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Charging time

I just wanted to know how long it takes to charge Note 2. Mine is on charging the entire night yet it goes to a max of 70%. Where as with hours of charging from pc usb it charges to a 100%.

Get the Galaxy Charging Current app in the play store, then check your cables. Probably bad cable. My original samsung cable was good until a couple months ago when it suddenly went from 1600 ma to 300 ma when it was charging.

Phone modify charge speed whith different cable configuration.
Your cable or connector have a problem.

It's a very simple math. Your N2 battery 3100 mAh. If you use Samsung 2A (2000 mA) charger, it will take you 3100 mAh / 2000 mA = 1.55 h to charge your phone. This is an ideal number considering phone is off (nothing else is draining your battery in parallel). Considering some efficiency factors it will be closer to 2.5 hours since you will not be able to get ideal 2A out of charger anyway. Your charger has the converter and usb cable. If you are not using original converter but rather something you got off ebay, most likely its rated a lot lower, maybe 1A or maybe even less - your charging speed will go down. Then, if you are using cheap usb cables - those might be able to handle only 500 mA of current (typical PC/laptop usb power) - slowing down even more. Plus, when you are charging your phone and you are running some cpu intense apps in the background (like GPS still on, etc.) - you could be discharging your phone at a fast rate in parallel with charging it up.
There are a lot of factors that will be contributing to slow charging speed of your phone. Typically converter and cable are the main ones.

Vectron is quite spot on. My Note 2 charges from >5% to 100% in about 2 and a half hours with the original Samsung AC adapter and USB cable if I'm not using the phone. The charge time dramatically increases if I use a low quality aftermarket cable.

I use an old 850 mA Palm charger which has a nice, thick, low resistance cable. Average time from ~10% to 100% is 3hrs.
Sent from my SPH-L900 using Tapatalk

https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free
Check your charging current with the above app, my Note 2 comes with a 2A stock charger and with the stock usb cable I get average of 1800mAh which would charge my phone from 0% to 100% in about 1~2 hours, i have a few third party charger/cable too, I used the said tool to find out their charging quality.
Also if you got a third party charger, check its label, they usually have the average currents stated there, if you got a 300~460mah charger it will take a while to fully charge your Note 2.

Check your charger or cable it should take a maximum of 2 hours and half to fully charge the phone.
Sent from my GT-N7100 using XDA Premium 4 mobile app

around 2h 15 minutes from 0, charging at 1.6A

iTTi said:
I just wanted to know how long it takes to charge Note 2. Mine is on charging the entire night yet it goes to a max of 70%. Where as with hours of charging from pc usb it charges to a 100%.
Click to expand...
Click to collapse
u might want to install this " GalaxyChargingCurrent_v1.1"
to measure your cable and charger whether supply 2Amp that they should,.
anything show above 1400 then u are fine,

I have an issue charging my 7105 where it will only put through between 100-400mah (according to the Galaxy Current Lite playstore app) through causing 8+ hour charges and fast battery drain, which seemed to be the case with 4 Different MicroUSB cables and 2 chargers.
I ended up fixing this with a custom kernel and rom (beanstalk) using the cable reporting 400 and the original standard charger.
With the uNEAK Engine, I ticked "Ignore 100mA Margin" and "Ignore Unstable Power", jacking up the sliders to max, and I'm now juiced up with 1800mah, charging well within 2 hours.

mobilephone2003 said:
I have an issue charging my 7105 where it will only put through between 100-400mah (according to the Galaxy Current Lite playstore app) through causing 8+ hour charges and fast battery drain, which seemed to be the case with 4 Different MicroUSB cables and 2 chargers.
I ended up fixing this with a custom kernel and rom (beanstalk) using the cable reporting 400 and the original standard charger.
With the uNEAK Engine, I ticked "Ignore 100mA Margin" and "Ignore Unstable Power", jacking up the sliders to max, and I'm now juiced up with 1800mah, charging well within 2 hours.
Click to expand...
Click to collapse
I'm intriuged with this "Ignore unstable power" option in my kernel as well, but it has a warning saying to try at your own risk. Do you think there are any safety issues with ignoring unstable power?

