Noco Boost Plus GB40 Lithium Jump Starter | Can I Fix It?

[@andyleatherbarrow7322]

I couldn't take my eyes off the thick black and red cables floating perilously close to each other. You're a braver man than I........

[@vadimbellous8313]

Those wires flapping in the breeze carry no risk of shorting out. You see, the relay (black box) next to the row of MOSFETs is breaking the connection for the positive lead. For those wires to go live, that relay must be engaged. That why when you have the clamps on your car battery nothing will happen until you press that button giving the booster the OK to switch on that relay. He should have explained it, though. I'm sure you were not the only one wondering why no fireworks.

[@BuyitFixit]

It was fine, they were isolated via the relay and only get powered if the relay gets energised.

[@TylerDurden-pk5km]

@@BuyitFixit Were both ground and plus isolated/switched?

[@BuyitFixit]

Yes, the positive wire went through the relay and the negative seemed to go through a bank of mosfets, although they could have been diodes for reverse polarity protection (I didn't investigate that part too much).

[@mxslick50]

​@@TylerDurden-pk5km Doesn't matter, BOTH poles must have a complete circuit for any current to flow.

[@barrymurray8264]

This Barry from Middletown Delaware USA. I’m a 70 yr old stroke victim, my friend, you are without a wizard ! ! Since my stroke I can’t read. But to watch and see and hear , videos have made me a happy boy. I Thank You . Best wishes.

[@BuyitFixit]

Thanks Barry 👍

[@kevatnorthfield]

Oh look a big Clive tribute act. 😂

[@Hooch737]

@@BuyitFixit different but same. Listening made me feel like I got my balls back. Ty

[@SlartiMarvinbartfast]

Excellent repair - I admire your skills, fault-finding, patience and tenacity. Also your ability to find some great Ebay 'spares or repairs' bargains. You deserve a lot more subscribers.

[@BuyitFixit]

Thanks so much 😊👍

[@mazafreno]

Yes completely agree... unbelievable!!!!!! For me one of the best and interesting channel on youtube!

[@BuyitFixit]

@@mazafreno Thanks 😊👍

[@wb1340]

1000amps, sure, no problem :) I love watching things being repaired instead of being thrown into a landfill. I'm old school when it comes to soldering so watching components being desoldered and soldered using hot air kinda' blows my mind.

[@BuyitFixit]

Thanks 👍yes most stuff is now surface mount. I used to think it was more difficult that it is. If you have the right equipment and a bit practice it does get easier 🙂

[@humairajamal85]

Like when watching a movie where the protagonist faces challenges the audience feel it - i felt the successful repair was done myself with all the headscratches and frustrations in between! Thanks for that

[@BuyitFixit]

Thanks 👍Glad you enjoyed it 🙂

[@rajarahman9823]

Your dedication to fault finding is on another level. You couldn’t give up. You never felt defeated. By shear determination, you got it. Plug it in to see if it works and does the job. You succeeded. I was gonna buy the same model for my son at Halfords. As for NOCO, if a NOCO rep is watching this video, you could have a bucket load of returns, just because the internals are just not up to the job. A normal person, just ain’t gonna do what you did. Customers will buy, find it’s not doin it’s job, return it shop. What a DISASTER for NOCO This video is excellent. Keep up the good work. MEND IT MARK was probably watching this video and sayin, check this first then check that out next.

[@BuyitFixit]

Thanks 👍I've done a lot better work than this one, the JVC hifi I repaired took me a bit of time, but I got that one in the end. I've fixed tons of stuff from medical ultrasound scanners, RGB lasers, Solar Inverters, to name a few 🙂👍

[@robertbackhaus8911]

This sort of thing just happens, and isn't a quality problem. A chip that is faulty, installed in a product, does its job well enough to pass QC testing, then fails in the field. A manufacturer can't avoid this - what matters is their return policies. We don't know anything about this pack, but it is likely that this is a returned device. Maybe returned to Amazon, who sold it in one of their returns pallets.

[@adrianstephens56]

I love it when you go from soldering surface-mount components that need a microscope to see to "and let's start a tractor".

[@BuyitFixit]

😂😂😂Or fixing a solar inverter, and then having to reverse engineer their software..

[@rigmaster1]

Very satisfying to be able to fix something that someone has discarded. Nice job!

[@BuyitFixit]

Thank you 🙂👍

[@MXP90DL]

Brilliant repair from start to finish. Thanks to you I now understand much better what's going on inside my NOCO and so happy that mine worked right out of the box. Your a good man

[@BuyitFixit]

Thanks and thank you for your kind comments 👍

[@llamudos9809]

Just a tip when you are doing something as fiddly as that i recommend putting tape on the negative soldered end just to make sure you do not short. Easy done.

[@BuyitFixit]

Thanks 👍

[@roycehartman325]

I've had my Nocona gb40 for approximately 10 years, its been used a bunch for jump-starts as well as charging other items and it is still going strong! When it dies, I'll definitely buy another Noco branded jump pack!

