So, like most S8 owners herein, my device use to fast charge when I first got it....or so said the description in the notification bar. Recently, in the past few weeks, I noticed that it now only said cable charging. I was pretty irritated because fast charging is really desirable. Being able to top up rather quickly removes any concerns I have about battery life on the device, though admittedly it generally lasts me 24+ hours.
Anyway, I checked around in the forums and realized that many owners had this same issue and nobody seemed to have resolved it. Yes, some said use the original charger (I did, to no avail). Others said to confirm that fast charging was on (I did that also).
Then, I remembered reading an article about how the S8 doesn't actually fast charge when the screen is on. So, I wondered if maybe that's why I only saw "cable charging"...because the screen was on to see it.
As an experiment, I installed Ampere and left it running. Of course, while the screen was on, charging only measured about 1000-1100 mA. Yup, that's slow and confirmed my worries.
But then, what I did was to turn off the screen and wait a few minutes, while leaving Ampere running in order to see the max value. Surprisingly, and refreshingly, when I unlocked the device and checked the max value observed in Ampere, the S8 had registered a value of 2520 mA!
So, I think what's happening is that Samsung eliminated the fast charge notification because people were complaining that it wasn't fast charging when the screen was on. However, when the screen is off, it actually increases the charge. Alas, without the screen on, one cannot observe a fast charging notification.
At the very least now, I feel relieved to know that fast charge appears to be working. I'd be curious to hear what the rest of you think. Cheers.
This makes sense but my S8 still charges slowly even with the screen off. I'll try your test and see what happens. If I want it to charge faster, I turn the phone off completely. This very reason is why I ditched my samsung notebook. There was a system upgrade that disabled the ability of the device to charge while on. So annoying.
As I understand, that S8 enables fast charging when screen is off. With the screen on, it is slower.
VRStitchWitch said:
This makes sense but my S8 still charges slowly even with the screen off. I'll try your test and see what happens. If I want it to charge faster, I turn the phone off completely. This very reason is why I ditched my samsung notebook. There was a system upgrade that disabled the ability of the device to charge while on. So annoying.
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Wow that would be really annoying on a laptop. I know they're stepping up battery safety but that's a step too far!
Yes from what I've read fast charging only works with the screen off, this is to limit the phone from getting too hot while fast charging and using your phone simultaneously.
As nice as the S8 is I really think everyone should just use oneplus`s dash charge. It's so great, filling the battery in 50 minutes... Quick charge is way inferior.
SecrtAgentMan said:
Yes from what I've read fast charging only works with the screen off, this is to limit the phone from getting too hot while fast charging and using your phone simultaneously.
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I think you hit the nail on the head. It seems that Samsung remains quite stung but the blowback from the battery issues surrounding the Note last year so they are taking NO chances with the S8.
Related
hey guys, i was wondering if you've noticed that it takes the battery an extremely long time to charge to 100% through the AC adaptor.
i actually don't have a i9000, i'm on the US att variant captivate. i'm trying to figure out if this is a model specific problem (ie. just for us att users) or is it for all of the galaxy s phones.
while the galaxy s does have an extremely large battery, it shouldn't take 6 minutes to charge only 1% of battery. i've noticed that charging my captivate for 2 hours only nets a 40-50% charge, which is far lower than what i had previously experienced on my iphone and sony ericsson phones.
in my opinion, this is the biggest problem of my phone especially since i'm always on the go. i may have to switch phones since i always don't have the luxury of charging for 7-8 hours at a time.
thanks.
Yea the charge speed is very slow while the phone is turned ON.
- However when its turned off it charges really fast, like 30 min for full battery.
Kjeldmis said:
Yea the charge speed is very slow while the phone is turned ON.
- However when its turned off it charges really fast, like 30 min for full battery.
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I guess I had the same issue, slow charging lateron when the battery fully drained it refused to charge and hence cannot start. I tried via usb cable when I panicked something went wrong so I hard reset my phone to see if it is some software issue. It happened once again phone cannot be switched on since it cannot recharge via adapter, so took it to the service center they tested it and told me that the problem is with the AC adapter.
Now the phone is with me, I am still monitoring it to see and confirm once again that charging via usb cable is not an issue.
The note is a disaster for me when it comes to charging.
If your battery is low and you start charging it but using it at the same time, it doesn't get worse, but it doesn't get better either i.e. actually charge the thing, it just holds its own.
I have got to say I am not impressed with this!
I am not facing such problems. Charging takes pretty long yes but not as bad as you said. A larger battery will of course need a longer time to charge. But I wonder sometimes too if it's the battery problem or the charger output problem and if there's a way to speed up the process.
