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Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
swainclubber said:
Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
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Your phone's battery should be fine as long as it's not overheating.
Most of today's batteries are built to last, which means if you are actually abusing wireless charging, you will start noticing not before 1 year from now(estimated.). And by then, most people have switched their devices. Therefore, it might be damaging you battery, I'm not an expert, but you should not start seeing any bad impact on your phone in the near future.
Other people's opinions might be more helpful than mine, but you should keep this in mind.
Cheers for your opinion. All are greatly appreciated.
guetzli32 said:
Your phone's battery should be fine as long as it's not overheating.
Most of today's batteries are built to last, which means if you are actually abusing wireless charging, you will start noticing not before 1 year from now(estimated.). And by then, most people have switched their devices. Therefore, it might be damaging you battery, I'm not an expert, but you should not start seeing any bad impact on your phone in the near future.
Other people's opinions might be more helpful than mine, but you should keep this in mind.
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Right on, and by this time next year the OEM batteries will be cheaper and thus just replace them
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app
swainclubber said:
Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
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Click to collapse
Almost no one charges batteries the ideal way.. well, because it's inconvenient to do so. Fortunately battery technology is getting better every year, batteries take longer to wear out and are (slowly) getting cheaper to replace when it comes to that.
The ideal way to charge a battery depends on the type of battery. The S5 uses a lithium ion batteries. Ideally you would charge a Li-ion battery slowly, not deep cycle it, protect the battery from hot environments and (idealy) stop charging around 85%.
Heat is the major enemy, battery life is shortened by a factor of two for every 10°C increase above 25°C. High cell voltages and cycling would fill out the top three list of things you'd like to avoid to maximize battery life.
So what does all that mean? Frequent wireless charging is beneficial if your battery charge is < 85%, because you don't want to deep cycle and slow charging (which wireless is) is better than a fast charge cycle for battery life. And a moderate stress if you are charging it when the battery is > 85%. Do what you can to avoid high heat e.g. don't leave your phone in a very hot car on a sunny day if you can avoid it. And if you go Skiing or store your phone in a freezer for some reason.. let it warm up a bit before trying to charge it.
Most of us will charge our phones even if the battery charge is > 85% though because we want to maximize run time, even though the higher voltages above 85% are a detriment to battery life. It's a trade off between utility and battery life. Battery life is conservatively specified around 500 charge cycles these days.. but that is a loosely defined term with a lot of associated variables. Depending on how you use your phone.. your battery may go six months, a year, even two years before you notice that your run time just doesn't cut it anymore.
I'd say don't worry about wireless charging. Charge it as frequently as you like. But try to keep your phone cool (out of the sun) when you can.
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Cheers for that appreciated. However wireless charging on my setup involves a fair amount of heat
Wireless charging is relatively inefficient. Which means that there will be some waste heat generated. But it varies substantially on the brand of charger and whether you are using an resonant or inductive design. My wireless charger produces minimal heat.
Unless you measure the temperature.. it's hard to gage whether the heat from yours is a serious issue or not. Mine increases the surface temperature ~ 5C.
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Would you mind sharing which charger you use?
fffft said:
Wireless charging is relatively inefficient. Which means that there will be some waste heat generated. But it varies substantially on the brand of charger and whether you are using an resonant or inductive design. My wireless charger produces minimal heat.
Unless you measure the temperature.. it's hard to gage whether the heat from yours is a serious issue or not. Mine increases the surface temperature ~ 5C.
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lordhamster said:
Would you mind sharing which charger you use?
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How good are you with Orcad and a soldering iron?
I built my own @ 3.57 Mhz, which is also a non-standard (but very efficient) coupling frequency.
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swainclubber said:
Is it best to do long charges then let it drain, or is it safe to for example use the phone ten mins and put it back on the mat for ten then use again and so on. Does constantly charging mess things up?
Thanks.
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Click to collapse
Lithium-ion battery nowadays does not have memory effect. So constant recharging and disconnecting is fine.
Cheers folks.
Hello friends,
So I just got my Note 4 and i'm wondering how long should I keep it in charge for the first time? And should I drain it on first use or charge it when it's at let's say 20%??
