Develop Bugs

Wireless charger question.

Hi,
So, I'm one of the 'few' users which the USB connector on my nexus became loose to the point where doesn't charge anymore. One of the connectors inside broke (shorter then the others), I tried to fix another connector (successfully) but I can't do much about the broken one.
With this I'm left with 3 alternatives.
Send to RMA, logical, but would take at least two months since I'd have to send it to UK (was bought there) and I don't wanna be that long without it.
Order a USB connector and mount it myself. I'm actually considering this... But moving on...
Order a wireless charger, this seems the most fast option to get it charging. Now choosing this option leaves me with some questions. Considering that the official wireless charger is way more expensive than those QI ones, I checked the specifications and seems like the mA/output between QI chargers and official wireless is the same, so, do they take the same amount of time charging? Will I have any issues with another brand (considering it should work on nexus) ? Any big pratical differences between official / other brands if the technical specifications are the same?
Someone care to shed a light on this matter?
Thank you so much in advance
Sent from my Nexus 5 using XDA Premium 4 mobile app

MidnightDevil said:
Hi,
So, I'm one of the 'few' users which the USB connector on my nexus became loose to the point where doesn't charge anymore. One of the connectors inside broke (shorter then the others), I tried to fix another connector (successfully) but I can't do much about the broken one.
With this I'm left with 3 alternatives.
Send to RMA, logical, but would take at least two months since I'd have to send it to UK (was bought there) and I don't wanna be that long without it.
Order a USB connector and mount it myself. I'm actually considering this... But moving on...
Order a wireless charger, this seems the most fast option to get it charging. Now choosing this option leaves me with some questions. Considering that the official wireless charger is way more expensive than those QI ones, I checked the specifications and seems like the mA/output between QI chargers and official wireless is the same, so, do they take the same amount of time charging? Will I have any issues with another brand (considering it should work on nexus) ? Any big pratical differences between official / other brands if the technical specifications are the same?
Someone care to shed a light on this matter?
Thank you so much in advance
Sent from my Nexus 5 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
In my experience with third party chargers i only found it to be a bit less well built and slightly more heat
But thats it
In my opinion you should go for it

Because my N7 is also used in my truck for audio, I have a wireless eBay charger in the truck mount and another on my nightstand by the bed. They work great and supposed to.

Thanks guys

Wireless Charging Woes

Ok, so im using the Spigen Neo Hybrid case, and when i use wireless charging, it may work 30 seconds, or 10 minutes, but it always stops. What happens is i place it on the charger and it indicates its charging. Then, within a short time period, the light on the charger starts flashing to indicate charging isnt working properly, and the screen comes on and says wireless charging paused.
I have 3 different Samsung chargers, a Nokia charger and several Powerbot chargers. One of the Samsung chargers is the newest (not fast) chargers. I take the case off and it seems to be fine. Anyone familiar with this case knows its not thick by any means. Also, i have 2 GS6s in the house both using Neo Hybrids and they charge just fine. Ive adjusted positioning dozens of times but i know from experience that most devices dont require an EXACT placement.
I went to Best Buy, where i purchased it, and this is where it gets odd. They placed it on their display charger in the Samsung section and it charged for 10 minutes no problem before they told me they couldnt duplicate the issue so they wont replace it. I brought it home and the damn thing charged to full charge no issue. The next day when i placed it back on the charging pad, it starts cutting out again.
All my chargers have been tried over USB, and yes, with multiple wall plugs. My first thought was not enough power over USB but clearly thats not the case.
Any ideas from anyone would be great.

I don't have the issue with the old wireless chargers it seems. I think it is just the new ones that were given out that I have the issue with.
Sent from my SAMSUNG-SM-N920A using XDA Free mobile app

I've finally fixed my issue with the original samsung charger and generic from ebay, I turned on day dream and it works now without disconnection.

A lot of people are having the same problem and so was I.
Grab your phones charger and base and use that.
I think the long cord that comes with the wireless charger is causing the issue.

I'm using an old knock off wireless charger and no case yet, but it seems to be working fine. Once the defender case comes in, we'll see if it is still functional

I haven't had any issues with my Samsung wireless charger. I'm using the original hardware that came with it. I'm also using the Neo hybrid case. What is your model number? Mine is EP-PG920A. When I was at best buy they said they had two different versions of the wireless charger. Unfortunately bestbuy was sold out so I bought mine at ATT. And I don't have daydream enabled.
Sent from my SAMSUNG-SM-N920A using XDA Free mobile app

Who has tried wireless charging, and is it still working?

