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hey there..
got my S2 yesterday and had a wave before..
the accu is charging very slow..(from 19% - 100% about 3 hours)
and while it´s charging and i do something with the phone, or without doing sth, too. i become very hot..
is it normal?
newest firmware is on the phone..
greetz
well without telling us what temperature you are reaching we cannot really say, but the phone will get hot if you use it while charging, especially if you make a call while charging.
don´t have opportunity to know what it is exactly..
when i touch if feels like a cup of tee at the time you can drink it first..
what about the charging time?
greetz
MoraX1992 said:
got my S2 yesterday and had a wave before..
the accu is charging very slow..(from 19% - 100% about 3 hours)
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This is pretty normal, Li-Ion-batteries can´t be charged fully under 3h. Devices that claim to charge the battery in just 1 or 2 hours will charge it only to about 80% and then tell it is fully charged.
You can charge a Li-Ion-battery very fast from 0 to about 75-85%, if the power-adapter delivers enough energy this can be done in about 1h.
But to fill the rest up to 100% you need another 2-3h.
Li-Ion-cells are charged in 2 stages.
In the first stage charging is done with a current between 0,5C and 1C. C in this case means capacity, so our 1,6Ah-battery will be charged with 0,8-1,6A.
The voltage of the cell rises from about 3V when completely flat (you shouldn´t discharge a Li-Ion-cell below 3V or it will be damaged permanently, when discharging below 2,7V the cell becomes unstable and could explode when being charged, therefore a safety-circuit should prevent any further charging when the cell-voltage was too low) to about 4,2V.
When the cell reaches 4,2V it is charged to about 75-85%.
If you would charge further at this rate, the cell-voltage would rise even more and significantly reduce the life span of the battery.
The supplied power-adapter delivers 0,7A at 5V, so with some quick calculations it will not be able to charge the battery up to this stage below 1h.
If all the power from the adapter can be used for charging (which means no other phone-activities which will consume power) it can reach the saturation-stage in approximately 1,5h.
To completely charge the battery stage 2 follows, this is also called the saturation-stage.
During this stage the charging-circuit will hold the cell-voltage constant and reduce the charging-current accordingly.
If you want to charge the battery completely the rather weak power-supply doesn´t matter that much (at least as long as you don´t use the phone otherwise and take a significant amount of power away from charging). The faster you charge in stage 1, the longer the saturation-stage will last. The whole charging-time is not influenced a lot.
To fully charge the battery you will always need about 3-4h. Also the difference would not be great whether you begin charging at 0%, 20% or 30%.
Charging the first few % will always be very fast and gets slower the fuller the battery already is. The saturation-stage will take about 50-75% of the overall charging-time, so there is no significant difference whether the battery is completely flat or still has some charge left.
and while it´s charging and i do something with the phone, or without doing sth, too. i become very hot..
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Are you just charging the phone or using it the same time? If you are just charging it, it definitely shouldn´t get hot, charging Li-Ion-cells has a very high efficiency-factor (about 95-99%), so there shouldn´t be much heat generated from the charging.
If you are using it the same time, it is pretty normal that the phone is getting warmer.
It is also important what is getting hot. Is it really the battery (the lower half of the phone) or rather the SoC (which seems to be placed just below the camera)
If it isn´t the battery, it can´t be in direct relationship with the charging. If the whole phone is getting warm, it is an indication, that the SoC is doing some work and generating the heat.
If only the battery gets hot (and not just slightly warm) this can be a problem. Either the charging-current is too high (quite unlikely, with the weak power-adapter) or something else is wrong, which will at least cause a shorter life-time of the battery.
It is normal that the battery gets a bit warmer than the surroundings, especially if the battery is in the early phase of stage 1, where it is charged pretty fast.
While the charging will not produce much heat, the battery is in a plastic-shell, so it can´t be transported away that fast.
But if it gets really hot you have a serious problem. But I doubt this, the phone actually has a protection, that will not charge the battery above a certain temperature-level.
MoraX1992 said:
and while it´s charging and i do something with the phone, or without doing sth, too. i become very hot..
