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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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anybody knows where to buy this ?

[Q] Slow charging on device

Hey,
I recently bought a used Xperia Z1 and everything is great apart from the charging. It is horrendously slow whilst charging.
I've tried charging from my home PC, office PC, two seperate AC (wall) outlets and it makes no difference. Out of curiosity I downloaded 'Battery Widget Reborn' and it showed that my device will charge 1% every 6 or so minutes and will take 12 hours for a full charge to 100%.
My Nexus 4 charged to 100% within two hours usually so this leads me to believe that something is wrong with the phone.
Normally I would go consider the battery as the main culprit but after finally getting to 100% it doesn't seem to drain particularly quickly as you would probably expect from a faulty battery. It would be nice to compare these statistics to the rest of you to see how abnormal this is.
This moves me on to the the USB slot on the device - is it possible that it is faulty and therefore pulling very little power (barely enough to charge the device whilst using moderately)?
-
If this is the case then has anyone had any experience with getting their Z1 USB slot repaired or should I just try to take the device back and get a different Z1 from somewhere else?
Does anyone have any other suggestions for me to try? There is a Sony store in my city so I could perhaps go to them for advice (as long as they don't empty my wallet)...
Thanks!

I had same experience with not original Magnetic Cable. All what is not Genuine can compromise the functionality of your device. Check first the wall charger, it have to be 0.5VDC 1500mA. then check the cable or try different one. I will recommend the Original Dock DK31. In 2 hours mine is fully charged with that one.

im not sure but mine charged extremely slow aswell but it has gotten alot faster
im assumings its some kind of break in period or something

Is the usb cable original? Or else you could get the charging dock
Sent from my Xperia Z1

ragingbull said:
Hey,
I recently bought a used Xperia Z1 and everything is great apart from the charging. It is horrendously slow whilst charging.
I've tried charging from my home PC, office PC, two seperate AC (wall) outlets and it makes no difference. Out of curiosity I downloaded 'Battery Widget Reborn' and it showed that my device will charge 1% every 6 or so minutes and will take 12 hours for a full charge to 100%.
My Nexus 4 charged to 100% within two hours usually so this leads me to believe that something is wrong with the phone.
Normally I would go consider the battery as the main culprit but after finally getting to 100% it doesn't seem to drain particularly quickly as you would probably expect from a faulty battery. It would be nice to compare these statistics to the rest of you to see how abnormal this is.
This moves me on to the the USB slot on the device - is it possible that it is faulty and therefore pulling very little power (barely enough to charge the device whilst using moderately)?
-
If this is the case then has anyone had any experience with getting their Z1 USB slot repaired or should I just try to take the device back and get a different Z1 from somewhere else?
Does anyone have any other suggestions for me to try? There is a Sony store in my city so I could perhaps go to them for advice (as long as they don't empty my wallet)...
Thanks!
Click to expand...
Click to collapse
Hi,
The phone usually takes about 3 hours to charge completely in my case, using the standard sony adapter given with the phone, probably i would suggest if you could borrow some other charger and try charging so that you can isolate the issue.(Please note the rating of the charger which you intend to charge for testing)
Also i noticed that the standard charger given by sony is 1.5A rating, so i usually charge with the charger given for my samsung tab 2 which has a higher rating and this one does a super charge in nearly 2 hours or less.
Thanks
Santosh

santro652 said:
Hi,
The phone usually takes about 3 hours to charge completely in my case, using the standard sony adapter given with the phone, probably i would suggest if you could borrow some other charger and try charging so that you can isolate the issue.(Please note the rating of the charger which you intend to charge for testing)
Also i noticed that the standard charger given by sony is 1.5A rating, so i usually charge with the charger given for my samsung tab 2 which has a higher rating and this one does a super charge in nearly 2 hours or less.
Thanks
Santosh
Click to expand...
Click to collapse
i have same problem using micro usb for charging so slow.
now i'm using magnetic cable and use 800mA charger, i'm not using 1,5A sony charger because it make my mobile so hot.

