If your car wasn't used for over 6 month and battery is completely died you'll need to be patient.

like I did nothing car still would not turn over

As a photographer I often end up in isolated places with no cell signal and my prior car had an issue where the battery would act dead for no reason if I left the back hatch open for more than a few minutes (I suspected a software bug of some sort).Anyway, I bought this, charged it and put it in my trunk.

Many reasons including size, power, simplicity, price, etc.1) Easy - Car electrical systems are scary and so are jumper cables with sparks and noise and fear.

UltraSafe Portable Lithium Car Battery Jump Starter, read the reviews, and decided to make the purchase

It's worked great to start a dead car battery without the need to jump start from another car

Resorted to standard jumper cables and a friendly donor car.

This little thing made starting the car easy and stress free before I could get a new battery

My car was completely dead- not even the doors would unlock dead, and this small but mighty little guy got it started in no time

We took a chance, hoping that this would work since the car is in a garage and difficult to access.

To boost my Car, and it work.

Exactly why I had purchased this unit, great, nope, car didn’t even crank over when this was attached, the lights came on

Trust me on this, we have a few cars that come to the

Car started very fast when regular cables did not work

What were the chances that this old, low-cost unit could start the car when the much vaunted and costly Noco unit had failed to do so

this thing is junk will not start small car

when its at 100% charged, my car starts up no problem after being dead for weeks sometimes months

After needing to have cars jumped a number of times I bought this and figured we would never have to use it but to almost my delight we needed to start two vehicles within a week of receiving it

Car had been dead for 2 weeks while away.

This is a great product started my car right up and love that it's

so my car still dead

liked it so much brought another for my son's car and recommended it to other friends

2 weeks after receiving I had to put it into action -2 degrees and this thing started my car right up worth every penny

Doesn’t boot up with dead dead batteries won’t even attempt to charge to start the car completely worthless want my money back take your crap back

Greatest car product I've ever bought.

Hassle free way to start a dead car battery.

Not that you need to, because this will jump 4-5 cars in a row, but hey, why not?Now the secondary benefits for a car owner; Buy a mini air pump to fill you flat tire and snuggle it next to this in your storage area, because if you have a slow tire leak and a dead car battery both

My car was super dead the (not so great) jumper cables I tried

It might start a car, but to use it as a phone charger, it died before it charged my phone and only ran my tablet for a few hours when it was fully charged I

After three days my car was dead

Some car came with a jump but didn't work

Should be a wall charger and not a cigarette lighter, since it is purchased to start a dead car battery

Saves a lot of time and worth every $ ... have used it more than few times on mine as wells as friends cars ... so easy to use and delivers every time!!!

my car has refused to start on numerous occasions.

Hooked it up and the car started just like with its own battery.

Very nice and well made every car should have one!

Well the car and truck I tried failed to jump start

My past experiences with giving people jumps, my car would fail after

it has jumped everything from a tractor to mid size suv to a compact car and hybrid.

After two very cautious, but successful uses, the Boost became a comfortable and valued car accessory!!It is reliable, easy to use, easy to carry in the car, and provides assurance that I can start my car after periods of non-use

Tried to jump my dead car with this tiny little thing and it didn't work

After two very cautious, but successful uses, the Boost became a comfortable and valued car accessory!!It is reliable, easy to use, easy to carry in the car, and provides assurance that I can start my car after periods of non-use

the car would have been a nightmare.

It started my car just fine, then blew

you wont short the car or shock yourself if you accidentally touch the positive and negative together.

After doing this my car turned on and worked.

’s battery was very dead with the car unable to light up the dash lights

I have started a few cars with low batteries..worked as advertised.

