it took a good day, however the battery since clocks in at 13.4V after charges, and hasn’t died on me since

The other 4 went to bad battery mode after charging, refreshing and charging again.

wow, this 10A controller will charge your batteries very quickly

With the Noco 10 I put it on force 12V and successfully charged and revived the battery

My old charger had a 50A "Quick Start" boost function for really dead batteries to jump the car.

I was not successful in reviving an old battery with the repair mode.

I had a dead battery.

This device may maintain batteries just fine, I don't know about that, only that if you are trying to restore 6v and

At first I thought it could not revive my battery - the charging light went to green really fast then started over

With the break down within about the first 6 months, the possibility of some 7 weeks after failure before I get a replacement, the failure to work on the one dead battery, the appearance that the repair charge does not appear to get me closer to 100%, I cannot say that I am pleased with the purchase.

I had a completely dead battery in my Harley

Well worth the money for safe battery care, maintenance, and repair.

3 months later the charger quit working and my batteries were drained down to 0 volts

The 1st was a smallish, lead-acid AGM (gel) battery for my snowmobile.

The battery was too hot to touch and I had to allow it to cool before removing it from the car

I like the fact that you can force start on a completely dead battery.

I have used it on 2 different regular lead/acid batteries and it did not charge either one

I initially planned to start by reconditioning the battery, but the manual recommended fully recharging the battery before a recondition

Keep in mind, a bad battery can have physical internal damage, like a plate breaking and causing a cell short, or it can have excessive sulphation that dramatically cut power the battery can produce or in severe

but it's NOT really can charg the Dead battery

I did try to revive a few dead and nearly dead batteries I had accumulated, was unsuccessful 4 out of 4.

Works great for maintaining or charging dead batteries

Remember it isn't like chargers you can buy and keep in the car in case your battery is dead in the airport lot when you return

GENIUS10 had an LCD read out to let you know the battery current voltage and what it is actually doing more than colored lights... however I cannot complain since it did "work" and brought my dead AGM battery back to life!

My Camry hybrid 2015 got the battery dead due to not driving for 2 months

The NOCO GENIUS 10 charger is a nice and compact battery charger

One simple 12v semi-dead battery and the Noco failed.

I liked the ability to revive batteries that weren't maintaining a charge.

I couldn’t even jump start the Cadillac, because the battery was too depleted

It took over two days for this to charge a battery in a CR-V. Considering this car seems to drain the battery quickly when sitting, the charger is charging the battery and running the latent electronics simultaneously

I bought a pair of the Genius 10 chargers after replacing my sump pump lead acid batteries with AGM ones

So this adds the option of some practicality of using to bring back a dead battery faster

This is a fantast product and has greatly lessened my fear of having a dead battery when I need to go get more soy milk

I have recovered dead batteries for 3 cars and a motorcycle with this thing

It can charge multiple chemistry types of 6 or 12volts, and it can not only charge, but can also rehabilitate older batteries as well

I was able to jump the car with a portable lithium battery booster, however I needed to buy a charger to try and resurrect the dead battery.... that was only posting 2.5-3V of power

Was able to bring a dead battery back for my pressure washing trailer.

I read many reviews about this charger that said that it could revive and repair sickly batteries

First of all you can tell if you accidentally cross connect it so you don't damage the battery

Charges my batteries no problem

So if your car is sitting in your garage with a very dead battery because somebody left the lights on for a week it will bring it back, so you can use it as an alternative to jump starting the car if you are not in a big hurry

Automatic - intelligent smart battery sense

My battery was completely dead

The batteries were too drained

I need to recharge my Mazda 3 dead battery and it was super simple

It’s easy to hook up and operate and the cost is more than justified when compared to having to replace expensive RV batteries.

The NOCO Genius 10 is an excellent battery charger

Of course the battery kept draining

They also have a Desulfation setting that can repair many "dead" batteries back to use.

After using a Schumacher load tester and determining that the battery was very weak, I bought one of these.

Works great and several different battery types.

agm battery was completely dead, this charger "repaired" and fully charged it

It gets the job done for all of my vehicles - even the sorely depleted battery on my (seldomly-driven) truck.

It does its job, it revived a dead battery, plus it helped my other vehicles make it through the cold winter.