Thanks in advance.
14 hrs, dont drain, battery should be between 20-80% before charging in normal use, fast charge off.
@zurkx
Thanks for the reply.
Are you sure about the 14 hours??? I thought Li-ion batteries don't need that long of a charging time !!!
XeroHertZ said:
@zurkxAre you sure about the 14 hours??? I thought Li-ion batteries don't need that long of a charging time !!!
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Please happily ignore that "advices".
Use Fast charge, charging takes exactly till the battery is full, that's about 1,5 hours for a full charge.
I don't see ANY sense in charging a LiIo battery "fuller than full", just impossible nonsense.
LiIo batteries suffer of aging, slightly increased by the number of charges, highly (!) increased by overheating, not of any memory effects.
There is NO "breaking in" of the Note 4s battery, amperage of fast charge doesn't come even near the safety limits, won't cause quick degradation or overheating.
So just don't listen go the immortal myths and "ancient wisdom" propagated by people not aware of the fact that battery technology indeed changed over the decades.
Chefproll said:
Please happily ignore that "advices".
Use Fast charge, charging takes exactly till the battery is full, that's about 1,5 hours for a full charge.
I don't see ANY sense in charging a LiIo battery "fuller than full", just impossible nonsense.
LiIo batteries suffer of aging, slightly increased by the number of charges, highly (!) increased by overheating, not of any memory effects.
There is NO "breaking in" of the Note 4s battery, amperage of fast charge doesn't come even near the safety limits, won't cause quick degradation or overheating.
So just don't listen go the immortal myths and "ancient wisdom" propagated by people not aware of the fact that battery technology indeed changed over the decades.
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Thanks Chefprol.I have done some research on charging the battery and have come to a conclusion that once it's charged I can use it straight away but and then drain it to 18 to 20% then charge it fully.
Chefproll said:
Please happily ignore that "advices".
Use Fast charge, charging takes exactly till the battery is full, that's about 1,5 hours for a full charge.
I don't see ANY sense in charging a LiIo battery "fuller than full", just impossible nonsense.
LiIo batteries suffer of aging, slightly increased by the number of charges, highly (!) increased by overheating, not of any memory effects.
There is NO "breaking in" of the Note 4s battery, amperage of fast charge doesn't come even near the safety limits, won't cause quick degradation or overheating.
So just don't listen go the immortal myths and "ancient wisdom" propagated by people not aware of the fact that battery technology indeed changed over the decades.
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Thanks ! i tought it would be a old myth to first drain the batery and then fully load it but as far as i know its only with old phones and mp3 players and such.
hope i will get my note 4 today ! waiting for it since monday
Fast Charge is not really a useful feature for me, it just hurts the battery more in the long run
what about the thoughts on conditioning the battery?
Sent from my SM-N910C using XDA Free mobile app
There's no need to condition the battery, its a lithium battery.
If you're having battery drain issues I would suggest you clear your data cache.
ddaharu said:
what about the thoughts on conditioning the battery?
Sent from my SM-N910C using XDA Free mobile app
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this is the same guy making up stuff about the note 4 GPS being bad.
dont listen to fools.
First charge needs to be 14 hours to trickle charge the battery to full and make sure the meter is calibrated to a full battery.
fast charge does reduce battery life since it charges at higher voltage and amperage. any battery gets damaged a little by that. best is a slow charge (preferably Qi) at a normal charging voltage. Slower the better for longer battery life. if you want convenience over battery life then by all means fast charge and mess it up and replace after 2-3 years.
Who's post are you referring to?
zurkx said:
this is the same guy making up stuff about the note 4 GPS being bad.
dont listen to fools.
First charge needs to be 14 hours to trickle charge the battery to full and make sure the meter is calibrated to a full battery.
fast charge does reduce battery life since it charges at higher voltage and amperage. any battery gets damaged a little by that. best is a slow charge (preferably Qi) at a normal charging voltage. Slower the better for longer battery life. if you want convenience over battery life then by all means fast charge and mess it up and replace after 2-3 years.
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arjun90 said:
Who's post are you referring to?
