charging Battery with the NOCO Genius 2

[@granjmy]

I REALLY appreciate this video. You gave a clear demonstration of how to hook the Genius 2 up, and go through the modes. That's what I've been looking for. Thank you VERY much!

[@WelkingVue]

You're welcome!

[@4IzyB]

Thanks for including the additional steps w/ the other tools, etc.

[@chainarmor448]

This charger only charges at 2 amps, so it will take longer on a battery that size. Give it 3-4 days and it’ll charge

[@JohnRocker340]

It charges a dead car battery in 5 hours.

[@nealjonmurphy]

@@JohnRocker340it absolutely didn’t for me took 2-3 days

[@bradparker7506]

After ~ 30 hours the charger will shutoff and the bad battery light will switch on indicating a bad battery. Let the charger tell you the battery is bad - don't guess.

[@morgangermsheid7696]

I actually found this helpful

[@carolinafirewood]

The battery is showing high resistance due to either heavy sulfation and/or low electrolyte. Put the battery is an open container to help prevent battery acid from getting on floor, table, pop the caps, check the levels and top off with distilled water. Next, put a high amp manual charger or stick welder and cycle on/off at high amperage 4 or 5 times, 15min on, 60min off to shock the battery and start the desulfation process. There are several videos showing how to do this, and do not leave this process unsupervised. THEN put the NOCO charger on it and let it sit for a couple-three weeks. You might be surprised at the results. Of course I do know this video is over a year old, so you've done moved on, but a good deal of people are tossing a LOT of batteries that can otherwise be reconditioned (resuscitated). Patience is the key. 😎

[@WelkingVue]

If what you're saying is true, you sure know about battery more than I do. The three weeks sitting would be difficult for some people who only have one car. Yeah your correct I already moved on. Thanks for the comment.

[@yungwing4940]

Yes you can make the noco 2 do the same thing by holding the mode button down 7 seconds instead if 5. It forces a 20v charge for 5 minutes to shock the battery like a stick welder.

[@fallback8314]

his first battery is not terribly bad! my noco took my battery from 83cca to as high as a little over 600cca after several repair cycles over several days. at first i kept putting the noco on it and it wasn't doing ANYTHING. it simply would not go higher than 88cca. then after like a day or two of battery rest i threw it on it not expecting anything and after a few hours i checked and it was at i believe the number was 224cca or 244cca! i immediately looked at the noco shocked and impressed!

[@walleyehunter8862]

My car that's been sitting in a field all summer has 12.0 volts and it takes about 10 hours before the level starts to rise the voltage to a full charge

[@404notfound.....]

Usually when voltage readings are conflicting the multimeter will be considered correct over the tester, however that looks like a cheap $5 multimeter tester so I would believe the Foxwell battery analyzer 1st.

[@allandrake4426]

I have a Foxwell and it reads on the high side compared against a Fluke mm

[@alramonl]

The Noco Genius 2 is rated to charge batteries up to 40 Ah in capacity. That first battery has a bigger capacity for sure. You need a Genius 5 or larger for it.

[@EJR20]

So you’re saying this 2A charger won’t charge a 12v 95A battery for an Audi A4? If yes that would be strange, I’ve seen reviews of people charging just as big of batteries. Only thing I’d wanna agree on is it would take a whole lot longer to charge it. Maybe even 100hrs. Do you concur?

[@JerryDoe]

regardless the capacity of the battery, the Noco Genius 2 has a capacity of 40 Ah but that doesnt mean it can't charge larger batteries it means that the Noco 2 is capable of charging 40Ah batteries in 8 hours. to get a full charge you'll need around 16 hours+ with this charger. Since tha battery was sitting at around 8 volts it might be sulfated, you'll need a charger that has a desulfating option, but in my experience desulfating with a charger is just very temporarly and a myth, once sulfation in a battery has begun there is no way to convert "corroded material" back into its original form, a charger might temporary knock off some corrosion from the plates inside but that material will stay in the battery at the bottom causing a short circuit in the near future.

[@WelkingVue]

Thanks that's something to think about.

[@dannythebeerman]

That's not true that a Genius 2 can't charge and desultate larger batteries than the listed 40Ah. it just takes a few days.

[@JerryDoe]

@@dannythebeerman Hi, electronics engineer here for the last 20 years.... I'm talking about charging here not desulfating. Capacity of batteries are rated in AH, this is or should be the exact "volume" of a battery. Chargers are usually expressed the amount they charge over a period or around 8 hours. In this case 40AH. This means an 80AH charger can charge a 40AH battery without problems, usually higher amp chargers can be set to lower capacity to reduce heat or sulfation that could damage the battery. But a 40AH or even 20AH charger can definitely charge even a 120AH battery because the input voltage doesn't change. Obviously it will take twice as long, but it'll charge fully. It's even healthier for your battery especially if they got drained completely. Uninteruptable Power Supplies use this system to preserve and prevent maintenance free batteries from boiling and sulfating. They charge the battery at only 1/8th of the total battery capacity to elongate the lifespan. Because a VLRA battery isnt much different then a car battery, except that its closed, doesn't have relief valves and uses the same acid and lead plates internally as a car battery.

