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Hi all,
I have a Samsung s4 GT i9505 and when i leave it for charge the charger gets very very hot and im not sure on what to do. I only bought the phone yesterday ( 22/07/14) so it was only my first night with it. I decided to switch off the phone and leave it on charge, but that made no difference. I installed all the OTA updates yesterday as well.
Any help would be appreciated. Many thanks
superv200 said:
Hi all,
I have a Samsung s4 GT i9505 and when i leave it for charge the charger gets very very hot and im not sure on what to do. I only bought the phone yesterday ( 22/07/14) so it was only my first night with it. I decided to switch off the phone and leave it on charge, but that made no difference. I installed all the OTA updates yesterday as well.
Any help would be appreciated. Many thanks
Click to expand...
Click to collapse
I have the same problem with my s4. I guess it is normal for a samsung devices, because I heard from other people having this problem on a s3 or s2
Same here, as long as it doesnt shut down its np, the charger for s4 provides 2A which makes it warm while charging
Sent from my GT-I9505 using XDA Free mobile app
It is not a problem. The battery gets warmer because samsung charger gives more "juice" than most other chargers. The battery needs more power to charge because the phone uses it more, so the battery heats up more. Also, it charges faster...
The higher the charger current (2A), the faster the charge rate, but also, more heat!
Guys my charger isnt a 2A charger, I got a 1A travel adaptor.
Input 100-240V 50-60Hz 0.15A
Output 5.0V 1.0A
But it runs incredibly hot when i leave it for a charge.
Hiya guys. Long time lurker but gonna pop that cherry today.
Was curious as to how many of you leave this phone fast charging overnight? I know its a smart charger and all that good stuff.
For an hour of charge i dont mind staying up for it since it prevents any damage that may happen. But i mainly do it to baby the battery.
i used the wireless one so it trickle charges and keeps battery in good condition. Fast charging will degrade it faster,
irzero said:
i used the wireless one so it trickle charges and keeps battery in good condition. Fast charging will degrade it faster,
Click to expand...
Click to collapse
Do you have any proof to back this up?
I've had the Note 4 since January and have been fast charging it over night every day since then and I haven't had any issues whatsoever still running with excellent battery life. I'm now using the S6 Edge+ and wouldn't think it would be a problem. The power cuts out once the battery reaches max so it shouldn't try and fast charge a full battery.
sandeepsb said:
Do you have any proof to back this up?
I've had the Note 4 since January and have been fast charging it over night every day since then and I haven't had any issues whatsoever still running with excellent battery life. I'm now using the S6 Edge+ and wouldn't think it would be a problem. The power cuts out once the battery reaches max so it shouldn't try and fast charge a full battery.
Click to expand...
Click to collapse
It's a well known fact that fast charging is bad for battery condition. The electrodes degrade and corrode and the higher amps required for fast charging will contribute to the issue. I fast charge my note 3 and I'm on my 3rd battery now and this is starting to show decreased life.
Sent from my SM-G928F using Tapatalk
sandeepsb said:
Do you have any proof to back this up?
I've had the Note 4 since January and have been fast charging it over night every day since then and I haven't had any issues whatsoever still running with excellent battery life. I'm now using the S6 Edge+ and wouldn't think it would be a problem. The power cuts out once the battery reaches max so it shouldn't try and fast charge a full battery.
Click to expand...
Click to collapse
Me too. My Note 4 was always on the fast charger and no obvious signs of deterioration. I am pretty sure Samsung has considered any issues, especially in a phone with a fixed battery, as they put Fast Charging very high on their list of selling point features.
.
I use my fast charger over night and have noticed when it reaches 100% the lightening icon that shows on the battery icon when charging goes away. So there must be some sort of electronic protection built into the phone
Sent from my SM-G928T using Tapatalk
Of course it stops charging. Lol
Sent from my SM-G928F using Tapatalk
Yeah. I still have the voice in the back of my head making me not let it charge overnight. The smart charger is nice to know it stops it from charging the battery, but still leaving the chance of having it fail in the middle of the night while its still connected to your phone is worrying to me. Even more that it pumps more voltage like a monster then any other wall charger i have.
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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!
Click to expand...
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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.
My new 3 day old S8(exynos) stops charging randomly after 80%
Sometimes it's struck at 83% and sometimes even at 57%
Using stock charger with cable..If I remove the plug and restart charging it comes to full 100 percent..
And I feel it happens while charging with location turned on..
Kindly help..
Anyone else facing this ?
Has it been doing this from the beginning? After a soft reset the first thing I would do is boot it into safe mode to see if something I installed was causing the problem.
unboxed said:
Has it been doing this from the beginning? After a soft reset the first thing I would do is boot it into safe mode to see if something I installed was causing the problem.
