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Hi,
First off, I have a non rooted, stock Galaxy note. It's not modded in any way.
The problem started occurring yesterday, all was just fine before. Since then, it won't charge no matter what USB cable or charger I use.
1) Phone on
- I plug the charger to the phone : nothing. The phone doesn't register being connected to the OEM wall-charger.
- I connect the phone using the OEM USB cable to my computer (tryed 3 different computers) : Nothing.
I also tried another charger and several USB cables : no luck.
2) Phone off
- I plug the charger / I connect my phone to a computer using USB cable : the phone boot up and doesn't charge the battery.
Any thought ?
Thx in advance.
Try using some compressed air to clean out the usb port on the Galaxy Note. I had a similar issue with an iPhone once and there ended up being a piece of lint stuck on 1 of the contacts which made it unable to charge. Could be the case with your phone. Other than that contact Samsung and see what they can do for you.
Thx for the advice.
I'll try that out and call over Samsung.
Try factory reset if that could help..
Sent from my GT-N7000 using XDA App
Update:
I tried a micro USB Host Cable (OTG Cable) and it's working fine : recognized and plugged in USB stick is working fine.
Also, I tried a factory reset after backuping my data. All went fine but sadly the problem is still there : no charging.
More update:
After two days, It started working again as if it never happened.
Still wondering what might have caused it
Might be the dust that settled on the battery pins and the contacts on your phone.. happens some times .. glad its back to work.. poor thing..
Amande said:
More update:
After two days, It started working again as if it never happened.
Still wondering what might have caused it
Click to expand...
Click to collapse
Happened to me too! It wouldn't charge until I turned off the phone. It worked after I cleaned the phone and usb cable's metal parts--sorry no correct jargon for this--with rubbing alcohol. Make sure there's no lint left from the cleaning.
Yup, had this. On charge with stock charger in the mains. Battery dropping fast, back (top) getting warm. I turned the screen off, left it for 5 mins. Looked again, it was 2% less!
Reboot fixed it.
There did not seem to be any rogue program using the CPU, but I now have a meter and a better logger to examine this if it occurs again. I assume the system got into a loop somewhere, although the phone was normally responsive.
holgalee said:
Happened to me too! It wouldn't charge until I turned off the phone. It worked after I cleaned the phone and usb cable's metal parts--sorry no correct jargon for this--with rubbing alcohol. Make sure there's no lint left from the cleaning.
Click to expand...
Click to collapse
Happening to my phone as well right now. I was worried that the battery is dying so I got a spare online. But it doesn't make sense that its charging and know that it is on one state and not the other.
I panicked so I replaced Rocket Rom with Cassie's. It's still doing this.
Have you guys checked if there is a weird smell from your battery? I thought that was something to look at but dont all batteries smell like that?
galaxy note is experiencing the same hardware problems as galaxy s2 phones. I am very pissed off at samsung. I bought a new galaxy note in dominican republic and after one month of delicate use the phone developed charging problems. Drive mode would start automatically or the phone would shut off all by itself and a battery removal reset would turn the phone on again. then finally, the phone would stay in charging mode even after the usb charge cable is removed. the phone would discharge quickly and then would not turn on. I finally gave the phone to repair dept at claro phone company. they would not fix it and are just showing me a middle finger. Now I guess, I would have to learn to change the charging port myself. After seeing galaxy s2 videos, I see many ribbon contacts would get corroded and need to be cleaned frequently. Many phones were just less than 2 months old and had so much corrosion on the contacts. this is bad design and I think the high current draw for a dual core phone of that huge screen size is causing all kinds of electrical corrosion on the contacts inside the phone. this sucks majorly as I loved the phone when I had it working fine. Now I think I have bought a problem with my saved cash. I will try to repair my own phone soon as I get it back from the repair dept.
My Galaxy Note is doing a similar thing. Not all the same symptoms, but a few similarities.
The other night, when the charger was plugged in the phone kept changing it's mind whether it was plugged in or not - probably every few seconds I was getting the chime it makes when you plug the phone in. I eventually managed to charge the phone by turning it off, removing the battery, replacing it, plugging the charger in, waiting for it to start charging, then turning it on.
Today my phone was trying to tell me it was charging when it wasn't even plugged in to anything!
As with the above post, my phone has been getting hot occasionally and the drive mode has started by itself a few times.
I've used three chargers and four cables.
I'll be taking it along to where I bought it from later on today.
