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LG G4, stock battery, quick charging 2.0 and AUKEY charger, is it a safe match?

Hi, I've recently bought a LG G4 and this certified 2.0 charger:
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...it's still boxed and I've also found a thread here in XDA sayin it doesn't work on G4. For some reasons. I still haven't tested it. Yet the reviews of LG G4 owners on Amazon of this particular charger are all very positive.
ANYWAY
Prior to the LG G4 release I read a few articles that talked about a certain 3300mA battery that was Quick Charge 2.0 compatible.
This puzzles me.
THE QUESTION:
Do I need such 3300mA battery or a QuickCharge 2.0 special battery to *safely* quick charge my LG G4, or is the stock 3000mA battery ok?
(OPTIONAL QUESTIONS)
1) Is it going to damage my phone/battery in some way? Will the battery life get shorter? Will it overheat causing the phone/battery any damage?
2) How is it possible that a Qualcomm Quick Charge 2.0 certified charger does not work with the G4?
3) Could you suggest me a trusted, working charger, possibly under 15 euros?
Thanks for your time!

I think when you get people to say it doesn't work, doesn't mean it won't charge. It means that you won't get the additional benefit of quickcharge 2.0. AFAIK, the phone will still charge at higher amp (5V 1.8A), but will not charge at the QC 2.0 (9V 2A) standard.

Contivity said:
I think when you get people to say it doesn't work, doesn't mean it won't charge. It means that you won't get the additional benefit of quickcharge 2.0. AFAIK, the phone will still charge at higher amp (5V 1.8A), but will not charge at the QC 2.0 (9V 2A) standard.
Click to expand...
Click to collapse
Thanks for your answer. I still don't know what to think because LG-G4 owners' reviews on Amazon are all positive and satisfied with the increased charging speed.
What about the main question?

I use the same exact charger on my G4. It's great.
1. No damage, and your battery life won't be any shorter than regular charging. The QC is set to slow down after 60%, if I'm not mistaken.
2. Don't know who told you that it wouldn't work with the G4..
3. Who says you have to pay a lot for quality? It's a charger..

Sfkn2 said:
I use the same exact charger on my G4. It's great.
1. No damage, and your battery life won't be any shorter than regular charging. The QC is set to slow down after 60%, if I'm not mistaken.
2. Don't know who told you that it wouldn't work with the G4..
3. Who says you have to pay a lot for quality? It's a charger..
Click to expand...
Click to collapse
1. I heard 75% myself but either way it slows down.
2. The G4 seems to be finicky to what QC2.0 charger it wants to work with. There are reports of it not working with the aukey and reports of it working with the aukey.
3. Cheap crappy chargers can actually cause harm. If it's QC2.0 certified there's no problem.

Eagle1337 said:
1. I heard 75% myself but either way it slows down.
2. The G4 seems to be finicky to what QC2.0 charger it wants to work with. There are reports of it not working with the aukey and reports of it working with the aukey.
3. Cheap crappy chargers can actually cause harm. If it's QC2.0 certified there's no problem.
Click to expand...
Click to collapse
The aukey seems to charge a lot faster than nexus 6 turbo charger

NeatWolf said:
Thanks for your answer. I still don't know what to think because LG-G4 owners' reviews on Amazon are all positive and satisfied with the increased charging speed.
What about the main question?
Click to expand...
Click to collapse
Well... I guess you should ask from manufacturer then...... LOL

Eagle1337 said:
1. I heard 75% myself but either way it slows down.
2. The G4 seems to be finicky to what QC2.0 charger it wants to work with. There are reports of it not working with the aukey and reports of it working with the aukey.
3. Cheap crappy chargers can actually cause harm. If it's QC2.0 certified there's no problem.
Click to expand...
Click to collapse
Thanks for your answers
I got [phone was off] 30% after 20 minutes
55% after 40 minutes
75% after 1 hour
then took 40 minutes for the remaining 25%, 10 minutes the last 5 percent alone.
Is QC2.0 working? I haven't ever measured normal charge percentages. It was a little bit hot in the first hour, then it cooled down.
I used the USB cable shipped with the AUKEY charger since the instructions say "please use the included cable for your non-iOS device" or something like that.
Should I keep using it or using the original G4 cable will make a difference?
Could you please suggest me a good (possibly cheap) QC2.0 certified charger from another brand that has a more... constant behaviour with the G4?
Thanks for your time

