vitalisiert.
Eine altersschwache Batterie wurde probeweise angeschlossen und nach einigen Versuchen hat das Gerät die Batterie als defekt angezeigt.
Despite the claim that this device can charge up to 40 Ah and maintain ANY size battery, this product, by design, will NOT maintain anything larger than the charge rating. I purchased the unit specifically for maintaining 4 batteries all winter. A lawn mower battery and a small car battery worked fine, but two fully charged deep cycle batteries of 50 Ah and 70 Ah could not be maintained by this device. The device begins in charge mode each time it is turned on. With large batteries, even those that are 100% state of charge and 97% state of health, the device is never satisfied with the charge status. It remains in charge mode for 5 straight days while the batteries bubble vigorously, never reaching the optimization or maintain phases. After 5 days, the safety time limit kicks in and turns the device off with a bad battery symbol. NOCO support suggested I pay my own shipping for a warranty claim where they “tested” the unit and then sent me a new unit. The new unit has the same problem as the old unit because it is a design flaw, not a defect. All of this troubleshooting put me past the return window. I do think the product is of decent build quality but it does not perform the advertised functions.
Is a good product even if a tad expensive didn’t save my dead battery
Ian Cormack –
give life to any empty or dead battery
Ian Cormack –
Far better than previous charges I have had. The the trickle facility is really good and the option to have 4 batteries on charge at the same time is very useful.
James M. –
Everything seems like its well made, good quality. Works great and is super handy when you have multiple batteries to maintain, no more swapping changers around every few weeks, just fit and forget.
Its great that it can charge different types of batteries as potentially I could be charging stand lead acid, AGM and lithium batteries all at the same time.