vantt1 said:
I'm intriuged with this "Ignore unstable power" option in my kernel as well, but it has a warning saying to try at your own risk. Do you think there are any safety issues with ignoring unstable power?
Click to expand...
Click to collapse
I can't say there's no risk at all, but the rest of my electronics haven't blown up yet so i'm sure it's fine

mobilephone2003 said:
I can't say there's no risk at all, but the rest of my electronics haven't blown up yet so i'm sure it's fine
Click to expand...
Click to collapse
Sounds safe enough to me!

just want to share my experience : today i tried to charge my phone with LG G2 OEM charger & cable. form 10% - 100% only took amazing ~ 1 hour 20 min :good:. phone on standby, not turned off. i checked LG G2 forum on XDA about where to buy this charger, but no avail. some said they have to call LG US CS support to place order by phone. i didn't have Galaxy Charging Current apps installed when i tried LG's charger. if i can have a hold again, will update here.
here are the charger look :
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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anybody knows where to buy this ?

Charging speed

To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the HTC 10 can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

I don't know but I am not getting so called "15 minutes to 50%" charging speed at all with the provided charger and cable, although it's showing "quick charger is connected".
Sent from my HTC 10 using Tapatalk

nipun1110 said:
I don't know but I am not getting so called "15 minutes to 50%" charging speed at all with the provided charger and cable, although it's showing "quick charger is connected".
Sent from my HTC 10 using Tapatalk
Click to expand...
Click to collapse
I thought it was 30 minutes for 50% - http://www.htc.com/us/smartphones/htc-10/
I don't necessarily get that either per se. I remember getting 50% in 35 minutes tho. http://www.androidcentral.com/qualcomm-announces-quick-charge-30-0-80-35-minutes
I got 44 in 30 minutes. The thing that annoys me is Qualcomm Quick Charge 3.0 is supposed to give you 80% in 35 minutes, but HTC claims to only give you 50%, which is no faster than Qualcomm Quick Charge 2.0, which in reality is even slow than that. Qualcomm Quick Charge 2.0 promised 60% in 30 minutes. So it's like what's the point of having a new technology that isn't better than the previous iteration....

deleted...found appropriate thread.

PryvateiDz said:
I thought it was 30 minutes for 50% - http://www.htc.com/us/smartphones/htc-10/
I don't necessarily get that either per se. I remember getting 50% in 35 minutes tho. http://www.androidcentral.com/qualcomm-announces-quick-charge-30-0-80-35-minutes
I got 44 in 30 minutes. The thing that annoys me is Qualcomm Quick Charge 3.0 is supposed to give you 80% in 35 minutes, but HTC claims to only give you 50%, which is no faster than Qualcomm Quick Charge 2.0, which in reality is even slow than that. Qualcomm Quick Charge 2.0 promised 60% in 30 minutes. So it's like what's the point of having a new technology that isn't better than the previous iteration....
Click to expand...
Click to collapse
Funny thing is I'm getting less heat and faster total charge time off my QC 2.0 charger. Either of my HTC QC 3.0 chargers are slower and get the phone much hotter (I'm assuming due to the higher fluctuating voltage 3.0 offers).
On 3 charge tests the 2.0 beats the 3.0 charger by a good 10 minutes.

datafoo said:
Funny thing is I'm getting less heat and faster total charge time off my QC 2.0 charger. Either of my HTC QC 3.0 chargers are slower and get the phone much hotter (I'm assuming due to the higher fluctuating voltage 3.0 offers).
On 3 charge tests the 2.0 beats the 3.0 charger by a good 10 minutes.
Click to expand...
Click to collapse
I haven't really had a heat issue while charging. But I'm going to try my Anker Powerport +1 Wall Charge (Qualcomm Quick Charge 2.0, also with Voltageboost and PowerIQ), though I've been using that one to charge my Nextbit Robin. I'll see if that makes a difference. I like that HTC including a Quick Charger, but I don't necessarily think it's the best compared to other competitors.