several days ago, i buy aukey multiport QC 2.0. From my experience, QC 2.0 does not give any advantage to G4, compare to original charger. It's need 102 minute from 5% to 100%. Stock charger need 105 minute from 5% to 100%. claim that's QC 2.0 will charge 60% for 30 minute, not proven using aukey. When i test using usb voltage and current tester, aukey using 9V. So i'm curious, is really G4 is qualcomm QC 2.0 compatible ? Yes, it's can use 9V for charging, but not get advantage charging 60% for 30 minute, and not much different from stock charging that only using 5V.
Something make me curious to, why other charger with more than 2A output, needed about 3hour (or more), compare to G4 stock charging (1.8A). Is this stok charging made spesial for fast charging too ? and G4 cannot get advantage from other charger, although it's have more than 2A output ?

My genuine Samsung fast adaptive charger charges my G4 about 20%+ faster. May be an Aukey problem.

I don't think aukey is the problem. It can charge at 9v, than regular 5v. But it not make it more faster than stock charger.
But for Samsung charger, yes, it can charged faster than stock charger, according to my mailing list friend. I'm not try using it yet, just order another QC 2.0 charger. LVSun 4 port charger, can be use for desktop or car charger.
Sent from my LG-H818 using Tapatalk

I bought this one http://www.amazon.com/gp/product/B00ZZG6IKU?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00
and it does not appear to charge any faster than regular car charger i had before. Ampere+ reports 1375mA or so

I heard that LG G Flex2, G4, is compatible with the Quick Charge 2.0 tech. If the phone is compatible, it is safe to charge it with a quick charger. And my friend use the Aukey 10000mAh Portable fast charger to charge his iphone. He says the charger works well and I wanna try it.

I just bought a Tronsmart Quick Charge charger and it charged from 15% to 100% in about 1:15 hours while a Samsung 2.1A charger (the one that came with my S4) charges it in 4 hours from 10% to 100%

If it slow down it's useless, I need to charged my phone before I leave home, like I have 80% because I used it during morning, but before leave home I need 100%...

So I just charged my phone with the original charger for the first time and it is actually giving me Quick Charge 2.0 speeds. From 27% to 67% in 40 minutes which translates to 1% every minute.

AUKEY Fast Charger ... Works great
I have the Aukey Pa-T1 5 Port Qualcomm 2.0 Certified Charger. It does charge faster than stock LG Charger. Generally, it seems to charge 1% or more per minute but slows down after about 80% charged. I have been using the LG Stock 3000ma batteries with the charger. Aukey guarantees that the charger will not harm the battery or phone. There is a special circuit inside the charger to regulate proper charging. The only way this charger won't work correctly is if you have a knockoff battery or cheap cable.

I have aukey 3 port usb quick charge and it is much faster than original LG one. Almost 3 times faster!
Sent from my LG-H815 using XDA Free mobile app

Must be something wrong with your stock charger or cable my aukey charges from 10% to 100 in about an hour stock charger is only about 20mins longer. I have 815 korean variant

scote said:
Must be something wrong with your stock charger or cable my aukey charges from 10% to 100 in about an hour stock charger is only about 20mins longer. I have 815 korean variant
Click to expand...
Click to collapse
I used same cable. As I know LG charger does not have quick charge, maybe that is the reason.
Anyway I use LG charger for raspberry pi now
Sent from my LG-H815 using XDA Free mobile app

Found replacement fast charger (UPDATE 8/10/16)

I took a chance for the fun of it and bought a 15 dollar (at the time of writing this) charger from newegg here and it works perfectly. This post took me about 5 minutes to write and i plugged my Mate 8 in a 43% and now it is at 54%. When it plugs in, it even gives me the Fast Charging notification and says so on the lock screen. Highly recommend it, for USA owners only or you will need a converter plug.

I think you need the original hauwei quick charger to get 9v2.4a "quick charge".
Im using a QC 2.0 which should do 9v2a, but do not get "quick charge" message, and using software, only see up to 1.7ah; however with the original charger; I get 2.6ah.
What I also noticed was the with the original charger its goes up to 2.6ah in bursts (from 1.4 to 2.6ah) and not constant, while the QC 2.0 have constant 1.7ah.
Not sure which is faster. Also some cables don't go above 500mah, and some cables do give "quick charge" message on original charger. Ordered USB voltage tester to test more.
Im also looking for source for cheap oem hauwei charger.