There are numerous threads on people's experience with wireless charging, mostly involving the stickers to use, meltdowns with heat, etc. I would like to compile people's experiences.
If you do have experience, please comment on:
1. Did you ever get it to work to your satisfaction? If not, what was not satisfactory about it?
2. How long did it last? Or how long have you had it working?
3. What qi charger do/did you use?
4. If it broke down, what happened and did you ever get it working again?
5. What model of G4 and/or carrier do you have?
Also, there's a quick poll associated in this thread.

Working sense late June. Using this one but I got it before the 2.0 upgrade. NeWisdom https://www.amazon.com/dp/B00YU08SOG/ref=cm_sw_r_other_awd_fxViwbN05MBDA

scottjal said:
Working sense late June. Using this one but I got it before the 2.0 upgrade. NeWisdom https://www.amazon.com/dp/B00YU08SOG/ref=cm_sw_r_other_awd_fxViwbN05MBDA
Click to expand...
Click to collapse
What qi charger do you use?
(added to the original post just now)

waylo said:
What qi charger do you use?
(added to the original post just now)
Click to expand...
Click to collapse
This one, it was basically the cheapest one I could find June 2014. Once the phone is charged you can see the light cycle on and off just maintaining 100%. Works fine for a bunch of devices and I don't notice if it's slow as it has 8 hours to charge when I sleep.
CHOE UPGRADED Qi Wireless Charger Charging Pad https://www.amazon.com/dp/B00DRBFMZM/ref=cm_sw_r_other_awd_WNViwbW7EJTDK

I purchased this plastic replacement back that came with a qi sticker. I used it mainly with this CHOE 3 coil charger, but also tried it on this Yootech one, and this one as well. On all three chargers, the phone got super hot while charging. So much so that at one point my phone even froze up and I had to pull the battery. It may have been the qi sticker that came with the back I bought, but I stopped wireless charging after about a week, because I just didn't like how hot it got.
I'm thinking of picking up another qi sticker, but just can't decide which one is the best.

I'm using the official LG qi charger and the quickcircle cover with qi built in. All working but i find plugging in faster so basically just end up using that instead..

paqmanbiker said:
I purchased this plastic replacement back that came with a qi sticker. I used it mainly with this CHOE 3 coil charger, but also tried it on this Yootech one, and this one as well. On all three chargers, the phone got super hot while charging. So much so that at one point my phone even froze up and I had to pull the battery. It may have been the qi sticker that came with the back I bought, but I stopped wireless charging after about a week, because I just didn't like how hot it got.
I'm thinking of picking up another qi sticker, but just can't decide which one is the best.
Click to expand...
Click to collapse
I've found that exact placement on the charger can affect the charging temperature dramatically. I think if the sticker is a little ways off from the center of the qi charger (wherever that is, not sure how that is determined on the 3 coil), it heats up a lot more.

waylo said:
I've found that exact placement on the charger can affect the charging temperature dramatically. I think if the sticker is a little ways off from the center of the qi charger (wherever that is, not sure how that is determined on the 3 coil), it heats up a lot more.
Click to expand...
Click to collapse
Yeah I tried my best to make sure it was right in the center, but it seems no matter where I placed it it would get hot. Plus what's the benefit of having a 3 coil charger if I have to place it in exactly the right spot? I think there is definitely something wrong with the qi sticker I'm using. If not, many others would be having similar issues. I'm using fairly widely used chargers.
Sent from my LG-H811 using Tapatalk

I never felt comfortable using the Qi charging after hearing the noise my phone made when I set it on the charger. I have multiple brands of chargers and all produce the same noise from the phone's speakers (youtube link below). I've tried with cases and without cases on all my chargers.
Here are my qi chargers:
1. Itian Qi Standard Wireless Charger
2. Axiong Qi Wireless 3-Coils Stand Charging Pad Stand Dock Wireless Charger for Qi Phones
3. Tmvel T2 Wireless Charger Charging Mount Cradle Stand for all Qi Phones, with Wide Charging Area for LG G3, Nexus 5, Nexus 4,Nokia Lumia 920, MOTO Dro
4. Tmvel Qi Wireless Car Charger Dock for Qi-Enabled Devices
5. Nillkin Energy Stone For Nokia Lumia 920 1520 Lg Google Nexus 4 5 LG G2 HTC 8x DNA Simple Fashion Wireless Qi Power Charger Charging Pad + Leevin® NF
6. PowerBot® PB1020 Qi Enabled Wireless Charging Pad Station for All Qi Standard Compatible Devices Including Samsung, iPhone, Nokia, Google, Nexus, LG,
7. Ruix Wireless Charger -Qi Enabled Charger - White
https://www.youtube.com/watch?v=HV4rHIBdM5M

