Both batteries were completely drained but this did the trick!!!

I tried jumping a dead battery

in normal use the cables can be attached wrong (i.e. negative cable to positive battery post) without consequence

Saw this product on Velocity TV and was amazed at how quickly it fired up a the vehicle with dead battery

I also work on cars and it starts them like they have a new battery.

It had started my truck multiple times (on a single charge) when one of my dual batteries went bad and I had to start/stop in the process of replacing that dead battery

I had a faulty battery on my

Not needing a second vehicle or jumper cables to start an engine with a dead battery comes in very handy.

But if the battery is completely dead then it won't work.

Why would you make a jumper pack that only works on weak batteries and not on dead ones too.

If you hook this up to a completely dead battery that won't even register voltage on the screen, it won't work

I've frankly used both the GB150 and GB40 far more often on other people's vehicles that I came across with dead batteries in parking lots

Holds a charge for a long time and has jumped various diesel trucks and a motor home with completely dead batteries.

Will only jump partially dead batteries

Never going to be caught with a dead battery again.

Then a couple months ago when it got cold my wife got stranded at Walmart in her little gmc envoy wouldn’t start battery dead

We went to an equipment auction and saw a 35-Ton Diesel Crane and the battery was dead, got this thing out and started it in two attempts

Was able to use the next day on a long dead battery

And once I jumped the same vehicle 4 or 5 times with the GB40 before it had to be admitted there was a problem other than a weak battery that caused the engine to die after I'd gotten it started multiple times

Lately , for the last 2 years , I have been dealing with a failing " battery saver module " in

I've been struggling with a gremlin in the electrical system in my 18-year old BMW 540i that's given me way too many opportunities to find out if this product can start a car with a 4.4L V8 and a dead battery.

Excellent price for powerful and useful battery booster!

but if it's not going to work on a dead battery what good is it

Battery can be dead as a door nail and it will jump start the motor without any Struggles.

I used it very often, even when a vehicle that have a dead battery and a bad alternator I have used it as a power source

If battery is completely dead this jumper doesn’t allow it to jump the battery

This is a “bull” of a battery charger that could crack the Titanic from where it rests today!

I think we ended up starting 5-6 vehicles including a '99 Suburban, and a few larger pick up trucks over a few hours, battery on the device NEVER LEFT THE GREEN - never struggled or had to re hook up and jump again etc - as we often have to do with other devices.

seems like the battery is dead

Don't waste your time reading the reviews for people who use it on partially drained batteries.

if you're out and about and have a dead battery.

The Jump starter can even jump a completely dead battery!

Started a dead battery instantly with the push of a button

And not having to "attach" your vehicle to a dead battery vehicle via jumper cables is also a plus in my mind given the amount of computer issues that may crop up due to bad jumper cable connections

wasted over $500 for these jumpers and it's doesn't jump a dead battery...

The battery on my Toyota Tundra was completely dead after my son left the door ajar for two days

dead battery's ... did not miss a beat.

The GB150 is a very capable battery booster.

If your battery is completely dead the noco won't sense that a battery is there and therefore will not put out voltage

Supposedly, this system is supposed to prevent sparking unless you override the system and turn off its safety features on a fully drained battery (below 2V); however, on the first crank it sparked significantly and suddenly.

Did nothing for my car, the battery was totally dead so the hood old jumping using another car worked but not this one

The battery was dead.

On the plus side, it has built in safety features for jump starting such as a volt meter that shows the state of charge of the dead battery, state of charge if the engine starts and the alternator is charging the battery, and sensors that won't send power to the cables if they're connected incorrectly, or if the clamps touch together

Tried to start a semi with dead batteries

Since I got this pack, I had to start two semi in cold temp with dead batteries

The only trouble I get the jumpers out for are for machines with known weak starters and completely flat batteries.

For the longest time I believed like many do that just driving around for a while would charge the weak (10 volts or less) battery back to it's 14 or so optimal voltage

After you jump a diesel, it will drain the battery and you'll need to recharge it, but man, when you need it, this is awesome

This is great if you have a working vehicle without a dead battery that doesn't need a jump.

this little guy hasn't let me down yet with the exception of totally dead battery's but it already stated it can't jump

Since then I've run 12V boat stereo a couple hours off of it, and jumped the car 4 times during a bad battery time.

did it start right up, it measured the battery output to let me know if the battery was bad.