But it does nothing to a dead car battery

not impressed, wouldn't jumpstart a car with battery completely dead

The 2.4 pound Genius started my car on the first try although I had to use the manual mode because the battery was so dead

absolutely a wonderful and small emergency car jumper.. charge it, stick it in with your spare tire (or what passes for a spare tire in the age of whatever two-bit bureaucrat has made real spare tires now as rare as a patriotic democrat..

it worked on a dead car battery and its great as a portable

If your car has been dead for awhile you will probably need to use it

I've started a classic car with a super dead battery (a 1960's "compact car") had to use the

This little device works like a trooper once fully charged it turned on my daughter's dead car

I waited for 3 weeks untill it arrived without changing the battery for the car just to make sure i try this one it was 100% perfect started the car without harm or weak

Needed to boost a car that had been sitting 8 months with dead battery outside.

On ONE CHARGE this thing has started up my dead-battery car at least 10 times

this is an amazing product charged my dead car battery in less than 5 minutes

Even if your car is working perfectly you should buy this for a rainy day and store it with your flat tire repair kit.

My car was dead in the driveway, but my neighbor saw my wife and I struggling to find a ground point since all of the points of contact were all plastic and the negative terminal was extremely difficult to get to

Just got this yesterday because my car was dead as a door nail

Also people, don't leave this thing in a hot car

I like the fact that I can use this to start my car when my battery fails.

Left it in a glove box for 4 months and it still started our dead car immediately after being hooked up

It detects a battery as long as the car is not completely dead, and all you have to do is connect the red clamp to the positive battery post and the black one to the negative post, push the power button, then go start your car

Worked perfectly, car started no problem

my car said the product only worked if the battery wasn't dead

My car was completely dead from lack of driving, so I had to use low voltage over-ride mode

My dad has used the GB40 to start a few stranger’s cars since I got it for

Used old-fashioned cheap jumper cables & the car started right upI bought it for convenience but its only 100 bucks worth of wasted moneyIm told Costco has a better on for 1/2 the $$$

I brought this out, and the car started on the first boost, though it was a weak sounding car

It retained about 75% of its charge and had no trouble at all jump-starting a dead car battery

I’ve used it on my tractor a dead car battery and keep it in my saddle bag on my motorcycle!

This little thing made starting the car easy and stress free before I could get a new battery

Great to use while my car is dead.

When we leave a car at remote trailheads and take off for a couple of weeks, its important to know that we'll be able to restart the car at the end of our backcountry trip, even if the car battery died in the meanwhile.

My son's car went dead and needed a jump.

This little jump box will run an entire electric car with AC on full blast for several minutes and barely deplete its charge

Both batteries were dead and one battery's voltage was too low so the unit could not detect, press the manual override button and the car started up just fine, love it!!

Great to have as a huge spare battery for power outages etc... and also a super easy way to jump start a dead car battery

Was able to start the car no problem

Worked perfectly, car started no problem

The biggest benefit is not needing another car to help you and the ability to charge other items (laptop, phone, tablet, etc)

This is one of those gifts that no one raves about until their car is dead and they use it & it saves the day!

I bought one of those portable car jump starter packs after my SUV wouldn't start one day, I had no jumper cables and had to call an acquaintance to help me

Had this in my car for four month and it jump started my car no problem.

I had to jump the car a total of 3 times to get it back home and the Noco worked perfectly each time

Soon enough all cars will have these

Every person should have one of these for those emergency "my car just died" situations.

Although I’ve had three batteries replaced, every time I leave the tailgate or the doors open for an extended period of time my car is dead

I decided this because my car has a parasitic drain

Soon after receiving this, I had to jump a dead car

My car has always been solid because I take good care of it, but during quarantine, I haven't been using it as much and the battery is old, so I was having issues with it not starting up due to a drained battery

This little device works like a trooper once fully charged it turned on my daughter's dead car

I bought a competing product only to realize that it wouldn't push 12 volts out to the mini jumper cables because it doesn't sense any voltage (as it would from a nearly depleted car battery)

My car sits in my driveway too long (stupid Covid) and the battery dies after a week.