HUAWEI HW-059200CHQ with EU plug: https://www.aliexpress.com/item/100...L-Charger-adapter-for-Huawei/32668184405.html

Huawei charger with option for EU or US plug.
http://www.ebay.com/itm/Genuine-9V-...hash=item2a6b21d483:m:mKEdY4PKIJdpJ0H_NQVZoCQ

As long it covers the signed agreement between Huawei (FCP) and Qualcomm QC2.0 to support both standards it should work with our mate 8. It must be a 9V2A , be careful some of those sold on AliExpress may have only one voltage of 5v1a and that won't do any fast charging.

ronnie72 said:
Huawei charger with option for EU or US plug.
http://www.ebay.com/itm/Genuine-9V-...hash=item2a6b21d483:m:mKEdY4PKIJdpJ0H_NQVZoCQ
Click to expand...
Click to collapse
Just got the EU version of this one in, can confirm it's identical to the one that came with my Mate 8 and does proper quick charging.

Amazon Good Replacement Quick Charger
this is compatible for the US..very fast charging..even more so than the original charger the Mate 8 came with..I went from 40% until 67% in just under 15 minutes

so i just got mate 8. as usually everyone need more than one charger. is it true that even a charger with QC 2.0 will not charge our phone as fast as the original charger?
i dont have budget to buy $30 charger - will check ebay later.
---------- Post added at 11:15 AM ---------- Previous post was at 11:12 AM ----------
keyid said:
I think you need the original hauwei quick charger to get 9v2.4a "quick charge".
Im using a QC 2.0 which should do 9v2a, but do not get "quick charge" message, and using software, only see up to 1.7ah; however with the original charger; I get 2.6ah.
What I also noticed was the with the original charger its goes up to 2.6ah in bursts (from 1.4 to 2.6ah) and not constant, while the QC 2.0 have constant 1.7ah.
Not sure which is faster. Also some cables don't go above 500mah, and some cables do give "quick charge" message on original charger. Ordered USB voltage tester to test more.
Im also looking for source for cheap oem hauwei charger.
Click to expand...
Click to collapse
this is copy pasted from someone else reply regarding my question of why QC 2 charger is slower than original huawei.
*************
They both have the same power QC 9V x 2A =18W or 12V x 1.5V =18W compared to Huawei 9V 2A =18 Watts
However for the Huawei Mate 8, the only charger that will give you 18W worth of charging power is the Huawei SmartPower charger. Anything else charges it at 10W maximum.
And the Huawei SmartPower charger can only charge other devices at 5V 2A = 10W as well. It only switches up to 9V when it sees a Huawei chip inside the other device.
So it's not 12V 1.5A being 0.5A less than 9V 2.0A - Power is Volts multiplied by Amps.
On that particular phone, if you use a Huawei charger you get 18W. If you use ANY non-Huawei charger, you get 10W.
If the battery capacity is 4000mAh at nominal 3.7V, and the charging circuit is 80% efficient then you need to chuck (4 x 3.7 / 0.8) = 18.5 Watts of power into it to charge it. An 18W charger will do that in just over an hour. A 10W charger will take 1.85 Hours which is almost double the time.
****************

Keep in mind that fast charging wears out the battery more than regular charging. If you have time, use a normal charger with lower current.

Bah, what doesnt wear out a lithium battery? Fast charge on, we can all get replacement batteries for this thing. theyre cheap anyway.

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!

33W Charger

Are there any other devices with the same power output? I have various Oneplus chargers, and a couple of Quick charge 3.0, but would like a spare fast charger.

MarkRobert said:
Are there any other devices with the same power output? I have various Oneplus chargers, and a couple of Quick charge 3.0, but would like a spare fast charger.
Click to expand...
Click to collapse
You can buy the xiaomi 27W QC4 charger it does 27-35W

realme x2 pro has 50W, so something there shud fit

I've tried various chargers but the SOC was >85% so it wasn't a proper test. With most charger (QC or PD) I've gotten 15W, including with my 65W PD laptop charger. With the original charger I got 20-22W. If it's important to check the power, I can wait until it's discharged and redo the tests, which I plan to do anyway.
For travelling, I find it a lot more useful to have the 36W (18W QC + 18W PD?) cheap Amazon charger with 2xUSB-A and 1xUSB-C, which has the same size as the original charger: https://smile.amazon.de/gp/product/B07WFDTJFR/

Let us know how you get on. I tried my Samsung 25w charger, Pixel 3 charger and the Motorola 18w charger. All of them charge at 12-18w only. Stock charger goes to around 27w

I've now tried all the chargers and powerbanks that I have, QC3 or PD. All of them cap out at 16W, even though they can deliver more. I got the original one to charge with 30W (at 60% SOC).
The original charger is marked QC3 but they are probably not following the standard.