[@BuyitFixit]

Thanks for sharing 👍

[@wisher21uk]

Mick I don’t know how I missed this one, strange but anyway fantastic repair, goes to show how easy things fail for our benefit lol Thanks for sharing 😊

[@BuyitFixit]

Thanks 👍

[@richardchandler9734]

You have a particular set of skills. I admire your persistentcy ,patience, your mind follows circuitry in an excellent way ......thank you for the superb video and following along was a blast the tractor lives

[@BuyitFixit]

Thank you very much Richard 👍

[@commander_lard]

great video - and a good reminder for me to go and charge mine up to prevent the batteries swelling!

[@BuyitFixit]

Thanks 👍Hopefully you remembered to charge it 🙂

[@joatmaster0]

Awesome troubleshooting skills! I must say that a true killer would have asked about the little red button!!! A little Fifth element reference there btw. FYI all you have to do is connect the jump starter, turn it on and not use the little red button unless you are sure you have the battery connected properly. The red button bypasses the built in protections such as reverse polarity protection and delivers full amps to what you are connected to!!!

[@BuyitFixit]

Thanks👍 yes a couple of people mentioned about the button. Guess I should have read the instructions 😂😂

[@bigjim485]

Greetings from Greece. All I can say is that you are an artist !!! Loved watching the entire video !!!

[@BuyitFixit]

Thank you so much!

[@KJ6EAD]

You can save a lot of time and frustration when trying to locate a mechanically flaky joint by using a small insulated probe instead of your finger. This allows you to apply pressure to a very small area. It's amazing how many faults can be found with a good visual inspection and poking with a stick. 😉

[@BuyitFixit]

Thanks for the tip 👍

[@sixtyfiveford]

Nice repair. The biggest drawback to these lipo jump starters is the lipo batteries themselves. They seemed only last around a year if kept fully charged. Lipos ideally will store many many times longer at 3.8 to 3.85 volts per cell. This isn't an issue on the 4 cell starter packs that are mainstream now as you can deliver around 15.2 to 15.4 volts at this storage voltage. The 3 cell packs like you fixed here aren't strong enough to jump start when kept at that 11.4-5 voltage.

[@BuyitFixit]

Thanks 👍and interesting to know about the 4 cell packs. This is the first one I've worked on.

[@wingracer1614]

They also don't like freezing temps or really high temps so don't keep in the car. Except that's what most people would want it for.

[@BuyitFixit]

Good idea. I've got a battery bank for my solar and I know that they don't like temps of zero or less.

[@thesushifiend]

I don't know. I've had the larger "1500A" GB55 model for 3-4 years now. I keep it fully charged and it's saved my arse several times now. I've even saved a stranger once and taken it to the USA to start my aunt's car which had been sitting for a year and a half so I could drive it when I visited her. I have several older cars and if I could, I'd have one for each car! The only thing I don't like about it are those stupid buttons on the top. If it gets pressed accidentally, I worry it'll turn on and drain itself so that it's no good when I need it in an emergency. So I still carry jump leads with me at all times.

[@biglew1161]

I've had my GB70 2000A about 5 years now always kept in truck even in winter, I haven't had to use it on my current vehicle 2014 f150 that I've had 2 years now. but I have used it around the farm even on tractors. I charge it around every 5 or so jump starts.

[@MultiReadify]

I really admire your patience... these types of repairs get under my skin a little bit when they keep fighting me. I need to try and be more like you when it comes to keeping my cool. Great video and nicely done!

[@BuyitFixit]

Thanks 👍Sometimes I find it's better to put something away for a few days, look at something else and then come back to it if it's being really stubborn. It seems to work for me anyway.

[@MikeyMack303]

@@BuyitFixit I agree 100%! Thank you for sharing the video!

[@StreetChally73]

@@BuyitFixitThe same thing applies to working on your project vehicle. 👍 Nice work repairing this booster rather than adding more plastic to some landfill that’s already full of other manufacturer-deemed ‘non-repairable’ items. It’s kinda sad how the world seemed to become a throwaway society, rather than building things that can be more easily rebuilt/reconditioned by the consumer…Remember when cell phones actually had battery covers? 😕

[@bills6946]

Well, Mick, that one slapped you around a little, but you came back fighting and won the fight. I thought a cold solder joint was the villain. Well done.

[@BuyitFixit]

Yes 😂😂😂got there eventually 👍

[@Tink-GB]

What a pro... Scarey repair...perfect for Halloween ...but an excellent result... I certainly won't be trying that repair at home..!

[@BuyitFixit]

Ha, I wouldn't say pro, more of tinkerer 😂😂😂

[@charlesmott8863]

Flipping good deduction of the circuitry and fault finding skills, subscribed!

[@BuyitFixit]

Thanks Charles 👍hopefully you'll like some of my other videos 🙂

[@MarcStift]

I really enjoy watching you repair faulty items. I really admire the knowledge and skills you have fixing faulty items and i am gratefull that you are sharing that with us. I thoroughly enjoyed this repair and i'll be looking forward to the next one.