This jump box is less than one year old, I jump start one vehicle and the battery is dead

The battery went bad.

Used the GB40 to start a 3.5l engine, battery was completely dead, no problem.

Update: Saw someone that needed a jump and was able to jump their car on a dead battery with ease.

Overall works ok if battery isn't fully dead

Great battery booster

I had to add some juice to my dead 5th wheel battery in order to raise it and hook up the hitch

This thing will start a completely dead battery without even having to wait for it to charge the battery up, and the voltage readout is very handy

F350 6.0L Diesel with dead battery

It turned out both of the truck's batteries were completely dead and this charger was able to start the truck at 50F out door

It also faster battery life out for only charging cell phone couple of days

If you read more reviews many have had problems with the battery self destructing, leaking, expanding, and so on.

Just if your going to use it to jump a flat dead battery without any volt reading it will suck a lot of juice

It had high reviews and would be great item to have as insurance in the event that we kill the coaches batteries while boondocking

But couldn’t cause I found out I had a bad battery

My father in law had a 6.4 powerstroke sitting for over a year in the lot at his shop, the batteries were 100% dead

The batteries were completely dead, not even enough power to drop the steps

Just yesterday I tried it, following the instructions for use on a dead battery, and it did nothing.

Most of the vehicles jumped were slow cranking units and not shorted batteries

Used product to jumpstart my envoy that was having issues with draining my battery

Well three times my Chevy (3500) pedestrian van had a dead battery

My truck's battery was really dead on the coldest day that we had in DC this year

It started up my dead car battery with absolutely no issues, I used the bypass and that got it going

With a old style "jump box" the unit would put out voltage and jump something that has a completely dead battery or even run a winch without a battery.

But if the battery is really dead, it's not so automatic.

My daughter has a Dart and sat for the entire cold spell and battery was beyond dead and this started it right up.

I had to buy this after the batteries were dead on my boat and someone else had one and let me use it.... these batteries were toast and it still jump started it

: Had a dead battery on my Ford F-150 4x4 yesterday after it been sitting a long time

something.the only time it does something on its own is if the engine being jumped has a good battery that is slightly low and probably

can jump even if the battery is completely dead

This will jump your dead dead dead battery in a split second

Surprisingly this good looking battery can NOT start

Well yeah, there are batteries that are only half the size with the same capacity, but keep in mind half of the GB150's size is to accommodate the circuitry needed to deliver high current for a jump start

The built-in voltmeter is awesome for determining charge state of dead batteries and also easily checking alternator function after the engine cranks over

I had a car that was sitting with a dead battery for a little bit over 7

I really liked that this jump starter actually showed the voltage on the battery before jumping to see how bad the battery is

Ended up with a dead battery on Monday

Plenty of power to start my truck with a completely dead battery, but unfortunately it quit working after a year and a half with only a couple uses

I have now used it to just our smaller shop truck a few times and even my 2011 dodge diesel when the cold drained the battery

I work at caliber collision, and I’m constantly running into dead car battery’s from wrecked cars, so a lot of the times they’re often completely dead

In the last 2 days I have started 2 irrigation motors, 3 pickups 1 being a gas and one diesel with a done battery but other was still good, and a low battery on a magnum case tractor (I'll be

" button (or even better, do away with the button and make automatic mode handle really dead batteries automatically!

Whenever a car battery (or any rechargeable battery) drops below a critical open circuit (no load) voltage (for 12 volt batteries this would be around 11 volts) internal damage begins and if one has a vehicle which drains a battery below this critical voltage (called a parasitic draw) you lose capacity every time a (what i call a destructive discharge) occurs

I've used it on everything from atvs to large diesel tractors with weak batteries even no

Especially since it also doubles as a portable battery bank to charge devices like phones, tablets, and simple feature laptops if they use type c or USB charging of any kind

It was like I had put two brand new batteries in the truck

say it looks good and powerful but doesn't do jack for a dead battery.