So an impressive 50% of folks on the poll at this time have had it crap out.
Wonder if the V10 will have this issue too? I'd consider switching to that, but the G4 is big enough already for me.

1. Works as expected
2. Have it for a week now
3. PowerBot
4. n/a
I'm using the official LG G4 CFR-100 cover btw...

After reading about wireless charging, maybe it's the reason why the feature was removed from phones released in my country. We got a dual sim variant where wireless charging was removed totally.

prinzhernan said:
After reading about wireless charging, maybe it's the reason why the feature was removed from phones released in my country. We got a dual sim variant where wireless charging was removed totally.
Click to expand...
Click to collapse
Wireless charging was removed from dual sims because the circuitry for wireless charging is replaced by that of the second sim.

waylo said:
There are numerous threads on people's experience with wireless charging, mostly involving the stickers to use, meltdowns with heat, etc. I would like to compile people's experiences.
If you do have experience, please comment on:
1. Did you ever get it to work to your satisfaction? If not, what was not satisfactory about it?
2. How long did it last? Or how long have you had it working?
3. What qi charger do/did you use?
4. If it broke down, what happened and did you ever get it working again?
Also, there's a quick poll associated in this thread.
Click to expand...
Click to collapse
1. Yes, it worked perfectly.
2. I only use the wireless charger at work and I started noticing issues after the 12th work day. Today is the 13th day and it is no longer working at all. When I power off the device and stick it on the charger, the charging light briefly indicates it's charging and powers the device on and then goes back to the idle state.
3. Using this back: http://www.amazon.com/gp/product/B00ZEY13SU?psc=1&redirect=true&ref_=oh_aui_search_detailpage and this charger: http://www.amazon.com/gp/product/B00LFVPRMO?psc=1&redirect=true&ref_=oh_aui_search_detailpage
4. Came to XDA see if it's common and it looks like it is I'll try to see what happens after contacting LG support. I doubt there's much T-Mobile can do if I don't have any type of insurance or anything with them.

mypantsaretorn said:
1. Yes, it worked perfectly.
2. I only use the wireless charger at work and I started noticing issues after the 12th work day. Today is the 13th day and it is no longer working at all. When I power off the device and stick it on the charger, the charging light briefly indicates it's charging and powers the device on and then goes back to the idle state.
3. Using this back: http://www.amazon.com/gp/product/B00ZEY13SU?psc=1&redirect=true&ref_=oh_aui_search_detailpage and this charger: http://www.amazon.com/gp/product/B00LFVPRMO?psc=1&redirect=true&ref_=oh_aui_search_detailpage
4. Came to XDA see if it's common and it looks like it is I'll try to see what happens after contacting LG support. I doubt there's much T-Mobile can do if I don't have any type of insurance or anything with them.
Click to expand...
Click to collapse
The T-Mobile store can put in for a warranty exchange, if you initially bought it with them. But then you get a refurb. It's $20. Alternatively, you could send it in for a factory warranty, but it'll be out for several weeks. And then after you get it back, the wireless charging will break down after a week or two. Ridiculous, right?
I think it's endemic with our H811 model. I wish this could be as big as Antennaegate, forcing LG to admit their poor design+engineering, but there aren't enough users to raise a stir.