PryvateiDz said:
I thought it was 30 minutes for 50% - http://www.htc.com/us/smartphones/htc-10/
I don't necessarily get that either per se. I remember getting 50% in 35 minutes tho. http://www.androidcentral.com/qualcomm-announces-quick-charge-30-0-80-35-minutes
I got 44 in 30 minutes. The thing that annoys me is Qualcomm Quick Charge 3.0 is supposed to give you 80% in 35 minutes, but HTC claims to only give you 50%, which is no faster than Qualcomm Quick Charge 2.0, which in reality is even slow than that. Qualcomm Quick Charge 2.0 promised 60% in 30 minutes. So it's like what's the point of having a new technology that isn't better than the previous iteration....
Click to expand...
Click to collapse
Good point....so I'm not alone
Sent from my HTC 10 using Tapatalk

My HTC 10 charger stop working.. It doesn't charger my HTC 10 anymore. Anyone else faceing such kind of issue? It suddenly stops working during charging..

I get about 38 minutes to full from 20%
Gets a little warm, but not any hotter than when I have snapchat open.

janjan said:
My HTC 10 charger stop working.. It doesn't charger my HTC 10 anymore. Anyone else faceing such kind of issue? It suddenly stops working during charging..
Click to expand...
Click to collapse
Yes I saw that my charger is incapable of charging my device as it is too slow. It happened for a few minutes. Then I pulled out n in the cable for a few times and it corrected itself don't know how. I am scared. I had great faith on HTC hardwares from my past experience.
Edited: "charger is not compatible....." was a custom kernel issue.
Sent from my HTC 10 using Tapatalk

Did a test:
QC 3.0 (Charger from the box): +45% in 30 minutes
QC 2.0 (Moto Turbocharger): +37% in 30 minutes

hey guys , i bought 10 today
i have a question about charging with power banks , its ok if charging with my Xiaomi Power bank ?

I don't see why not. It will charge slower than with a QC 2.0/3.0, but it should work fine. I have a lot of power banks in my backpack and I use them all the time with any phone I have on me...

Blubb
Haldi4803 said:
So.... here we go. First full charging Benchmark on my HTC 10 completely logged with an USB Powermeter.
From 1% to 100% takes 95 Minutes.
Statistics from BatteryLog app
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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And the Voltage and Current recorded via external Powermeter.
Funny How the charge control completely kills the charging to switch Voltage in Big steps.... as seen on Minute 10 and 48.
Another fun fact is that we see the Battery reach 100% After 95 Minutes.
But does it stop charging? No!
It continues until 150 Minutes..... yes no joke. 2.5 hours! That's 1 hour longer than it needed to reach 100%
And one more Longtime Charge.
What happens if you leave your charger connected over night?
(Nope, not the same date as the 3 above, was on another charge)
(If the pictures are to small, blame Tapatalk resize algorithm. I will Upload full size when I'm back at my PC, which might be somewhen between 2 and 6 months.)
Click to expand...
Click to collapse

Fast! 2.5A is fast!

Mines been plenty quick for me, but its the first phone I've had where I've had the quick charge charger too. I understand the m8 had it though, which was my previous phone.
However, I'm grateful that it isnt crazy fast. The last thing the world needs is another exploding phone lol

my phone stop charging rapidly

a2fast said:
my phone stop charging rapidly
Click to expand...
Click to collapse
If you have a ROM with a custom Kernel, check there first. The fast charge is a setting that can be turned on or off.

from 0~100%, when using the supply QC 3.0 charger it need about 1h35mins, with my anker 5 port 40w charger, it charger at 5V 2A at begining and slowly down to about 1.4a after 70~80%, around 1a when over 90%, total time need is about 2h.
I am using a usb voltage meter to check the voltage/amp.

Hi, i got a htc m10 from second hand, it came with a original htc charger and cable. But charger output is 1.5amps. And i dont feel like "super fast" Thats the real amp for the htc 10 chsrger?

any info on the "quick charge"?

So I got my VIVO XL yesterday, charged it, and used it for one cycle all the way to 1%. I have to say, the battery life was amazing on that first cycle and I was impressed. Phone on time was 15hr 11mins, screen on time was 6hr 41mins, all this on my first charge and at 50% brightness.
I was excited that the battery was at 1% and couldn't wait to use the "quick charge" to see how "fast" it would charge since I never had a device with "quick charge capabilities" before. So I plugged it in, and timed it, what a major disappointment.
Here are the results(phone plugged in at 1%):
1hr @ 43%
1hr15min @ 51%
1hr 30min @ 62%
1hr 45min @ 71%
2hr @ 79%
2hr 15min @ 86%
2hr 30min @ 90%
2hr 45min @ 93%
3hr @ 96%
3hr 15min @ 97%
3hr 30min @ 98%
3hr 45min @ 99%
3hr 56min @ 100% FULL CHARGE
4hrs to charge a phone
Anyone else experience this. This took longer to charge than any device I ever used/tested/played with. and is totally unacceptable. There is no information anywhere as to what this so-called "quick charge" is. When I first plugged it in to charge, it said something about check this box for DU quick charge. What is that? It said I had 18 minutes of quick charge available.
I did some digging around, and the device is supposed to be supplied with a 9V/2A quick charger, I was supplied a 5V/2A charger. I sent an email to BLU in reference to this issue. BLU might owe us all new chargers:silly:
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thanks for the feedback guys