It's been so long since I've taken my car anywhere during quarantine, and I'm a bad car owner,

absolutely a wonderful and small emergency car jumper.. charge it, stick it in with your spare tire (or what passes for a spare tire in the age of whatever two-bit bureaucrat has made real spare tires now as rare as a patriotic democrat..

it worked on a dead car battery and its great as a portable

Right after I charged this unit up and connected to to my completely dead car battery it started first time

The compact charger works effectively so far charging our cars and lawnmower.

I was blasting the radio while cleaning the car and it drained the battery.

She quickly grabbed her jump starter and boosted the car

Pressed the button with the exclamation mark on it, turned the key and the car started up like a champ

Love this charger, my car wouldn’t start after something drained the battery and this started it right up on the first try, it also still says it has 100% charge afterwards

start their cars as well

My car died a few weeks back...called a friend for help, and when he arrived, he pulled this small battery jumper out the pouch

A few weeks later the car was dead again.

This worked exactly as expected: press the button, power clicks on, car starts

Well the car and truck I tried failed to jump start

My car went dead from lack of use during Covid

As soon as I pulled out of my parking spot, my car died

I really don't think it will ever help start a car unless the car just needs a very slight boost

After an initial charge of 2 1/2 hours, it took me less than 5 minutes to connect the device to the terminals of my dead car battery and start the engine, so I could drive to the auto parts store for a new battery

I saw the reviews for this product along with that video from that man who jumped about 5 or 6 dead cars that had been sitting in his snow covered frozen lot for months

I attached it, turned it on, let it sit for about 30 seconds and the car started up just like normal

Turn my car in a quick ness instead of bothering

It started my Camry's completely dead car battery within seconds.

No way this thing could repeatedly jump several dead car batteries

/stressful situation diffuser when a dead car battery arises

My car battery kept dying and I used this great product to give the car a boost and it started up every time

It has revived a number of dead car batteries and even worked on my motorcycle.

will start your dead car

It started my dead car battery in less than 2 mins

Before this device, when that car's battery died, it was time for the jumper cables and pulling a card up to it, then waiting for charge to have been transmitted

Have boosted 3 cars and haven't recharged yet

My car is over 30 years old, and will intermittently drain the battery when I don't drive it for more than a few days; I have my suspicions about what causes it, but that's neither

I don't have another car or a car battery lying around, so guess Im out of luck.

What a bad way to find out the product doesn’t work, when you’re pregnant and stuck on the side of the road with a dead car...

I used the NOCO to jump his car as well.

Keep in house for possible dead car battery

-- it started my car no problem.

Worked like a charm, the car started within about one minute!

Due to the pandemic, quarantine, heat of summer, and hardly driving my car along with all of the electronics within my vehicle including a remote start has caused my car to be dead when I went to start it three times over the past few weeks.

Could not jump start my dead cars battery

works like a champ, love the size can normally get 3 or 4 cars out of one charge

No problem, car is jumped and ready to go within 2 mins

I’m admittedly not a proficient expert in the automotive industry, and just a female on top of that, but may I ask exactly how that cigarette lighter charger, which is located inside my DEAD car could possibly have seemed like a good idea to include as a charging source for a car battery charger??

Thankfully cars dead in my

I rate this in the Top 5 useful car accessories.

My car started fine for about 2 weeks

Both our cars were completely dead after not using them during lockdown and this brought them both back to life.

But with so much downtime, this portable car battery charger has become a necessary tool to keep around.

Since then the car has been behaving well, but it's great knowing that if it does have another problem, we're totally covered

I started my truck with this thing, let it sit for 3 months and boosted another car

My battery was dead (car that’s a 1.8 liter 4 cylinder) and I used this as instructed and literally it was as if nothing was connected at all

Almost not an inconvenience anymore, because this easy to attach battery pack will start your car

To get the thing to start I had to crank the car several times with rests in between, completely draining the NOCO.

Needed my car, manual overdrive worked like a charm

Neither of us had success starting our cars with totally dead batteries.