Click to expand...
Click to collapse
Problem is solved..
Apparently when the battery temp shoots up the phone stops charging..
Samsung's reply on this issue :
This mail is in regard to your Samsung handset S8.
We would like to inform you that; this is not an issue with the device, this is the inbuilt feature of the handset, during
*Wireless charging or fast charging, the device may feel hotter and this is normal range of operation which does not affect the device’s lifespan/ performance.
If the battery temperature goes beyond specified limit, the charger may stop charging the device and start charging again once temperature goes down upto the normal temperature (e.g. 36ºC) and this is only a precautionary action for customer safety. This mode is called as*“Swelling Prevention Mode”.
Swelling prevention mode is triggered due to the high temperature. If the phone temperature rises beyond certain limit, the maximum charging voltage is limited to 4.15V which is equivalent to 70~80% (±*5%) of battery level. This operation is disabled and starts charging again once temperature goes down up to the normal temperature (e.g. 36ºC)
-Taken from another thread when a fellow XDA member had the same issue and got the reply from Samsung..
chestersudhakar said:
Problem is solved..
Apparently when the battery temp shoots up the phone stops charging..
Samsung's reply on this issue :
This mail is in regard to your Samsung handset S8.
We would like to inform you that; this is not an issue with the device, this is the inbuilt feature of the handset, during
*Wireless charging or fast charging, the device may feel hotter and this is normal range of operation which does not affect the device’s lifespan/ performance.
If the battery temperature goes beyond specified limit, the charger may stop charging the device and start charging again once temperature goes down upto the normal temperature (e.g. 36ºC) and this is only a precautionary action for customer safety. This mode is called as*“Swelling Prevention Mode”.
Swelling prevention mode is triggered due to the high temperature. If the phone temperature rises beyond certain limit, the maximum charging voltage is limited to 4.15V which is equivalent to 70~80% (±*5%) of battery level. This operation is disabled and starts charging again once temperature goes down up to the normal temperature (e.g. 36ºC)
-Taken from another thread when a fellow XDA member had the same issue and got the reply from Samsung..
Click to expand...
Click to collapse
Makes sense, good to hear you got to the bottom of it. It's slightly worrying it gets so warm during charging it has to cut out though...
chestersudhakar said:
Problem is solved..
Apparently when the battery temp shoots up the phone stops charging..
Samsung's reply on this issue :
This mail is in regard to your Samsung handset S8.
We would like to inform you that; this is not an issue with the device, this is the inbuilt feature of the handset, during
*Wireless charging or fast charging, the device may feel hotter and this is normal range of operation which does not affect the device’s lifespan/ performance.
If the battery temperature goes beyond specified limit, the charger may stop charging the device and start charging again once temperature goes down upto the normal temperature (e.g. 36ºC) and this is only a precautionary action for customer safety. This mode is called as*“Swelling Prevention Mode”.
Swelling prevention mode is triggered due to the high temperature. If the phone temperature rises beyond certain limit, the maximum charging voltage is limited to 4.15V which is equivalent to 70~80% (±*5%) of battery level. This operation is disabled and starts charging again once temperature goes down up to the normal temperature (e.g. 36ºC)
-Taken from another thread when a fellow XDA member had the same issue and got the reply from Samsung..
Click to expand...
Click to collapse
Thanks for posting the info you were able to get from Samsung on your end. I've experienced this exact same fast wireless charging problem stopping at around 79% to 80% and when I contacted Samsung via their online help chat support, the rep I got said that they've never heard of the problem being reported to them! I told him that the problem is being reported all over the various internet sites and forums. He still denied it. Anyway, I've put a link to this forum thread in the other forum thread reporting the same problem. The overheating safety check that stops the charging makes sense to explain what we are all experiencing however I think it is a flaw and defect since it fails to allow fast wireless charging to charge our phone up to 100%. We will wake up in the morning late for work and the phone will not be 100% charged? No time to wait and recharge it to 100% when we have to rush out the door to go to work! I can see all the upset users!
Tested mine on Samsung original Fast Wireless Charging pad. When temperature more than 40°C then it will stop charging, you can monitor your phone temperature using 3C battery monitor widget. However, the issue is its temperature won't go down when it's sitting on the charging pad & make your charging halt until you take out the phone & let it cool down.
My solution is simple, use a USB fan blowing it when it charging wirelessly & its temperature didn't shoot up more than 38°C.
alexhee said:
Tested mine on Samsung original Fast Wireless Charging pad. When temperature more than 40°C then it will stop charging, you can monitor your phone temperature using 3C battery monitor widget. However, the issue is its temperature won't go down when it's sitting on the charging pad & make your charging halt until you take out the phone & let it cool down.
My solution is simple, use a USB fan blowing it when it charging wirelessly & its temperature didn't shoot up more than 38°C.
