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Using different chargers question please

I have numerous chargers at home all of which have charged my evo, gs2, Nexus 7, etc.
Can these be used interchangeable in the Note 2 without harming the charging process?
Thanks

As long as the Voltage is the same (5V) there is no Problem. But you should have a charger at 2 Amper for optimal charging speed.

I just tried charging mine with the normal microUSB charger I use for every other phone I have had and it took 7.5 hours to charge from 5%-62%. I used the stock charger that was in the box and it charged it in 3.5-4 hours no problem. Seems like the charger in the box charges faster.

reading this thread made me curious, my NOTE II should arrive in about a week, I can't tell for myself yet, what is the A (amps) specification mentioned on the original charger?
as i come from HTC, my current chargers go up to 1 A current. witch is the double A a standard USB port will give unless crossover'd .
thanks in advance!
----
in the wiki thread i found the answer, the supplied charger delivers 5 V 2 A output to the device.

WendigoNL said:
what is the A (amps) specification mentioned on the original charger?
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Click to collapse
2A! Same as the Tab 10.1 charger.
Filling a 3100mAh battery requires some grunt.

i think even the usb cable makes a difference..
when i use the stock usb cable with the stock charger ..my s3 would charge up comparatively faster than with the other usb cable connected to the same stock charger.:rolleyes

max.android said:
i think even the usb cable makes a difference..
Click to expand...
Click to collapse
It certainly does! :good:
All electrical cables have some resistance. Very low (but not zero) for quality cables, sometimes quite noticeable for thin and cheap offerings.
From Ohm's Law we know that voltage drop will be proportional to current. A cable with a resistance of just half an ohm will loose about 0.5% at 50mA. That's pretty much nothing. However, at 2000mA the loss reaches 20%.

dude use any charger, just don't use LG charger **** !!!!!

You must use the 5volt 2amp charger and cable provided or a replacement with the same output or youll either be waiting for ever for it to charge or do some damage.
I tryed using my note 1 charger rated at 1amp and guess what? It took about twice as long to charge.
Sent from my GT-N7100 using xda app-developers app

Some of my old 1 Amp chargers aren't happy at all, and will often decide to stop charging randomly.
I though it was something weird with my phone, but after switching chargers it never happened again.
- Frank

USA official charger
This are the images of the official USA charger that will comes when they release the device in USA
And yes its a 2.0A charger, so the SIII charger isn't appropriate for NoteII.
this is the kind of charger used in Canada, USA, and Latin America, i bought this NoteII in Mexico from an authorized Samsung provider, of course factory unlocked 710usd, like 10,900mxn.

Has anyone tried a 3A charger? Just wondering if this would speed up charging even more than the standard 2A charger.

mcdill the pig said:
Has anyone tried a 3A charger? Just wondering if this would speed up charging even more than the standard 2A charger.
Click to expand...
Click to collapse
No, it won't speed it up. It's what the device takes from a charger, and not what a charger can potentially supply. If the device's charging circuit is spec'd for up to 2A current, that's what it will suck out of a charger, not more. You can connect a 30A lab power supply, and it will still be the same 2A (or less) input. To speed up the charging process, you need to mod the charging circuit of the device itself.

21w charging

This phone supports 21w charging, but it is only shipped with an 18W charger. (This charger seem to be able to give out 5V, 9 V (2A) and 12V (1.5A).)
Anyone have information on what version of USB-PD the phone supports? And what voltage is used to obtain 21w?
Has anyone got 21W charging working? As not all higher wattage usb-pd charges may support the 21W mode that this phone needs.

Well I can tell you do not use anything above Sony's recommended charging °W because anything above that - even with PD -- the device will intensely heat up.

JB2unique said:
Well I can tell you do not use anything above Sony's recommended charging °W because anything above that - even with PD -- the device will intensely heat up.
Click to expand...
Click to collapse
Sony report 21W charging. So I'm not asking to go above Whats recommended.
I am asking more about the actual charging methodology, as the usb-pd system can be a bit complicated. And even a 45W charger may not correctly 'handshake' at 21w unless it's got the right voltage to offer.

Anyone?
No one has tried using a higher wattage PD charger?

shock-UK said:
Anyone?
No one has tried using a higher wattage PD charger?
Click to expand...
Click to collapse
My Xiaomi 30W 1A1C charger (which supports USB PD 2.0 over the C port I believe) negotiates 7V/3A to hit the 21W.