Battery not charging
G Note Battery is not charging .. same problem as of 1st post.
Changed usb cables, chargers, thru PC, laptop, direct wall, cleaning etc
Every thing fails. one month old set ?
OMG, glad to know I'm not the only one. Bought a Galaxy Note from a brazilian network provider (VIVO) and after 1 week of usage I'm experiencing the same problems as you guys.
My phone will only charge when it is powered off and USB connection does not work anymore (even in download mode). Before the problem onset, I noticed some MTP connection and SD Card rescanning without connecting to the PC.
Did a factory reset and got no results. Downloaded Odin Mobile and flashed stock rom and the problem persists.
Has anyone found a fix or the cause for this?
Thanks!
Missing my old Galaxy S...
Strange! After a full night charge, now I can unplug and plug the battery and continue charging from where I stop without turning it off.
I can now get beeps when connecting to PC. It show MTP-Inicialization in the Note screen but I have no access to to Note partitions in Windoes Explorer.
Update: One more strange thing just happened now.
Went to college and left it charging. When I came back at night, tried to connect the Note to the PC and everything is working ok now.
What?!?! Now I'm confused. How can I send it to warranty now? I think I'll have to wait a couple more days.
issue as well
That is my 3rd galaxy note, first one screen cracked, second dont ask me why it was not modified at all but it was so sluggish and froxze all the time, my 3rd one it is rooted device and i have similar issue...I am thinking is it because i was charging it from my wife's htc one phone? I thought they would have the same pins...anyway it is doomed, i tried so many chargers and problem not solved
ok i can comfirm to everyone that i have fixed the problem by buying contact cleaner spray and sprayed inside the usb and beautiful all back to normal!
Nooo..
Have a charging problem as well :/ It detects the charging cable and shows the battery icon with the circle about to charge. But it just turns off before it starts charging, turns on shows the icon again, turns off, turns on, shows the battery icon and so on. I have tried with two different chargers. For me i looks like the voltage is too low? Maybe the battery needs a jumpstart? I'll just leave it in the charger and see what happens. Suggestions welcome
Edit: It's just two weeks old, damn it. Last night I used it untill the battery was empty. That is why I think the voltage is so low it doesnt accept charge.
Edit2: Fixed! Puh! I was right. Battery needed a higher mah to start the charging. Leaving the post as it is for future reference.
same problem here, however it charges from my laptop... how strange?
hi
i have a problem with my SGN the device keep telling me its charging even when i disconnect the device from the charger i have tried to flash a new kernel with no luck the problem remain and i have flashed a new rom and made a full wipe and im still getting this error dose any one knows what's causing this problem help me please
thanks in advance
Dirty micro usb connector
You might try this. It fixed mine, which is why I wrote it
It might "look" ok, but get a strong power loop (15x) to really get a good
look at it.
http://forum.xda-developers.com/showpost.php?p=25102882&postcount=18
I had the exact same problem last week. Ics was unusable due to pop up: charging paused. Voltage to high. Even when usb was unplugged.
I fixed the problem by running the battery flat. Charged to 100% ran fully flat again and then charged again. No problems since. I think the problem was caused by flashing cm9 when on charge. Sounds unlikly but its all i can think of.
Hope this helps
Sent from my GT-N7000 using xda premium
hero-guevara said:
hi
i have a problem with my SGN the device keep telling me its charging even when i disconnect the device from the charger i have tried to flash a new kernel with no luck the problem remain and i have flashed a new rom and made a full wipe and im still getting this error dose any one knows what's causing this problem help me please
thanks in advance
Click to expand...
Click to collapse
this problem has been discussed earlier. please do a research and you will see a solution. the problem is hardware not software. take the battery off and then push the usb pins straight insde the phone. take a tiny screwdriver and push the usb pins in the usb port of the phone straight back inside the phone. problem solved.
Final solution to charging problems
Guys, stop messing around with cleaning and pushing before you do more damage to your Notes.
http://www.ebay.ca/itm/180772505164...X:IT&_trksid=p3984.m1497.l2649#ht_3514wt_1002
arrived today, 7 minutes later replaced and all good and working perfectly. It is really easy to do that (unless of course you have warranty, in that case just have Samsung do that for you - I couldn't because Samsung does not give a flying f**k about customers in Canada who happen to prefer the International version of their own f**ked up product - especially with the COMMON problem like this one)
There is a video tutorial on YouTube about opening the note, for this particular part it takes total of 12 philips screws and prying the case with plastic case opener - I ordered this tool of e-bay as well)
You don't need to be an expert to fix this problem...