From my understanding the Snapdragon 732g has Quick Charge 4+ support doesn't it ?

manu1991 said:
Let us know how you get on. I tried my Samsung 25w charger, Pixel 3 charger and the Motorola 18w charger. All of them charge at 12-18w only. Stock charger goes to around 27w
Click to expand...
Click to collapse
Yes, i've noticed the same. Around 27w max. Today i was charging my phone and observing the batt temperature. Kinda obvious, but the hotter the battery gets, the lower charging power it will deliver. Here in Brazil the temp this week is being around 36-42°C, so i put the phone over a bar of artificial ice. As the batt temp went under 35°C, the resultant "charging current" went to around 5500-6000mA. Doing the math, it was possible to arrive at the 27w result. (~4,5V x 6 = 27w).
When the batt temp was near 38~39°C, charging was down to 2000-2800mA (resulting to around 10-12w).
I also found something strange, it wasn't able to show the charging percentage with 2 decimals, as shown in this video:
https://www.youtube.com/watch?v=2Y8ja08uGEQ

Can someone give me a link for a u.s. charger for poco x3 device??

danieliswhattheycallme said:
Can someone give me a link for a u.s. charger for poco x3 device??
Click to expand...
Click to collapse
maybe this?
https://it.aliexpress.com/item/1005001516773316.html?spm=a2g0o.productlist.0.0.221f1870n5uSWW&algo_pvid=e82d72d7-5dac-413a-8e05-1657b2124e88&algo_expid=e82d72d7-5dac-413a-8e05-1657b2124e88-15&btsid=0b0a187916118446027031496e9a4e&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

For me GAN 65W chargers (Baseus) are good and universal quick chargers.
I have made a quick test in the thread Chargers and Charging speed

Question 100w same as 25w?

hi with my ultra i got a free 25w samsung charger
i bought a 100w ugreen charger :
ingle-PortUSB-C1/C2：5V/3A 9V/3A 12V/3A 15V/3A 20V/5A 100W Max
USB-C3： 5V/3A 9V/2.5A 12V/1.88A 22.5W Max
USB-A： 4.5V/5A 5V/4.5A 5V/3A 9V/2A 12V/1.5A 22.5W Max
with a cable 100 PD
when connecting my tablet says same time to charge 100%
and ampere app shows this photos
{
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"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
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do you know what is happening here?

I don't have any information to illuminate what's going on, but this sounds familiar enough that I think at least one or two other users in this section have reported something similar. Me, I try not to quick/fast charge any more than I have to, and I keep my battery between 25 and 75%, so I don't pay that close attention.

I haven't used Ampere. I assume the top is the charging current? The one on the left shows a higher current, 5.58 amps, vs 4.40 amps. Higher current for a given voltage means more power is being transferred, thus a higher charge rate...but even 5 amps is pretty high. That's why fast charging schemes use higher voltages, because a given conductor can usually handle a higher voltage better than it can handle a higher current.
[email protected]=15W
[email protected]=21W
[email protected]=36W
[email protected]=45W
[email protected]=100W
The Galaxy S8 is advertised to be able to charge at a 45 watt rate, max, so if this is true, a 100w charger wouldn't charge any faster as both devices would negotiate a max of 45 watts. This is assuming both the device and the charger limit the charge current; I imagine many devices will draw more power than they're rated, and many chargers will try to supply it, although the load might pull the voltage down.