Click to expand...
Click to collapse
What gets me is that Samsung advertises that these charger docks have a built in fan that is supposed to keep the phone cooled. But the fans in these docks don't even blow on the phones at all. The placement of the fan vent holes are on the back of the base which serves no purpose cooling the phone itself. Dumb.
Here in India temperature reaches 44°C during a normal day...
Hence my phone stops charging all the time !
Pretty irritating..hence I am forced to use the mobile in an air conditioned room always..
Don't know if my particular unit is overheating..coz very few are complaining here in india..and Samsung is not accepting this as a fault and not providing replacement !
Can someone post their battery temperature during
1.Normal usage ( social apps with some Spotify)
2.Youtube in FHD with 100% screen brightness with video enhancer turned on for 8 to 10 mins
3.Fast charging
Mine is
1.38 to 40°C
2.43°C
3.More than 45°C
Infobits said:
What gets me is that Samsung advertises that these charger docks have a built in fan that is supposed to keep the phone cooled. But the fans in these docks don't even blow on the phones at all. The placement of the fan vent holes are on the back of the base which serves no purpose cooling the phone itself. Dumb.
Click to expand...
Click to collapse
lol. I suppose the charging pad fan is for the pad not for our phone.
Same issue with my Indian s8 plus on charging pause at 83%
Hi I Am also having the same issue with s8 plus .It stops charging at 83 % and if disconnect the charger for a min and reconnect it goes to 100 otherwise it sits at 83 % for whole day if I didn't replug. Hope it is a feature for safety. I Am getting 14 to 17 hours of battery life for 100% .so great battery management and safety by samsung great.
Good for Sammy was wondering why this happened
chestersudhakar said:
Problem is solved..
Apparently when the battery temp shoots up the phone stops charging..
Samsung's reply on this issue :
This mail is in regard to your Samsung handset S8.
We would like to inform you that; this is not an issue with the device, this is the inbuilt feature of the handset, during
*Wireless charging or fast charging, the device may feel hotter and this is normal range of operation which does not affect the device’s lifespan/ performance.
If the battery temperature goes beyond specified limit, the charger may stop charging the device and start charging again once temperature goes down upto the normal temperature (e.g. 36ºC) and this is only a precautionary action for customer safety. This mode is called as*“Swelling Prevention Mode”.
Swelling prevention mode is triggered due to the high temperature. If the phone temperature rises beyond certain limit, the maximum charging voltage is limited to 4.15V which is equivalent to 70~80% (±*5%) of battery level. This operation is disabled and starts charging again once temperature goes down up to the normal temperature (e.g. 36ºC)
-Taken from another thread when a fellow XDA member had the same issue and got the reply from Samsung..
Click to expand...
Click to collapse
The question really is why is it getting so warm when the phone is idle and charging? It normally stays cool.. so why on one random night did it get too warm..
There are clearly 2 problems here
Why is it getting too hot in the first place (assuming a country that does not have a very high ambient temp)
Why is it not doing what it is clearly supposed to be doing and continuing to charge once the temp goes down (as Samsung themselves have apparently said, it should continue to charge once normal temps are achieved but it is clearly not doing that)
ewokuk said:
There are clearly 2 problems here
Why is it getting too hot in the first place (assuming a country that does not have a very high ambient temp)
Why is it not doing what it is clearly supposed to be doing and continuing to charge once the temp goes down (as Samsung themselves have apparently said, it should continue to charge once normal temps are achieved but it is clearly not doing that)
Click to expand...
Click to collapse
exactly, not only does it get hot, but it stays hot
it's staying hot, when it's literally just maintaining the charge level.. what the hell is it doing?
lawrence750 said:
exactly, not only does it get hot, but it stays hot
it's staying hot, when it's literally just maintaining the charge level.. what the hell is it doing?
Click to expand...
Click to collapse
That would seem to be a serious problem. If it is stopping the charging due to the heat, and stopping it does NOT stop the heat then this "safety" feature is completely failing to work. It will sit there being too hot for endless hours, which is surely a big safety issue (else they wouldnt stop it charging in the first place!).
As if that wasn't bad enough, heat is bad for batteries, if its sitting there for hours not charging and just generating heat, it will be sitting there too hot for hours on end and degrading the battery.
Ironically if it just kept the charging going then I assume once at 100% it would actually stop charging and reduce the heat (although perhaps this doesn't work either and it also still stays hot??? this probably needs to be checked too, we don't want it sitting there staying hot even after it gets to 100%!). So in the current situation it would actually be better if it DIDNT stop charging so it could get to 100% and cool down instead of sitting there at ~80% and staying hot!
I have the new samsung convertible wireless charger and have not had it do that so far but I am also in the UK where it is not exactly hot anyway (we will see what happens in summer!).