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It's mine. That guy already bumped into me a while ago, now it's time for his revenge.
I'll care for that, now...
---------- Post added at 02:09 PM ---------- Previous post was at 01:32 PM ----------
zurkx said:
this is the same guy making up stuff about the note 4 GPS being bad.
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So here we go; you asked for it...
My critism about the Note 4 refers to it's GPS receiver, which is "deaf" compared to the competition and shows frequent signal drops.
More here: http://forum.xda-developers.com/note-4/general/gps-close-to-unusable-t2948602
dont listen to fools.
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Indeed - have a look:
First charge needs to be 14 hours to trickle charge the battery to full and make sure the meter is calibrated to a full battery.
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I already advised to realize this is 2014 battery technology, not the ancient batteries of the past.
Short: There is no "trickle charge" with Lithium-Ion-batteries.
See this: http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries - quote: "The difference lies in a higher voltage per cell, tighter voltage tolerance and the absence of trickle or float charge at full charge."
fast charge does reduce battery life since it charges at higher voltage and amperage. any battery gets damaged a little by that.
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Quote: "The charge rate of a typical consumer Li-ion battery is between 0.5 and 1C in Stage 1, and the charge time is about three hours. Manufacturers recommend charging the 18650 cell at 0.8C or less."
"C" is the capacity, 3220 mAh with our Note 4's battery. So we're save to charge with a current (milliamperes, "mA") of up to 3220 mA - if we follow the manufacturer's advice for the older type of batteries of that kind (18650 is an old warrior in the field), there's still 2576 A left.
So what does our fast charge supply deliver ? Look at it's ratings: 5 V, 2 A (2000 mA).
So even fast charge is far below the limits - our real limit is 3220 mA, but fast charging just uses 2000 mA.
Sound and safe.
Wonder about me highlighting "higher voltage" in zurkx's highly elaborate statement in red ? - Answer is above: The voltage does NOT change, it is NOT higher. Of course not !
The worst enemies of LiIon batteries are heat and age.
Heat is generated by a) placing the device at a hot spot (like behind the car's windscreen or in bright sunlight), b) by using demanding features like 4K video recording or highend games, c) by charging .
a) Your call. Just don't let your Note get hot. Overheating destroys your battery in no time. We're lucky we've got an exchangeable battery - so nothing to really worry about.
b) Your call. See a).
c) Charging produces some heat, especially on the "last mile", when the battery is "almost full", because the battery is a bit reluctant of getting charged up to the brim. So more heat is generated in that last phase. It's not much, won't reach the safety limits. It just can't, because the build-in charging circuits limits the current if heat gets up.
By the way: That integrated charging circuits are propped with safety measures, checking charge, condition, temperature and the like.
So even if you hook up a charger capable of providing 20 whopping amperes, the circuits just won't let that happen.
There is no way of providing the battery too much current; it's automatically limited.
best is a slow charge (preferably Qi) at a normal charging voltage. Slower the better for longer battery life.
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Again; welcome to the 21st century. We don't need any slow charge. It's the opposite.
Charging right slow has the danger that apps on the phone draw more power than the charge provides. That may drain your battery instead of filling it.
Plus: If you hook up the charger for long, it will be recharged (charge gets "topped off") frequenly. And every new charging attempt has a slightly negative impact on the battery's life; it's like wearing it a bit down. - Charge often, reduce your battery's life. That damage is tiny, by the way. But it is there, so hooking up your charger for many hours slowly kills your battery.
Now for the aging:
if you want convenience over battery life then by all means fast charge and mess it up and replace after 2-3 years.
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LiIon battery ARE AGING, up from the time of manufacture.
You all know that: You charge a device like you're told by the instructions - but after 1 to 3 years you notice a severe drop of usage time, a drop of capacity.
That's aging.
NOTHING you can do against that but buying a new battery.
So your battery will lose it's capacity over time; if you use it or not. You all know that, you all experienced that.
With the Note 4, we can happily buy a new battery if the old one runs out; it's that simple. But as a normal Li Ion battery reaches it's shelf live after 2 or 3 years anyway, there's NO (!) need of burdening it and you with slow charge. The results are exactly the same, with the difference that you save precious time with fast charging.