Takes around 3 hours using Sony's original magnetic charger

mm79k said:
Takes around 3 hours using Sony's original magnetic charger
Click to expand...
Click to collapse
Not for me. I am having slow charging as well. Using official Sony magnetic cable I have tried a couple different power adapters from Sony including the EP880 and even over night it won't charge it completely. Last night I plugged it in with about 37% left...woke up this morning after about 7.5 hours and it was only at 78%. Have to plug it in via USB to get any decent charging speed.

Spectre51 said:
Not for me. I am having slow charging as well. Using official Sony magnetic cable I have tried a couple different power adapters from Sony including the EP880 and even over night it won't charge it completely. Last night I plugged it in with about 37% left...woke up this morning after about 7.5 hours and it was only at 78%. Have to plug it in via USB to get any decent charging speed.
Click to expand...
Click to collapse
Then I asking my self what is different in the original Dock DK31 as it charge my phone very well.
I think that you think you have original one magnetic cable but it's not..

eclyptos said:
Then I asking my self what is different in the original Dock DK31 as it charge my phone very well.
I think that you think you have original one magnetic cable but it's not..
Click to expand...
Click to collapse
I think I would know if I had the original one or not. It came with my phone and is Sony branded.
Sent from my Surface with Windows 8 Pro using Tapatalk

Charges an hour and 30mns for me everything is original
Ps. This is a used phone got it from swappa
Sent from my C6906 using XDA Premium 4 mobile app

uhuhuh
mine took 5 hours from 0% ~> 24%

My z1 charges fine if i dont let it get below 40%. If i let the battery drop down to around 10% it takes a long time to reach 40% and then charges normally. It doesn't matter what method i use for charging it still charges the same, one observation i did make though is that when charging from a low percentage up to around 30% the phone gets very hot so it might be a good idea if we don't cycle our phones batteries so low?

I bought this phone in september this year .. the first time I charge it only takes 3 hours to full from 18% ~ 100% .. but by now it takes 24 hours for the full amount of 8% ~ 100% (︶︹︺)

solution?
Spectre51 said:
Not for me. I am having slow charging as well. Using official Sony magnetic cable I have tried a couple different power adapters from Sony including the EP880 and even over night it won't charge it completely. Last night I plugged it in with about 37% left...woke up this morning after about 7.5 hours and it was only at 78%. Have to plug it in via USB to get any decent charging speed.
Click to expand...
Click to collapse
Same problem here. Have you solved this problem? Thanks in advance.

fmode68 said:
Same problem here. Have you solved this problem? Thanks in advance.
Click to expand...
Click to collapse
Don't have the Z1 anymore but I never did figure it out. Was very sporadic when it happened.
Sent from my Xperia Z2

If you are really curious maybe grab one of these:
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Shows Volts and Ampere.
They are sold as "usb meter" in eBay/aliexpress for as low as $1.70 from China and actually work quite well.
Helps to easily spot a cheap cables(low ampere) or chargers(lots of varying voltage) that should go to the trash.

I updated to lollipop and this is happening to me now.
Before, I charge so fast, now on lollipop any charger I use is so slow even when turned off
it will take 7 hours to finish charging to 100%

I have the same problem too.. Using original charger and adapter. It took more than an hour to charge from 15%-25% even when the phone is switched off!

I would blame wake locks, cpu activity and network activity.
These phones are fast so fast they wreck the battery.
Try disabling the network or switching to 3G/2G
Have a look for any background apps eating juice.