[@BuyitFixit]

Thanks Marc, much appreciated 👍

[@jlucasound]

Great Repair!! Nice Tractor!! 😃🔋🔋🔋👍🚜👀👂👏

[@BuyitFixit]

Thanks 👍

[@markosluga5797]

By the way, it detects automatically when to go into boost mode - pressing the boost button pits in to manual mode and energizes the 12V output. If you have a flat battery you can just connect the battery and have it detect the connection (same would apply when you connected it to the starter).

[@BuyitFixit]

Thanks 👍yes a couple of other people mentioned the same. I didn't read the manual 😂

[@skysurferuk]

23:00 Been waiting for those contacts to touch each other... 🤣 A nice repair. Re-celling is always a pain. 👍

[@BuyitFixit]

Thanks 👍Yes, I was hoping the cells were ok when I bought it and it had some other problem, which it turned out it also had 😂 The black and red wires are isolated from the pack by the black relay on the board, so they only have power when the main board activates the relay😉

[@XantheFIN]

Nervously looking how you kept almost touching the batteries with all kind of cables and other stuff while rotating old cell back.

[@BuyitFixit]

Makes it more interesting 😂😂👍

[@LilasTools]

Gteat repair! I have a GB70 and has served me well for many years, it if ever has a issue i have your excellent video to help! 👍👍

[@BuyitFixit]

Thank you 👍

[@ralphj4012]

Very well done. The right pad of C12 (36:48) and the left pad of C6 both looked poor, but maybe an illusion. 1000A for 2.5ms, easily enough to jump start a six-year-old's Mercedes GLC 635 AMG. Good to see that China Airways is complying with dangerous goods regulations.

[@BuyitFixit]

Thanks Ralph, yes sometimes the light on the microscope shows things up which look fine at other angles. Yes China Airways.. 😂😂😂😂👍

[@awesomed007]

A Lie ...... express ....... they are transparent in their name .... lol

[@jayfowler4747]

Nice fix , tip for connectors measure the voltage on the pcb to see if the conection is any good, it removes the doubt.....

[@BuyitFixit]

Thanks, yes good idea. They looked very discoloured and overheated so I thought it would be best to replace them anyway.

[@TheLawnmowerLady]

Your tenacity to get this fixed is admirable. I prolly would have given up long before even finding the faulty areas of the PCB. Well done! I have this exact same boost pack, and have had no problems with it. I know where to look if I have problems in the future. Do you suspect that original nick where the positive lead was pinched could have had anything to do with the failure? Cheers!

[@BuyitFixit]

Thanks👍I think the pinched lead was just incidental and nothing to do with the failure.

[@christopherleubner6633]

Otay plumbers tinning flux plus a little bit of light sanding makes the solder stick almost instantly to the battery tabs. The tabs are optimuzed for spot welding rather than soldering so a more agressive flux is needed. ❤

[@BuyitFixit]

Thanks for that 👍🙂

[@annaplojharova1400]

The "C rating" is just the current the cells gave to handle for a long term (all capacity at once) discharge. It comes from the internal resistance and the ability to dissipate heat. For shorter bursts you may go higher with the current, you just have to monitor the temperature and you get limited time. It is all just about the power dissipation, heat generation and the ability to handle the heat, both by thermal capacity, as well as the external cooling. The "1000A" rating is just the current it is able to electrically deliver, aka the internal resistance. Normally for starting you need the peak current only to get the starter moving, so for about 50ms or so, so short enough to allow the cells to handle it. Then to crank the engine fast enough to start it, you need the ability to maintain voltage (minimum in the 7V ballpark), but the current uses to drop to the 200A ballpark, low enough to cover the 10..15 seconds cranking.

[@BuyitFixit]

Thanks for that. I'm no expert on cells so good to know 👍

[@599miata]

Great repair video. Your perseverance is a-ok mate.👍👍👍👍

[@BuyitFixit]

Thanks 👍

[@tomharris1457]

A man of patience, who also seems to run a farm in spare time!

[@BuyitFixit]

Yes, something like that 😂😂😂👍

[@Theilencer]

The positioning of the scissors and the other tool (i don't know the english name for) at 18:00 got me holding my breath for almost a minute! Damn! Nice repair but keep it safer next time.

[@BuyitFixit]

👍Thanks. The angle you see is a lot different from my view.

[@TylerDurden-pk5km]

I have to admit - that was slightly anxiety inducing seeing the working practices on lithium cells that can output multiple hundred amps ... I would have used a lot more caption tape for sure. :) Very nice fix though.

[@BuyitFixit]

Thanks 👍Sorry for any anxiety caused 🙂

[@awesomed007]

mobile phones and laptops have these too ... achtung!!!! its 15c rating, only 100 amp combined ... dont freak out

[@TylerDurden-pk5km]

@@awesomed007 The laptop and phone ones are can deliver much less current and are protected by a BMS - these are not. If you short them, you get short circuit currents of 200-400A (more with bigger starter packs).