I use it to keep my battery charged during the winter, when I drive my car a lot less and it seems to drain the battery after 2 weeks of not driving

Although these can charge quickly, they are not intended to jumpstart vehicles with dead batteries.

boats notoriously have draw/battery issues where I work and the repair mode actually works really well it has saved quit a few batteries in the month I've had this unit... if your on the fence I highly recommend this charger

It also tells if a battery is dead

Disconnected in morning and tractor started like it had a brand new battery again

The Noco can repair the latter condition, but not the former condition but without opening up the battery, it is near impossible to know why the battery may be faulty

Figured the battery was ready to exchange for a new one and since it turned cold, was struggling to start the truck.

Amazing all in one maintaining any battery you own.

Brought back 2 very dead batteries back into service.

Charged dead battery in an hour.

You will need to read the directions that come with this charger as it does so much more than allow you to start a dead battery

Brought my dead battery to life in less than 2 hours.

It Charged a completely dead battery of my F150 in 10 minutes.

COVID19/working from home for the last year killed my Chevy Spark battery

I have recovered 2 batteries so far and it is working on a 3rd battery even though i have only had it for less then a week

After a full charge with this charger, the battery has been just fine

The first two weeks the charger worked good charging dead batteries, but after the Second week the charger had trouble charging and it would turn off by itself

Have tried it on everything from dead batteries to charged batteries and it will never come out of stand by mode.

I started the car and let it run for about 5 minutes when the battery began to smoke

I bought it for my solar generator setup, but my pickup truck recently had a drained battery from the dash cam I left on

To top it off, the dealer had left some lights on inside the camper and didn’t shut the 12-volt system off, so the battery was dead-dead

One final note is that you need to disconnect the battery from you car before the charger will work properly.

It brought back two dead batteries to full power!AND in just a couple hours!I don't know how the heck they work, but compared to old chargers this thing is amazing

It brought a dead battery back to life and it’s strong now

Five hours after attaching it to the drained dead battery, my vehicle was breathing fire again

Selected this one of many in Amazon because did not say it wouldn’t charge a dead battery

i needed a battery charger that could start charging a dead battery

I haven’t had to use it to recover a battery yet, but I like knowing I can when I need to

It wouldn't charge an older battery very well, and I heard that this device could not only top off the charge but also potentially restore some life to it

IF YOUR BATTERY IS NOT DAMAGED - and the way you'd know that is whether it holds a charge or not - YOU WANT "12v Supply".

A good battery will show a Solid Green light.

The first time I was able to bring back a half dead AGM battery to life and since then I am using it to keep what I have charged up.

Bought this to try to revive a dying battery that had been sitting in my car mostly unused during the pandemic

My battery is not old but my car sat idle for 2 months and had to keep jump starting it with my portable battery pack

I had to use my Schumacher charger to top the batteries off

Like the fact that the charger does lithium batteries as well as age and flooded lead acid batteries.

I connected it to the weak battery and it came up and worked correctly

Easy to use and very efficient battery charger

It made two attempts and in both cases reported the battery as bad.

Absolutely phenomenal battery charger

It took several hours (but remember, my batteries had sat idle for months

6V AGM battery in my '28 Model A. Left the lights on and ran the battery down to less than 2 volts, and a "regular" charger won't work when the voltage is that low.

The first hour seemed fine, but the next morning the battery was too hot to touch.

Switching back and forth between two cars, batteries are always topped off.

It charged the near dead battery (Interstate closed cell battery) in about 40 minutes

I have expensive batteries I wanted to keep maintained, and to use the charger to power my rv when the batteries get low

this is a battery charger for the newer tech smart batteries, and all I can say, is it works

Works exactly how it says it does charged my dead battery in less than an hour.

We didn’t drive car for almost a month and drained the battery, even though the hardwire kit had low voltage

We'll both the sealed and the vented battery swelled up, not even sure how the vented battery swelled, but it did

I opened the box, plugged the charger in and charged a near completely drained 12v car battery

GOOD - YOU'RE GOING TO DAMAGE THE BATTERY AND LIKELY CAUSE MORE PROBLEMS.

I’d say it took between 24 and 30 hours for my dead, dead, dead battery, but it pulled it out of the grave, so overall a better cheaper purchase for me than a new battery.