I've given up on getting quick charging on this phone. Since the phone has a mediatek cpu, it supposedly supports Mediatek's version of quick chargings (9v, 2a) which is called PumpExpress+. I bought a Meizu MX5 charger off of aliexpress which is suppose to support PE+. Even with the Meizu charger, I still onyl get 5v and 1.4amps max. I get that charge rate regardless of which charger I use.
I contacted Blu's support about this issue and they were extremely unhelpful. I asked if the phone supported mediatek PumpExpress+. I didn't get a straight answer, just a reply saying to only use the included charger. I asked if Blu is going to sell a compatible 9v charger for quick charging and they said no. I gave up at that point. Their support is pretty much useless. I like the phone otherwise though.

what are you using to read the charging volts/amps?
BLU cusomter service is probably the worst i have delt with in a while, and contacted the warrantu dept. They shipped out a 9v2a charger to(or so they said), it will be here friday. i will post my results.
you are the first person i heard that cant get a quick charge while using at least a 9v2acharger. maybe there is something wrong with your battery or charging port?
just installed Ampere to check the current. with crappy supplied BLU charger, it see 3.9v max and 1.2a max. Tried galaxy s4 charger which is also a 5v2a charger, results were almost identical; 4v max and 1.22a max

GrapeBandit said:
what are you using to read the charging volts/amps?
BLU cusomter service is probably the worst i have delt with in a while, and contacted the warrantu dept. They shipped out a 9v2a charger to(or so they said), it will be here friday. i will post my results.
you are the first person i heard that cant get a quick charge while using at least a 9v2acharger. maybe there is something wrong with your battery or charging port?
just installed Ampere to check the current. with crappy supplied BLU charger, it see 3.9v max and 1.2a max. Tried galaxy s4 charger which is also a 5v2a charger, results were almost identical; 4v max and 1.22a max
Click to expand...
Click to collapse
I used this this DROK usb watt meter. I don't trust ampere or any other app based measurements. Phones often have different charging profile depending if the phone screen is on or off in order to limit heat generation in the device. I've tried the Meizu charger with PE+ and a Qualcomm compatible QC 2.0 charger. Neither will charge the phone at 9v.
There was one other person on slickdeals who also could not get fast charging to work with a Meizu charger. I honestly don't think Blu enabled fast charging on this phone.
I would be super interested in your results with the charger furnished by Blu. Must've taken you quite a while to get them to agree to send you the charger. Props to your persistence!

GrapeBandit said:
BLU cusomter service is probably the worst i have delt with in a while, and contacted the warrantu dept. They shipped out a 9v2a charger to(or so they said), it will be here friday. i will post my results.
Click to expand...
Click to collapse
Did you end up getting the 9v charger from Blu yesterday? I'm really interested in your results.

sorry for the late reply. needless to say, the charger BLU sent was a 5v1a. i called them back and they said thats the only chargers they give through warranty, and that they dont know why in was told id be sent a quick charger.
i bought this, and still only see 4v and 1.2a while charging. obviously it is not enabled in the device. can we say false advertisement?
https://www.amazon.com/dp/B019GQ6S2C/ref=cm_sw_r_sms_apa_09krxbC05ZDXM
i am going to file a report with the FTC addressing this issue as it is illegal.

That's really unfortunate. Blu does supply a 9v/2a quick charger for the Pure XL phone. The Pure XL also has a Mediatek processor so if any charger from Blu could give the Vivo XL quick charging, that would be it. If you make enough trouble for them, they might send you the Pure XL charger! I agree that Blu's ad is extremely misleading. I like this phone otherwise, but Blu's customer service is pretty incompetent.