JB2unique said:
Well I can tell you do not use anything above Sony's recommended charging °W because anything above that - even with PD -- the device will intensely heat up.
Click to expand...
Click to collapse
Winrahr said:
My Xiaomi 30W 1A1C charger (which supports USB PD 2.0 over the C port I believe) negotiates 7V/3A to hit the 21W.
Click to expand...
Click to collapse
Nice. That is an interesting combination. I thought it might do it at higher voltage.
How are you measuring it? I'm thinking of getting a usb measuring display.

shock-UK said:
Nice. That is an interesting combination. I thought it might do it at higher voltage.
How are you measuring it? I'm thinking of getting a usb measuring display.
Click to expand...
Click to collapse
Me too, I thought it'd be doing 12V/1.8A or something but 7V/3A makes sense. Definitely should make sure the cable is quality enough to support 3A. As an aside, the phone charges at 5V/1.5A for all non USB-PD compliant chargers.
I measured with a super cheap USB C meter that I've been sticking into random chargers for curiosity sake. Highly recommended :laugh:

Ok, ordered an Usb pd 3.0 charger today, the Arcanite one. As it also has a PPS option.
Also ordered as usb c power meter.
Let's see if it does the same voltage combination with this charger.

I just looked more into the USB-PD spec and I believe you'd need a PD3.0 compatible charger to hit the 21W since the charger needs to support PPS to hit 7V/3A. Otherwise I'm assuming it would negotiate to 5V/3A or 9V/2A if the charger doesn't have a 7V step.

So got a charger with PPS support (a USB-PD 3.0) an up to 30w charging. An Anker USB c to c cable with 60W support.
And using a satechi voltage / current measuring device.
But something isn't correct. It could be the usb-c voltage measure.
Using the supplied 18W charger, it's displaying 5.27V, 2.78A. that's roughly 15W. ( Picture attached).
Using the new 30W charger, it's displaying 6.44V, 2.77A. that's roughly 18W. ( Picture attached).
Still need to do more testing, not sure why I'm getting these readings. A bit below what I was expecting.

shock-UK said:
So got a charger with PPS support (a USB-PD 3.0) an up to 30w charging. An Anker USB c to c cable with 60W support.
And using a satechi voltage / current measuring device.
But something isn't correct. It could be the usb-c voltage measure.
Using the supplied 18W charger, it's displaying 5.27V, 2.78A. that's roughly 15W. ( Picture attached).
Using the new 30W charger, it's displaying 6.44V, 2.77A. that's roughly 18W. ( Picture attached).
Still need to do more testing, not sure why I'm getting these readings. A bit below what I was expecting.
Click to expand...
Click to collapse
What battery % is your phone at? You also have to remember that the closer the phone is to 100%, the charging speed will slow down.
I have an Anker 30W charger and can charge at speeds of at least 3500 mAh (based on Ampere reading).

The battery was around 35%. Yes you are right once it got over 50% the charging rate does show down a bit.
Also the Ampere app was displaying 3600 or 3500 as the current. But even if we calculate that, that's only about 18W. But that app isn't very good at measuring charging voltage or current.

The charger's specifications are attached below,

Actually, did anybody find a 21W charger compliant with our device??? (I mean really delivering 21W...)
Edit:
I've ordered the Samsung Ultra Fast Charge 25W (ref: EP-TA800XBEGWW)
It is PD 3.0 PPS and delivers 3.3-5.9V at 3A or 3.3-11.0V at 2.25A.
I hope that will work...

nreuge said:
Actually, did anybody find a 21W charger compliant with our device??? (I mean really delivering 21W...)
Edit:
I've ordered the Samsung Ultra Fast Charge 25W (ref: EP-TA800XBEGWW)
It is PD 3.0 PPS and delivers 3.3-5.9V at 3A or 3.3-11.0V at 2.25A.
I hope that will work...
Click to expand...
Click to collapse
I have the Samsung EP-TA800 25W charger from a Samsung Galaxy A71 5G. On low battery with my USB tester, I measured 22W (9V/2.5A) when charging my A71 but only 15W (5.5V/2.7A) when charging my Xperia 1 ii. Were you able to do better with this Samsung charger?
In fact, I have been testing all my PD chargers (about a dozen in total -- I might have a problem!), and none has been able to charge my Xperia 1 ii at more than 18W. That's certainly decent, but it would be nice to get the 21W that the hardware is capable of.