waylo said:
The T-Mobile store can put in for a warranty exchange, if you initially bought it with them. But then you get a refurb. It's $20. Alternatively, you could send it in for a factory warranty, but it'll be out for several weeks. And then after you get it back, the wireless charging will break down after a week or two. Ridiculous, right?
I think it's endemic with our H811 model. I wish this could be as big as Antennaegate, forcing LG to admit their poor design+engineering, but there aren't enough users to raise a stir.
Click to expand...
Click to collapse
I just had an online chat session with LG Support and since they only officially brand their Qi case for Verizon phones they are telling me that the T-Mobile model is not compatible with wireless charging and there's nothing they can do. I got this phone off CL so going to T-Mobile is going to be difficult. I purchased the LG G4 back on release day day but returned it so I was going to use that receipt with LG Support but it looks like that's a dead end.
Another question you should ask in this thread is which model people are using since this is a general G4 forum and not carrier specific. It does look like this happens with Verizon phones too though: http://forum.xda-developers.com/verizon-g4/help/wireless-charging-stopped-t3226231
Thankfully the battery life is good enough on this phone where I can probably live without the wireless charging at work. To be honest It was more of a must have when I had the S6 since there was no way I could make it through the workday without leaving it on the charger.

Wow, really? The function that works (at least initially) because all the hardware is there, on T-Mob, is "not supported?" That sounds like LG support has their heads up their butts, just like the QA department on the wifi charging.
I'll add the question of what version G4 do you have on the questionnaire. Can't edit the poll anymore though I wish I could.

1. Locked up during the night, multiple times a week.
2. Randomly started working perfectly for 3 months. Replaced phone. Worked for about 1.5 months. Now stops charging and locks up during the night again.
3. Nokia puck + Samsung + several chinese ebay units
4. Absolutely no idea why it magically fixed itself and now magically broken.
5. Verizon G4

There are numerous threads on people's experience with wireless charging, mostly involving the stickers to use, meltdowns with heat, etc. I would like to compile people's experiences.
If you do have experience, please comment on:
1. Did you ever get it to work to your satisfaction? If not, what was not satisfactory about it?
Yes, but not for more than a couple weeks at a time.
2. How long did it last? Or how long have you had it working?
About 2 weeks, sent in for RMA, came back not fixed, sent back, worked for a little over a week, stopped today.
3. What qi charger do/did you use?
LG Quick Circle case purchased from Verizon, 2 tylt vus, one samsung puck.
4. If it broke down, what happened and did you ever get it working again?
No idea what caused it to stop working -- today it stopped somewhere between work and home.
First time, mailing it in twice helped.
5. What model of G4 and/or carrier do you have?
Verizon
Also, there's a quick poll associated in this thread.

Using a Yootech sticker with a Yootech puck. Both work well. I originally had a sticker from the Fone company...the colorful one in blue and green, iirc. The wireless charging worked but the NFC was unusable with it. (not that I myself use nfc

Wireless Charging LG G7

Background :
One of the reasons of getting the LG G7 was placing it on and off (for top ups). I did not dwell (yet) into getting a separate wireless charging pad (and I haven't really been charging it much that ways yet either). I stumbled upon my lost Samsung Wireless charging pad which I used extensively on the S series earlier (unable to post link as I am a new user). Please google Samsung EP-PG920I Wireless Charger.
Questions and Concerns :
I once started charging it wireless from 3% or so and observed that suddenly it would stop charging on its own. It would not start charging again until it was lifted and placed again and again in some time it would stop charging. I thought it might be a one-off issue and tried to do the same the other day and it did the exact same thing all over again the next time as well. I'm assuming it has something to do with the charger pad. I did read somewhere that the phone has its cut off if it reaches a particular temp while charging and wondering if that is what is happening ?
Has anyone here faced the same issue ?
Is anyone here using the wireless charging option extensively and have no issues whatsoever ? If yes, please specific make / brand / setup in use for charging. Also please specify if the phone has been successfully charged say more than 50% on wireless.
Looking forward to discussions on the same.

I don't use wireless charging.. But from what your describing, it might just be time, to purchase a newer one.. I would hate to think, that the Samsung works only with Samsung.. But nothing would surprise me these days..

Bump!
No one using this feature ?

hanzohattori87700 said:
Background :
One of the reasons of getting the LG G7 was placing it on and off (for top ups). I did not dwell (yet) into getting a separate wireless charging pad (and I haven't really been charging it much that ways yet either). I stumbled upon my lost Samsung Wireless charging pad which I used extensively on the S series earlier (unable to post link as I am a new user). Please google Samsung EP-PG920I Wireless Charger.
Questions and Concerns :
I once started charging it wireless from 3% or so and observed that suddenly it would stop charging on its own. It would not start charging again until it was lifted and placed again and again in some time it would stop charging. I thought it might be a one-off issue and tried to do the same the other day and it did the exact same thing all over again the next time as well. I'm assuming it has something to do with the charger pad. I did read somewhere that the phone has its cut off if it reaches a particular temp while charging and wondering if that is what is happening ?
Has anyone here faced the same issue ?
Is anyone here using the wireless charging option extensively and have no issues whatsoever ? If yes, please specific make / brand / setup in use for charging. Also please specify if the phone has been successfully charged say more than 50% on wireless.
Looking forward to discussions on the same.
Click to expand...
Click to collapse
I don't have any issues with it. Are you sure that the power brick is providing enough power. It should provide at least 5V 2amps in order to work. I use the stock brick to power my wireless charger. If it's not that go to a retail store and find a wireless charger to test on.