V0latyle said:
I haven't used Ampere. I assume the top is the charging current? The one on the left shows a higher current, 5.58 amps, vs 4.40 amps. Higher current for a given voltage means more power is being transferred, thus a higher charge rate...but even 5 amps is pretty high. That's why fast charging schemes use higher voltages, because a given conductor can usually handle a higher voltage better than it can handle a higher current.
[email protected]=15W
[email protected]=21W
[email protected]=36W
[email protected]=45W
[email protected]=100W
The Galaxy S8 is advertised to be able to charge at a 45 watt rate, max, so if this is true, a 100w charger wouldn't charge any faster as both devices would negotiate a max of 45 watts. This is assuming both the device and the charger limit the charge current; I imagine many devices will draw more power than they're rated, and many chargers will try to supply it, although the load might pull the voltage down.
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one photo is from a 100w charger the higher value one
the other photo is from the 25w samsung charger that came with my ultra
so i dont know why the tablet is showing the same time to full charge

roirraW edor ehT said:
I don't have any information to illuminate what's going on, but this sounds familiar enough that I think at least one or two other users in this section have reported something similar. Me, I try not to quick/fast charge any more than I have to, and I keep my battery between 25 and 75%, so I don't pay that close attention.
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Do you have the text super fast charging 2.0 when charging your tablet?
I don't

waltdisneypixar said:
one photo is from a 100w charger the higher value one
the other photo is from the 25w samsung charger that came with my ultra
so i dont know why the tablet is showing the same time to full charge
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Probably because your tablet can't charge at a rate any higher than 45W - 15v @ 3 amps.

V0latyle said:
Probably because your tablet can't charge at a rate any higher than 45W - 15v @ 3 amps.
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That is correct it can only take 45w so 100w won't work. It will only limit the 100w charger down to 45w

waltdisneypixar said:
hi with my ultra i got a free 25w samsung charger
i bought a 100w ugreen charger :
ingle-PortUSB-C1/C2：5V/3A 9V/3A 12V/3A 15V/3A 20V/5A 100W Max
USB-C3： 5V/3A 9V/2.5A 12V/1.88A 22.5W Max
USB-A： 4.5V/5A 5V/4.5A 5V/3A 9V/2A 12V/1.5A 22.5W Max
with a cable 100 PD
when connecting my tablet says same time to charge 100%
and ampere app shows this photos View attachment 5659897View attachment 5659899
do you know what is happening here?
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You shouldn't look up what a USB port can take. It also depends on what main board and battery can take. In this case s8 ultra is limited to max 45w. So your 100w charger won't go 100w on this tablet because it does not support it.

the charge circuits are limited to a max input wattage and voltage. to protect the device from being burnt out. it is not like the good old days where you could pump as many watts and volts you wanted into a device hoping that you didn't burn it up, blow the fuse or a diode. now everything is limited to a max input. a lot of it has to do with the brand x / universal chargers being sold. that claim they charger faster when really they don't.

The question is not about 100w
it is about 100w doing 45w vs 25w charger and same time charging

waltdisneypixar said:
The question is not about 100w
it is about 100w doing 45w vs 25w charger and same time charging
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I don't know. They're both charging at about 5 amps which is honestly pretty high. Nothing indicates the actual charging rate in watts because it doesn't display the charger voltage. I will say I'm rather skeptical of strange off brand Chinese tech so it's possible you'd get better results with a different charger.

Question is neither is showing super fast charging 2.0

Fast charging is on in settings. It shows super fast charging but not 2.0

I got the same issue with my s22 ultra...The charger must have the right specs and the cable must be 5a. If not, you won't get super fast charging 2.0. This will only give 25w fast charging. I have a 65w ugreen charger that has all the right specs...It has 65w max on 1 port and when other devices are connected on the other ports it distributes the 65w over the ports. I used the cable that came with the tabs s8 ultra and got the same as you, not charging to it's full potential. Bought a ugreen 5a cable and now it shows super fast charging 2.0 on my tab s8 ultra and s22 ultra. The charger and the usb cable must be 100 % correct, otherwise you won't get max charging speeds.

termdj said:
I got the same issue with my s22 ultra...The charger must have the right specs and the cable must be 5a. If not, you won't get super fast charging 2.0. This will only give 25w fast charging. I have a 65w ugreen charger that has all the right specs...It has 65w max on 1 port and when other devices are connected on the other ports it distributes the 65w over the ports. I used the cable that came with the tabs s8 ultra and got the same as you, not charging to it's full potential. Bought a ugreen 5a cable and now it shows super fast charging 2.0 on my tab s8 ultra and s22 ultra. The charger and the usb cable must be 100 % correct, otherwise you won't get max charging speeds.
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i have the ugreen 100w charger with the 2m pd100 5A cable ( it says 5A in the end of the cable ) that came as a pack in ali but not seeing super fast charging 2.0.