mikew99 said:
I have the Samsung EP-TA800 25W charger from a Samsung Galaxy A71 5G. On low battery with my USB tester, I measured 22W (9V/2.5A) when charging my A71 but only 15W (5.5V/2.7A) when charging my Xperia 1 ii. Were you able to do better with this Samsung charger?
In fact, I have been testing all my PD chargers (about a dozen in total -- I might have a problem!), and none has been able to charge my Xperia 1 ii at more than 18W. That's certainly decent, but it would be nice to get the 21W that the hardware is capable of.
Click to expand...
Click to collapse
I've not finished my tests, answers soon...

mikew99 said:
I have the Samsung EP-TA800 25W charger from a Samsung Galaxy A71 5G. On low battery with my USB tester, I measured 22W (9V/2.5A) when charging my A71 but only 15W (5.5V/2.7A) when charging my Xperia 1 ii. Were you able to do better with this Samsung charger?
In fact, I have been testing all my PD chargers (about a dozen in total -- I might have a problem!), and none has been able to charge my Xperia 1 ii at more than 18W. That's certainly decent, but it would be nice to get the 21W that the hardware is capable of.
Click to expand...
Click to collapse
nreuge said:
I've not finished my tests, answers soon...
Click to expand...
Click to collapse
I've finished my tests.
Both Sony charger 18W and Samsung EP-TA800 25W charger take 37 mn to charge from 20% to 70%. So, the extra power of the EP-TA800 cannot be used by our device, it does not provide the correct electrical intensity...

Finally, I've ordered the ARCANITE Premium PD 3.0 QC4 PPS 30W charger as mentionned above.

I've received the ARCANITE Premium PD 3.0 QC4 PPS 30W charger and I've done the tests.
To charge from 20% to 70%, the Sony charge takes 37 mn and the ARCANITE charger takes 36 mn (tests done in aiplane mode).
The small difference occurs below 50%.

nreuge said:
I've received the ARCANITE Premium PD 3.0 QC4 PPS 30W charger and I've done the tests.
To charge from 20% to 70%, the Sony charge takes 37 mn and the ARCANITE charger takes 36 mn (tests done in aiplane mode).
The small difference occurs below 50%.
Click to expand...
Click to collapse
Thanks for the update. It seems like the ARCANITE might not be delivering the 21W as hoped.
I also ordered yet another charger, the Baseus BS-C915, which allegedly supports PPS. The PPS designation appears in some pictures, but the specifications describe only a range of voltages (3.3-11V @ 3A).
With the Baseus, I get just under 18W (6.6V @ 2.7A) when charging my Xperia 1 ii. It's kind of strange that Sony claims 21W charging but doesn't include a 21W charger and doesn't even provide the specs for one!

Question Can we charge S21U with 40W chargers?

Hi to all,
Can we charge S21U with 40W chargers? They are a lot chargers like Huawei, Xiaomi and etc... with 40W and more.

I believe the answer is yes - or at least probably. Most of those newer chargers are "Smart" in that they only provide the volts and amps that are needed by the device being charged. I may be wrong about that, but I don't think so - I don't think you have anything to worry about.

isko01 said:
Hi to all,
Can we charge S21U with 40W chargers? They are a lot chargers like Huawei, Xiaomi and etc... with 40W and more.
Click to expand...
Click to collapse
Pretty sure you can, I use a 45 watt "smart" charger on my NOTE 20 Ultra without any issue.

You can use any charger that supports PD (power delivery), AFC or QC2.0
Any 45 watt USBC charger out there is going to be PD standard so you'll be fine.
The downside is, it'll still only charge at 25 watts.

I am charging my s21U with an 40w charger, works without problem. not using 40 watts of course, but its working.

