NOCO Genius Boost GB40 Real World Test and Review 

Bought and used a gb40 3 times when my battery was dying years ago, kept in the trunk, checked after a year or so and topped it off, back in the trunk for a year, used it last week to jump my car on the side of the interstate. Worth every cent. 3.5L v6 in my case.

I just bought mine this morning. It did really help with my car to start. Lifesaver. 👍

I tried jumpstarting my new car dead battery with jumping cables and with a jump starter I bought at walmart, but nothing worked. I called AAA and the guy came up with a NOCO booster and in 30 seconds the car was running. Now I have a G70 and just love it.

I have been using these for a few years now when I go to auto auction and even use it to start vehicles with no battery in it. This little bad boy has never let me down

I've had the GB70 for a while now and I love it. It starts my 5.3 V8 several times on a charge and its a newer engine so it still has decent compression. The built in circuit protection is also cool and really dummy proofs it (won't let you attach it backwards and fry your computers). I got tired of dealing with long jumper wires and a second vehicle. The light on it is also super handy and quite bright. I've used it when camping (3 nights, for a majority of the night) and still had battery to spare. Definitely worth the money!

This is perfect!! Definitely gonna buy it! Thank you

Great video man! My favorite part was at the end " I like you here, with me" literally laughed out loud! and because of that I'll buy my GB40 through your link. Keep up the great videos!

Just got 1 today…after my battery wouldn’t start and had to pay $75CAD just to boost from roadside assistance! Happy to see good review!😊

THANK YOU! I just bought this and will try !

Great video, so great I went out and bought one! Thanks again for the awesome and very detailed review!

My work had one ready when needed and I've used it several times for customers and myself once. Never failed me.

Thanks for the vid, im going to get 1 for my boat. At first i was unsure which 1 but now i know which to get.

A great and informative video on how to use your GB40.

What a great review. Thank you very much!

Thanks for the honest review with real proof. I will buy this!

My Fiat Coupe sits in the garage most of the winter and sits dormant for weeks, connect this bad boy and she’s fires straight up, great device

i have mine for 3 years and i have powered with no issues as all anything up to my tundra v8, definitely a game changer

Great review and looks like it is a good product! 👍 Thank you for advise, going to buy one today! 🙏 🇨🇦

These little battery packs can be a life saver!

Very informative, practical, helpful video. Thank you!

Just jumped mine! Thank you. Going to drive her around and give her some warmth.

Once you have one of these, you won't need jumping cables anymore. I have GB70. Used it many times. One of those times my alternator died on the way to drop off kid to school. LIkely it wasn't far away from home. I connected it to battery and closed the hood and drove like that to my driveway from kid's school. It was powerful enough to run a car with failed alternator. It wasn't far but still. Maybe more than a mile or 2. Other time I used it on friends Toyota 4runner SUV and he was so impressed with it that he actually ordered one. Other use that I had for it was to connect portable car tire inflator to fill up a tire without using car's battery or 12V port. Really great device. I have it for 3 years and still going strong.

Just received mine as of 24 July 23 this morning around 11:00. I had to use the override but it got my 2003 Honda Pilot started. Best $100.00 I ever spent. It is mistake proof. Glad I did my research on this!

Just bought one of these. Nice to see it in action!!

Thanks, Matt. I hadn't used mine yet and forgot that the cables came in their own storage bag. I panicked until you pointed that out, then I knew where to find them. :)

I’ve jumped 4 sedans with this and 1 SUV last year. It’s a work of wonder. And I’ve recently jumped my friends Sedan. I’ve owned this for a good 2 years and still work great!

NOCO GB40 is a great product. I’ve used mine 4 times over three years it worked flawlessly. The instructions are brief and the GB 40 is easy to use. BTW the GB 40 is rated for up to a 6 liter gas or 3 liter diesel engine’s. Worth noting if the battery is toast meaning it’s unable to be charged this jumper might not get you going. This is detailed in the instructions.

I picked up the Noco GB70 when it was on sale. Agree with everything you said here.

I have two of these since 2018. Every few months I have topped them off. Recently I acquired capacity test equipment, which drains the unit until the USB output falls below 4V and reports the mA*h consumed. After a top-off, one of them provided 3030 and the other only 2431. After charging them both back up, the capacity increased to 3532 and 3492 on the second test. So in the future I will do a full discharge and recharge once a year before winter, instead of a frequent top off. Evidently the top off causes the three cells in the battery pack to become unbalanced. The full cycle seems to make sure all three cells are at their best. For those of you who want to do this too, keep in mind the NOCO can also be used as a power bank to recharge your phone or other devices.