And now allow me quoting again:
dont listen to fools.
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Have a nice day, all of you except one.
youre completely wrong.
The QuickCharge tech charges at higher VOLTAGE and AMPERAGE.
http://www.androidauthority.com/quick-charge-explained-563838/
Quick Charge 2.0
Voltages 5v 5v / 9v / 12v
Max Current 2A 3A
Snapdragon 200, 400, 410, 615, 800, 801, 805
The rest is just BS as usual. You have no idea what youre talking about. Dumping 9V (Samsung Note 4 AFC) into a 5V battery makes it charge hotter and faster and degrades it significantly. After two weeks of fast charge i lost a small chunk off the top of my brand new battery.
just bad advice as usual.
zurkx said:
youre completely wrong.
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Yes, indeed. I was completely wrong by believing you'd understand some simple things.
In fact, I am not sure if I should take your statements for serious or just for a joke.
The QuickCharge tech charges at higher VOLTAGE and AMPERAGE.
Voltages 5v 5v / 9v / 12v
Max Current 2A 3A
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So you REALLY believe that changes of the output voltage of the POWER SUPPLY lead to the BATTERY charged with more volts ?
You can't be serious. That's technically impossible.
Let's put it easy:
If you insert your power supply into a 110 V receptacle in the USA, you get 5 V output.
So according to your "logic", using the same power supply in Europe (230 V) increases the voltage to 10 V ?
No. Just NO.
That higher POWER SUPPLY voltage is used for fulfilling the rule W = V * A (Watt = Volt * Ampere); just to be able to squeeze more power through the power supply's cable.
In the Note 4 and in the charging circuit, that voltage OF COURSE will be regulated down to the regular charging voltage - just with the benefit to carry more amperes.
So the CHARGING VOLTAGE stays the same; it does NOT follow the voltage supplied by the POWER SUPPLY. It never does.
So fast charging does NOT (read that: NOT !) increase the charging voltage. It cannot.
Got that now ? - Or do I need to put it ever more simple ?
It does not help using swearing words like "fool" or "bull****".
But it could help just saying: "Oh, sorry, I was wrong. - My apologies."
Make yourself at home with the basics of lithium ion and charging technology. THEN speak up.
Ah, overlooked something:
After two weeks of fast charge i lost a small chunk off the top of my brand new battery.
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1) Hope that chunk fell somewhere you were able to pick it up again.
2) How to you KNOW that ? I expect a detailled description about how you did the magic of finding out that your battery doesn't charge to 100 %.
3) If you KNEW that fast charging would kill your battery, wise man - why did you allegedly use the feature ? - Sorry, man... Your statements are not very trustworthy. I guess you never used that feature, just say so to strengthen your shaky point of view. Please don't mess with a perception psychologist.
4) If your battery really suffered, that might be due to your highly acclaimed and absolutely pointless 14-hours-charging-marathons, causing a permanent charge on/charge off cycle, weakening your battery.
So please just stop bashing a real useful feature of the Note 4. If you just love waiting ages for batteries to charge - your preference. But please stop spreading false facts about things you very obviously are not at home with.
And a last thing which might stop that aimless harassing fire of yours: I am HAM, a licenced amateur radio operator, holding the highest German licence class. These are the people who know a bit about volts and amperes.
how hard is it for you to understand that quickcharge 2.0 outputs higher VOLTAGE and AMPERAGE to charge the battery ? The charger charges the BATTERY AT 9V 1.67A up to 50% and then switches over to the regular 5V 2A charge rate. INPUT VOLTAGE (110V or 230V) has nothing to do with OUTPUT VOLTAGE. It charges the battery at 9V REGARDLESS of INPUT VOLTAGE.
edit:
also it has nothing to do with the cable. you must be crazy if you think a cable issue exists whether you transfer 15W or 10W across it. the cable is rated for well beyond that. the reason for the higher voltage is that modern lithium ions can accept high voltage charge rates with limited damage at low amperage. the reason they cut it off at 50% is the battery would be severely damaged if you tried to charge it to 100% and overshot. so yes quickcharge 2.0 really does charge your battery at a higher voltage than it was designed to be charged at. and no they dont have a magical transformer on your phone to go from 9V to 5V. otherwise they would be using it all the time and fast charge 9V to 100%. the wall plug is the only thing which has a transformer and the phone uses what it gets from there. they arent going to build half of another wall plug (9V DC-DC) and stuff it into the phone. it would generate heat and add bulk. Instead the PMIC "spikes" the battery with higher voltage and keeps it roughly constant (load modulation) by communicating with the quickcharge 2.0 AFC on the other end.