The phone, all phones in fact, will ONLY charge at it's highest speed the phone allows itself to receive, the charger doesn't matter, it can be lower or higher than what the device is recommended for. A lower power charger will just take longer to charge the phone, a higher power charger will just not charge at it's full power if the phone won't accept the full power from the charger.
I've been using the 90w charger from my HP Spectre X360 my S20 Ultra since I got it without a single issue, I still get about 2 days of use per charge on that thing, and now I've been using the same laptop charger on the S21 Ultra and it works just fine.
The phone fast charges normally, doesn't get super hot, works just fine, and I only need to keep laptop chargers around the house, it's great haha

I have a 45W USB-C PD port as part of an Anker PowerPort and also the 18W charger that came with my Pixel 5. Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?

Tmel14 said:
Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?
Click to expand...
Click to collapse
That's the charger I've been using w/ S21Ultra (25W from N10+) and I figured out I won't be needing anything bigger then that. Thanks to Samsung 'super fast charging' the 5Ah battery on s21U charges faster then 3.8mA Pixel 4a5G battery(with the same charger). +/- 1 hour and done!

Question Wireless charging paused?

Just got new S21 Ultra and i have my Oneplus Wireless charger Warp 30 its detecting the charge but device always say charging paused and then it starts again and again charging paused its stuck in same loop?
cant i use the oneplus wireless charger in this phone?

nitinvaid said:
Just got new S21 Ultra and i have my Oneplus Wireless charger Warp 30 its detecting the charge but device always say charging paused and then it starts again and again charging paused its stuck in same loop?
cant i use the oneplus wireless charger in this phone?
Click to expand...
Click to collapse
I think OnePlus uses proprietary charging tech. If it's qi certified it will charge the S21U. If not, it won't.
Did you check if your charge supports Qi wireless standard?

enigmaamit said:
I think OnePlus uses proprietary charging tech. If it's qi certified it will charge the S21U. If not, it won't.
Did you check if your charge supports Qi wireless standard?
Click to expand...
Click to collapse
Qi/EPP standard compatibility
yes it does supports its mentioned in there website
OnePlus Warp Charge 30 Wireless Charger | OnePlus Phone Accessories
OnePlus Warp Charge 30 Wireless Charger. Buy now at oneplus.in.
www.oneplus.in

nitinvaid said:
Qi/EPP standard compatibility
yes it does supports its mentioned in there website
OnePlus Warp Charge 30 Wireless Charger | OnePlus Phone Accessories
OnePlus Warp Charge 30 Wireless Charger. Buy now at oneplus.in.
www.oneplus.in
Click to expand...
Click to collapse
Charging pause can be many issue: not compatible charger, too thick case, phone too hot, not in correct position. My cheap 6$ charger charge phone just fine but the current move in a cycle from 1000 to 1600mah.

nitinvaid said:
Qi/EPP standard compatibility
yes it does supports its mentioned in there website
OnePlus Warp Charge 30 Wireless Charger | OnePlus Phone Accessories
OnePlus Warp Charge 30 Wireless Charger. Buy now at oneplus.in.
www.oneplus.in
Click to expand...
Click to collapse
In that case, it should charge the phone at upto 10 Watts. Probable reasons why it stops charging could be high temperature, or a very thick case, or misaligned charging coils. I can't think of anything else that would prevent a Qi certified charger from transferring power to a Qi enabled phone... Have you had a look at the OnePlus forums regarding similar charger issues others might have had?

enigmaamit said:
In that case, it should charge the phone at upto 10 Watts. Probable reasons why it stops charging could be high temperature, or a very thick case, or misaligned charging coils. I can't think of anything else that would prevent a Qi certified charger from transferring power to a Qi enabled phone... Have you had a look at the OnePlus forums regarding similar charger issues others might have had?
Click to expand...
Click to collapse
I tried with case without case..
It was working previously with OnePlus 9 pro..

nitinvaid said:
I tried with case without case..
It was working previously with OnePlus 9 pro..
Click to expand...
Click to collapse
Is the phone temperature going up significantly while charging? Try monitoring that and see if overheating is causing the charging to stop

enigmaamit said:
Is the phone temperature going up significantly while charging? Try monitoring that and see if overheating is causing the charging to stop
Click to expand...
Click to collapse
No it's not ..
Everything is perfect
Just to confirm which app you suggest to monitor the temp

nitinvaid said:
No it's not ..
Everything is perfect
Just to confirm which app you suggest to monitor the temp
Click to expand...
Click to collapse
You can use accubattery, Ampere or Device Info HW to check OS reported battery temp. Accubattery and Ampere will also show you charging current details

nitinvaid said:
No it's not ..
Everything is perfect
Just to confirm which app you suggest to monitor the temp
Click to expand...
Click to collapse
Use cpu float and enable current and temp. Quick and easy