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If battery gets a little bit hot, it's normal, if you get hot then i don't know
Hi, I have searched and read the related threads in the forum about SGS2 charging issue. It is true that the phone charges really slowly compared to other phones. I just tried playing a game and charging at the same time and the result is the phone was barely charging, which I think is a ridiculous. It means the power consumption when playing a game is almost equal to power being charged.
How about everyone else's charging time? I read before it seems Samsung capped the charging rate at 700mA. Not sure if it's true.
hbkmog said:
Hi, I have searched and read the related threads in the forum about SGS2 charging issue. It is true that the phone charges really slowly compared to other phones. I just tried playing a game and charging at the same time and the result is the phone was barely charging, which I think is a ridiculous. It means the power consumption when playing a game is almost equal to power being charged.
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Being a high powered phone, it consumes a lot of battery power when being used and very little when in standby. So if you want to charge it at full rate, don't use the phone at the same time.
hbkmog said:
How about everyone else's charging time? I read before it seems Samsung capped the charging rate at 700mA. Not sure if it's true.
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Without using the phone, my average charging time has been 3 hours and 43 minutes to get from totally flat 0% to 100%. Normal daily charge from about 20% to 100% takes 3 hours.
The charging rate is capped so that the battery and phone does not over heat during charging. An overheating battery will expand and possibly explode, thus potentially causing phone damage and user injury. That is why the charging rate is limited.
Same as posted before zero to full about 3 hours .
jje
Same here...more than 3 hours for 0-100%...even this reduced charging heats up the phone..
KE series of firmware charged really slowly, but it was fixed after KE7 I think. With the latest KG3, charging from 0 to 100 is done in 2.5 hours with wall charger.
Also don't forget that this phone has a 1650 mah battery. Don't expect it to fill it up at the same time as a 1300 mah one found in most other phones.
i usually charge at 20%. i also get about 3 hours to full charge
I still think someone should increase the charge current and see how it fares. It's all about tweaking and testing.
Charge the phone turned off, that's the fastest way to charge it.
Well personally I think it's kind of counter productive if the phone can't charge properly when you use it at the same time.
RogerPodacter said:
I still think someone should increase the charge current and see how it fares. It's all about tweaking and testing.
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So why don't you do it yourself and tell us how it goes?
Bump
Would be nice to see in Cog or Vill
So how much truth is in statement that you can't use navigation, listen to MP3s and charge via car charger because your phone will be discharging anyway?
Ever since I first got my Note 4, I've loved two things about it more than almost everything else: battery life and charging speed.
Two nights ago, I was bored and - I know, it's a strange thing to do when bored - decided to see how fast fast charging was compared to normal charging. It took my phone about 123 minutes to fully charge from 0 to 100% with fast charging disabled.
But that's not what I care about. What I care about is the fact that, before I disabled fast charging and fully charged my phone from 0, I would typically have about 10% left after a twelve hour cycle that included around 5 hours of screen-on time.
After my slower charge, I found that, after about 11 hours, I'd had my screen on for 4.5 hours, and my battery was still sitting at 55%. This improvement absolutely astounded me, and I want to encourage all of you to see how your mileage varies (or perhaps doesn't) by disabling fast charging.
I'd like to add that I've always been a huge proponent of fast charging, and I've always dismissed the common notion that it's bad for a phone's battery. But I can't ignore my own results.
EDIT: I should add that this was without power-saving mode or airplane mode enabled at any point in time. And the screen brightness was set to the same value I use generally, and not the minimum I'd use in total darkness.
I haven't used fast charge except for the first few days I had the phone. I just never needed my phone charged fast.
I can get about 6.5 hours of screen on time with around 20% battery left on power saving mode.
droidx2.3.3 said:
I haven't used fast charge except for the first few days I had the phone. I just never needed my phone charged fast.
I can get about 6.5 hours of screen on time with around 20% battery left on power saving mode.
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I'd had fast charge enabled until two days ago because I never saw anything but advantages to it. I also should add that I don't use power saving features until I'm down to at least down to 15%. Glad to hear you're getting good performance
I only use fast charging. If I do a heavy use day, I get about 5-5.5 hours of SOT and run out. Not sure how long it lasts.
