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Fast Charging Damage Battery anymore?

Just got my Note 8, second hand from swappa. My last phone was a Note Edge (note 4 variant). I remember back in those days (2014) people would say that fast charging was bad for battery. I did notice as time went on my batteries would get super warm. I have a zero lemon I'd quick charge
With newer phones like the Note 8, do I need to worry about how much I fast charge or is that no longer an issue. I definitely like my phone charged fast, who doesnt but are there bad effects to this anymore or have they mostly been ironed out. And I heard somewhere battery discharges slower with normal charge as opposed to fast charge?

Well, fast charge is really useful when, as its name implies, you need to recharge quicly for whatever reason, but giving it some little thinking I supose that fast charge has some caveats, if not, why this fast charge is not the standard way to charge? You see, there must be a very good reason for that, I prefer wireless charge btw

Yes, fast charging will always be bad for a lithium. However there are different forms of fast charging. The stock power supply switches 5 volts, 9 volts or even 12 volts! These should be avoided. With USB C you can get high wattage chargers like the MOTO 15 that will fast charge your device on the 5v rail while using the native USB C high wattage rail acceptance. Or 5V 3A, your phone will say fast charging and turning the feature in the battery settings won't change because it's only disabling 9v and 12v rails.

TechNyne66 said:
Yes, fast charging will always be bad for a lithium. However there are different forms of fast charging. The stock power supply switches 5 volts, 9 volts or even 12 volts! These should be avoided. With USB C you can get high wattage chargers like the MOTO 15 that will fast charge your device on the 5v rail while using the native USB C high wattage rail acceptance. Or 5V 3A, your phone will say fast charging and turning the feature in the battery settings won't change because it's only disabling 9v and 12v rails.
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Are you trying to say disabling fast charging doesn't do anything?

TechNyne66 said:
Yes, fast charging will always be bad for a lithium. However there are different forms of fast charging. The stock power supply switches 5 volts, 9 volts or even 12 volts! These should be avoided. With USB C you can get high wattage chargers like the MOTO 15 that will fast charge your device on the 5v rail while using the native USB C high wattage rail acceptance. Or 5V 3A, your phone will say fast charging and turning the feature in the battery settings won't change because it's only disabling 9v and 12v rails.
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Are you saying that Moto turbo charger 15 is better than stock Samsung Fast charger ? What about Moto Turbo charger 30 up to 5,7A ?

Darktitor said:
Are you saying that Moto turbo charger 15 is better than stock Samsung Fast charger ? What about Moto Turbo charger 30 up to 5,7A ?
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I would think that's overkill, 15 watts is plenty.

Dash Charge Oneplus 3 Charger & Cable on mi 8

Hi ! I had 2 charger for my Oneplus 3 and cable usb type -c ( I had 3 cable usb type-c ugreen too but no charger)
Can I use my Dash charger with my mi 8 ? I had buy a mi 8 and receive it tomorrow global version with EU charger but don't know wich charger it Qc 3.0 or 4.0 ? And with my oneplus Dash charge is 5v 4amp can work on mi 8 or do buy another charger ? Thank you

ggkameleon said:
Hi ! I had 2 charger for my Oneplus 3 and cable usb type -c ( I had 3 cable usb type-c ugreen too but no charger)
Can I use my Dash charger with my mi 8 ? I had buy a mi 8 and receive it tomorrow global version with EU charger but don't know wich charger it Qc 3.0 or 4.0 ? And with my oneplus Dash charge is 5v 4amp can work on mi 8 or do buy another charger ? Thank you
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it will charge at normal speed. I tried myself with original oneplus car dash charger, no fast charging for Mi8.

lockmunk said:
it will charge at normal speed. I tried myself with original oneplus car dash charger, no fast charging for Mi8.
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Ok thanks. I can use it no mistake but slow. I think buy a qc 3 or 4 it's good. For car I have too dash car and it's so good I loose it. I have car charger qc 2 or 3 I don't know.
Thanks

Rommco05 said:
DASH charger is good for OP, strange for others. Highly not recommended to use DASH on other devices than OP
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Why not?
It is a very good 5V charger, with Xiaomi you can expect up to 2A current, not more. Perfectly safe to charge anything, however not quickest charging option for others.

Rommco05 said:
RIP battery. Do u think it is good charging phone with no original charger? Especially with OP DASH
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Bull*hit....
Dash charging just doesnt work on mi8, normal charge will not cause any damage on any other phone or their battery.
you do not necessarily need a original charger from your phone manufacturer.
The phone negotiate how much power the battery gets not the charger ... the charger slows down the load balance to 2,4A (2,4A*5V=12W)
With a 2,4A output you'll reach ~12W at peak due to cable limitations you'll get 10w
QC 3.0 reach ~ 18 watt on peak with variable voltage and ampere steps. (3,6 - 20v)
Same on Dash Charge, Dash uses variable voltage and ampere steps like QC but doubles the charging lanes.
You can charge your phone with any charger you get, the worst you can get is slower charging speed.

tomsag said:
Why not?
It is a very good 5V charger, with Xiaomi you can expect up to 2A current, not more. .
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Bull****, the original MI 8 charge is QC 3.0 and I'm getting up to 3.3A on it.
It's very fast..
---------- Post added at 10:39 AM ---------- Previous post was at 10:36 AM ----------
Flash-User said:
Bull*hit....
Dash charging just doesnt work on mi8, normal charge will not cause any damage on any other phone or their battery.
you do not necessarily need a original charger from your phone manufacturer.
The phone negotiate how much power the battery gets not the charger ... the charger slows down the load balance to 2,4A (2,4A*5V=12W)
With a 2,4A output you'll reach ~12W at peak due to cable limitations you'll get 10w
QC 3.0 reach ~ 18 watt on peak with variable voltage and ampere steps. (3,6 - 20v)
Same on Dash Charge, Dash uses variable voltage and ampere steps like QC but doubles the charging lanes.
You can charge your phone with any charger you get, the worst you can get is slower charging speed.
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What he said.

Rommco05 said:
I see, probably u never heard about optimization, calibration and testing btw and that's isn't about fast or slow charging
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OKay its just your opinion but my opinion is you have no insight in electrical topics or the insight of such an charger.
optimization - the charger doesn't overcharge or use an overvoltage on your phone when its not support their specific fast charge technology it simply slow down to 5v - max. 2.4A, these charging speed will never cause any damage on your phone.
its just simple: an QC phone doesnt use the benefits of SuperCharge technology or Dash Charge and vize versa....
And trust me i've done more calibration and testing in USB charging topics and their different Charging tecnologys as you think (mobile batterys, chargers and so on).
I had several phones and several chargers and compared nearly all of them (QC, FastCharge, VOOC) and there is absolutely nothing dangerous to charge a phone with a QC charger if it is a supercharge phone.
But .... you ever can prove the contrary. I'll never stop learning but you have to tell me some facts.

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.
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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?
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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.
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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.
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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.
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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.
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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...
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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.
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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.
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nreuge said:
I've not finished my tests, answers soon...
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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%.
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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.
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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
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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??
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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 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.
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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?
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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!