Mrxyzl said:
Use cpu float and enable current and temp. Quick and easy
Click to expand...
Click to collapse
Will check that too just to confirm
Which Samsung wireless charger is good ?
Convertible Wireless Charger (White) | Samsung India
Buy Samsung's new Convertible Wireless Charging Pad/Stand (White) with Fast Wireless Charging, Compatible with Qi-certified devices & more including price & Specs.
www.samsung.com
Or
Trio Pad Wireless Charger (Black) - Price & Specs | Samsung India
Buy Trio Pad Wireless Charger (Black) online. Explore all features like 3-in-1 Wireless Charging, Fast Wireless Charging & more. Buy now from Samsung India.
www.samsung.com

enigmaamit said:
You can use accubattery, Ampere or Device Info HW to check OS reported battery temp. Accubattery and Ampere will also show you charging current details
Click to expand...
Click to collapse
All good
Check screen shot

nitinvaid said:
Just got new S21 Ultra and i have my Oneplus Wireless charger Warp 30 its detecting the charge but device always say charging paused and then it starts again and again charging paused its stuck in same loop?
cant i use the oneplus wireless charger in this phone?
Click to expand...
Click to collapse
I have an S21 Ultra as well as 9 Pro. Have both the 30 watt wireless charger and the 50 watt wireless charger, the S21 Ultra doesn't charge on the 30 watt wireless One Plus charger but charges fine on the 50 watt wireless charger as well as other standard qi chargers. Just not on the 30 watt.

zoman7663 said:
I have an S21 Ultra as well as 9 Pro. Have both the 30 watt wireless charger and the 50 watt wireless charger, the S21 Ultra doesn't charge on the 30 watt wireless One Plus charger but charges fine on the 50 watt wireless charger as well as other standard qi chargers. Just not on the 30 watt.
Click to expand...
Click to collapse
Same here. I have both fast chargers and the 30 watt charger won't charge any of my Samsung phones. It will start and then pause immediately.

nitinvaid said:
All good
Check screen shot
Click to expand...
Click to collapse
If it's not the phone at fault, then that just leaves the charger as the culprit

nitinvaid said:
Will check that too just to confirm
Which Samsung wireless charger is good ?
Convertible Wireless Charger (White) | Samsung India
Buy Samsung's new Convertible Wireless Charging Pad/Stand (White) with Fast Wireless Charging, Compatible with Qi-certified devices & more including price & Specs.
www.samsung.com
Or
Trio Pad Wireless Charger (Black) - Price & Specs | Samsung India
Buy Trio Pad Wireless Charger (Black) online. Explore all features like 3-in-1 Wireless Charging, Fast Wireless Charging & more. Buy now from Samsung India.
www.samsung.com
Click to expand...
Click to collapse
The trio is usually Out of Stock in the indian Samsung online store.
There is a 15 Watt wireless fast charger also which is a little faster, but the fan makes it pretty noisy (go through amazon reviews). And it's always out of stock.
The Trio would be nice to have if it was in stock. You can charge two devices and a Galaxy watch.
Personally, I'd get the Duo (if you have a galaxy watch too) or just the single charging pad from Sasmsung for headache free charging.
Get the convertible one (first link you shared) if you like to view your phone screen while it's wirelessly charging.
All of them charge at the same rate (9W max) except the 15W charger stand with fan.
Personally I'm using the Spigen Steadiboost flex 15W Wireless charger. Supports fast wireless charging (max 10W for Samsung)
Bought it when all Samsung wireless chargers were out of stock...

