You're welcome!

It charges a dead car battery in 5 hours.

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

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.

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.

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.

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?

Thanks that's something to think about.

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.

@@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.

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.

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

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

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

Hi, Same problem today?!

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

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

@@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

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.

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.

@@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.

Thanks for the information.

just let it charge for days. it will slowly cycle through the desulfate cycle over an over until a satisfied full charge is achieved and depending how bad the battery is takes awhile.

How long did it take to charge?

@@erich9063 i think about 38 hours

@@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.

@@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

@@erich9063 let me know how it goes

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

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

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.