We're not technical but this started the car enough to get it to a shop for a new battery.

I have not had to use the unit I bought, yet I used a friend's unit to jump my completely dead car and it worked great

I bought this mostly for peace of mind, however, I've used it nearly a dozen times for both of our cars as well as neighbors cars as well as for my phone when the battery was almost dead

It worked fine for a couple of car boosts, but as soon as I started using it for a mobile charging station, it suddenly stopped working and would charge a phone or boost a car.

This makes charging/jump starting a dead car battery so much easier and faster, not to mention there not being a need to wait for another vehicle

I just bought a second one to keep in my car as well.

My car sounded like a machine gun while trying to start it which meant that my battery died so I used this jump starter and my car worked again

When it does provide enough juice to jump my car (a 2000 BMW Z3M with a straight six cylinder engine), it lacks adequate power reserve for effective ancillary jumpstarts (for example if my car were to stall out and need to be restarted before the alternator has time to charge the battery).

I have successfully jumped my car a number of times with it.

My car was frozen and the battery was completely dead.

It doesn't jump my car like its supposed to and its supposed to be brand new, such a disappointment

The last thing my frazzled self wants to do when my car isn't working is ask a stranger for help jump starting my car

I've tried this on a dead car three times without no sweat!

This week I helped a stranded lady jump her car with this when a weaker device failed

I warmed up the car but did not take it out if the garage as there is too much snow in the ground

Freezing temperatures, car is not starting, this thing is the solution

Very powerful and reliable for every type of situation, even if your alternator fails this can power your car until you can park it in a safe spot.

I had to use twice on my Mom's dead car battery & it was perfect.

That is the seller states: "In The Box - GB40 UltraSafe Portable Lithium Car Battery Jump Starter Pack, Heavy-Duty Battery Clamps, 12-Volt Car Charger, Micro USB Charging Cable, Microfiber Storage Bag, User Guide, 1-Year Warranty, and Designed in the USA

Well car wouldn't start this morning...electrical

This product now says it has no charge and we are stuck with a dead car.

No need to look for a nice person to stop and help as you wave your jumper cables...starts the car like 5 time on one charge... should be standard emergency equipment on every car

and I opened the door and pressed & held the start for the usual 2-3 seconds but the car failed to

Extremely useful and works very well for emergencies/car trouble.

It's small enough to store in the glove box if necessary , used this for the first time on my mothers dead car battery

Definitely beats playing musical cars and dragging out bulky cables.

Hooked it up to a dead car battery and viola.

I was stoked when I found this portable car battery charger for my old 2006 Lexus IS250 AWD that seems to have some sort of obscure electrical short that completely drains my battery so that this little gadget literally could not detect the brand new $

How come no one told me this existed?It was recently 30 below and my car was very unhappy and wouldn’t start for days.

If you will be boosting more than 1-2 car prior to charging then you should go bigger

Worth the buy, especially for someone who hates to be stranded.-Car was so dead that there weren't any lights nor sound

The car had been dead and unused for a couple weeks, so I needed to use the boost feature.

It can fit in your back pocket and start a car no problem.

Some times another car isn’t available and you may be physically blocked.

Had to use recently due to 2 weeks sub freezing temps and car not being used

Like most people, I am not driving my car nearly as much these days, so it wasn't a surprise that the battery isn't holding charge like it used to.

This NOCO Boost Plus GB40 1000 is more than sufficient to jump most modern cars, including the Prius I referenced

Light very powerful boost a car that was completely dead sitting for months.

The car did not die and I was able to make it to the mechanics to get a new battery

I bought the GB70 2000amp about 3 weeks ago 'just in case' i needed to jump a larger vehicle, where I knew the less powerful one could jump my car no problem.

I was in the market for a portable car jump

Manual recommended it could take up to that time for a jump (have jumped this car within seconds with normal cables and my Rav4- 4 cylinder.)Easy to say it couldn't do the job.