^the charger i bought from amazon is a 9v/2a, so using the charger from pure xl wont make any difference. quick charge is just not inside the device, guess BLU realized at some point before production began that it would dip too much into their profits if selling the phone for $150usd.

GrapeBandit said:
^the charger i bought from amazon is a 9v/2a, so using the charger from pure xl wont make any difference. quick charge is just not inside the device, guess BLU realized at some point before production began that it would dip too much into their profits if selling the phone for $150usd.
Click to expand...
Click to collapse
The charger you got from amazon is 9v/2a, but it's based on Qualcomm's Quick Charge technology. it'll only work on phones with Qualcomm processors that support the Quick Charge standard.
Vivo XL uses a Mediatek processor. So Qualcomm Quick Charge chargers won't work on the Vivo XL. You'll need a charger that supports Mediatek's 'Pump Express' technology. http://www.mediatek.com/en/features/power-management/pump-express/

you cant buy that charger anywhere though, so i cant even test it. also, someone on another forum said they got a blu device to accecpt the qualcomm charger, actually, it was a youtube video.

Very slow charging (measured with meter)

Model: CLT-AL00 (Dual SIM)
Build: 8.1.0.131 (C675)
Location: India
Chargers tested: Original box charger, Tronsmart Quick Charge 2.0 charger, Choetech Quick Charge 2.0 power bank
How is the charging speed for you guys? It has been over 24 hours since I received this phone and charging is too slow for me.
First of all Huawei cheated us Indians by not bundling supercharger and choosing to include a 9V/2A charger instead. It would have been great if the phone charged at least to that spec.
In 30 minutes, my P20 Pro charges about 14% (i.e. from 4% to 18%). And I wasn't using the phone. I first tried the charger/cable that came with it (upon which the phone displays fast charging) then my old Tronsmart Quick Charge 2.0 charger and finally Choetech QC 2.0 16000mah power bank. Although Huawei does not use QC, it should at least charge on 5V/2A speeds.
I used a USB meter to measure the output and was surprised that the phone uses only 5V/0.8A regardless of whether the screen is on or off. My S8+ uses 8.8V/1.6A (with Tronsmart and Choetech) while the screen is off and 5V/1.5A when the screen is on. At 5V/0.8A speed it could take 3 or 4 hours to charge the massive 4000mah battery.
What about you guys? I am wondering if I have a defective hardware and should replace within the window.
Also considering the phone supposedly uses "AI" everywhere to learn your patterns, did the charging speed improve over time or has it been the same since day 1?

You will only get fast charging with the 1st party charger. Its proprietary technology.
Sent from my CLT-L29 using Tapatalk

Yep, Supercharger needed. Mine will pull 2A on an Anker QuickCharge 2.0 charger using the original USB cable though.

orangecroc said:
You will only get fast charging with the 1st party charger. Its proprietary technology.
Sent from my CLT-L29 using Tapatalk
Click to expand...
Click to collapse
I understand that. But even 1st party charger is only drawing 5V/0.8A power, just like a 3rd party charger.
Any 2A charger (1st party or not) should be capable of providing at least 5V/1.8A power. But here it isn't, which is why I am wondering if this is an issue with the my particular phone itself.

Does it have this written on the 1st party charger?
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Sent from my CLT-L29 using Tapatalk

orangecroc said:
Does it have this written on the 1st party charger? View attachment 4503211
Sent from my CLT-L29 using Tapatalk
Click to expand...
Click to collapse
We don't get supercharger here in India. We get a 2A fast charger.

you will have to buy a supercharger from ebay.in. I just bought one for INR 1800

Quick charge should still give you at least 40% in 30 minutes. Your phone seems faulty to me

Hi, I have P20 Pro from over a week. I replaced Mate 10 Pro with P20 Pro and I don't understand why P20 Pro charges slower in my car than Mate did.
Mate was charge ~10-15% in 40-60 minutes when connected to car. P20Pro is charging ~2-3% at the same time.
I don't uderstand why. Both of phones have the same battery, the same CPU. That difference with charging exists only in car.
Thanks in advance for any solutions

pratik_193 said:
you will have to buy a supercharger from ebay.in. I just bought one for INR 1800
Click to expand...
Click to collapse
Please give the link to your purchase. And is it working as expected?