Jasonchewy91 said:
I am not facing such problems. Charging takes pretty long yes but not as bad as you said. A larger battery will of course need a longer time to charge. But I wonder sometimes too if it's the battery problem or the charger output problem and if there's a way to speed up the process.
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I think it is more to do with the actual charger, seems like a trickle charge or something.
Yes if charging and using at the same time you would not expect it to charge as quick, but mine doesnt really charge at all, just stays the same.
My acer iconia will charge like lightning even when i am using it, smaller battery or not it still charges!
This was one of the things i was looking forward to with the note, but this slow charge seems to make it more or less the same as what I am used to.
I have the usb plug which comes with the kindle, might it do a better job?
If anyone manages to find a proprietary charger which can produce better charging I will like to know too
That is common the charging is very slow and if you are playing HD games then the charging is almost in negative. May be its because of the voltage of the charger inputs and it is to low. Samsung must have done it for a reason may be its because of the proprietry port or the battery itself we do not know but we need to live it
Agreed, charging this thing takes a long time. Keep in mind that the battery is 7000 mAh and the charger is most likely a 2 amp charger, pegging the charge time at around 4 hours with no other losses. So if you're using it, it should take even longer.
MJ-12 said:
The note is a disaster for me when it comes to charging.
If your battery is low and you start charging it but using it at the same time, it doesn't get worse, but it doesn't get better either i.e. actually charge the thing, it just holds its own.
I have got to say I am not impressed with this!
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No such issue here. I charge to full capacity while using all the time.
I get what he's saying. Because it draws so much power when you're using it; having it charging at the same time doesn't move the needle much. For example, if you're watching a movie while it's charging you'll probably be at the same point battery wise when the movies over. People complain about this all the time when their using their devices as a GPS. In some cases not only doesn't it charge but it actually continues to drain so you're worse off from where you started. We're using 21st century toys powered by 20th century battery technology.
BarryH_GEG said:
I get what he's saying. Because it draws so much power when you're using it; having it charging at the same time doesn't move the needle much. For example, if you're watching a movie while it's charging you'll probably be at the same point battery wise when the movies over. People complain about this all the time when their using their devices as a GPS. In some cases not only doesn't it charge but it actually continues to drain so you're worse off from where you started. We're using 21st century toys powered by 20th century battery technology.
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This is a better way of saying what I mean, thank you.
I also have to say one thing I do not like doing is turning the screen brightness down. After all we all get these things as they look so good, so I am not going to make it look worse when I am using it, what would be the point in that? Its a bit like saying yeah my battery life is 14 days but actually it is on standby for that time lol...
Anyway, I still believe it should be better and the primary cause is the weak charger for what ever reason sammy decided to make it that way, but its not a good thing.
It seems like I remember someone recommending a charger that was more powerful so the note would charge faster. Can anyone confirm this?
What a fail thread. If you know ANYTHING about charging, you would know why this happens and why this is NORMAL.
But why even search or educate oneself, let's post a thread on XDA and whine a bit.
It could be worse. It takes six hours to charge a N10.
I dont face this problem i charge mine when surfing the wep
On a slightly related side note, doesn't it suck that the brightness just turns down completely when the battery is low?
The zslower charge rate protects the batteries life ,reduces the possibilty of heat and battery damage trickling insures a full charge
if you don't want your screen to dim don't use the power saving setting.
Sent using Tapatalk2 from my Note 10.1; the choice of Royalty
For all those facing the slight unresponsive screen please change the source of power, I had mine connected to UPS power supply as soon as I changed and connected it direclty the problem was gone.
Even if you read the user manual of Samsung Note its says thats one of the reasons
How Manhattan hours per day do you use the note? With a 10hrs battery life I find an overnight charge is sufficient
Sent from my GT-N8010 using Tapatalk HD
Szadzik said:
What a fail thread. If you know ANYTHING about charging, you would know why this happens and why this is NORMAL.
But why even search or educate oneself, let's post a thread on XDA and whine a bit.
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Wow! many friends?
Anyway moving on.. so i just got my note 10.1 about a week ago, loving it but saw that while plugged in it was not charging at all while i was using the tablet and never quite getting to 100% overnight. By not charging while using, i mean to say that it was actually discharging. Yes of course i am using the stock charger and cable.. and even stock note.
so just tried something silly. Unplugged and plugged the usb from the block repeatedly about 5 times. Now its not only recognizing and charging, but charging relatively quickly even while using. To test, i unplugged for about 20 min and plugged back in. Same great results.
Just thought i would share instead of hoarding my new found knowledge like others..