You get an airbrush and blow some air on your phone's micro USB port. Do it a couple of times and you should be good to go. Some logical reasons why you get this problem, is that overtime some lints and dusts can gather and accumulate on the insides of your Note's micro usb port.
A simple airbrush is all there is to it.
I my case i tried cleaning with air, with alcohol while it was in the phone and when it was removed from phone and nothimg helped. Replacing the 16 dollars part fixed the problem (hopefully) permanently
Sent from my GT-N7000 using xda premium
Just to chime in with my own experience. I started having this problem a few weeks ago. The phone would keep telling me it was charging, even with it not connected to any charger, or would constantly flash the battery icon in the notification bar from charging to not charging continuously. Even rebooting the phone did not help at all. When the phone was off, the screen would continuously show a grey battery, then a green battery with the indicator dots below it saying it was charging (and it was not even connected to a charger). Since the phone was constantly keeping itself awake from turning itself from a charge state to an uncharge state, it would drain the battery quicker than usual, about 10%/hour when screen was off on ICS.
At first cleaning the ports with a interdental brush and some alcohol and then blowing some compressed air helped for a few weeks and then the problem came back. After that, cleaning the ports did not work. I have also tried pushing the usb strip inside the port in as suggested above and that did not work.
I figured it was a hardware problem as I did a search and I saw that the Galaxy SII and GNexus (which are also 2nd generation Galaxy S phones as the Note is) were also having the same problems as well, and the result in most cases was to replace the charging port. In fact there is a 17+ page thread in the GNexus forum where the charging ports are problematic here on XDA. I guess the charging ports in this generation of phones are not that great as I have never had a problem with the charging ports of both my Epic 4G and Nexus S 4G (which were from the 1st generation of Galaxy S phones).
Since I am in the USA, Samsung USA will not fix my phone since it is an international version, and I don't want to ship it out of the country, wait weeks, pay a lot on shipping costs, and hope they actually do fix it. So I decided to fix it myself.
So long story short, I ordered a new charging port from eBay (~$10 shipped) and a set of Samsung phone maintenance tools (small phillips and torx screwdriver, tweezers, a pry tool and 2 guitar pick looking tools) from eBay (~$3 shipped) and watched a few disassembly videos on Youtube and did it myself. It was actually very easy to do and took me no more than 15 minutes. All fixed now, no more "phantom" charging, no constant annoying phone waking-up-by-itself notification beeps, etc.
My solution
Same problem here too...but thanks to some posts in XDA, I could determine that it was basically a result of dirty USB connection points.
So, I used a tooth brush to gently rub and clean the connection points from the outside ( without dissembling the USB port- not that adventurous u see!).
After a little bit of cleaning and blowing air into the port I switched on the phone and the problem was gone!:good:
Been just a couple of hours since the 'treatment'- will keep you guys posted if it comes back...fingers crossed!!
knedge said:
Same problem here too...but thanks to some posts in XDA, I could determine that it was basically a result of dirty USB connection points.
So, I used a tooth brush to gently rub and clean the connection points from the outside ( without dissembling the USB port- not that adventurous u see!).
After a little bit of cleaning and blowing air into the port I switched on the phone and the problem was gone!:good:
Been just a couple of hours since the 'treatment'- will keep you guys posted if it comes back...fingers crossed!!
Click to expand...
Click to collapse
Good luck!
Hopefully yours continues to work after the cleaning. Mine did the same thing for a couple of weeks after cleaning it and no amount of cleaning or pushing the pins back worked. I finally broke down and bought a new charging port and did it myself (see my post above yours). In fact, since I did that fix, it has been forking flawlessly ever since. I still think it's a common problem in the 2nd generation of Galaxy S devices (GS2, GNote, GNexus) for whatever reason since it hasn't happened to either of my 1st generation Galaxy S phones (Epic 4G and Nexus S 4G). Maybe a bad batch of charging ports for our phones possibly. In fact I'm thinking about buying another charging port as back up if it does happen again just so I don't have to wait a few days for the part to arrive.
If it does happen again and cleaning doesn't work, then I really do suggest changing the ports. It is really easy and their are several videos on YouTube that show you how to open and take apart your phone. You can buy everything you need off eBay for about US $15 (charging port and Samsung tools).