halleyrokz said:
Please give the link to your purchase. And is it working as expected?
Click to expand...
Click to collapse
https://www.ebay.in/itm/Huawei-Supe...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
Working fine since last 1 month..

pratik_193 said:
you will have to buy a supercharger from ebay.in. I just bought one for INR 1800
Click to expand...
Click to collapse
pratik_193 said:
https://www.ebay.in/itm/Huawei-Supe...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
Working fine since last 1 month..
Click to expand...
Click to collapse
Thank you...I presume while charging with it, the lock screen shows supercharger

halleyrokz said:
Thank you...I presume while charging with it, the lock screen shows supercharger
Click to expand...
Click to collapse
yes, shows supercharging on lock screen

To know 2 ways how much Ampere it charges, then download app called Ampere it will tell you how much Ampere each charger gives. With SuperCharger it should say around 4500-4800Ampere.
The second way to know it's using supercharge is that it has 2 lightning icons connected in battery icon and that it says supercharge.

I've noticed that even if you have a supercharger, you need to have a proprietary cable AS WELL to get supercharge.
Otherwise you get bog standard charging, which takes about 2 hours to charge (I think. Never charge my phone from 0)

Question Slow charging on S21 Ultra

Hey folks!
I have orignal Samsung 45W charger (listed on their official site) and when I use it to charge my Galaxy S21 Ultra, it takes longer than what I have seen in some Youtube videos.
Mostly it takes the phone around 70 minutes to charge from 0 to 100.
But when i charge it using my Samsung 45W charger, i takes around 100 minutes ( 1 Hour 40 mins) to full charge.
I have tried charging the phone while the phone is turned OFF as well when it is ON, but i don't get the charging time around 70 minutes.
The fun thing is that if I plug the charger around 10-15%, it shows me that it will be charged completely in around 50mins to 1 hour, but as the time passes on, that figure increases and I get a completely charged phone in around 1 hour 40 minutes.
If anyone has a solution, please let me know.
The 45W Samsung charger says that it outputs as much current as required by the device.

The S21 series don't utilise 45w do you will only get 25w of power

I have been at 1% and it said it would take 1 hour and 7 mins to fully charge

That's normal

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Im assuming you got these on?
If so, try a cable change.
If cable change doesn't fix it, try factory reset.
If it doesn't work, contact Samsung

Da1e7150 said:
The S21 series don't utilise 45w do you will only get 25w of power
Click to expand...
Click to collapse
I know that, but let's say it utilizes 25W, so it should fully charge the phone in 70 minutes but as i said in the orignal post, it takes around 100 minutes.
Moreover, the estimate that the phone shows, it does not stick to that

Da1e7150 said:
That's normal
Click to expand...
Click to collapse
but why other S21 ultra charges faster?

mpore14 said:
View attachment 5295125
Im assuming you got these on?
If so, try a cable change.
If cable change doesn't fix it, try factory reset.
If it doesn't work, contact Samsung
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Superfast charging and fast charging is on, shouldn't it be?

ankitsxperiago said:
I know that, but let's say it utilizes 25W, so it should fully charge the phone in 70 minutes but as i said in the orignal post, it takes around 100 minutes.
Moreover, the estimate that the phone shows, it does not stick to that
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It will be to do with your actual house/flat power supply it might not be giving the full wattage needed I really wouldn't worry

Da1e7150 said:
It will be to do with your actual house/flat power supply it might not be giving the full wattage needed I really wouldn't worry
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I don't think that's the problem

ankitsxperiago said:
but why other S21 ultra charges faster?
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Temperature is a factor.
Charging is an electrochemical reaction that needs heat.
Fast charging will not engage if the start temp is too low. Best start temperature is at least 85°F.
90F is better. Keep battery below 100F while charging, if it exceeds 101-102F it will disengage or stop charging entirely.
After reaching 70-75% or so it will ramp down.
At 90% it greatly ramps back protect the battery.
Try to limit charging to 30-90%; 40-72% being ideal for charge speed and battery longevity.
Avoid going below 20% as it greatly time. battery stress and provides little usable time.
Avoid charging of any kind if battery temp is below 72F as it can cause Li plating which permanently degrades the cell.
Drop in battery capacity and erratic fast charging can indicate a battery failure. This can happen at anytime but becomes more likely as the battery ages.
☠Any signs of cover bulging means the battery must be replaced asap. It rests on the display and can damage it, or worse...☠

Same here. My S21 Ultra (exynos) takes over 100 minutes to fully charge. Should I be contacting Samsung?

iampunX said:
Same here. My S21 Ultra (exynos) takes over 100 minutes to fully charge. Should I be contacting Samsung?
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Use a 25w charger it's known the 45w charger charges the phone slower

Da1e7150 said:
Use a 25w charger it's known the 45w charger charges the phone slower
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I've never seen that stated before.
Source?