[REVIEW] Tenergy and Powermod Quick Charge 2.0 Chargers

A review for the following products:
Tenergy AC Wall Fast Charger with Qualcomm® Quick Charge™ 2.0 technology
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Powermod Quick Charge 2.0 Certified D/C In-Vehicle Car USB Charger
Both chargers are as fast as advertised over my stock HTC A/C charger that came with the phone and my Rockfish car charger I've been using since my HTC Vivid days.
They both came in nice retail packaging and the Powermod car charger comes with a nice (but short) USB cable. The Tenergy wall charger has an LED on it and it is blue when an non QC 2.0 device is plugged in and turns green when a QC 2.0 compliant device is plugged in. Unfortunately the car charger doesn't have this feature. It has a blue light that rings the device but only indicates that it has power. It doesn't change color when a QC 2.0 compliant device is plugged in.
I have found that both of these chargers will not charge my Asus Transformer TF201. I find this strange because I've used other USB style wall chargers with my Asus data cable (the transformer has a proprietary changing port connector) that worked just fine. Still doing research on that one but I'll not be using these to charge my tablet. I just wanted to point this out as some of these QC manufactures say they are backwards compatible with most devices. YMMV.
I've been using both for about 3 weeks and am very happy with the performance of both units.
Below is data from a series of comparison tests to show how much faster the Qualcomm QC 2.0 chargers are over stock type chargers. The data in the HTC vs. Tenergy charger is an average of 4 charges per device. The HTC vs. Tenergy temperature comparison chart is through one full charge cycle from below 20% to 100%. As you can see the QC 2.0 does charge at a higher temperature. I also took the temperature while charging on QC 2.0 with my DotView case on and at 50% the temperature on the back of the case was 91.4 F. I have taken my phone temperature after heavy gaming and the back has actually gotten hotter just playing games than at any time during the charging cycle with QC2.0. I used a IR handheld thermogun we use at work.
The Powermod and Rockfish data is from my commute to and from work that is on average 30 minutes. There are 4 charge cycles for each devise over a 30 minute period.
Conclusion:
The performance of both units is great compared to stock. Since I can already get a full day worth of battery with between 15 and 20% left after a typical day both these chargers just make life easier. If you have to go somewhere but still have 30 minutes before you leave you can "top off" your battery before leaving if you are low. Example, you realize you have less than 10% battery but have some time before you have to leave. Plug you QC 2.0 charger in and get to at least 50% in that time. I feel much better walking out the door with 50% than 10%. With the car charger you can keep your battery "topped off" between destinations. Time will tell on the longevity of the phone battery and the chargers themselves.
I hope you've found this helpful.
I recommend both of these units.:good:

Images do not work here...

OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!

waynerbbx said:
OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!
Click to expand...
Click to collapse
I'm pretty sure this and this is what OP has in mind, but I could be wrong.

Actually I'm not sure why my pictures are not showing up. I have my pictures set to public. I'll move them and try another location as soon as I get to work.
I see the pictures.........anyone else see them?

Pictures are working now. And holy cow..that's some impressive work Thanks for taking the time to test it all!

Thanks for the input.
I have the Tenergy wall charger and I have been pleased with the results. I will probably buy the same car charger you have next.

Glad everyone seeing the data now. I put this together because of all the questions on QC 2.0 that past few months.
BTW - I do crap like this all the time at work so it really wasn't that much work other than gathering the data. The charts etc took less than an hour to create after I had all the data I wanted.

Cheers mate!
Great data indeed
Sent using Tapatalk

abyssis said:
I'm pretty sure this and this is what OP has in mind, but I could be wrong.
Click to expand...
Click to collapse
Interesting! Thank you for sharing the links!

Thanks for your input M8!

Nice review,thanks!

I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?

Phrostbite said:
I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?
Click to expand...
Click to collapse
The car charger doesn't indicate if it's charging at QC 2.0 specs. Only the wall charger does that. The only way you can tell that the car charger is doing it's QC 2.0 is by the battery level or using an inline USB current meter that will show the charge rate.
Sorry for the confusion, I'll update my review.

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.

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
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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
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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
Click to expand...
Click to collapse
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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Click to collapse
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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Click to collapse
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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Click to collapse
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