Hi all. There is a standalone way to charge the Note GT n7000 battery? I'd like to try if it works before buying a new usb module but without battery I can't.
Thank you very much.
Hi all,
I've noticed today out of nowhere, that my Galaxy Note keeps turning it's screen on due to being connected to a charger, when it hasn't. I've tried turning the phone off since it was seriously draining my battery, but it turns itself on and goes to the battery meter and then restarts again. The charging symbol appears when using the phone on and off, and I was just wondering what I could do to fix this?
I've tried flashing a new ROM incase but the problem is still there :/
Thanks in advance!
Try cleaning the contacts on your usb port.
Also your usb port could be damaged.
I have also a similar issue on my n7000 I replaced the port and its fine now Samsung ports from factory are crap
Sent from my GT-N7000 using xda app-developers app
ShahinTehShiz said:
Hi all,
I've noticed today out of nowhere, that my Galaxy Note keeps turning it's screen on due to being connected to a charger, when it hasn't. I've tried turning the phone off since it was seriously draining my battery, but it turns itself on and goes to the battery meter and then restarts again. The charging symbol appears when using the phone on and off, and I was just wondering what I could do to fix this?
I've tried flashing a new ROM incase but the problem is still there :/
Thanks in advance!
Click to expand...
Click to collapse
It also happened to me. I had to open up the Note and clean up the usb port to get rid of the problem.
Phone Charging when Not Plugged In - The Definitive Answer
Samsung Galaxy Note
I've had same problem as reported by many others with phone displaying charge icon when not plugged in. I've tried all the recommended solutions. Here's what I've found:
1. Not related to JellyBean update (it happened just after I updated but turns out to be coincidence)
2. Factory reset or flashing doesn't help (it's a hardware problem)
3. Clean out the USB port (there's all kinds of fluff, dirt, lost keys, foreign coins etc in there!) - don't use soapy water for this...
4. Bend the pins (gently) so that they are located in the centre of the port.
In my case it's the charging cradle I was using that was damaging the port. I'm using a flip-case on my phone which means the phone doesn't fit in the cradle properly and I was having to force it to sit on the connector. The pins had become bent and were shorting out against the edge of the port.
Replacing the port is painless, if you have any mechanical aptitude. Numerous youtube videos show how to change it.
Takes about 15 minutes. Just make sure you get the correct port. If you get the wrong one, you're signal will degrade
considerably
I had the same problem and I have managed to solve the problem by replacing the usb port. I bought the usb port from ebay but you must open up your note first to see which revision of usb port board you have inside the phone. I think it makes a difference so the revision number has to match with the old port.
Cleaning the port and straightening the pins helped for a few months but then the problem came back again. changing the old port for a new one solved the problem. I think their usb ports in galaxy phones are crap.
Hello,
I have problem with charging. The phone is charging very slowly or not at all. Sometimes I can pull out and plug in and then it starts to load (but slowly). I checked other chargers and cables. I wiped all and installed new roms and nothing changed. Yesterday I saw that phone is charging in TWRP (but not always). What could be the reason? Battery, usb port?
Thanks.
Turn it off and try to clean the USB port. Most of the times it's not damaged, just dirty as hell.
Use tootpicks or q-tips, blow it, whatever. Just try to get it clean.
I managed to buy a new bottom pcb with usb port on ebay for less than £10 when mine burnt out. Does the port smell of burning?
Very easy to change if this is your problem
rmrbpt said:
Turn it off and try to clean the USB port. Most of the times it's not damaged, just dirty as hell. Use tootpicks or q-tips, blow it, whatever. Just try to get it clean.
Click to expand...
Click to collapse
I tried to clean. Nothing has changed. Thank you for help.
colemanuk said:
I managed to buy a new bottom pcb with usb port on ebay for less than £10 when mine burnt out. Does the port smell of burning?
Very easy to change if this is your problem
Click to expand...
Click to collapse
The port doesn't smell of burning. I will order this usb port, maybe it will help. Thank you for help.
colemanuk said:
I managed to buy a new bottom pcb with usb port on ebay for less than £10 when mine burnt out. Does the port smell of burning?
Very easy to change if this is your problem
Click to expand...
Click to collapse
Today I changed usb port and unfortunately I have still problem with charging. I will try to change battery
How long are you using your phone?
If it's more than a year and a half~, i would recommend you to buy a new battery.
A lot of people having battery related issues in the last few months including myself and for me replacing the battery did the trick.