LameMonster82 said:
I don't have any issues with it. Are you sure that the power brick is providing enough power. It should provide at least 5V 2amps in order to work. I use the stock brick to power my wireless charger. If it's not that go to a retail store and find a wireless charger to test on.
Click to expand...
Click to collapse
Appreciate your response. I used my stock g7 adaptor on wireless samsung charging pad. So it is basically pumping out as much as required. Not sure if it is the charging pad which is at fault for not able to handle it maybe ? (Which actually is not its fault?). Pls post details of what setup you are using without any issues. Unfortunately, I havent seen any big retail (or small) advertising or even having wireless charging pads on display for me to walk in and check this out. In India this concept has not caught up and not many are interested in this feature. Many might have the option but still not use the feature.

Your EP-PG920I doesn't support Qualcomm QI charging at all. It doesn't support even new Samsung devices like S8 or S9, it supports S6 and S7 only.
Samsung supported at that time only WPC 1.1 standard and no Qualcomm QI. That's why EP-PG920I isn't full compatible with your LG 7.
I have no problem with QI charging. Use any 15W QI certified fast wireless charger like https://www.amazon.com/dp/B07H783993/ref=cm_sw_r_cp_apa_i_ZgejCbRN366QD

Montechristo said:
Your EP-PG920I doesn't support Qualcomm QI charging at all. It doesn't support even new Samsung devices like S8 or S9, it supports S6 and S7 only.
Samsung supported at that time only WPC 1.1 standard and no Qualcomm QI. That's why EP-PG920I isn't full compatible with your LG 7.
I have no problem with QI charging. Use any 15W QI certified fast wireless charger like https://www.amazon.com/dp/B07H783993/ref=cm_sw_r_cp_apa_i_ZgejCbRN366QD
Click to expand...
Click to collapse
Much appreciated with the explanation. I guess I have a better understanding of this now. So while it does actually charge it is not the recommended way and the issue faced is because it ultimately breaks midway as not fully supported cause of the limitation. I will give one of the better chargers and the QI certified fast chargers a go.

I use original Samsung Fast wireless charger, model is EP-NG930BBEGWW. Its connected with original Samsung S7 fast charger. This wireless charger work without any problems with S7 Edge, S6, S9+, and G7. In specs: FAST CHARGE (Compatible with Galaxy Note8, S8, S8+, S7, S7 Edge, Note 5, S6 Edge+) / Qi (Compatible with Galaxy S6, S6 Edge and Qi certified devices). Only "problem" with G7 is it charging slow. Very slow - from 5 to 100% maybe 3+ hours. But this is no meaning for me, I charge my phone at night. I read G7 doesn't support fast wireless charging. Here in other thread people said support fast wireless charging, but it isn't.
Sent from my LM-G710

degman said:
I use original Samsung Fast wireless charger, model is EP-NG930BBEGWW. Its connected with original Samsung S7 fast charger. This wireless charger work without any problems with S7 Edge, S6, S9+, and G7. In specs: FAST CHARGE (Compatible with Galaxy Note8, S8, S8+, S7, S7 Edge, Note 5, S6 Edge+) / Qi (Compatible with Galaxy S6, S6 Edge and Qi certified devices). Only "problem" with G7 is it charging slow. Very slow - from 5 to 100% maybe 3+ hours. But this is no meaning for me, I charge my phone at night. I read G7 doesn't support fast wireless charging. Here in other thread people said support fast wireless charging, but it isn't.
Sent from my LM-G710
Click to expand...
Click to collapse
Just like the case in mine it may be working but not completely. From the specs I see it has a max output of 1000mA that may be the reason for slow charge (i guess)

Yes charging slow but I don't have your problems with charging. Stop or anything else you write. Maybe you have to get other wireless charging pad.
Sent from my LM-G710

Fast Wireless Charging Issue

So when I put my phone on my charger it says "fast wireless charging" then after about 4 seconds it just automatically changes to REGULAR charging and the time DOUBLES! I have been using this charger cradle from ANKER for a three years so I thought maybe it's the charger. But no. I used a S9 which also has fast wireless charge. It does not do what the note 20u does at all. I've rebooted mult times and turned off and on fast Wireless charging and still the same thing keeps happening. It should be noted this started happening after an update to N986USQU1ATI5 / N986UOYN1ATI5 / N986USQU1ATI5
Has anyone experienced this!??