On average, I charge my phone every third day and get 4-4.5 SOT.
I think my battery life is pretty exceptional. I don't leave the phone on the charger overnight, it gets unplugged immediately and I usually put it on the charger around 15 percent.
Yes, I"m not a heavy user usually. Depends on my work load, sometimes it only lasts two days.
I remember hearing this back in the day. Users reported that trickle charging (ie. Usb to computer) would yield better battery life.
I was curious if this would be the case when I first heard about the fast charging when the note 4 was released, but I haven't tested it yet.
http://forum.xda-developers.com/xperia-z/help/trickle-charging-improve-battery-life-t2332947
I use a spare oem battery/cradle charger. Which does not have fast charging, so the battery would technically be charged slower than through the phone with fast charging. I haven't noticed any difference in battery life between the two.
Then again, my phone usage changes by the time I swap batteries.
Sent from my Note 4.
I guess I'm different than most. It's nothing for me to kill a battery in a work day. When I'm 50% +/- I'll plug in because I never know when I'll need a full charge or where I will be an need it. When going out of town I typically will carry at least one of my two backup battery packs.
I will keep power saving mode on and my screen at full brightness. No WiFi enabled but I do use BT from time to time.
5.5 to 6 hours usage sounds about right for me. 24-48 hours on one charge and I say someone isn't using their phone enough.... LoL
Im running Pac Rom 5.1.1 on Note 4 DE and the charger definitely makes a difference.
A "normal" charger (pretty much anything under 2.1A) will charge much slower than a 2.1A charger.
mithusingh32 said:
Im running Pac Rom 5.1.1 on Note 4 DE and the charger definitely makes a difference.
A "normal" charger (pretty much anything under 2.1A) will charge much slower than a 2.1A charger.
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But have you noticed any difference in your battery life after a fast charge vs a slow charge?
Bicknasty said:
But have you noticed any difference in your battery life after a fast charge vs a slow charge?
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Click to collapse
You guy need to repeat this charging business in a scientific test manner.
For example.
1) Discharge to 50%-80% (choose a level.)
2) Slow charge to 100%.
3) Run a loop of a video at some preset brightness, not auto, until the battery is at 50%-80% again. Note the time.
4) Fast charge to 100%.
5) Repeat 3 in the exact same way.
Then compare the times of video playback for the two charging techniques.
My guess is that if you were to do it right, you would get identical results.
nabbed said:
You guy need to repeat this charging business in a scientific test manner.
For example.
1) Discharge to 50%-80% (choose a level.)
2) Slow charge to 100%.
3) Run a loop of a video at some preset brightness, not auto, until the battery is at 50%-80% again. Note the time.
4) Fast charge to 100%.
5) Repeat 3 in the exact same way.
Then compare the times of video playback for the two charging techniques.
My guess is that if you were to do it right, you would get identical results.
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You'd also have to play a movie that is stored on phone and go on airplane mode, since signal strengths change power usage of radio.
Slow and steady wins the endurance race
Owners of electric rc cars/planes often charge lipo batteries to tailor their output for various track conditions. Faster higher voltage charges are more punchy and have increased output but suffer shorter run times. Slower lower voltage = milder output and longer run times.
Jugger naut said:
Owners of electric rc cars/planes often charge lipo batteries to tailor their output for various track conditions. Faster higher voltage charges are more punchy and have increased output but suffer shorter run times. Slower lower voltage = milder output and longer run times.
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Slower or faster discharge in an electrical motor depends on how much and how fast the motor can consume energy and how quickly a battery can dispense it - this relates directly to the performance of the motor like horsepower and torque. The charge used up is still the same. The amount of electricity stored depends only on the chemical composition of the battery, not on how you charge it. So faster or slower discharge still uses up the same amount of electricity - the energy stored/dispensed remains the same.
On the other hand, in a very demanding situation like RC, a faster charge can afford a faster peak discharge rate of battery. This is due to how the chemicals in LiPo batteries undergo transformations between homogeneous and heterogeneous states depending on the rate of charge. The faster the charge, the faster the maximum rate of discharge. A common misconception is that a slower rate of charge will amount to more charge stored. That is generally incorrect. Slower charging can only benefit the useful lifetime of the battery.