Don't waste your time reading the reviews for people who use it on partially drained batteries.

seems like the battery is dead

Fast and reliable battery charger

My wife had to use the extra boost feature when our Outback battery was completely dead, she was at the house

Snap-On jump box, starts large 6 cylinder diesel forklifts at work like it has a new battery

Had another regular jump box that wouldn't budge a larger diesel pickup with a dead battery

I know that has one gas a problem with a bad battery after 1 year warranty runs out.

Jumped my big dead battery in my diesel car in a second.

The purpose to this purchase was to be able to start a dead car battery however if the battery is complete dead this item doesn't provide any power at all to juice the car battery so what the purpose to this jump box

Bought this to possibly try to crank diesel dump trucks with dead batteries

I find it easily jumps my 9860 STS when the battery gets weak as well as smaller machines

I work with supercars and many of them see very little driving which means many have weak batteries

The batteries on the diesel weren't even dead, just didn't have the reserve capacity to start the motor on their own.

Jumped a 2010 F250 6.4 diesel with 2 dead batteries

That readout is great to let you know what shape the dead battery is

My truck had been parked for 12 days without being started , and the batteries were completely dead

no kick over or even lights from deep cleaning my truck the jumper worked like a charm hooked it up and started my battery with

Comes Barely charged and yet it still turned over a dead battery !

However, recently I was able to put it to the test by starting an 8.6 liter, six-cylinder diesel on a field tractor with dead batteries.

and it would not start, cold (18 F ) and the batteries don't like the cold.

After seeing a video on YouTube of this jump starting a school bus with dead batteries, I was sold

If the battery is COMPLETELY dead, you might need a 2nd jump box (even if its a cheap one) and the car will start right up

Doesn't work on dead batteries

I might have only one shot at it given the smaller capacity but the boxes work so well at "dumping" juice into the weak battery(s) that I wouldn't be surprised

Tried this twice when I had a dead battery and it didn't work either time, despite storing the device in my house and being 100% charged

The override to have it work even with a heavily drained battery is a great option too that I've had to use

the “safety” if the unit fails to detect voltage on a completely dead battery but the unit showed the voltage just fine and the battery was not completely dead

Lastly, I have some electrical issues with my V10 triton F750 chassis RV, with the engine battery dead and the house batteries dead...this thing has started it going on 5 times last season

A well designed solid battery charger which strongly recommended !!

battery dead or empty and will not charge.

Twice I've had to use it lately, this morning for instance, for a totally dead battery from someone having left the car key on over night and in both instances the unit would not turn the car over

and I'll be a monkeys uncle, it worked; , it turned the engine over as if my completely dead batteries were new

I have had some jump starters in the past that were crap, wouldn't turn over an engine with a half dead battery.

Struggled to jump start the motor when the battery is low and for get it when that battery was dead with others but not with this Jump pack

The first time I used it, I had placed a completely dead battery in the truck

But the consequence is that your alternator is working overtime trying to charge the weak battery and still power the things that need to have power at the same time

Once the days get cooler and the BSM activates it completely drains both batteries in my truck in about 2 days while my truck sits unoperated

I got stupid and left some things plugged in to charge inside when the vehicle sat for a day or two and my battery was seriously drained

if your battery is dead or below 1/2 charged, don't expect anything from these so called jumper

Well the battery on this fellows car was really bad

I've used this jumper box to start my Ford 7.3L IDI Diesel with dead batteries (the truck has 2 big batteries) 3 times now on a single charge, and the indicator lights still show the jumper pack to be fully charged

To date, we have been able to revive many (6 batteries), but not all, damaged and/or drained batteries.

They can be a real "B" to start when the battery is dead dead

Our own fault but the NOCO GB150 battery started it without breaking into a sweat

Helped a friend raise the tongue jack on her horse trailer with a dead battery so she could hook up to her truck.

After I started my car car twice in 2 weeks ( completely dead battery) without a recharge!

Works good, started a tractor with a dead battery in cold weather, I was skeptical when purchasing, that something so small can pack that much power for

But if someone's got an old car where leaving the lights on can drain the battery all the way

It was that I relied on it to bail me out if ever in the cold weather I had a dead battery.

