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

In this video we're going to be looking at a Noco Boost Plus GB40 Lithium Jump Starter. It was advertised on eBay as not turning on and not charging.
Let's get it on the blue mat and see if I can figure out what's wrong with it and hopefully repair it!
I'm not an expert, but I do enjoy trying to fix things.
If you enjoyed this video, or found it useful or helpful, please consider subscribing. It's free and you'll be notified when I upload more videos.
Thank you for your support!
Link to the cells that I used:
www.aliexpress.com/item/10050...
Some of the tools that I use:
The Famous Blue Mat: amzn.to/47bPNGK
170 piece electronics tool kit (security bits): amzn.to/3FGLWpr
Aixun T3A Soldering Station: amzn.to/3u2SBri
Infiray P2 Pro Thermal Camera: amzn.to/47c05Xm
Soldering Flux: amzn.to/3Qn8Yq7
Low Melt Solder: amzn.to/3QICZ5r : Cheaper Alternative amzn.to/3G4L3XK
Grinding pen: amzn.to/3QCHE7v
Component Tester: amzn.to/46UcHm6 alternative (slightly cheaper) amzn.to/49yZSzJ
Overhead Camera Mount I Use: amzn.to/3tX8Ar4
Microscope Light (I use on my Trinocular): amzn.to/3FEAPgy
AD409 Pro Microscope 10" Screen: amzn.to/3G0CI7P
Extra Long Torx Drivers(used on Milwaukee radio): amzn.to/40siUU3
DC Power Adapter plugs 38 PCS: amzn.to/49lCUMm
USB Power Meter Tester: amzn.to/3T1hD4J
#electronicsrepair #electronics #repair
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[@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. 😂

[@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 🙂

[@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.

[@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..

[@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 😊👍

[@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? 😕

[@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 😂😂

[@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 👍🙂

[@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.

[@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 👍

[@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 👍

[@bigjim485]

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

[@BuyitFixit]

Thank you so much!

[@iantyler4045]

You've got way more patience than I. Well tracked down and a nice repair and test. A handy thing to have.

[@BuyitFixit]

Thanks Ian 👍

[@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.

[@ag-om6nr]

Very impressive troubleshooting ! The NOCO is anice unit that can be used on a dead battery ! Nice to see it resurrected !

[@BuyitFixit]

Thank you kindly sir 👍

[@rigmaster1]

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

[@BuyitFixit]

Thank you 🙂👍

[@German_byte]

I certainly did enjoy the video. Very satisfying to see the jump starter brought back to life.

[@BuyitFixit]

Thank you 👍

[@xzytqweo3538]

I have learned so much watching your videos. Thank you for making them

[@BuyitFixit]

You are so welcome!👍

[@Martyn-ey9lw]

Yet another cracking video. Proper diagnostic skills, unlike some other channels although still enjoy watching them, I can honestly say yours is the only channel I look forward to. I have one of those but it's the 1500 and that starts my Citreon Relay L4 H3 from a totally flat battery, so flat had to use the key to get in as the fob wouldn't open the door locks, turns out the battery was faulty from new. Keep them coming.

[@BuyitFixit]

Thank you Martyn 👍Appreciate the feedback 😊

[@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 🙂

[@richierich.1982]

I thoroughly enjoyed this video, not only an indepth repair, a proper test of pack as well. 👍

[@BuyitFixit]

Thanks 👍🙂

[@kriswillems5661]

You've a pretty good understanding of electronics and are very patient. Nice video.

[@BuyitFixit]

Thanks Kris 👍

[@NoobCannon1234]

Your one of My favourite Channell’s, your content is informative and fantastic. Thanks :)

[@BuyitFixit]

Thanks so much 👍Really appreciate your feedback 😊👍

[@CuriousFocker]

Great video, watched from start to finish and then subscribed. Now to watch some of your older vids. What a way to spend my Sunday afternoon 😀

[@BuyitFixit]

Thanks Richard 👍

[@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 👍

[@waynesharp1690]

Wow they actually work. Great repair 👌

[@BuyitFixit]

Thanks 👍

[@TR19]

This is the kind of stuff i come to youtube for. Subscribed

[@BuyitFixit]

Thanks, I'm sure you will be impressed with some of my other videos 🙂👍

[@mikefranky]

I bought the Gb70 model 2000amp took a chance from John Pye auctions came in at £70…Roughly £200 in shops… It’s been brilliant holds a full charge for over a year…only slight issue the charging port has slipped inside so can only be charged through cigarette lighter port in the car…But works great Excellent work in the video ❤

[@BuyitFixit]

Thanks Mike 👍

[@Riskify74]

Stumbled across the channel - love it.