It wouldn't jump the car as recommended in the owner’s manual (under the hood) or the alternative (jumping the 12V battery located in the trunk

At first i had difficulty starting my dead car

I used it together to help some strangers jump their car and the guy asked which model I had and where I could buy it

Bought the thousand amp version thinking it would offer more than enough power to jump my compact car

I was holding off on getting a battery knowing I could use the NOCO to jump start my car if it died.

Have attempted to use this twice on dead car batteries without success

I wanted to love this jump starter and was excited to try it on my dead car

my car has died and I've had to ask my neighbor for a boost

I bought this in case I got back to a trailhead from a long trek in the wilderness to find dead car battery.

Very powerful and reliable for every type of situation, even if your alternator fails this can power your car until you can park it in a safe spot.

It's tiny, cheaper than the Duralast, and my car is DEAD

Purchased one of these for my wife's emergency car kit

Our car has died once during this time

I travel for work often, and always come home to a dead car battery

There are many uses, besides jump starting a dead car battery (which I did in 3 minutes)

Inside the package is the NOCO boost plus jump starter as well as a few excessories, the cable clamps (which are fairly short ~6 inch cable length), micro-usb cable, car to usb charger, and a bag for the NOCO boost (not large enough to put the cable clamps in with it).The NOCO was extremely easy to use

but I used the same charger then to charge by other 3 dead cars & it worked on aLL of them!

Doesn’t start a fully dead car like advertised but still does a good job

Like advertised, it will start up a battery of a dead car in no time

I used this to jumpstart my car 4 times and still works great

Especially working at a dealership I find lots of dead cars on the lot.

Couple days ago my car stopped working due to the battery, I had the jump starter in my car at the time and it worked and it was still fully charged, the next day my car died again and when I tried to use the jump starter again it wasn't even turning on I had to recharge it fully which took about 3 hours and the same thing happened again the next day

For me I had already unlocked the car manually, but it's not guaranteed that the door would operate as you connect the battery

But more importantly, I'm not going to get caught again with a weak or dead car battery, because I'm going to carry this with me inside my computer bag to whatever vehicle I'm using, rental or otherwise

This makes charging/jump starting a dead car battery so much easier and faster, not to mention there not being a need to wait for another vehicle

portable car jumpers are a tool I would recommend to ANY driver all day long, this one's small footprint only makes it that much more convenient

UltraSafe Portable Lithium Car Battery Jump Starter comes with a car charger, a charging cable, and the 12 volt leads for connecting to the car.

Won't charge a battery on a dead car

My car wouldn’t start I panicked then With minimal amazon searching I ordered this, got it the next day watched a YouTube video just to make sure I wouldn’t electrocute myself and it actually worked within five min of it charging fully my car was running

Highly recommend for an unpredictable car.....like mine.

would click off a few seconds after just a couple seconds of slow c ranking

USB C is much faster, if this model is available with a USB C charging port I would like a replacement...

I had to use override mode (note it's not super dangerous as they scare in their videos :) ), and voila,

It worked as it should.

I bought this mostly for peace of mind, however, I've used it nearly a dozen times for both of our cars as well as neighbors cars as well as for my phone when the battery was almost dead

It lasted longer (for me) than the one-year warranty it came with, yes, but there is no reason lithium batteries of the type used in this device should fail as quickly as they did.

Haven't done a jump start yet but will update when I do, as well as when I see how often I need to recharge just from sitting.

so we needed a way to jump the car from our garage as well as on trips

Getting the car fixed this weekend, but in the meantime my wife has already mastered the NOCO as

Pulled out this booster and it started right up just as fast as with the vehicles own battery

We have charged at home in a wall receptacle as well as in the lighter socket of the car and both gave equal charges.

OUT MY JNC660, PLUGGED IT IN AND STARTED IMMEDIATELY.Maybe thing thing works as it should on smaller engines, but I would not trust it on larger

It's already saved me once as well as having saved several other folks