SN22 said:
How long are you using your phone?
If it's more than a year and a half~, i would recommend you to buy a new battery.
A lot of people having battery related issues in the last few months including myself and for me replacing the battery did the trick.
Click to expand...
Click to collapse
Before I changed the battery the phone stopped responding to the charger, also it wasn't visible in the computer, only in fastboot, I changed the battery but unfortunately i dont solve the problem
Hi! This just happened to me as well after changing the battery to a new one (Nohon). It only charges in Fastboot or Recovery mode. Even after factory reset and rom reinstalled. Anyone found a solution for this?
Edit: it does charge in normal mode but on slow chargers, no qc3...
I had the same problem, I'm suspecting something in Lineage 15 or some new firmware was causing it.
Unfortunately after i roll back it did not solve the issue.
I have replaced battery but it does not solve the problem, QC adapters just do not work.
The odd thing is that a low quality cable on QC adapters or non QC adapters will have no problem.
And somehow trying to block off the data pin does not work as well.
I've rolled back to Lineage 14 but it sort of "fake" charge, percentage goes up really fast but in reality it barely charged.
EDIT: seems like some of the oreo firmware was causing it, i have downgraded back to 8.4.19 with lineage 14.1
Hi guys
I have this problem a few days , plug charger and very slow charging , sometimes stop charging ! Reset factory not changing (org miui my rom and 9.6.2 version)
I can downgrade to witch rom of android 7 without break of antirollback ?
So my note 9 (snapdragon) is never using fast charging and even if i manage to get it to give me fast charging it gives 1 hour 39 minutes to charge and takes 3 hours, when i charge by cable charging with disabling the fast charging setting it charges in 2 hours 10 minutes while it is cable charging not giving me fast, with the setting enabled it charges in 1 hour 59 minutes.
One side of the type-c never gives fast charging and the other side writes fast charging for 4-5 seconds then switch to cable charging and rarely doesn't switch but the charging time is 3 hours as i mentioned.
I tried everything possible other than trying to flash another software it is with the stock but unlocked.
I cleaned the socket, used 10 different chargers with different cables, wiped cache and tried safe mode and more.
Sorry for making it a long post but this problem is driving me crazy and i want to know can it be software issue not hardware because the phone is used for 2 months and the socket can't be cleaner, and if i flash the stock rom again will it be locked by T-mobile and i would need to unlock it again?
Thanks alot.
First of all, try to change the cable that 98% of the time is the problem when having these types of issues . Then consider the fact that the battery's temp influences the time needed for charging so if it's hot, software will decrease power in charging so that will give a longer time to charge. Even using the phone while charging or leaving apps in background will extend time for charging.
I have posted this so many times.
Samsung uses cheap USBc connectors that short out. Once you lose FC the only way to get it back is so get a new USBc installed by Samsung or a third party. This happened to me about 4 months after I got phone. I never fixed but I will never buy Sammy again. Its not your cables, its not the power cube, its the connector on the actual phone.
TokedUp said:
I have posted this so many times.
Samsung uses cheap USBc connectors that short out. Once you lose FC the only way to get it back is so get a new USBc installed by Samsung or a third party. This happened to me about 4 months after I got phone. I never fixed but I will never buy Sammy again. Its not your cables, its not the power cube, its the connector on the actual phone.
Click to expand...
Click to collapse
In every case, better Sammy's phone USB c connector then iPhones phone lightning connector because after a year you can't even charge the phone at all for having intermittent false contacts when you plug in the cable for the phones connector going bad....
TokedUp said:
I have posted this so many times.
Samsung uses cheap USBc connectors that short out. Once you lose FC the only way to get it back is so get a new USBc installed by Samsung or a third party. This happened to me about 4 months after I got phone. I never fixed but I will never buy Sammy again. Its not your cables, its not the power cube, its the connector on the actual phone.
Click to expand...
Click to collapse
It's possible the the USB C connection is faulty, it's also possible it's a faulty charger cable or even a faulty charger .
Eliminate one by one, buy a good USB C cable to check if that cures the problem, it often does.
Whilst as Tokedup says it may be the usb socket in the phone as according to his post he didn't fix the problem it's not possible to conclusively determine the cause.
It's unlikely to be caused by software, but high ambient or high battery temperature will lead to charge rate reduction
Maybe try an app like accubattery, this will show the charge rate in mA.