[@BuyitFixit]

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

[@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.

[@charlesmott8863]

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

[@BuyitFixit]

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

[@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 👍

[@ashleywright7671]

Great video, reminded me of building surface mount boards at uni a lifetime ago,

[@BuyitFixit]

Thanks 👍🙂

[@trone32]

Loved this repair, & your thought processes

[@BuyitFixit]

Thank you 👍

[@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 🙂

[@rory9174]

This may be the answer why some of my 20v tool batteries wont charge, even after fully charging the 18650 cells individually. Enjoyed every minute of this video, thank you so much.

[@BuyitFixit]

Thanks Rory👍I wasn't too sure how this one would go, as a fair chunk was rebuilding a new cell pack. Thanks for the feedback 🙂👍

[@rory9174]

@@BuyitFixit I was delighted that noco didn't sell the battery pack cause I really wanted to see how that pack was put together. I know it was a lot of work for you but what a great video this is. Amazing how something so small can start a tractor. Have a great week and see you next Saturday.

[@telecomsuk]

If the batteries are lithium ion they can go flat if left in tools and the voltage drops below a threshold and the charger can’t “see” it. Put 12volts across the battery’s plus to plus , minus to minus for 15-30 seconds.

[@599miata]

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

[@BuyitFixit]

Thanks 👍

[@geraldkrause8840]

Very interesting and methodical repair.

[@BuyitFixit]

Thank you 👍

[@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 😂😂😂

[@alan4yt]

Well done as an electronics guy you are braver than me mate.

[@BuyitFixit]

Thanks 🙂👍

[@wasdfw]

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

[@BuyitFixit]

Thank you too!👍

[@pavanopatha4399]

those two terminals so close to contact with the new batteries! 😰 you are much braver than i am my friend. i am trying to build a jump pack from scratch, learned a lot from your video. I thought it needed 4 cells but 3 also works it seems.

[@BuyitFixit]

Thanks 👍If you mean the red and black wires, they are isolated via the black relay on the board, so if they touch nothing would happen. Good luck with you're jump pack 🙂

[@pavanopatha4399]

@@BuyitFixit ah that explains it. Thanks again for the very informative video. 👍🏾

[@BuyitFixit]

You're welcome 👍

[@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.

[@tomaszski9818]

Well done as always, waiting for more fixes.

[@BuyitFixit]

Thanks 👍New one out tomorrow 🙂

[@Theoppositeofchaos]

Knowledgeable guy two thumbs up

[@BuyitFixit]

Thanks 👍👍🙂

[@thetraindriver01]

Cracking job, nice perseverance 👍😊

[@BuyitFixit]

Thanks 👍

[@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 👍

[@andyd8185]

I noticed your channel and I must say it was interesting to follow the mystery of the faulty battery pack that I own as well. Thankyou for a great and very thorough video.. fantastic job!! Cheers from Canada Andrew

[@BuyitFixit]

Thanks Andrew 👍Greetings from the UK 🙂

[@eingeordnet]

Good job well done, a pleasure to watch! And the feeling of getting such things repaired is so satisfactory - worth much more than these much too expensive nocos cost. At least that is my experience from working in a repair cafe or tinkering for myself...😊

[@BuyitFixit]

Thanks 👍yes I volunteer at our local repair cafe too 🙂

[@TranTek]

Always enjoy your great skill of troubleshooting 👏

[@BuyitFixit]

Thanks 👍

[@keithnsearle7393]

And another good repair. You do a very good job of finding faults that even the manufacturers do not know about. Call to the manufacturer; can I get a battery replacement? Manufacturer said; No just chuck it into the bin. Hobbyist says; Oh, I will fix it then. Manufacturer says; no, no, no! Hobbyist says; I have already fixed it. Manufacturer says; How did you do that? Hobbyist says; I do not give out any secrets. Repairs are good for products that even some manufacturers do not know about.