Quick update: it charged about 10% in 20 min.. Nice
I don't charge mine - I paid cash for it
Is anybody having slow charging problems when the screen is still on?
A couple of days ago it took over an hour to charge from 5% to 25%, all I was doing was social media browsing. As soon as I put the phone down with the screen off the % jumped to 85% in around 30 minutes. I took my V20 back to the LG shop and in the end they replaced the unit as they could see the problem but was unsure what it was. They then tested the new one just before I was leaving and it was again taking nearly 90 seconds or more to charge 1% on the new device straight out the box. They went and give me a new battery and said to test it out for a few days before going back to them. It was there first complaint about the charging speed.
Again, while not using the device the charging is quick on the new device, but slow when the screen is on and in use. I will give it a couple of days and take some screenshots of the battery stats if it continue. It did say on my old device while connected that it was 5hr 45min until fully charged which is obviously wrong.
No weird apps on there that could be causing it as far as I'm aware, unless it's an LG pre-loaded one.
Strange that the new phone is doing the same.
Sounds like that's how the V20 manages battery charging. It charges faster with the screen off. And a lot faster with the whole thing off.
Same thing happens to me. When using Waze app. Even if it says fast charging, its noticeably slower than when i had my note 5 or 7.
Maybe its "heat management"? Im just guessing. Maybe to prevent it from heating fast with the screen on + quick charge
I think it's QC 3.0 - it does it so as to not overheat the battery. I have it happen on mine too when using a QC 3.0 charger.
When using a QC 2.0 charger(Samsung charger) it chargers a bit faster while screen on but the phone starts to get noticeably warm.
It is probably a thermal management thing. My N6 Shamu got very warm on QC2 with screen on.
The v10 does the same thing it's probably because the screen is the biggest battery drain on the phone so using it obviously would cause a significant charge delay.
Sent from my LG-H901 using XDA-Developers mobile app
Normal.
Hmm. I notice charging is slower when it's the temperature is higher.
I just bought a Spigen Rugged Armour case and I think it's trapping heat during usage. And when I start charging, it's not as quick as I had hoped.
I'm going to observe a little more.
Alright. I've done a few days of observations. It definitely charges a lot slower when the screen is on. I used the Ampere app and it charges around 900mAh max, screen on.
When it's off, it averages around 2800mAh, depending on temperature too. Once it hits close to 40 Celsius, it drops to 2000mAh or lower.
With the phone powered down, it charges faster than just screen off. How much faster, I am unable to measure without using some special hardware.
Overall, I'm quite pleased with the charging performance.
Turn your screen brightness down. Also I noticed restarting the phone helps with it to charge faster. Could just be a glitch in charging software
Sent from my LG-H910 using Tapatalk
I have the feeling my s8 doesnt really fast recharge even if it's enabled (i'm on 2nd charge now)... how long does it usually take you guys to charge it full when its very low, around 5%? And how long does it say it takes on the notification? Thanks!
About 1h50 or something with normal charge, not fast charge.
Duskfall89 said:
About 1h50 or something with normal charge, not fast charge.
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Mine definately took longer to charge than that the 2nd time (the first one i was asleep so i dont know) and with fast charge. Does it matter which side you plug in the cable or it's the same? I'm getting worried.
The side of the cable does not matter. I normally charge my phone when it's about 15% and with normal charge it takes around 1h40. Next time I charge it around 5% I will check but I think it's about 1h50 to 2h. My S7 was definitely faster in charging.
Takes about 90 minutes with fast charge
Around an hour and 20-30 minutes, a bit slower when I'm using wireless fast charging.
Did you notice a substantial difference between normal charge and fast charge? Lat time I checked it was about 10 minutes difference until full charge. I expected more, it was much better on the S7.
I think that fast charging got capped by samsung after all the note 7 exploding battery horror stories. And it got capped at 2.45amp fast wired charging and around 1.35 with fast wireless charging since the nougat update on the galaxy s7. when it was around 2.8 fast wired and 1.8 fast wireless charging on MM
Beside the charging rate cap, the fone is much cooler while fast charging now as it used to get crazy hot reaching temps above 42c while now it never gets over 36.smthing.
So while its slower i guess its a much better bet for the battery health and your safety.
Normal wired charging didnt change between MM and nougat and its around 1.7~1.8amp
These are my findings using the s7 and s8 exynos international versions and the statments above are purely my own opinion and experience which could be different for everyone.
I noticed that mine never goes over 1060ma while charging using Ampere. It takes about 1 hour 40 minutes to "fast charge" but it is cooler than any other phone I've ever had while charging.
The sad thing is that it REALLY takes longer if you are using the phone, like barely increasing its %. I even tried changing cables, chargers and places but now I know I'm not alone and this is how it works.