[@awesomed007]

@@TylerDurden-pk5km I have recycled 10000 lithium cells. Not as powerful as these.Few times I shorted 1.2kw packs, they deliver maybe few hundred amps, nickel got red hot and arced a centremetre off ending the short. A car battery can give 1000amp if you short it. What we should fear is if a lithium catches fire internally. Even a mobile phone battery is as dangerous as the lithium combusts same irrespective of what type of pack. Now regards this battery booster batteries. I think they are 15C rated... A give away is the noco 15X label. So 15x 2.2 amp is 33 amp output but yes, in a short, some batteries will give more but to my mind, your fear and anxiety is too much. Don't believe that these are 600 amp batteries that are required to start your car, they are not. They merely supply current to mosfets on the board that up the amps to anything between 200-1000amp depending on manufacturer honesty. Beware of lithium for fires, even a small low c rating is dangerous as any. Hope this helps you reduce anxiety. Goodluck.

[@TylerDurden-pk5km]

@@awesomed007 I cant vouch for these specific ones, but test of these starters by others show Amps in the range of 200-800A (depending on model). Usually they are NOT protected by mosfets, they have reverse protection diodes and usually a relay and apart from that - directly connected to the lithium cells. Mobile phone batteries have a protection board within the batterie assembly, so as long as one is not opening the assembly and shorting the tabs of the batterie pouch directly - it should no be possible to cause runaway. You can look for example at the channel of "project farm" to see tests of these that include measurement of output amps.

[@LinusJohansson-yu7cy]

Nice fix! 👍 It was probably faulty from the beginning, but owner perhaps never tried charging it until it went flat. After that the cells were slowly drained by the electronics from just sitting and eventually got ruined. A shame it wasn't sold earlier so the cells would have been savable. For a budget-jumpstart any high C rated 3S-4S RC battery will work just fine, and they have no electronics to cause vampire drain either.

[@BuyitFixit]

Thanks 👍 and also thanks for the info 🙂👍

[@JAYG6390]

Was happy to see it was only half way through the video when you were putting the battery back in.. knew there'd be something more interesting to this one. I wonder what the actual boost amount is on one of these. I thought Noco were a reputable brand but appears not

[@BuyitFixit]

Thanks. It was a fairly long video but I felt if anyone has a similar unit and wanted to rebuild their pack they now know how to. I had to cut loads from the video too. The "first cut" was and hour and a half which was far too long...

[@JAYG6390]

@@BuyitFixithaha I'm sure many of us would have watched it still 😁

[@Theoppositeofchaos]

Knowledgeable guy two thumbs up

[@BuyitFixit]

Thanks 👍👍🙂

[@OKuusava]

Glad there was no voltage, as you did not care at all to keep the black and red big wires separated ;-D

[@BuyitFixit]

It's not a problem, they are isolated until the relay kicks in 🙂👍

[@lmwlmw4468]

.....and we have lift off.....Great work..!!!

[@BuyitFixit]

Thanks 👍

[@ianhuxstep211]

Great informative video as usual. You are certainly a braver man than me. I use these type of Lipo batteries on my radio control aircraft and I've seen so many catch fire due to damage, or people attempting repairs to them. I personally would not have attempted this, personally if I were to do this I would have used a spot welder for battery terminals rather than solder, charged and balanced the battery using my Lipo charger.

[@BuyitFixit]

I recently bought a little spot welder, there's not a lot in it apart from a similar pouch cell and a bank of mosfets. I think soldering was probably ok as I was conscious of the pack temperature and the packs barely took any heat, and the originals were also soldered. Thanks for the advice, appreciate you taking the time to comment 👍

[@AmigaWolf]

@@BuyitFixit It's totally normal to solder does Lipo batteries cells, they are not 185650 cells, does you normally spot weld, but i also have soldered them (18650) to get a 24v battery pack, and also went great.

[@BuyitFixit]

I too have soldered 18650 although it's not best practice to do so. I recently ordered a small spot welder, which is nothing more than one of those pouch cells and an array of mosfets.

[@awesomed007]

there aint nothing wrong with solder, heavy guage should be used to handle high currents ... further to balance them prior to soldering, just connect them in parallel, they will equalise

[@carzyjim]

Great video. I have a jump starter that is losing charge. It drops about 15% over a few days. I suspect the battery must be buggered as it is almost 4 years old and on,y used a few times, and I have always tried to charge it every month or two.

[@BuyitFixit]

Thanks, if it's the same model as this one it seems they have no cell balancing, only cell monitoring. So what happens is that if one cell doesn't get fully charged, and the effect seems to get worse over time. The device stops charging when any cell gets to 4.2V, and one of the other cells may only be at 3V, which causes problems like what you have.

[@carzyjim]

@BuyitFixit mine is a different model, but probably the same problem

[@johnnodge4327]

I've got the same unit. It's not 1000 Amps, dispite its claims. It starts small petrol engines without any issues, but it won't turn over the 2.2L diesel in my Land Rover. Nice to see what's inside though.

[@BuyitFixit]

Nice. Yes I don't believe 1000 amps either, although I would have thought it would have done a Land Rover though? It did the tractor which is a 4L. It's the only thing I've tested it on so I guess time will tell.