It will safely recharge an essentially dead battery which is what you would expect

So I brought the car with AGM battery in for a full battery testing and learned that the battery indeed suffered some damage by sitting during a good portion of the pandemic (i.e. don't make the same mistake I did and let an AGM battery sit too long).

A quick read through the directions and just under an hour later, my battery was good to go, and my truck was able to start

maintained.i have a battery tester and I tested the battery if its good or not I tried charging the battery on my other trickle changer and i tested it

The first two weeks the charger worked good charging dead batteries, but after the Second week the charger had trouble charging and it would turn off by itself

but if the battery is death

I bought this this to try out if it could revive my battery and so far so good after i used the repair mode I tested it again on my tester

You do not need a second car to jump start.10 amps is still in the “safe range” for slow charging and less likely to damage the battery

I never saw more than 15.3 volts over the 4 hour period it's in that mode and there was very little gasing in the cells, the battery didn't even get warm

My battery wasn’t just discharged, apparently, but dead

In less than 24 hours, this charger breathed new life into a dead battery.

When the alternator on my truck quit on me, I was relying on left over power from my battery to carry me back home and thanks to this device; it probably saved me not only a tow truck fee to the mechanics garage, but also the price of a new battery and time heckling with the mechanic.

Looking forward to bringing back dead batteries with this unit.

After completing the repair process, the battery read state of health at 69% (415 CCA) and diagnosis of "good battery

Then i simply used this directly on the bad battery

If your battery isn't dead, you may get a spark, that's fine.

It works fine with lead-acid battery.

Amazing product, I'm not sure you can get a better battery tender for the price

It does its job, it revived a dead battery, plus it helped my other vehicles make it through the cold winter.

Helped bring back a really dead gel battery

The larger ones can jump start also, but NOCO also makes some compact and powerful jump starter batteries

Have used it multiple times to top off batteries in infrequently driven cars

A DRAINED battery is likely if your car (or whatever device) hasn't been driven or even turned on in at least two weeks.

I had 3 car batteries and 2 UPS battery backup systems that had bad batteries, it didn't restore any of them

Revived two dead batteries to date.

If you fail to use the charger properly you will damage the battery.

Unit overcharged batteries, overheating and leading to potential serious damage

The manufacturers of lead acid batteries put out a specification with charging voltage.

It also has some cool features in it as well, for instance, if you have a totally dead battery, which is very bad for lead acid batteries to drain them totally flat, but you can put the charger in force mode, that will attempt to put enough voltage into the the battery to get the normal charge mode into action and bring the battery back

However, when we need it we do so the battery is usually dead

But this charger has the technical smarts engineered inside to charge and bring a unhappy battery back to happy status, within reason

didn’t work as the battery was completely drained

Oh and it charges up dead batteries too

I replied, " once every 2-3 months, but my battery is always dead

I had a dead battery that was leaking and it was totally dead

lead acid batteries, this won't do it.

And the battery has been like brand new ever since, which right away made the price worth it

Worked like a charm on my 2018 BMW 330i that had a dead battery due to not driving much during covid

Already used shortly after buying and charged a friends dead battery

" I have 3 other chargers and all of them say Bad battery

Bought this to bring very low to near dead car batteries back from the edge during "the after times" and this does the trick

The 12 volt battery is over 5 yrs old, and I started to notice the battery was slowing down when starting.

Perfect for the 12 volt lead acid battery in my camper

I have a car that doesn't like cold winters, and the battery can be an issue

I have used it to bring a couple batteries back to working condition after they have been dead and sitting for over a year.

I have recovered dead batteries for 3 cars and a motorcycle with this thing

Concerned that this might happen again, as the last time I replaced the battery was for a similar reason, I decided to try this plug-in charger instead

So this adds the option of some practicality of using to bring back a dead battery faster

Best battery charger

my toyota camry was having alternator issues and ended up sitting with a dead battery just about all of winter

The battery was sizzling, Charger overheated battery and charger

most chargers do not start charge a dead battery, safety issue where you can't reverse the leads

My wife left the headlights on our car for several days while we were on vacation, only to return to a dead car battery - that was only 6 months old and higher-end AGM with 750 CCA

The battery in my lawn mower was completely dead

The battery feels powerful.