Hell yeah its worth it. Its saved my tail many times. I've used it to help others as well.

Bought just before my 3-day trip because my battery went dead a couple weeks prior. Came back from the trip and found my battery dead again. Hooked it up and started the car successfully. I was so happy.

Used it for the first time ever today on a stone dead Defender. Started on the first try. Great product!

I can confirm that the NOCO gb40 jump started my 2015 Ford Taurus SHO with no problem.

Great informative video. Having some major issues with my 2019 Honda Civic Sport. Had to have the car towed to the dealership 3 times. Initially while getting on to the freeway, the car totally died. Had to have it towed to the dealership. they were great and said I needed a new battery. The next 2 times, the car would turn over but not start. Again had to be towed. Every test that the dealer could perform was done. They can't find the problem. The dealership even contacted American Honda but no solution can be found. I'm now on my third battery and have had the car 4 years. The tow truck driver jump starts the car and it runs like it should. This is why i purchased the Noco GB 40. It won't solve the problem but hopefully it can start the car and I won't have to wait for AAA. All of these issues have happened during weather that was in the 90s-100s. The car has never overheated and fortunately there has been no out of pocket expense. Thanks and have a great day!

short and sweet ! thanks.

4:12 if you guys want to get past listening to him talk and basically say the same thing over and over again

Glad it worked for you. I've had one of these for a couple of years, and its never managed to start anything. Even vehicles with batteries far less dead than the one in your video. It has some utility as a phone/laptop charger, but as a jump starter, its worthless.

Nice review. I just picked up a GB40. I bought a cheaper one a couple years ago for my snowmobile as a back up. I wanted another as a back up for my 2 vehicles and this came highly recommended.

bought one just recently, so very pleased I did

Jump starters are like having a life saver especially in the winter. After having a different brand for 9 years, I just bought a NOCO. The temperature has been in the single digits (that's in Fahrenheit for all the intentional peeps reading this 😌) so I'm actually looking forward to my car not not starting just so I can use it 😂 I had a less powerful jump starter that I used dozens of times over a span of 9 years and it was a 750amp jump starter. The NOCO jump starter I just bought is 1000 amps so it gives me peace of mind knowing it has more power than my previous jump starter. These are well worth the price as they give you peace of mind, especially if you want to make sure your family members won't be stranded if the battery dies especially when it reaches the single digits temperatures in the winter.

I know this video is older but great video never used their power packs before but we have used regular battery chargers at the lake for boats.

Just went outside to head to an appointment and my 2018 Mazda wouldn’t start, just blurbled a half start and lights flickered. Threw my ancient harbor freight charger on it for now but just ordered the Noco GBX45 Boost as I never want to be in this position again. Note to all, use the battery pack! Charge / discharge cycles are important to the health of units like this. At minimum bring it inside and top it off every 6 months, but really use it up once or twice a week to charge all your devices! It can double the service life, per Noco themselves

Thanks for the video, very well explained,

got one, works great

Thank you for this video!! God bless!!

Thank you great video

Your most energizing video yet 🤣Keep it up my man.

You mention that the battery may be too dead to jump @3:40. The GB40 has an override button with the red exclamation symbol on it. You hold this override button for a few seconds and then the chaser power level lights will come on. This should only be used if the battery is completely dead and is not recognized by the GB40. Using this override setting disables the safety features of the unit but does NOT increase the cranking power as some people think.

Well done!

Bought one a couple days ago didn't open cause I was going to send it back. Well left the lights on last night and this morning the battery was dead. I open the charger box and out of the box started my car. Every husband should have this in your wife's car. Love it

Aww wish I got it thru here. Just bought it after my taxi guy jumped me. Last time I took batt out and charged it inside but it was so heavy. Paid him 25 thought he was going to do cables but he used this and sold me on the spot. For women and for men actually we all need one. Buying one for my fam next

Great video thank you

just ordered one as my battery is flat looking forward to to getting the battery working looks a lot better than jump leads as i use to carry.

Looking into one of these. I have AAA but let's face it by the time they get there, I could already be on the road with this thing.

Mine should arrive today. I’m going to put it to the test. Thanks for the the review. I have a noco genius trickle charger and it’s also great

Thanks for the video, bro! How long did you charge it for?

Ive had mine for a year now. Still fully charged off full charge. 👍 So far so good

Just bought this. Liked and subscribed! God bless ☺️🙌🏼✝️

great video thanks

I used a GB40 at my job yesterday to jump off two completely dead V6 sedans. They were so dead that I had to press the boost button (override button) for both vehicles. (Which means the car battery was below 2 amps). It started both cars and I noticed the remaining power level in the GB40 was only decreased by 1 bar.