[@matsudakodo]

Thanks for the info on the Ah ratings being at 8 hours. That means I don't need to spend the money on the Noco 5 and that the 2 will be fine.

[@HighRoad317]

Great content.

[@neitzsche5150]

Useful video. Thank you.

[@disabledarmyveteran]

The fox well tester you have there can also test the charging system on the vehicle

[@dollarbill93]

Fill the water areas with the correct distilled water. Connect a known good battery to charger. Connect the lot to the dead battery and give it 1 day. Should then be able to separate again and place the rejuvenated battery on charger again.

[@ozzstars_cars]

It's a Walmart Maxx NeverStart, of course it was dead. lol

[@ginocapone7783]

Hey you can put the charger on repair mode for your dead battery and see if it could fix it give it a try

[@josemedeiros007]

Only the Noco Genius 5 and 10 chargers have a repair mode.

[@kaantek499]

Hello I put my battery since 4hours but still in the first red light… why it’s not going to the green ?

[@WelkingVue]

See if any of the error LED are lighted. If there's no error LED, maybe try charging it again.

[@zarideas2171]

Hi, Same problem today?!

[@realtalk2046]

i’m sure you’re solved this by now but to anyone whose scrolling these comments, mine has been charging for 12 hours and hasn’t moved up a single bar. I’ve seen all over online that it can take 2-4 days as it’s only 2 amps. I’ll leave it for the weekend and be back w an update

[@DegenerateGamblers_]

@@realtalk2046 it’s been a month, what did you find out 😂

[@realtalk2046]

@@DegenerateGamblers_ oh it charged halfway over the weekend. (roughly 72 hrs) that was enough to put it back in my car and go though been fine since

[@Tahara-Aichi]

Takes about 4 days to fully charge

[@Tahara-Aichi]

Batteries are supposed to charge at low amperage

[@josemedeiros007]

Good video, I would leave the charger on the battery for a week or more, let it try and desulfate the cells. Did you also check the electrolyte level in the battery and add distilled water if it needs it?

[@WelkingVue]

I didn't check. If my memories are correct there's been a few times when it's taking a long time to charge or doesn't charge, so I disconnect the charger from the battery and reconnect to charge again, then all of a sudden, the charge finish in a short period of time.

[@josemedeiros007]

@@WelkingVue If you bought the Noco Genius 5 or 10 it has a repair mode for heavily sulfated batteries, You Tubers claims it works and has revived their batteries.

[@WelkingVue]

Thanks for the information.

[@kaantek499]

Hello I don’t inter stand I charge but it’s still in the first red light… can you help ?

[@babayega_]

These Noco 1 and 2 are for upkeep. They're not strong enough to fully charge a large battery. The amp is too low. You can put it on for 4 to 6 days and it will charge it very slowly.

[@ssplatin1]

Need to add distil water and then charge it again

[@saulpedraza645]

Not all batteries can be saved ,5hry fail in diffarent ways but thing is make the effort you never know unless you try , 5he noco brand chargers great units

[@Wergrun]

I had my genius 2 fully charge my 90ah rv battery

[@erich9063]

How long did it take to charge?

[@Wergrun]

@@erich9063 i think about 38 hours

[@erich9063]

@@Wergrun thanks for the reply. I’ve had my AGM marine battery hooked up for 10 hrs and it’s still on the first bar charging bar. Voltage reads 12.15V but I’ll give it some more time.

[@Wergrun]

@@erich9063 yea I’ve left it connected to my rv for like five days but it turned out to be a power sap somewhere causing it to take so long

[@Wergrun]

@@erich9063 let me know how it goes

[@ernestkooistra1559]

[@stevekoscielak1335]

I appreciate your video but like most people you talk way too freakin much! You could literally cut this video down in half!

[@WelkingVue]

I been trying to shorten recent videos and plan on it in future videos.

[@granjmy]

I thought he did perfectly. Just necessary information, no extra conversation at all. 😀

[@PeakyBlinder]

A 2 amp charger would need to be connected for about 24 hours, then run the repair mode then re charge it.

[@WelkingVue]

I don't really use this charger much at all. I recently notice it take a lot of hours to fully charge a drained battery. Then after charging it I test to see if the battery is still usable or need a new one.

[@pssa3215]

My 77Ah battery was fully charged after 24h with noco 2. It shouldn't take more than that if your battery isn't defective.