Hopeless.
I just love these battery threads, there's always some muppet who says the battery needs conditioning and must first be charged for a suitably ridiculous length of time. When it's charged it's charged, lithium batteries have no memory effect so the idea of conditioning them is moronic
Sent from my SM-N910F using XDA Free mobile app
yes they have no memory effect. why ? because you say so.
other people believe otherwise because they actually test things out for themselves :
http://www.psi.ch/media/memory-effect-now-also-found-in-lithium-ion-batteries
http://pocketnow.com/2013/05/03/li-ion-batteries-memory-effect
http://www.nature.com/nmat/journal/v12/n6/full/nmat3623.html
no need to keep it for 14 hours, as they said in the catalog you only need to charge it till it's full, then unplug the charger.
Hello again !
After all cooled down a bit, here's some more information about that dreaded HIGH VOLTAGE fast charging uses which seemingly makes some of you wet your pants.
First, there's an experiment you can do yourself. You don't need to do - but it's quite impressive and gives you some proof of the things I say.
Get two 9 V batteries; the small rectangle ones we all know. Connect the positive contact of the first battery with the negative contact of the second. Thus you get an 18 volts DC power source.
Get a thin, isolated wire, short-circuit the open contacts with the wire. Wait.
Nothing special will happen, maybe the wire will get a little warm - and your batteries will eventually die.
(If you use a VERY thing wires, it might heat up.)
Now take a length of the same wire, do the same using your car's battery (12 – 13.8 V DC).
WARNING !
1) Take the battery out of the car, set it on solid ground with nothing combustible near !!! Do NOT try this with the battery still in the car !!!
2) Use pliers to connect the wire with the battery contacts !!!
3) Do that OUTDOORS !!!
Short-circuit the battery contacts using the pliers with the wire.
You don't need to wait. The cable will turn into a smoking, burning, white-hot thing in an instant.
Huh ? - We've got 18 V with just nothing happening, we've got just 12 V wreaking instant havoc and destruction !?
Amperage is the key !
Voltage alone does not cause the destruction, it's the amperage.
9 V batteries cannot provide sufficient amperes for killing the wire; 12 V car batteries do.
Short: High amperage kills wires, high voltage doesn't.
So back to our topic...
To fast charge our Note 4's battery, we need power, watts. But the tiny wires in the Note 4 can't withstand a high wattage; they would heat up like the wire connected to the 12 V car battery.
So Samsung uses a little trick, according to Ohm's law: W = V * A, W is watts, V is volts, A is amperes.
So we can achieve a high wattage by EITHER using a higher voltage OR a higher amperage.
Higher amperage does not work because it will kill the tiny wires in the Note.
So Samsung raised the voltage for carrying more watts from the power supply via the internal Note 4's cabling to the charging circuit.
That higher voltage gets transformed down to the normal charging voltage at the charging circuit.
Your battery is charged with the usual voltage, but with the benefits of a higher amperage.
That's all the magic: That higher voltage is used to carry more wattage to the charging circuit, but not beyond. Nothing else.
And that's why it does not harm your battery; charging voltage will not change - your battery just gets charged faster, always monitored by the charging circuit which will lower the charge accordingly if needed, so your battery will always be safe. That's why the "last mile" (charge from about 92 % to 100 %) takes more time to charge - because the charging circuit automatically lowers the charge to protect your battery.
So don't be afraid of that higher voltage; it never reaches your battery, it is just a means for transferring higher wattage via tiny wires.