[@BuyitFixit]

Thanks 👍I'm not sure if you saw the FLIR thermal camera video, or the Solar inverter I repaired and then I needed a service code which they wouldn't give me ("no password, no problem" video). That was literally the manufacturer in both cases saying sorry..chuck it. So I fixed both and gave them a piece of my mind. The videos are on my channel and I put the emails I sent and received from them in the videos too 😂😂😂

[@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 👍

[@smash7777-]

Cool vid bro! You earned your battery pack indeed. Good job fixing it and not sending it to landfill. I’ve got a few things in various stages of “fixed” laying around my place! 👍

[@BuyitFixit]

Thanks 👍😂😂you and me both!

[@davidlamberson5435]

Your a far better man than I Gunga Din! Keep up the interesting videos.

[@BuyitFixit]

Thanks David 👍

[@tomharris1457]

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

[@BuyitFixit]

Yes, something like that 😂😂😂👍

[@chrissmith7655]

Hi awesome job. Many thanks.

[@BuyitFixit]

Thanks Chris 👍

[@secretsquirrel7788]

a great video your so patient with problems

[@BuyitFixit]

Thanks 🙂👍

[@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 👍

[@marksantos2276]

That was AMAZING to watch.

[@BuyitFixit]

Thanks Mark 👍

[@mtnsofutah]

WOW, I just love watching you!!!

[@BuyitFixit]

Thanks so much 👍😊Really appreciate the feedback 👍

[@jeffbarrett1787]

Very interesting and educational thank you for sharing

[@BuyitFixit]

Thanks for sharing your thoughts 👍

[@andymouse]

That was a nice catch ! and a great Tractor...cheers.

[@BuyitFixit]

Thanks AndyMouse 👍

[@4586johnc]

Very interesting fault finding. I’ve got the same booster which I have used a couple of times. Very helpful description of what does what. Hope I never have to delve inside it.

[@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

[@graemezimmer604]

Hi! I have one of the larger Noco's and it's a wonderful device. It has save my neck a number of times. So I was very keen to see just what is inside these things.

[@BuyitFixit]

Nice 👍Well I don't think anyone else has stripped one down this far, or if at all, so hopefully it didn't disappoint 🙂

[@ambersmith6517]

that was nuts great work!

[@BuyitFixit]

Thanks 👍😂😂

[@barmanvarn]

Good video. I have one of these in each of my vehicles. Reminded me it was time for me to charge each one up for the winter.

[@BuyitFixit]

Thanks 👍Glad it was helpful and reminded you 🙂

[@triplexdread]

Crackin fix pal well done

[@BuyitFixit]

Thanks mate 👍

[@mattc3385]

Impressive repair.

[@BuyitFixit]

Thanks Matt 👍

[@rodgersandrodgers8191]

You put together an interesting video. This is not something I'm likely to ever do, mainly because I do not understand how the interior of these electronics work so I would not do this. But, you put together an interest in enough video that I subscribe to it. Thank you very much.

[@BuyitFixit]

Thanks 👍I do try and repair a wide range of electronic and sometimes mechanical devices 🙂

[@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 😂

[@ranjitsian5481]

Good work 👍

[@BuyitFixit]

Thanks Ranjit 👍

[@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 🙂👍

[@TechGorilla1987]

I have one of these units. I find that it has worked flawlessly. I use it as a huge power bank for various things.

[@BuyitFixit]

Yes I had been thinking that too. Handy little device and pretty much brand new now 👍

[@w5cdt]

Good job! Persistence prevails.

[@BuyitFixit]

Thank you kindly 🙂👍

[@johnbravo7542]

Excellent job.

[@BuyitFixit]

Thank you very much!

[@Mymatevince]

Brilliant as always!

[@BuyitFixit]

Thanks Vince👍 much appreciated mate. I'll have a watch of your latest video shortly, just been bogged down editing the one I'm releasing later today 🙂👍

[@Mymatevince]

@@BuyitFixit I know that feeling only too well Mick. Your not missing much, nothing in there too challenging. Enjoy the weekend buddy👍

[@sunsys0]

Great job 👏👏👏

[@BuyitFixit]

Thanks 👍

[@SpikeXtreme]

Great video .. i have one in my car boot for emergencies .. bit worrying it was a manufacturing defect.