Keep in mind, a bad battery can have physical internal damage, like a plate breaking and causing a cell short, or it can have excessive sulphation that dramatically cut power the battery can produce or in severe

I did try to revive a few dead and nearly dead batteries I had accumulated, was unsuccessful 4 out of 4.

Worked great, read it repaired a 3 yr dead battery?

I discovered the inferior battery.

As a bonus, it has so far succeeded in resurrecting the bad battery I had

I had to use it on two bad batteries and it worked where my other chargers would not.

I killed my truck battery and this did a great job of restoring it

This is a great battery charger

This charged a dead truck battery in less than 2 hours

Also does not blow up batteries that are too broken to be charged, so that's a good plus.

The 1st was a smallish, lead-acid AGM (gel) battery for my snowmobile.

It can also force charge a depleted battery

This thing also saved two very expensive lithium 12v batteries from my ATV and motorcycle that all three of my other chargers said were bad and couldn’t charge since they were discharged down to 4v

Granddaughter had an old car had a totally dead battery showing 4 volts

My old dumb battery charger would get the new battery charged and the Prius would start, but the problems continued

wet lead acid battery and NOCO 10a charger

The Noco brought it back and my truck starts like there's a new battery in it

In that time my battery drained due to misc energy use by dashboard electronics and some 12v interior lighting

Also, the manual doesn't make it clear that a flashing GREEN light means the battery is not fully charged or failing.

I took two completely dead batteries out of my swamp buggy and it brought them back to fully charged

I could tell from the sound that the battery is now very strong and healthy

But I have to admit, it has revitalized a few batteries already and has proven to be worth every penny

Purchased this to desulfate and repair a couple lead acid batteries

Hooked it up & charged, battery was like new

I have chrysler SRT8 that always drains the battery

It's good to top off the battery overnight.

It fixed the battery in 20 degree and lower weather here today too which shocked me as well

No more worries of dead batteries

It managed to salvage 2 dead batteries so it is worth it!

My 12 year old SUV had a nearly dead battery requiring jumps

My battery had died from lack of use

I popped the caps and topped off all the batteries with distilled water, and nothing changed to the batteries, so I drained an used battery acid (33%) and attempted to restore again, nothing changed.

It has lots of charging options, including recovery of a dead battery

I gave a friend an old dead deep-cycle RV battery that I had replaced.

Great for maintenance charging and topping off AGM batteries.

The issue I have it the charger should be smart enough to turn off before it causes the battery to overheat and it should refuse to charge a badly damaged battery

I have not had the experience it using it to boost a battery yet.

I just leave it connected, to keep the battery healthy.

Restored my $165 ac Delco battery in my truck after it wouldn’t hold a charge

Just a few 100Ahr lead acid batteries cost over $500, and in no way will I allow this piece of crap charger demise them to half their life!

I have been hanging on to a 'new' battery, and this device just told me the battery is ready to be turned in for recycle

Each of my batteries are smart batteries which mean I can connect via bluetooth or smart screen to monitor battery outgoing/incoming voltage, amps and battery capacity

Gotta say I was surprised that the battery now seems perfect.

I put it on a completely dead battery and set it for restore

Rejuvenated 3 batteries already

Nice sweet addition to our little camper van with solar, main smart battery isolator and 4 AGM's

With this newer charger, if you have a dead battery, you can manually tell it to begin charging

Charges, fixes dead batteries and maintains your car battery on the car, seemingly improving performance while it does so - more important in these COVID times when you may not use your car as much

Worked great charging a dead battery as well

Has saved me a lot of heartache dealing with dead batteries.

Simply used this charger to charge the good battery and used jump cable to extend power from this to the dead battery

I’ve restored several “dead” batteries and the various functions of trickle charge are great

Whether it be Lead Acid, AGM, Gel, Flooded, Deep Cycle and Lithium, the NOCO Genius 10 can charge, maintain and repair batteries

Not his car is running great again and battery is holding a charge and working like new.

revived a completely dead battery that sat for a year

Well I had a few batteries that were drained down to "

With the Noco 10, I was able to charge the lead acid battery from a completely dead state to 100% SOC, 100% SOH - the charging and boost feature worked great!