I have an Exynos.
pakitos said:
I noticed that mine never goes over 1060ma while charging using Ampere. It takes about 1 hour 40 minutes to "fast charge" but it is cooler than any other phone I've ever had while charging.
The sad thing is that it REALLY takes longer if you are using the phone, like barely increasing its %. I even tried changing cables, chargers and places but now I know I'm not alone and this is how it works.
I have an Exynos.
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IMO ampere is crap and slow to report, you need an app that can report as fast as cpufloat. As once you turn on the screen the charging rate will default to ~1amp regardless of the charging mode your using and thats when ampere starts to measure.
Use cpu float for info at glance
Or
Use accubattery to even help you distnguish which charging cables your using gives you the best charging rate.
Hope this helps
Vcaddy said:
IMO ampere is crap and slow to report, you need an app that can report as fast as cpufloat. As once you turn on the screen the charging rate will default to ~1amp regardless of the charging mode your using and thats when ampere starts to measure.
Use cpu float for info at glance
Or
Use accubattery to even help you distnguish which charging cables your using gives you the best charging rate.
Hope this helps
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Back when I had my Galaxy S4 I used "CurrentWidget: Battery" which was really nice but is not working anymore so I installed Ampere.
I just tried both apps you mentioned and both gave me the 1050am right away. I'll try later on since I was at 90% and if I remember thats the point where it starts to throttle down the current.
I like the AccuBattery 80% cycle though, not sure I can really use it since I prefer to go with a full battery for the entire day.
Thank you!
Mine takes around 1hr 30 mins , The other night i turned fast charge off as i was going to leave it charge throughout the night but i actually forgot i had turned it off and had been charging for a few days with fast charge off..... surprisingly i noticed no difference! It still took around the same time to charge haha
Vcaddy said:
I think that fast charging got capped by samsung after all the note 7 exploding battery horror stories. And it got capped at 2.45amp fast wired charging and around 1.35 with fast wireless charging since the nougat update on the galaxy s7. when it was around 2.8 fast wired and 1.8 fast wireless charging on MM
Beside the charging rate cap, the fone is much cooler while fast charging now as it used to get crazy hot reaching temps above 42c while now it never gets over 36.smthing.
So while its slower i guess its a much better bet for the battery health and your safety.
Normal wired charging didnt change between MM and nougat and its around 1.7~1.8amp
These are my findings using the s7 and s8 exynos international versions and the statments above are purely my own opinion and experience which could be different for everyone.
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You hit it on the nose. They slowed it to avoid the whole exploding battery problems just to play it safe. Also why they didn't cram a bigger battery inside it to keep heat down.
They lost a lot of money because of that. The only thing that really saved them was that some iPhones were blowing up too
Sent from my Samsung SM-G950U using XDA Labs
Hi all!
Takes around 1 h 40 mins for a full charge. This is using the Fast Charger that comes in the box.
Duskfall89 said:
About 1h50 or something with normal charge, not fast charge.
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Don't you fast charge?
Sent from my SM-G955F using Tapatalk
thahim said:
Don't you fast charge?
Sent from my SM-G955F using Tapatalk
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I don't see a big difference between fast and normal charging. I only fast charge when I'm in a hurry.
Gesendet von meinem SM-G950F mit Tapatalk
pakitos said:
Back when I had my Galaxy S4 I used "CurrentWidget: Battery" which was really nice but is not working anymore so I installed Ampere.
I just tried both apps you mentioned and both gave me the 1050am right away. I'll try later on since I was at 90% and if I remember thats the point where it starts to throttle down the current.
I like the AccuBattery 80% cycle though, not sure I can really use it since I prefer to go with a full battery for the entire day.
Thank you!
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Click to collapse
Bear in mind that the charging rate will default to 1050ma whenever the screen is turned on no matter what charging mode your using.
To use my method in cpufloat app, open the app n keep it floating on your screen. Turn of the screen for awhile ( lets say 5 seconds) and n turn the screen back on. You will have a split second to read the current before it updates to the 1050ma. ( you can slow the update rate in the app settings btw.
Accubattery will have 2 readings, charging rate when screen on, charging rate with screen off.
Vcaddy said:
Bear in mind that the charging rate will default to 1050ma whenever the screen is turned on no matter what charging mode your using.
To use my method in cpufloat app, open the app n keep it floating on your screen. Turn of the screen for awhile ( lets say 5 seconds) and n turn the screen back on. You will have a split second to read the current before it updates to the 1050ma. ( you can slow the update rate in the app settings btw.
Accubattery will have 2 readings, charging rate when screen on, charging rate with screen off.