[@BuyitFixit]

Thanks, all items have a certain percentage of faulty or returned units. I've not had a lot to do with these boost packs can't really advise.

[@zombieryder]

Yay ....nice fault find, really enjoyed vid.

[@BuyitFixit]

Thanks 👍

[@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 😂😂😂

[@georgeholme612]

Fantastic video

[@BuyitFixit]

Thanks 👍Hopefully you'll check out some of my other work. I've repaired some quite interesting stuff 🙂👍

[@MurrayMints]

Absolutely brilliant video. You've done yourself a favour there mate. And if you can charge this on a couple of solar panels even better. 👍🏻 keep these videos coming. I'm nearly an expert 😂

[@BuyitFixit]

Me too 😂😂😂Thanks Murray 👍

[@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 👍

[@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 👍

[@larsskytte]

impressive - you earned my subscription

[@BuyitFixit]

Thanks 👍Please check out some of my other work. I've done much better repairs than this one 🙂

[@ThorWithHammer68]

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

[@BuyitFixit]

Thanks 👍

[@lmwlmw4468]

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

[@BuyitFixit]

Thanks 👍

[@flyingdutchmanindustries5877]

Ha, you have a tractor. Dude, that's so country! You sound like a city boy, and you repair complicated electronics. The tractor was a total surprise. Well done 'mate'. :)

[@BuyitFixit]

Thanks mate 👍yes moved to the country a few years back.

[@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😉

[@MrGreenperil]

Great detection sir. Bmc at fault on them tiny smds. Another unit saved 👍

[@BuyitFixit]

Thanks 👍

[@JoediyLab]

Very nice video, Thanks

[@BuyitFixit]

Thank you too 👍

[@fieldie]

This is super interesting to me as I have the exact same booster pack! So if mine ever goes wrong and won't charge, now I know what's wrong with it....... oh and who to send it too for repair! 😂 great video thanks mate!

[@BuyitFixit]

😂😂😂😂😂Thanks 👍🙂

[@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.

[@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

[@user-bd1pk1rc1x]

At One point I wondered if replacing the contacts in the plug might have been the trick. Seemingly did 2 things at once, however no such luck. Yet another great video and fix. Good to see it tested on the Tractor. My Big, jumper, inflator, light has packed up. Been wondering about getting something like this for ages, they just seem SO small. Will have to maybe get one now though 🙂

[@BuyitFixit]

Thanks 👍I'm not too sure how great these are, after making the video I needed to use it on my wifes landrover and it didn't do a good job of starting it. Ended up having to resort to using my car and a set of decent jump leads so perhaps I'd do a little more research before buying one.

[@user-bd1pk1rc1x]

@@BuyitFixit Thanks for the advice, I think from what I can find, as with most things. You get what you pay for. Can be such a useful bit of kit though. Ideally would need a jump starter and a pack to run my Ham radio on, that would be KEWL, unfortunately boosting and running are 2 different jobs.

[@randydell4131]

Very Nice Sir!

[@BuyitFixit]

Many thanks 👍

[@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 😂😂😂😂👍

[@HDRW]

You're a lot braver than I am - the chances of shorting out the cells, resulting in violent self-dismantling, is far too high! (Also I'm clumsy...) Well done!

[@BuyitFixit]

Thanks 👍🙂

[@pjhb_microsoldering_portugal]

Very good video 👍👍👍 Greetings from Portugal 🇵🇹

[@BuyitFixit]

Thank you 👍and greetings back from the UK. Hopefully your weather has been better than ours 😂😂😂😂

[@pjhb_microsoldering_portugal]

@@BuyitFixit We are having storm after storm here 😭. Better days will come 😉 Really like your videos, thanks for sharing.

[@BuyitFixit]

@@pjhb_microsoldering_portugalThanks, hope you weather gets better soon. Best wishes 👍

[@jeffbarrett1787]

Brilliant. I’m sure you wanted a quick fix, as I did for you, but as it turned out made for a more interesting video

[@BuyitFixit]

Thanks Jeff 👍