[@johnnodge4327]

​@@BuyitFixit Mine has now stopped outputting any real current, as it won't turn over a 999cc 3 cylinder Toyota Aygo. I guess I'll be dropping £36 on a set of new batteries. At least I've your helpful video to help me carry out the repair.

[@BuyitFixit]

@johnnodge4327 After making the video I also tried it on my wifes discovery 4 after the battery went flat. It wouldn't start that either (perhaps the battery was too flat) I think they are just a glorified power bank.

[@chauffeurmarco]

bought that one, the GB40 in 15 and still works fine after all these years.

[@BuyitFixit]

Nice 👍

[@MD-gc4xq]

Once again I watched the whole video, didn’t understand a word you were talking about but just addictive for some reason, nice one, enjoyed it 👍

[@BuyitFixit]

Thanks👍Sorry about that, perhaps subtitles may help?

[@MD-gc4xq]

@@BuyitFixit no what I meant was I know nothing about electronics but still found it fascinating

[@BuyitFixit]

@MD-gc4xq Oh right 😂😂😂😂😂👍

[@jonathanpalmer155]

@@BuyitFixit The North-East accent is never a problem.

[@cengiz6170]

​@@BuyitFixit Merhaba altyazı Türkçe dil desteği yok. Lütfen lütfen Türkçe dil desteği olsun. Sizi hayranlıkla izliyorum. İşlerinizde başarılar dilerim. .................. @BuyitFixit Hello, there is no Turkish language support for subtitles. Please, please have Turkish language support. I watch you with admiration. I wish you success in your business.

[@Popeyes66]

A great item to have working up in the North-East at winter time. From a guy in the less frozen South-East. According to KZbin's Weather Guru Ryan Hall . . .you may be digging that tractor out this winter . Great fix 👍

[@BuyitFixit]

Thanks, I've used the tractor in past winters to dig our driveway out 😂😂😂😂👍

[@Dime_Bar]

Nice work. I've got the same jump starter so hopefully mine won't do the same but if it does i might be albe to fix it.

[@BuyitFixit]

Yes, that's the idea and why I left a fair bit of the battery re-build in the video. I guess in the future there will be a lot of people with a similar situation once the cells start failing.

[@cengiz6170]

3 yıl gibi bir sürede piller kapasitesinin özelliğini kaybedecek yeni bataryaların değiştirmesi kaçınılmaz olacak. Maalesef Noco servisi batarya değişimi yapmıyor yeni ürün satmaya çalışıyor. ...... In a period of 3 years, batteries will lose their capacity and it will be inevitable to replace them with new batteries. Unfortunately, Noco service does not replace the battery and is trying to sell new products.

[@WatchDutchMD]

Nice video 😍

[@BuyitFixit]

Thanks 🙂👍

[@markpirateuk]

I have one of the larger Noco's, very interesting to see the guts, I admire your fault finding skills, great fix & managing to find replacement cells👍 These are a very useful gadget, I charge mine after each use & once every couple of months, just to maintain the battery & make sure it is ready when needed!

[@BuyitFixit]

Thanks for the tips!

[@Runco990]

It is a mis-conception that you should keep lithium batteries fully charged. This is TRUE for lead acid chemistry due to sulphation. But Lithium cells actually last the longest if you keep them around 80% or less. This is also why their storage voltage is kept low. The industry charges these cells to their near theoretical limits due to squeezing max power at the cost of life time. Because that's what the public wants, maximum run time. However, in critical applications such as medical and military, lithium cells are always "undercharged" for max reliability. And your car will still start just fine! 🙂

[@markpirateuk]

Thanks, the supplied manual says nothing about battery maintenance, I just assumed it would be the same as my old jump pack that used SLA batteries.@@Runco990

[@tonythornton1383]

I really enjoyed this one and thought at one point it had blown yours mains lol. Great fix and great video as always.

[@BuyitFixit]

Thanks 👍 I wasn't sure how this one was going to do as a lot of it was rebuilding the pack, seems people are enjoying it though. Thanks for the feedback 🙂👍

[@JimmyJohnson-ub4rt]

Very well done! That was beyond my skill level but I certainly learned a few things and understand circuit components better now. Wanted to point out the ! button is a safety bypass for when the host battery is below a level that can be detected, the jumper should engage by itself in normal conditions.

[@BuyitFixit]

Thanks 👍yes someone else also mentioned that. I should have read the manual 😂😂😂

[@Softdattel]

Nice job, well done!

[@BuyitFixit]

Thanks!

[@jackking5567]

Excellent. The battery delivery is crazy. I'm surprised the posties vans don't ignite..

[@BuyitFixit]

Thanks 👍Yes I was surprised at the lack of safety concern. That's China I guess for you.

[@trone32]

Loved this repair, & your thought processes

[@BuyitFixit]

Thank you 👍

[@beer_goggler]

Nice repair, even though I was dreading you accidently shorting the new cells. Also soldering over them might not be a super idea. Higher melting point unleaded solder might be better for high current battery connections but you also don't want to much temp in the cells while soldering.