Try clearing the system cache on the boot menu.
Try a hard reboot.
Does it charge with the phone powered off?
Does it charge in Safe mode?
Does it fast charge normally?
Try another wireless charger...

zoman7663 said:
I have an S21 Ultra as well as 9 Pro. Have both the 30 watt wireless charger and the 50 watt wireless charger, the S21 Ultra doesn't charge on the 30 watt wireless One Plus charger but charges fine on the 50 watt wireless charger as well as other standard qi chargers. Just not on the 30 watt.
Click to expand...
Click to collapse
chetly968 said:
Same here. I have both fast chargers and the 30 watt charger won't charge any of my Samsung phones. It will start and then pause immediately.
Click to expand...
Click to collapse
There you go... Looks like it's something OnePlus did to the 30W charger that breaks compatibility with the S21U
Can you check if it charges other non-OnePlus phones to see if the issue is limited to Samsung or other phones as well?

zoman7663 said:
I have an S21 Ultra as well as 9 Pro. Have both the 30 watt wireless charger and the 50 watt wireless charger, the S21 Ultra doesn't charge on the 30 watt wireless One Plus charger but charges fine on the 50 watt wireless charger as well as other standard qi chargers. Just not on the 30 watt.
Click to expand...
Click to collapse
okay... i have the 30W charger so its waste

enigmaamit said:
There you go... Looks like it's something OnePlus did to the 30W charger that breaks compatibility with the S21U
Can you check if it charges other non-OnePlus phones to see if the issue is limited to Samsung or other phones as well?
Click to expand...
Click to collapse
It doesn't chargey daughters iphone either. Same issue.

Question Single USB C charger for laptop and S21 Ultra

Hi all,
I'm looking for a charger that has 2 USB C ports and a USB A port to charge my macbook pro, S21U, and Galaxy watch4 simultaneously. Any suggestions?

amirage said:
Hi all,
I'm looking for a charger that has 2 USB C ports and a USB A port to charge my macbook pro, S21U, and Galaxy watch4 simultaneously. Any suggestions?
Click to expand...
Click to collapse
https://www.amazon.com/UGREEN-Charger-Charging-Adapter-Nintendo/dp/B08GSFXZZ2/ref=mp_s_a_1_6?crid=Z1XDKA4HY4UK&keywords=ugreen+type+c+65w&qid=1636898772&qsid=137-7809039-4711910&sprefix=ugreen+type+c+65w%2Caps%2C132&sr=8-6&sres=B09BZNBJ75%2CB088FHJLR1%2CB086PSF44H%2CB08GSFXZZ2%2CB07S82CRXJ%2CB08ZJ4P99P%2CB07VJNGN1N%2CB07RZY9P1H%2CB07R7K2QMW%2CB07XKYR62K%2CB071CKG3FC%2CB091Z6JNX4%2CB07VKSMV2V%2CB087611KL2&srpt=CHARGING_ADAPTER

paleta said:
https://www.amazon.com/UGREEN-Charger-Charging-Adapter-Nintendo/dp/B08GSFXZZ2/ref=mp_s_a_1_6?crid=Z1XDKA4HY4UK&keywords=ugreen+type+c+65w&qid=1636898772&qsid=137-7809039-4711910&sprefix=ugreen+type+c+65w%2Caps%2C132&sr=8-6&sres=B09BZNBJ75%2CB088FHJLR1%2CB086PSF44H%2CB08GSFXZZ2%2CB07S82CRXJ%2CB08ZJ4P99P%2CB07VJNGN1N%2CB07RZY9P1H%2CB07R7K2QMW%2CB07XKYR62K%2CB071CKG3FC%2CB091Z6JNX4%2CB07VKSMV2V%2CB087611KL2&srpt=CHARGING_ADAPTER
Click to expand...
Click to collapse
I did notice this but was skeptical on the 65W PD. Not sure if the S21U can handle 65W...45W is possible because that's where the stock Samsung charger lands when super fast charging.

amirage said:
I did notice this but was skeptical on the 65W PD. Not sure if the S21U can handle 65W...45W is possible because that's where the stock Samsung charger lands when super fast charging.
Click to expand...
Click to collapse
S21U doesn't allow 45W charging either, no matter which charger you use. USB PD uses a two way handshake protocol, and the charger will only supply whatever the phone allows depending on temperature, charge level etc. You can use any wattage PD certified charger safely. If you're planning to charge your MacBook, 65W would be good for a decent charge rate. 25W or 45W wouldn't be ideal for a laptop. The 65W charger will be good for charging any PD certified device, at least according to my understanding of USB PD.