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Yup, I noticed that, thanks!
Accbattery showed me a maximum of 1156ma obviously it was charging with the screen off. From there my test starts since this charge was done using a multi-usb charger and had something else charging and wasn't using the original cable. We will see
Thanks once again!
Duskfall89 said:
I don't see a big difference between fast and normal charging. I only fast charge when I'm in a hurry.
Gesendet von meinem SM-G950F mit Tapatalk
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What other difference you want?
The charging issues on the Galaxy S8 seem to be widespread. I was hoping the most recent software update would help resolve these issues but it hasn't. Extremely slow charging (71% charged, 3 hrs 17 mins to 100%) and random connectivity (wireless charging paused) with Samsung's OEM wireless charger. What I've found with respect to the wireless issue, if I leave the phone on the charging pad after a few minutes it will eventually engage to a slow charge mode. Direct charging with the Samsung 2.0 Adaptive makes no difference, still a very slow charge. The normal Fast Charge Notification which should appear at the bottom of the display has never appeared and the tab remains grey in the Advanced Battery Settings even when enabled. Prior to purchasing the phone I had read and was advised by a Samsung tech the phone was suited to accept Qualcomm's 4+ Quick Charge. That seems unlikely at this point. Just got off a live chat with Samsung Support, not surprising the tech offered no solutions which I hadn't already experimented with. Booting up in Safe Mode to see if the app(s) were the problem, clearing system cache, app cache, using a variety of adaptives and cables, updating software, checking the C jack for connectivity. The S7 Edge I had previous to the S8+ was a great phone, no problems whatsoever. I honestly feel that Samsung is dragging their feet and haven't yet gotten their hands around these issues. Seriously, do they really want to experience another wide ranging battery concern? I think not. I can get a refund or replace the S8+ (SM-G955FD) but I'm wondering if the problems may be so widespread it could easily be an issue with the replacement phone. From the research I've done these issues are popping up on all models, regardless of the manufactures location.
There are so many options.
Superfast charging I find amazing. Quick plugin and the phone is back up to about 80% battery in no time at all.
Fast is ok. Just a little slower.
Standard is slow, it just ticks over.
I also notice that it appears to stop charging when the battery is full. Although I've stopped leaving my phone plugged in overnight.
But, I read that superfast might damage the battery and that's why it defaults to off. It's not a quick switch to enable/disable, so it's a decision to have fast or superfast on.
Or is life too short to worry?
sjrixon said:
There are so many options.
Superfast charging I find amazing. Quick plugin and the phone is back up to about 80% battery in no time at all.
Fast is ok. Just a little slower.
Standard is slow, it just ticks over.
I also notice that it appears to stop charging when the battery is full. Although I've stopped leaving my phone plugged in overnight.
But, I read that superfast might damage the battery and that's why it defaults to off. It's not a quick switch to enable/disable, so it's a decision to have fast or superfast on.
Or is life too short to worry?
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Click to collapse
Even if super charging would make the battery loose efficiency over time, I don't think it will be a noticeable problem during first owners time with the phone. I will upgrade in less than 18 months and I think most ppl upgrade within 2 years.
Sent from my SM-T865 using Tapatalk
Fast wireless charger most of the time, but I did buy a couple super fast wired chargers to scatter around when I'm in a time crunch
Sent from my SM-N986U1 using Tapatalk
Super Fast wireless charging all day everyday. I haven't plugged a cable into a phone since 2018. Battery life is solid so I'm never in a rush to charge a phone. Wireless is quick enough. I love the convenience of just throwing it in the stand without having to find the cable and stick it into the port. Especially in a dark room.
I've not really used wireless charging. So you have 15w wireless pads around the house?
Super fast charge too.
With PPS and the PD standard, it changes its power according to of the actual battery level and temp (and certainly more parameters) to avoid harming it.
I plug in every night, overnight next to my bed. Not fast charging, just regular charge, because it's not needed.
If you don't need to fast charge every day, turn it off. Doing it regularly will degrade long term battery life by a small amount. Both by the method of charging, and by the heat created by fast charging, as heat is bad for the life of a battery.
But all in all, it's not terrible. Just charge it howver you want. It's not going to cause any terminal issues. Just charge it when and however you want to.
I have switched off both Superfast as well as fast charging. Not sure if that will have any impact positive or negative as my opinion is that Samsung didnt go with 40W, 60W so on and so forth charging not because it cant do it (If Oppo,Vivo, Xiaomi can then Samsung definitely can) but as a bigger company they probably wanted to act more responsibly so they must have ensured that their 25W charging has negligible effect on battery and thats why they went with it. Just my 2 cents.