A display or a cpu of a smartphone are unlike an electrical motor in that they consume the same nominal amount of energy for a given task and at a very low rate. The rate of energy consumption for a smartphone is far lower than the possible rate of discharge of the battery is has.
For example, you can charge (and discharge) a battery in smartphone like S6 in about 80 minutes (and that is still FAR slower than you can possibly charge/discharge such a battery.) But the battery will last many many hours even under the heaviest load. So slower charging is pointless for smartphones.
To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Moto G6 can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!
TurboCharger is back and is very quick with the USB Type C port. I can get to 100% in about an hour, sometimes a little less.
Aeosgames said:
TurboCharger is back and is very quick with the USB Type C port. I can get to 100% in about an hour, sometimes a little less.
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Same here I find it impressive that they are beating some of the flagships!
G6 play takes about 2 hours give or take to fill a 4000 mah battery. Wish there was a feature to slow charge at night though!
Standard PD 9v charger works perfectly, and it charges quickly even with standard 5v 3A external battery
Moto G6 takes about 60 min from 10% if not using/turned off. About 90-120 minutes if you use it while charging to get to 100%. I notice it takes a solid 5-10 min from 98-100% trickle charger to peak voltage.
shawndak said:
Moto G6 takes about 60 min from 10% if not using/turned off. About 90-120 minutes if you use it while charging to get to 100%. I notice it takes a solid 5-10 min from 98-100% trickle charger to peak voltage.
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My Moto G6 takes atleast 80 minutes to get to 90% then take a lot of time to get to 100% .. like it takes less than 2 hours to get full charge..
But battery drains too fast untill 90% then drains normally ..
Please help with Charging speed...
Moto g6 plus and Xiaomi power bank 10000 pro. Quick Charge not working, 5v 1.6 may max
No issue with the autonomy.
using my quickcharge 3 accessories I get to a full charge in just over an hour using the original cable.
shawndak said:
G6 play takes about 2 hours give or take to fill a 4000 mah battery. Wish there was a feature to slow charge at night though!
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if your rooted check out build.prop tweaks there are plenty of ways to do what your looking for
It charges so fast and consumes so little I was pleasantly surprised
A bit above average, gets through the day with regular use. Nothing impressive.
The fastest charging phone I've aver had. Love it.
To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Huawei P30 Pro can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!
It seem to charge faster than the P20 Pro I had before I got this P30 Pro, I did check the charger and they are different, P30 came with charger with higher output
0-100 in less than one hour. Tried once but most often im between 20 and 90 percent and to charge it it needs around 45min or less. Great battery life and really fast charging, im super happy with it.
XDA_RealLifeReview said:
To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Huawei P30 Pro can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!
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Click to collapse
Very fast charging, just 10mins on the Super Charger gives me an extra 30% battery life.
jpf293 said:
Very fast charging, just 10mins on the Super Charger gives me an extra 30% battery life.
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Agreed, seems much faster for me I can get 20% in just the time it takes to make a coffee.
Apparently it can charge to half-full in just twenty minutes which makes sense if you're getting 30% in ten.
P30 Pro charging speed test
Charging and battery life are by far this phone's biggest strengths.
Never got it below 10% in my two months of use.
It's a monster!
The best that I had until today.
Incredible fast charge and a good battery life.
0 complaints about my P30 Pro's battery life, charging speed and even the heat afterwards.
I often forget to charge my phone and even when I do, it'll get me a third of the bar in no more than 10-15mins max which is more than enough to shower and get ready for work
It gets hot
Is it possible to disable fast charge when charging during night?
Leoxur said:
Is it possible to disable fast charge when charging during night?
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If u r using supercharger then no. Im using wireless charger to caherge it during night.
Not sure how anyone can rate it less than 5.
At least coming from a Pixel, the charge speed is incredibly fast. Combining the charging speed and the battery, I no longer need to charge overtnight but can start charging when I wake up and go to work with ~70 % battery and not worry about a thing.