The final question is has anyone had this happen when charging with wire?
ewokuk said:
That would seem to be a serious problem. If it is stopping the charging due to the heat, and stopping it does NOT stop the heat then this "safety" feature is completely failing to work.
As if that wasn't bad enough, heat is bad for batteries, if its sitting there for hours not charging and just generating heat, it will be sitting there too hot for hours on end and degrading the battery.
Ironically if it just kept the charging going then I assume once at 100% it would actually stop charging and reduce the heat (although perhaps this doesn't work either and it also still stays hot??? this probably needs to be checked too, we don't want it sitting there staying hot even after it gets to 100%!). So in the current situation it would actually be better if it DIDNT stop charging so it could get to 100% and cool down instead of sitting there at ~80% and staying hot!
I have the new samsung convertible wireless charger and have not had it do that so far but I am also in the UK where it is not exactly hot anyway (we will see what happens in summer!).
Click to expand...
Click to collapse
i've had mine just over a month, and most nights i wireless charge, all but one night it has charged without issue, to 100%, and it was cool when i woke up in the morning
the only weird thing i noticed at the time when this happened, was that after I had picked the phone up, and put it back on charge, it said 'Fast wireless charging' - yet in settings>advanced>accessories, fast wireless charging was disabled.
I re enabled this, and it hasn't happened for the two nights since. but i don't know if it was related or not really.
chestersudhakar said:
Problem is solved..
Apparently when the battery temp shoots up the phone stops charging..
Samsung's reply on this issue :
This mail is in regard to your Samsung handset S8.
We would like to inform you that; this is not an issue with the device, this is the inbuilt feature of the handset, during
*Wireless charging or fast charging, the device may feel hotter and this is normal range of operation which does not affect the device’s lifespan/ performance.
If the battery temperature goes beyond specified limit, the charger may stop charging the device and start charging again once temperature goes down upto the normal temperature (e.g. 36ºC) and this is only a precautionary action for customer safety. This mode is called as*“Swelling Prevention Mode”.
Swelling prevention mode is triggered due to the high temperature. If the phone temperature rises beyond certain limit, the maximum charging voltage is limited to 4.15V which is equivalent to 70~80% (±*5%) of battery level. This operation is disabled and starts charging again once temperature goes down up to the normal temperature (e.g. 36ºC)
-Taken from another thread when a fellow XDA member had the same issue and got the reply from Samsung..
Click to expand...
Click to collapse
have this problem with a fast car charger from Samsung...stops at 85% and dropping with the charger connected... yeahh the phone was hot because of the navigation maps......(( dam they need to fix this crap
on my s7 did not had thia problem
---------- Post added at 11:36 AM ---------- Previous post was at 11:34 AM ----------
did not find nothing on the internet about
Swelling Prevention Mode
From India, I had the same problem while charging off the official charger but I thought that's normal since my M8 "Using QC2.0" also charged very fast til 70-80% and then slowed down quite a lot but the S8 almost stops around a similar mark and then sort of trickle charges the rest of the way.
Had I to guess I would say that between the S8 and the M8 the S8 would take much more time to reach 100% from 80% than the M8
they don't test the phones they crap
---------- Post added at 12:13 PM ---------- Previous post was at 12:10 PM ----------
they did had a video that show s8 phones tested on heat
http://www.pcmag.com/news/352655/inside-samsungs-galaxy-s8-testing-facility
I think it's a joke
ewokuk said:
That would seem to be a serious problem. If it is stopping the charging due to the heat, and stopping it does NOT stop the heat then this "safety" feature is completely failing to work. It will sit there being too hot for endless hours, which is surely a big safety issue (else they wouldnt stop it charging in the first place!).
As if that wasn't bad enough, heat is bad for batteries, if its sitting there for hours not charging and just generating heat, it will be sitting there too hot for hours on end and degrading the battery.
Ironically if it just kept the charging going then I assume once at 100% it would actually stop charging and reduce the heat (although perhaps this doesn't work either and it also still stays hot??? this probably needs to be checked too, we don't want it sitting there staying hot even after it gets to 100%!). So in the current situation it would actually be better if it DIDNT stop charging so it could get to 100% and cool down instead of sitting there at ~80% and staying hot!
I have the new samsung convertible wireless charger and have not had it do that so far but I am also in the UK where it is not exactly hot anyway (we will see what happens in summer!).
The final question is has anyone had this happen when charging with wire?
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From INDIA..Here summer is at its worst temperature reaching 42 celcius..It happens all the time with the stock wired charger.My phone never charges beyond 84% except if I am in an air conditioned room..
And also fast charging never works..Takes 2.45 hours from 3 to 100%
Worst samsung !!