[@BuyitFixit]

Thanks 👍

[@awesomed007]

spot on, the spot welders use that solder on their internal components

[@dubmob151]

What spot welders use solder? Normally they don't use any solder at all.

[@awesomed007]

@@dubmob151 lost in translation, what I meant is, that internals of spot welders have these high output tracks made of such solder, internal connections, etc

[@dubmob151]

@@awesomed007 oh okay gotcha

[@the.resintist]

fair play I love mine not same brand but type and it starts my 1.6 diesel VW golf and I've started my car 10 times on one charge before hitting minimal battery level 😉👌

[@BuyitFixit]

Nice 👍 Thanks for commenting 🙂

[@bertlzansinger]

Thanks for the great video. Also awesome for learning a bit about PCB and soldering. I have been using NOCO for a long time and will no longer use any other booster. Great products. Note: The boost mode is a kind of override that even disables a safety function. This mode is basically not necessary for jump starting.

[@BuyitFixit]

Thanks for that 👍yes someone else also mentioned about the boost mode. Perhaps I should have read the manual 😂😂😂👍

[@andymouse]

If you need jump starts a lot does that not suggest bigger problems ? I've needed a jumpstart once in 40 odd years !

[@WhiteDieselShed]

@@andymouse You probably don't have vehicles sitting idle for weeks/months without being used. My tow vehicle can sit unused for 3 or 4 months at a time and it was becoming a pain have to lug the battery to it each time its needed. I built my own 4 cell pack which can put out a genuine 900+amps without failing after its first use.

[@smithers139]

Wow what a fix ❤

[@BuyitFixit]

Cheers 👍

[@wasdfw]

Very interesting and very good job. Thank you very much.

[@BuyitFixit]

Thank you too!👍

[@merlin5476]

I am amazed at the complexity of that circuit board just to charge a battery.

[@BuyitFixit]

Yes, but it does more than that. It had to boost the 5V input fro the USB to around 12v to charge the cells for car starting, also it has a 5V output, so it has to regulate the voltage from the pack back down to 5v. It also has to manage charging the lithium cells and also monitor that you are not connecting it to the car battery in reverse. Hope that helps explain it in a little more detail.

[@merlin5476]

@@BuyitFixit ok great , cheers. I used to make all sorts of electronic stuff back in the 70's & around 9 yrs ago made a Theremin. Looking at these modern electronics with surface mount devices is something my eyes cant cope with 😅.

[@BuyitFixit]

You and me both. I cant focus on anything closer than arms length now without glasses. I also have a good microscope that shows on a 42" TV 😂😂

[@peter-pg5yc]

i have a heating pad stiff and all age..i took it apart. the connections were slip fit junk they came undone, of course they would. so i soldered connections superglued pad and now 4 years later it still works perfect.. it was designed to fail.. A lot of stuff is like that today.. Wiffy says rice cooker stopped working.. Heat activated fuse blew 50 cents to fix. amazon delivered the exact replacement part..

[@BuyitFixit]

Yes, I've fixed quite a few items at our local repair cafe where thermal fuses have been the issue 👍

[@Lightrunner.]

Hey🤗 nice repair. Wooow😳😳 the car booster power consuption let the mainnpower fail 🤣🤣🤣

[@BuyitFixit]

Thanks👍Yes it took the whole grid down 😂😂😂😂

[@iantcroft]

Great job, stuck to your guns and followed it through to the end! Don’t think I would have had the patience! What’s your day job, be interesting to know.

[@BuyitFixit]

Thanks👍 we have a small farm..

[@iantcroft]

@@BuyitFixit Very nice, with lots of rabbits I see! Great content!

[@jonnyduncan7056]

Well done..

[@BuyitFixit]

Thanks Jonny 👍

[@JB-NZ]

Nice work, but gee you almost shorted the new cells on your pick and then on your scissors a few times, as you were arranging the cells to solder them. I was waiting for the bang....! lol :)

[@BuyitFixit]

Yes, I noticed on the playback. The camera view shows a totally different angle to what I can see on my desk. It would have made the video more exciting if nothing else 😂😂😂😂

[@paulstaf]

I think when you were touching the chip and the resistor with your finger you were triggering the mosfets which started the battery charging. When you pressed hard on the chip, the resistance in your finger changed which turned on the mosfets.

[@paulstaf]

It looks like the traces from that resistor and the chip both go to the mosfets that allow current to flow to the battery from the boost converter.

[@BuyitFixit]

@paulstaf If you check the schematic at 42:02 you'll see the mosfets are driven from the pins at the opposite end of the chip pins 1,3, and the resistors for gates of those are further towards the mosfets. The resistor I was touching goes to VINI and is for current sensing, and the capacitors which go to CDT and CCT are for the Current Charge Time, and Current Discharge Time.

[@John-dp3ln]

I just bought one of these on prime day, distressing to see a broken one!

[@BuyitFixit]

There's loads of broken ones on Ebay. I see then regularly. I'm currently watching a larger model.