enigmaamit said:
S21U doesn't allow 45W charging either, no matter which charger you use. USB PD uses a two way handshake protocol, and the charger will only supply whatever the phone allows depending on temperature, charge level etc. You can use any wattage PD certified charger safely. If you're planning to charge your MacBook, 65W would be good for a decent charge rate. 25W or 45W wouldn't be ideal for a laptop. The 65W charger will be good for charging any PD certified device, at least according to my understanding of USB PD.
Click to expand...
Click to collapse
Oh, my bad..I think the max S21U supports is 25W. The funny thing is that when I charge using my battery bank the phone says Fast charging. When on stock charger, it's just charging! Don't understand why..but I guess the stock charger just plays it safe to protect the phone's battery. I guess this charger shared earlier wouldn't harm the phone's battery...

amirage said:
Oh, my bad..I think the max S21U supports is 25W. The funny thing is that when I charge using my battery bank the phone says Fast charging. When on stock charger, it's just charging! Don't understand why..but I guess the stock charger just plays it safe to protect the phone's battery. I guess this charger shared earlier wouldn't harm the phone's battery...
Click to expand...
Click to collapse
When you say stock charger, which one do you mean? Coz the phone doesn't come with one. Did you buy a charger from Samsung separately?
I have the 15W Samsung charger which came with my Galaxy Tab S7 (USB A to C cable) as well as the USB PD 25W charger from Samsung (this one uses a USB C to C cable). Both support Samsung's Adaptive Fast Charging protocol and the latter supports PD. With the first one, i get fast charging displayed while charging, while with the latter, it shows super fast charging. I've kept both options enabled in settings. Not sure why your charger isnt fast charging your phone. Can you share exactly which charger and cable you're using?

enigmaamit said:
When you say stock charger, which one do you mean? Coz the phone doesn't come with one. Did you buy a charger from Samsung separately?
I have the 15W Samsung charger which came with my Galaxy Tab S7 (USB A to C cable) as well as the USB PD 25W charger from Samsung (this one uses a USB C to C cable). Both support Samsung's Adaptive Fast Charging protocol and the latter supports PD. With the first one, i get fast charging displayed while charging, while with the latter, it shows super fast charging. I've kept both options enabled in settings. Not sure why your charger isnt fast charging your phone. Can you share exactly which charger and cable you're using?
Click to expand...
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I have the original samsung charger that I got as an offer when I got the phone. I have the fast charging option enabled and not the super fast option in the phone. Super fast charging does work but not fast charging!

amirage said:
I have the original samsung charger that I got as an offer when I got the phone. I have the fast charging option enabled and not the super fast option in the phone. Super fast charging does work but not fast charging!
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That's what I'm asking. Which charger? The 15W one or the 25W one? I'm not sure which one you got on offer.

enigmaamit said:
That's what I'm asking. Which charger? The 15W one or the 25W one? I'm not sure which one you got on offer.
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D-oh.. it's the 25W one...it has super fast charging plastered over it...

I'm also looking for something similar to you

paleta said:
https://www.amazon.com/UGREEN-Charger-Charging-Adapter-Nintendo/dp/B08GSFXZZ2/ref=mp_s_a_1_6?crid=Z1XDKA4HY4UK&keywords=ugreen+type+c+65w&qid=1636898772&qsid=137-7809039-4711910&sprefix=ugreen+type+c+65w%2Caps%2C132&sr=8-6&sres=B09BZNBJ75%2CB088FHJLR1%2CB086PSF44H%2CB08GSFXZZ2%2CB07S82CRXJ%2CB08ZJ4P99P%2CB07VJNGN1N%2CB07RZY9P1H%2CB07R7K2QMW%2CB07XKYR62K%2CB071CKG3FC%2CB091Z6JNX4%2CB07VKSMV2V%2CB087611KL2&srpt=CHARGING_ADAPTER
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I have this one as well and I can say that it can charge my S21U and my hp spectre x360 without issues; excellent build quality as well.

amirage said:
I have the original samsung charger that I got as an offer when I got the phone. I have the fast charging option enabled and not the super fast option in the phone. Super fast charging does work but not fast charging!
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Click to collapse
I checked with my charger too. With super fast charging turned off, even my phone displays only charging. With it turned on, display shows super fast charging. It seems the stock charget doesn't display fast charging. Either charging or super fast charging only. Intended behaviour? Bug? Dunno.