Just got one thanks

Thanks for the video

I have a different brand but same concept and it has saved me a few times.

Great demonstration. I just got one for my 52nd birthday. Wasn't sure about it starting a vehicle since the packaging read like it only charges cell phones, tablets, laptops, etc when you clip it to a car battery. It think I misread it. Looks like I'll keep it thanks to you

Just ordered one

Let me know what you think!

Great video.. Thanks 👍

Just a word of caution. If the jump pack might be left in a hot car think about buying a LiPo safe sack. Should the battery catch fire from over heating the fire will be contained in the bag.

Amazing video man!!, since I’m going to start driving soon, I’m starting to search these little things for my future Jeep YJ. Thanks for the video!!👍👍

Thanks SMG

I used a GB40 to start 2.4L Camry with weak (not dead) battery. Worked just fine I keep it in my car for future use. Seems to hold charge a long time in glove box

Any battery pack that's reliable is worth the amount you pay 10 times over. Saved so many cars with mine

Currently charging mine. I haven’t used it in a little more than a year and have had it for 2 years. Works great as long as it charged. It’s 25 degrees out where I live and I came out to a dead/struggling battery. Unfortunately there wasn’t enough juice to get it started so my roommate had to jump me but for the 4 times I’ve ever used it, it’s been awesome.

You can also use these to start lawn mowers/tractors, snow blowers etc with electric start too.

great gadget! it works flawless;y

I bought one because that's what roadside service used to jump my car. I've only needed it once and it eazy-peezy to use

I'm sold

great video i did like it

Can this charge a 12v battery? Not just jump it? Like if i just plug it in to my 12V marine battery will it charge it? Without being plugged into a outlet?

My girlfriend gave me one for Xmas. And wouldn't you know it my battery died just 3 months later in a public garage at night. The worst place I'd want to be. I pulled this out of the trunk and after watching a tutorial on RU-vid I tried it and it worked. I was so happy, this thing saved my life.

I keep leaving my dashcam on which drains the battery when I have locked the car and this will be the perfect solution. I have already bought this so I cannot click your link but I appreciate your video thanks

Just a question, when the car starts up after the jump, do you take out the NOCO when the car is running or turn off car then take out NOCO?

If ever maybe you could try using or testing it somewhere very cold and on a bigger engine..

Good vid on thst bought one to day if the battery is toast there a red buttton u can hold to get more power if u press the red button on the lower right it make the green button falsh so u can start the car with no battery Thanks

This might be a dumb question, but when you have the NOCO fully charged does it matter where you store it? Would it be fine to keep in my car during winter (below freezing) or during summer (up to 100° F)

so what is the difference between all the models? is it pretty much that they just hold different amounts of " jumps"?

What do I do if I have to use the manual override, then turn it off and back on without the manual override, it starts detecting the battery but would not crank the engine? The clmps connected securely. The car was sitting on th elot for close to two weeks. A 2 year old Bosch battery made in Germany.

Does the black or negative cable has to go on the negative part of the batter because I watched some other videos and they put it on the metal part of the car.

How do you charge the noco ? Is it usb in how to charge ? Or usb out ? I know I feel stupid asking but mine might not be charging.

Even my GB20 has no problem starting an GM 3.4L 6 cyl.

The great thing about Noco is, because it's an American company, they are designed to start ridiculous capacity engines. That's great for us in Europe because we can just buy the cheapest version and it'll easily start 99.9% of all the vehicles over here.

I bought mine what the difference between a gb40 and gb40 boost plus ?

Just had a 1 year old GB40, never used before, that I've kept topped at 100%, fail to start a 6cyl truck battery - would just click. After attaching the 40 the lights would chase so it looked to be connected properly. Had to jump off of another car. Disappointed. Defective? Can you trust these?

Are you supposed to press the "!" before jumping?

car has been sitting for months in storage, car is completely dead. Do you recommend the GB40? Noco has so many other products and i don’t wanna over pay for some features when i just want to jump start the car and charge it.

This is a well made product. And guess what happens when you make a well made product? People give you good reviews and a lot of people buy your stuff

Anyone that owns a boat should have one of these. I’ve been stranded in the middle of a lake in the middle of the night before. A noco would have been REALLY nice to have.

Once the car starts do you need to wait a while for the battery to charge or can you drive off straightaway?

Borrowed from my father in law for my 81 f150 with the 302 worked fine at first has been sitting for about a month since gas prices are so high right now after about four times it died so unsure at the moment

Thanks for the video. After watching it, I bought one at Canadian Tire, Noco should pay you a commission. :)