[@bbreedo395]

Bravo sir !👏🏾👏🏾👏🏾👏🏾

[@BuyitFixit]

Thanks 👍

[@doncodman913]

FYI i clicked the link for the battery and it shows ''cannot delivery to your address'' . lol.

[@BuyitFixit]

That's a shame 🙁

[@kendoty2463]

Company also sells much more beefy batteries and a case that will fit under this unit and make it much more useful - original battery failed because it was not strong enough. Your battery set is series 3 cell.

[@ThorWithHammer68]

Well done ..like it.. This is my passion as well

[@BuyitFixit]

Thanks 👍

[@paulralph2336]

I have one of these boost packs but not sure if its best to keep it charged or let it discharge on a regular basis to stop this happening with the batteris, could someone advise on this please, excellent video even though i wouldn't attempt it 👍

[@BuyitFixit]

Thanks, I'd just keep it charged up. It's pretty much the same batteries that are in mobile phones and laptops. You don't need to run them flat and fully charge them like you had to do with old battery technologies like NiCad batteries.

[@linusgk5042]

I have been in some batteries where the ic "lock out" when a fault apoears. Some can be shorted and brought back to life.

[@BuyitFixit]

Yes, I had that lockout with the ring doorbell I looked at a while back. This IC doesn't have the lockout.

[@kennybacchus1488]

Noco. Boost. Plus GB40. Lithium. Jump. Starter. Can. l. Fix. It

[@catsnotcops_]

haha I loved the contrast from spending hours on diagnosing a tiny pcb and then going to your tractor 😄 i love your content. your way of diagnosing and fixing electronics really helps me to improve my own skills. im actually surprised, that i wouldve probably had enough knowledge for this fix, but i am lacking a proper way for a pcb diagnosis. looking forward for your content! cheers

[@BuyitFixit]

Thank You 👍🙂

[@Flyinghook]

The repair looks decent, but I would have mimicked the way they extended the solder blob on the main output wires.i feel that way for heat/current management.

[@BuyitFixit]

Thanks, I know it says 1000A but the black relay on the board that controls the output looks like it would melt first....

[@Flyinghook]

@BuyitFixit 1000a is the momentary draw. Starting current. And yes, they can do it. A pretty common pickup's battery is 920 cracking amps, so that 1000 all rating isn't as silly as you think. You have to remember, these aren't the old lead acid jump boxes that can only barely supplement the car's battery, these can start a 6l engine WITHOUT a lead acid starting battery.

[@AndyBanner]

These things are utter rubbish. Had two that failed, one with a bad battery like this. Expensive junk.

[@BuyitFixit]

I think I agree 👍

[@mitchellhw2006]

This episode was like watching an explosive tech defuse an IED. On the edge of my seat and cringing. Whenever I have to work with lithium "spicy pillows" I keep a sand bucket with a metal lid near so I can ditch them if they start burning. A bucket of water works well also to buy some time to get the flaming spicy pillows out the door before they smoke up your shop.

[@BuyitFixit]

Thanks for the advice 👍

[@smbrob]

A 1000 amp, my nose. Still, it got your tractor turning over. Great fix.

[@BuyitFixit]

Thanks 👍

[@ludvigjakobsson9347]

Happy days :)

[@BuyitFixit]

Thanks 👍🙂

[@RoadRunnerMeep]

Great work, do you primarily buy them to repair for content. Or do buy a lot of them to keep afterwards too?

[@BuyitFixit]

A bit of both. When I first started it was repairing Milwaukee tools mainly as I wanted to expand my collection. My wife wanted one of those Dyson fans but they were too expensive so I bought a broken one. I didn't really need this boost pack it was more for content but it will come in handy so I'll be keeping it. Same with the JVC radio I recently did as my wife likes it. The induction wand I repaired will come in handy when I'm fixing our cars as seized nuts and bolts seem to be a common issue😂😂😂

[@Crystawth]

The positive terminal of a Li-Po cell is often Aluminum which reacts with air and forms a layer of aluminum oxide. This is why scraping it allowed the solder to adhere. You can purchase Aluminum soldering flux to help with this in the future as the rosin flux in the solder isn't going to do much to Aluminum oxide.

[@BuyitFixit]

Thanks for that. I often wonder about soldering Aluminium. These were copper underneath. I'm not too sure what the coating on them was.

[@Turco949]

26:20 I, too, have one of those USB charge diagnostic tools and I thought mine was a one off in design where when using the standard USB 2/3.x connector, the display ends up facing the floor. I see that yours is the same way. Whoever designed that tool was an idiot! LOL

[@BuyitFixit]

😂😂😂😂

[@robertstuckle6198]

Thank you so much

[@BuyitFixit]

You're most welcome👍

[@ralphmenta7997]

i know 4 other people, besides myself, that have had trouble with this brand. I personally had the GA20, 500amp, and if it wasnt the logic board denying the connection, 50% of the time they insisted my polarity was wrong. Honestly it sucks because this rig isnt bad looking works in a pinch. I dare someone to lookup any sort of nonsense or shity talking that led to free stuff. There is NONE, and never will be. I give my straight up thoughts if i am getting paid, or HAVE TO pay. Just becarefull yall

[@BuyitFixit]

I did work on the tractor, but a couple of weeks later I tried it on my wifes landrover but it didn't turn that over. Someone else in the comments had the same issue with his landrover too. I had to resort to the old jump leads. I personally wouldn't recommend these.