I have a similar problem that started after the upgrade, and only on 1 charger (Aukey). It starts as fast charging, then after about 10-20 seconds, stops altogether for less than a second, then starts fast charging again. If the screen is on, the charging sound goes off every 15 seconds or so. It's only the Aukey charger. Strange.
I checked again, and it does also go to standard charging after stopping. Also, I changed power the power supply, and it still does the same thing.

I had the same issues several times.

Wow. I wonder if Samsung did something shady like remove fast Wireless charge or made it so fast Wireless charge only works with their chargers?? This seems VERY suspect that this is happening to other people. Have any of you reported this to Samsung? I'm about to get in touch with their support and see what they say

i have the same issue with baseus 120w charger....charges with super fast charging for couple of minutes and then goes back to normal fast charging.

Same here. Wish someone had a fix

Same here. Pauses charging every 5 to 10 seconds and actually never charges. Only works on the Samsung pad now.

For what it's worth, I have a spigen wireless car charger and it does fast charge.

Like I said before, it's only SOME chargers that won't work. It was definitely after the update, before the update, all my chargers worked. I went on the Samsung Members app, and people there are having the same problem, but no solutions.

s20 wireless charging pauses since the sept update for me, too. rebooting, clearing cache, force reboot all fail to clear this problem. makes ya wonder how much testing is done with the updates samsung rolls out.

Same here after the latest upgraded.

I just received a generic 15w wireless charger stand from Aliexpress and noticed this issue too.
My older S9+ fast charges on it fine, while my new Note 20 Ultra only slow charges (~1200 milliamp vs ~700 milliamp input according to the Ampere app... This is with my Note 20's charger brick and cable.
Seems like Samsung are intentionally trying to lock out third party chargers.

Same here with the I Ottie I tap 2.
Was working before September update, Have tested with Samsung S10 plus and s9. On both, fast charging is working.
Any workaround yet, any one contacted Samsung ?

Quick update, contacted Samsung support. Fat lot of good that did.
Wanted me to take it in to a service centre. I reiterated it wasn't a hardware problem, it was software.
Anyway she stated to send a bug report through to Samsung with the description.
- Settings
- Information about the phone
- Contact us
- Report error
Next, enter a detailed description of the anomaly and attach the system log data. You will need to check the item at the bottom "Send system log data"

I have the same problem with my CHOETECH 15W charger. I guess we need to wait to next update from Samsung

webnorka said:
I have the same problem with my CHOETECH 15W charger. I guess we need to wait to next update from Samsung
Click to expand...
Click to collapse
Still no fix, Boycott Samsung.
Sent from my SM-N986B using Tapatalk

I have this issue also. Not enough people *****ing about it to get it fixed so far.

I'm trying my best.
https://us.community.samsung.com/t5/Galaxy-S20/Problem-with-Galaxy-s20-ultra-wireless-charging/m-p/1...
https://forum.xda-developers.com/galaxy-note-20-ultra/help/fast-wireless-charging-issue-t4168051/pag...
https://us.community.samsung.com/t5/Galaxy-S20/Wireless-Charging-Stopped-After-Update/td-p/1463192
https://us.community.samsung.com/t5/Note20/fast-wireless-charging-problems/m-p/1467042#M8603

I have all type of fast chargers (from 18w to 65w) at home/office... old/ new/ or third party and mostly they can fast charge on my S20+. I found this "slow down charging" issue occurs when it's on a wore USB-C cable/ or cheap third party cable (especially those 1 to 2 or 1 to 3 cable).

For what it is worth, I have a third party cheap charger (seneo) that used to flop flop between fast and regular wireless charging however, I swapped out the power cord with an older S10 phone cord and a Samsung fast charger power adapter and now I have fast charging.