It's on Samsung's own forums

Da1e7150 said:
It's on Samsung's own forums
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Could be a lot of reasons for that including temperature. The 45 w brick charge rate isn't that much greater anyway.
I get best fast charging results when the start temp is close to 90F on my N10+.
At a 72F start temp it's possible fast charging won't engage at all.
If fast charging fails to engage because of low temperature at the beginning of the charge cycle it will revert to slow charging for that entire charge cycle regardless if the temperature rises into the optimum range during the charge cycle.

Guys why are you so obsessed with charging the phone super fast?
It is better to let it take it's time, it will let the battery stay healthy for longer. Realistically if you have all the fast charging options OFF, and left your phone to charge at night, this would be the best scenario. The device can easily last a full day anyway.

babyboy3265 said:
Guys why are you so obsessed with charging the phone super fast?
It is better to let it take it's time, it will let the battery stay healthy for longer. Realistically if you have all the fast charging options OFF, and left your phone to charge at night, this would be the best scenario. The device can easily last a full day anyway.
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Charging overnight or to 100% is the worst way to charge an Li. Fast charging is really useful for the frequent midrange (40-70%) charging Li's prefer.
10 minutes vs 20 minutes for 20%.
If you don't mind the extra time then midrange slow charging is the optimum way to go.
Always keep battery temperature above 80°F and under 100F to avoid the possibility of the Li plating phenomenon though.

blackhawk said:
Charging overnight or to 100% is the worst way to charge an Li. Fast charging is really useful for the frequent midrange (40-70%) charging Li's prefer.
10 minutes vs 20 minutes for 20%.
If you don't mind the extra time then midrange slow charging is the optimum way to go.
Always keep battery temperature above 80°F and under 100F to avoid the possibility of the Li plating phenomenon though.
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You may have a point. Over the years I have seen various sources talk about charging fast and slow and also indeed charging to 100 is not the ultimate scenario. The ultimate one is to charge it to about 90% and the phone would stop charging automatically. It is actually possible and adjustable with a Magisk script as I recall.
In the long term though, from my personal experience I have discovered that charging your phone at night slowly is best all-around scenario. For example, you need 2 good years to lose 10-20% of battery capacity. And realistically it is unlikely that you would use your phone for more than 3 years as you would most likely upgrade. So having to go trough the constant hustle of quick charging it and stopping it on time and etc, is just not worth it.
And if you do decide to use your phone for over 3 years, your phones waterproofness would gone anw, so you might as well just pop a new battery...

babyboy3265 said:
You may have a point. Over the years I have seen various sources talk about charging fast and slow and also indeed charging to 100 is not the ultimate scenario. The ultimate one is to charge it to about 90% and the phone would stop charging automatically. It is actually possible and adjustable with a Magisk script as I recall.
In the long term though, from my personal experience I have discovered that charging your phone at night slowly is best all-around scenario. For example, you need 2 good years to lose 10-20% of battery capacity. And realistically it is unlikely that you would use your phone for more than 3 years as you would most likely upgrade. So having to go trough the constant hustle of quick charging it and stopping it on time and etc, is just not worth it.
And if you do decide to use your phone for over 3 years, your phones waterproofness would gone anw, so you might as well just pop a new battery...
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My normal top off point is 65-75%, most times after 72-80% fast charging has ramped back a lot. What's nice about midrange charging is you take a 10 minute break and are good for another 2 hours.
On my Note 10+ I needed to replace the battery at 1.5 year mark. It saw some hot weather abuse and cold charging etc, etc, etc.
It swelled and had to proform an emergency batterydictomy
Now that I know how to change it out it's no big deal... and charging protocols/battery longevity are sort of a game.
Lol, I ordered an extra charging port PCB too