With a genuine charger and cable fast charge will reach a maximum of 2800mA
https://play.google.com/store/apps/details?id=com.digibites.accubattery
joedellosso69 said:
First of all, try to change the cable that 98% of the time is the problem when having these types of issues . Then consider the fact that the battery's temp influences the time needed for charging so if it's hot, software will decrease power in charging so that will give a longer time to charge. Even using the phone while charging or leaving apps in background will extend time for charging.
Click to expand...
Click to collapse
Well i tried everything you said with no success.
The problem is the phone isn't fast charging at all.
I believe it's the phone socket actually.
Thanks anyways
TokedUp said:
I have posted this so many times.
Samsung uses cheap USBc connectors that short out. Once you lose FC the only way to get it back is so get a new USBc installed by Samsung or a third party. This happened to me about 4 months after I got phone. I never fixed but I will never buy Sammy again. Its not your cables, its not the power cube, its the connector on the actual phone.
Click to expand...
Click to collapse
I think you are right but i didn't want to believe it because i am not going to change it and risk opening my phone i can try and live with that.
Thanks
paul_59 said:
It's possible the the USB C connection is faulty, it's also possible it's a faulty charger cable or even a faulty charger .
Eliminate one by one, buy a good USB C cable to check if that cures the problem, it often does.
Whilst as Tokedup says it may be the usb socket in the phone as according to his post he didn't fix the problem it's not possible to conclusively determine the cause.
It's unlikely to be caused by software, but high ambient or high battery temperature will lead to charge rate reduction
Maybe try an app like accubattery, this will show the charge rate in mA.
With a genuine charger and cable fast charge will reach a maximum of 2800mA
https://play.google.com/store/apps/details?id=com.digibites.accubattery
Click to expand...
Click to collapse
I already tried alot of cables and chargers so i am sure it's not one of them and now i am nearly certain it's the socket since you said it's unlikely to be a software issue, but i really wanted to know what could've caused it because i am sure i didn't do anything wrong.
I have been monitoring accubattery for a month now everytime i charge the phone. The mA is always between 800-1200mA and the phone takes nearly 2 hours to charge.
Thanks alot mate
just to be sure that it is not software related, remove all the battery optimization related 3rd party apps. clear cache and test the phone with stock usb cable and charger that came with the phone. what i had experience is that my note 9 SM-960F is sencitive to charger. if i use a third party fast charger or cable, it give me some sort of trouble like overheating or slow charging. so make sure you are using stock charger and cable that came with phone.
Munawar Mehmood said:
just to be sure that it is not software related, remove all the battery optimization related 3rd party apps. clear cache and test the phone with stock usb cable and charger that came with the phone. what i had experience is that my note 9 SM-960F is sencitive to charger. if i use a third party fast charger or cable, it give me some sort of trouble like overheating or slow charging. so make sure you are using stock charger and cable that came with phone.
Click to expand...
Click to collapse
I wiped data factory reset and cleared cache and tried safe mode so i don't think it's any of that.
the last try will be flashing the stock rom again but i am hesitant because i am afraid the phone will be locked again by T-mobile and i won't be able to unlock it
Thanks
Why not get a Samsung wireless quick-charger and try it?
A wireless charger will not be faster than cable charge but I would get one so you don't wear out that port to where it doesn't interface with a computer if needed in the future. Btw all my new phones thats the first thing I turn off is fast charging it degrades battery more over time.
TokedUp said:
I have posted this so many times.
Samsung uses cheap USBc connectors that short out. Once you lose FC the only way to get it back is so get a new USBc installed by Samsung or a third party. This happened to me about 4 months after I got phone. I never fixed but I will never buy Sammy again. Its not your cables, its not the power cube, its the connector on the actual phone.
Click to expand...
Click to collapse
When I purchased my note 9 I did a post somewhere where I said the weakest link in this phone is the Charging port. And so right from the first week I got a wireless charging pad.
Also during the rainy season I keeps saying there is moisture in the port. Basiclly god help you if you live in a place with high humidity.
Like you this is the last Samsung Note I will buy in this life. My Audio packed up after the update. I suspect the over heating caused this. And their support is outsourced in India so they don't give a hoot about your issues.
To the OP.
Try a wireless charger if that fast charges Then you know its a port issue. If that also does not fast charge then its a chip / board issue.
I predict all note 9 users are going to see more and more problems as the over heating causes components to start to fail.
You can get a new USB port with flex cable for like 4$ on ali express go for it.