Note: You ever wondered why Europeans use 230 V instead of 110 V ? - That's the reason. Being able to carry more watts over regular power lines without risking the wires heating up too much. It's not a means of destruction, it's the opposite.
Ive bought my n6p a few days back but is already a second hand.
Though its in perfect condition I would still love to take care of the battery since I know theres been a large chunks of battery cycle depleted already.
An average li-ion has about 300-500 charges before battery shows signs of deterioration.
In order to increase the battery life cycle, charging it with only 4.05 volts as conpsred to 4.20+ is the best way to take care of li-ion cells.
The problem is, the charger that comes with n6p produces volts from 4.16 as the minimum up to 4.4+ which is basicslly dtressful to the battery, plus letting it be plugged in to 100% increases temperature and so on.
I can go on.
Now, I have the habit and got an app that will chsrge the battery judt to 78% or 85% which turns down voltage just below 4.2, however there sre still instances that the voltage goes more than 4.2 even though im using a standard 900mah charger and not the rapid charger (original usb cable from huawei type a-std)
The question is, is there anyway to turn down voltage for n6p?
If not, any electrical engineer or anyone who has great knowledge backed with experience here to tell the comunity if chsrging in 4.2+ v is safe for n6p and why? Thanks
Charge voltage above 4,23ish is not good for lithium battery cells. Mine has a reported battery voltage of 4,4 volts.(!!)
As to the actual science of overcharging/over-volting lithium batteries, I don't think there's any long term 500-1000 charge cycle data. I do however have experience from radiocontrolled 1/8 scale lithium powered cars. Absolutely none of the lithium battery sellers or charger manufactors approve charging over 4,2volts. If you have a higher end charger you can push them to 4,25v-4,35v for cheaty improved off-the-line race starts but the charger will beep and complain/warn you constantly about the risks.
I was slightly concerned about charge voltage aswell, optimum charge modes for lithium cells are constant current ie 1800 mAh for this device until battery reaches 4,05 ish volts then constant voltage until 4,2v but it seems that phone manufacturers are either calibrating the measurement data or pushing the charge rate for convenience. If the latter is true you have all the right to call it planned obsolescence if the non-existent science of overvoltage charging is correct. The most accurate way to measure battery voltage would be to probe the battery directly while charging and while fully charged with a digital multimeter
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.
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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..
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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..
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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.
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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.
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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..
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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)
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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?
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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!).
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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..
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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 !!
My phone recently started getting really hot while charging. I've had it just over 1 year. I've been using the same anker cable and 5 port charger or a decent 3 port charger the entire time. I charge it every night. Neither charger is fast charging. Is this normal? I really don't want to get a new phone until next years Samsung phone with the spen whether it's the s21 or note 21.
Don't charge overnight or past 90%; 40-65% is ideal for battery longevity.
Li's like small, frequent midrange charges.
With fast charging my 10+ gets 25% (40-65%) in 12.5 minutes, that lasts 2-3 hrs SOT.
Charge it as many times a day as needed; minimal battery damage.
Avoid charging if under 70 F, stop charging if the battery reaches 100 F. It will not fast charge if too cold and cold charging can permanently degrade a Li battery.
As to why it's overheating now, try a known good charger and cable. It may be getting "dirty" power ie excessive ac or high frequency ripple, voltage spikes, incorrect voltage etc if so it's damaging the battery.
If battery capacity has noticeably dropped it likely has failed or is failing and will need replaced.
Overheating during charging could also be a mobo power controller failure although this is unlikely.
There's been a few people reporting over heat and sluggishness while charging I've been seeing. Alsoake sure there isn't any lint or trash in the type c port. The type c is more prone to collecting trash. As well as previous posters answers this is more of a follow up on his answers
TheMadScientist said:
There's been a few people reporting over heat and sluggishness while charging I've been seeing. Alsoake sure there isn't any lint or trash in the type c port. The type c is more prone to collecting trash. As well as previous posters answers this is more of a follow up on his answers
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Add to that avoid using the phone while charging* as it messes up the charge curve; it will increase charge time and the temp of the battery.
*Listening to the Buds with the screen off doesn't effect the charge rate by any tangible amount.