Mine was exactly the same. Bought a different ugreen cable and the 2nd cable worked. Dont know why it worked. Looks the same as the one that came with the charger, just a longer cable

waltdisneypixar said:
i have the ugreen 100w charger with the 2m pd100 5A cable ( it says 5A in the end of the cable ) that came as a pack in ali but not seeing super fast charging 2.0.
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The cable makes absolutely no difference in the actual charge rate. Being rated for higher current just means the conductors are larger.
When you connect the device to the charger, the two negotiate a mutual rate.

termdj said:
Mine was exactly the same. Bought a different ugreen cable and the 2nd cable worked. Dont know why it worked. Looks the same as the one that came with the charger, just a longer cable
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I just bought a baseus 100pd with digital monitor that tells the W. Let you know when i try

It is the cables! Cables! Cables! Cables! -- It's a dirty word!
Please see
Superfast charging + emark cables -- are they needed?
So I have a 45W charger, thinking about purchasing a 65W charger. I know The Tab S8 Plus only goes to 45W. My question: are there any advantages to using an emark enabled cable? I'm getting super fast charge notice with a 60W cable, no emark...
forum.xda-developers.com
If you have a normal 5A cable, all PD charges are throttled to 25W (or less). Your tablet (at best) will show "Super fast Charge" and you will see something like 5A @ 4.12V when running Ampere. This is the power going into the battery -- the PD Charger is probably delivering something like 4A @ 5V. Around 20W going into the battery. I assume the "missing" 5W is powering the tablet - i.e. Ampere only shows what is going into the battery.
To get more than 25W, you need special "e-mark" chipped cables. These allow current higher than 5A to be delivered. They will be generally be rated by power -- 100W -- not current. I use
https://www.amazon.com/dp/B09G5XQG3T
This will allow the PD charger to run higher than 25W and you will see "Super Fast Charging 2.0" for charge status.
When I use the 100W cable, the tablet charges iin "Super Fast Charging 2.0" mode, and Ampere tells me the battery is receiving 7A @ 4.12V, or ~ 30W. Because I'm using the tablet at the same time I again assume some additional power is going to powering the tablet -- but that Ampere is only showing what is going into the battery. So maybe this bumps it up to 35W total. I have 45W and 65W power delivery bricks, so I assume the ~ 35W-ish delivery is being controlled by the tablet.
Note: The cable "in the box" with my Tab S8+ was NOT chipped, and was limited to 25W.
take care,
Joe

drjoe1 said:
It is the cables! Cables! Cables! Cables! -- It's a dirty word!
Please see
Superfast charging + emark cables -- are they needed?
So I have a 45W charger, thinking about purchasing a 65W charger. I know The Tab S8 Plus only goes to 45W. My question: are there any advantages to using an emark enabled cable? I'm getting super fast charge notice with a 60W cable, no emark...
forum.xda-developers.com
If you have a normal 5A cable, all PD charges are throttled to 25W (or less). Your tablet (at best) will show "Super fast Charge" and you will see something like 5A @ 4.12V when running Ampere. This is the power going into the battery -- the PD Charger is probably delivering something like 4A @ 5V. Around 20W going into the battery. I assume the "missing" 5W is powering the tablet - i.e. Ampere only shows what is going into the battery.
To get more than 25W, you need special "e-mark" chipped cables. These allow current higher than 5A to be delivered. They will be generally be rated by power -- 100W -- not current. I use
https://www.amazon.com/dp/B09G5XQG3T
This will allow the PD charger to run higher than 25W and you will see "Super Fast Charging 2.0" for charge status.
When I use the 100W cable, the tablet charges iin "Super Fast Charging 2.0" mode, and Ampere tells me the battery is receiving 7A @ 4.12V, or ~ 30W. Because I'm using the tablet at the same time I again assume some additional power is going to powering the tablet -- but that Ampere is only showing what is going into the battery. So maybe this bumps it up to 35W total. I have 45W and 65W power delivery bricks, so I assume the ~ 35W-ish delivery is being controlled by the tablet.
Note: The cable "in the box" with my Tab S8+ was NOT chipped, and was limited to 25W.
take care,
Joe
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