I used the battery from my other car to trick it into charge mode

At first I tried the popular Black+Decker 25 Amp Battery Charger since it has an LCD readout of the battery Voltage and Percentage, was advertised to work on AGM batteries, and offers a battery "recondition" or "recovery" mode to help a dead battery recover it's ability to hold a charger

Your battery will be fresh and waiting for you after a period of no usage

My battery was completely dead due to a dashcam that is hardwired to power

I bought this charger for maintaining the Optima yellow top battery in my Jeep and the standard battery in Wifey’s car

revived a completely dead battery that sat for a year

I have a number of old cars and a number of drip chargers and when batteries go bad, it can take awhile to recharge them.

case you have a dead battery at an inconvenient time.

The battery was so dead a cheap die hard trickle charger couldn’t charge it

The charger has worked well in charging Lead Acid AGM and LiFePO batteries.

Once you understand how to use the one button that caters for all needs, this is a great battery charger for 12v and 6v

This is a good battery charger and maintainer, if you have a viable battery.

It does the lead acid batteries very well, I have yet to use it on Lithium batteries

It was so much easier than pulling out our big rolling charger that we normally use on dead batteries

There's a difference between a DAMAGED battery, a DRAINED battery (as in there's no charge at all) and a LOW battery.

Simply used this charger to charge the good battery and used jump cable to extend power from this to the dead battery

Tried the charge/repair/charge cycle, and I'm happy to say it looks like it managed to revive an 11 year old car battery

Great battery charger.

I had a question about when in maintain mode at what voltage does the batteries drop to before the charger comes back on to top off the batteries the company replied right

I have an older Genius-brand smart battery charger that’s similar to this one, but it does have one flaw

A DAMAGED battery is unlikely if this is the first time you've had an issue.

but I think the battery is the problem.

Good quality, easy to use, can force charge when battery is dead, and accessories to make charging easy

I tied to recover 2 different batteries, one that had been flat for less than a few weeks

The battery was so depleted I had to use forced charge mode for a few minutes and then switched over to normal charging

Worked great charging a dead battery as well

The only drawback is it will not charge a completely drained battery

so I don't accidentally overcharge or explode my battery, etc

This small device was able to charge certain AGM batteries that my main SNAP-ON Chargers said 'bad battery' when connected

following is my original review.i bought this specifically to charge my two new, very expensive battleborn lifepo4 house batteries in my camper, only occasionally when i have shore power and not using my solar.this thing got HOT, very hot, too hot to hang on to.

Used it on dead motorcycle 6 volt batteries with no problem, charged dead battery on 4 Runner with ease

worked fine for a while , then started giving the green charged light, after 5-10 mins the battery only had 5 volts in

, the noco fuse holder going to my positive battery terminal was VERY HOT TOO.

I had a question about my strange-acting battery, not the charger, left a note on the company's website with my phone #, and got a call back about two hours later

tech support guy asked how i moved battery if so hot i explained it has a handle

Fortunately, I caught the problem immediately; if I had left it in this state overnight, it could have ruined my (very expensive) battery, or worse, caused a fire while I was asleep

I bought a motorcycle brand new of this yer and the battery somehow is going bad and I contacted the dealer if it's still under

I replaced the alternator with an OEM, the lithium wouldn't take a charge, so I asked to have the battery replaced as well.

I decided instead of dealing with a big bulky battery charger I would look for a portable one

Just take the battery over to their vehicle and it works fine

At first you may be scared that your battery is dead

Oh well, better to know than have false hopes in a dead back up battery

Repair mode saved my dead battery

Top off your batteries periodically and you will extend the life

It even works when the battery is completely dead.

Best battery charger I've owned.

I bought this on a whim at midnight after unsuccessfully trying to trickle charge a very dead battery using a small jump pack and solar trickle charger.

Great little battery charger

Now topping up my Forrester’s battery

After coming out to a dead battery for the 2nd time, I purchased the NOCO GENIUS10.

This charger recovered my old car battery to a usable state and can keep it going for long time

This thing really does fix old dead batteries

I got this to resurrect a totally dead battery that wasn't able to revived using any of my existing chargers

Have not put this charger through any real aggressive actions yet (like starting a car with a dead battery) but I have put a 5 year old battery on the repair cycle and it did appear to improve it's ability to hold a charge on a vehicle that is driven not that often

For being a "smart" device, it's more like a smart A$$

Works as it should and having standard connectors to all of my batteries even better.