[@Dr.-Smart]

i may not be a significant youtuber to make this comment , but anyways , puffy lipo or lifepo4's can be "vented" just puncture them with a needle *obviosly be carefull not to short anything* then "vice press" / compress the cells + seal the vented cell . And then manually charge them with a adjustable bench power supply .

[@BuyitFixit]

Hey no problem, I'm not a significant youtuber either 🙂. For some reason I'm a little more weary of these pouch cells. Might be because I've not had a lot of experience with them. I've no problem using the bench PSU on dead 18650s etc as I've had more to do with them. Thanks for the advice and comments 👍

[@Blacklab99]

I’m a nervous wreck now, watching that!

[@BuyitFixit]

It's fine, the black and red wires were isolated by the relay, and I was being quite careful not to short the cells 🙂

[@cengiz6170]

Merhaba batarya değişiminiz ve arıza çözümünüz harika. Bu paylaşım hiçbir yerde yok. İlk defa sizden izledim. Çok teşekkür ederim. 👏👏👏 Pravo İşlerinizde başarılar dilerim. Saygılarımla.

[@doncodman913]

HI ya . At 17.13 on video ...the scissors almost shorting the terminals..cringing. Regards Don.

[@BuyitFixit]

Yes, you get a different view to me via the overhead. I didn't realise at the time, but it might have made interesting viewing 😂

[@JoeCentralTech]

Nice fix

[@BuyitFixit]

Thanks 👍

[@TheTomco11]

You'll find that basically all jump packs will massively over drive the cells. They're generally rated for a continuous discharge, so they can handle more for the few seconds it takes to start a car with a flat battery. Not to mention the current the starter peaks immediately and drops quickly. Also longevity isn't really a concern for them as they're unlikely to get anywhere near the ~1000 charge cycles you'd expect from a lithium battery in normal service

[@BuyitFixit]

Thanks for sharing 👍

[@djtongi]

i mean.. okay reworking the board is fine... but to get and solder those cells imho is too dangerous. i wouldn't keep that thing in my home, coming home some day realizing that cheap china cells, where nobody knows where they came from, shorted internally, ignited and burned the entire house down... what would you win then?

[@BuyitFixit]

Thanks for commenting 👍 The original cells were also soldered. I wonder where the cells that were in originally came from? They had the exact same markings as the cells that were replaced 🤔 These pouch type lithium cells are found in all kinds of devices these days. Especially stuff bought from China, cheap tablets, replacement laptop batteries etc, disposable vapes...

[@ovalwingnut]

InTeReStiNg (again!) I'm also DaZzled and impressed with that manly "little" soldering iron that has taken on such a big BIG job :O) Ya' got to love that UK 220VAC (when it's working:). I'm 120VAC handicapped :O\ Thank you for the video! GR8T post editing to boot.

[@BuyitFixit]

Thanks 👍

[@Rs500ybd]

The Bms is on the Main Board. I Have two of these they are Gash. Ok For Charging a phone But as a Jump Starter Nahh.Remember Bullshit Baffles Brains.

[@BuyitFixit]

😂😂😂Yes, I ended up replacing the BMS chip due to it being faulty.

[@Carlosmartinhox]

I regret to inform you but this device is defective...Complaint to the company...😂

[@BuyitFixit]

😂😂😂😂

[@robw4476]

I have a GB50 boost pack, rated at 1500amps and it starts my 3.6 TDV8 Range Rover easily, one thing is you should only need to press the boost button if the vehicle battery is very low, if it still has some power in it the pack will detect it if its connected the CORRECT way and start boosting automatically, if its reversed polarity it protects the pack and the vehicle. When you use the boost button it just turns on the 12v to the output with no protection.

[@BuyitFixit]

Thanks for that Robin, I just fix things.. I haven't a clue how to use them 😂😂😂😂 I probably should have read the instructions 🙂

[@TechGorilla1987]

This tip is legitimate. I have an old school 12v air pump. It needs a battery connection to work. If I press and hold the NOCO button, I get the full power/amps @12v out of this pack and it runs the air compressor very well. This is an older style all metal air pump from a few years ago. Like a tank it is and power-hungry.

[@Stefan_Van_pellicom]

Three of these cells together, just a paper tape between the contact strips, promising to deliver 1000 cold cranking amps, on a plane trip from China. And I have to take off my belt at airport security?

[@BuyitFixit]

😂😂😂😂😂👍Indeed

[@senffabrik4903]

Imagine, you put 5V in. By tiny USB thingy. then some magic 1000 Amps with 12V. Holy cow.

[@BuyitFixit]

That is 5V in over quite a long time though. I forgot how long it took to charge, and the 1000A is peak current only for a very short time.