I have now used it to just our smaller shop truck a few times and even my 2011 dodge diesel when the cold drained the battery

Has not jumped a dead battery rated well below the GB150 ratings.

This is awesome it jump starts dead batteries as said without any problem holds its charge as said love it

The GB150's battery had swelled and the plastic case had split

This started up my RV with a dead as door nail battery with no hesitation

Bought to give myself a jump for a dead battery for a car that I don't drive very often

The next dead battery was one year later in December 2019, one month after the GB 150 went out of warranty.

It did not do what they said it would do not enough battery power to just a regular car

It started my 2013 F150, with a completely dead battery within seconds

As my batteries were failing (turned out to be a corroded alternator terminal

It will start your dead car or truck battery.

This noco boost any car truck battery

Only downfall i have noticed is the button for the build in light, very easily turned on while in back of truck and drains the battery.

Dead battery to no battery at all, no problem

Amazing - jumped a dual battery Humvee H1 with completely dead batteries that has been sitting for 2 months.

This battery couldn't give me a faint click, dim lights, or any signs of life whatsoever

It gets cold here in Maine and my batteries were drained

How many times have you grabbed your auto parts store battery charger and set it to the “engine start” mode, only to have it not turn over the first time and you have to wait for it to boost your battery

Best thing this unit has done is prove to me it can start a 6.7L power stroke with 2 flat dead batteries

The truck sat for 6 weeks with the alarm set and drained both battery's

Due to surgery recovery, I wasn't able to drive for an extended period of time, and I couldn't always get out to start the truck to make sure the batteries were good to go.

I purchased the GB 150 in August, this December, we had a cold spell and several of my friends had trouble starting their cars due to bad batteries

Has not jumped a dead battery rated well below the GB150 ratings.

I borrowed the same model to jump my 5.9 diesel and with both batteries dead, this ran the glow plugs and cranked the truck as if nothing was wrong, even though it was about 20F.

n’t blow up your battery or your booster

Lighter adapter can be used either way--to charge the booster from a good battery, or to charge a battery from the booster

needed three well-charged battery at 700 amperes each, but this kid copes without problems

The reviews that says it won’t start a completely dead battery didn’t read the instructions, you can jump a car without a battery if you want too

I have a BMW 335d and had a dead battery at work

Will not jump off a dead battery

I've used the heavy lead acid booster packs and while they do the job, try running back and forth every time you go to get a vehicle lugging that around just in case the vehicle has a dead battery.

always dependable when the batteries of my SUV go dead

Does not serve as a portable battery source when using clamps

Have jump started multiple 7.3 and 6.0 Powerstroke diesels and even used it on a 425 CAT and 300 Cummins with completely dead batteries

To date, we have been able to revive many (6 batteries), but not all, damaged and/or drained batteries.

Tried using it to start my generator to charge up my two dead batteries, no go

Well the battery on this fellows car was really bad

battery is dead

it's not worth carrying the weight in our small cars; i am a bit skeptical about jump starting my duramax if i totally lose the batteries for whatever reason; the water test yields like double the gallons moves vs the small 1000 amp model... is it a good lithium pack?

We had a day that was -20 and my 2006 Expedition had a dead battery and this started it no problem at all.

Couldn't even start a truck with half dead battery before overheating and the RED light started to flash within 3-4 SECONDS, with fully charged

may kill battery if ur not super careful

A guy from work picked this up and it started an RV with 2 completely dead starting batteries that had a Caterpiller diesel motor.

Does not work properly, battery doesn’t charge

Barely started a car with a dead battery

I have a gb40 that’s worked as

Already usd it to jump start my daughters car after the battery was fully drained as she left the lights on overnight

Slow as can be to charge, does not actually come with a charger, that's extra

After the initial charging when it arrived which took longer than I expected it works as it should, getting a few more (the GB40) for the other vehicles just to have them.

This thing...battery was below 6 volts, less than half, and cranked up as strong as if it were a brand new battery

n’t be sad.

Jump box works great fingers crossed it does t fail like many of us had

n’t be sad.

Jump box works great fingers crossed it does t fail like many of us had