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For cryin' out loud, I'm tired of watching my battery drain while plugged into the supplied USB charger. It's ridiculous. I've never owned a portable device that discharged under normal use when plugged into its supplied AC adapter. If I want to spend 15 hours a day playing Angry Birds, it should be possible when I have a power source which is virtually unlimited. Twice, I've started the day with a full battery, had the device plugged in to the supplied 2 amp charger all day, and had <10% left on the battery when I went to bed. (No, I don't actually play Angry Birds for more than a few minutes at a time but I do use the device a lot.)
jtown said:
For cryin' out loud, I'm tired of watching my battery drain while plugged into the supplied USB charger. It's ridiculous. I've never owned a portable device that discharged under normal use when plugged into its supplied AC adapter. If I want to spend 15 hours a day playing Angry Birds, it should be possible when I have a power source which is virtually unlimited. Twice, I've started the day with a full battery, had the device plugged in to the supplied 2 amp charger all day, and had <10% left on the battery when I went to bed. (No, I don't actually play Angry Birds for more than a few minutes at a time but I do use the device a lot.)
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Click to collapse
I don't have that problem. You do know that your device will wait till it drops some percentage before it starts charging again. It won't keep it at 100% the whole time... Is meant to conserve your battery life
smartadmin said:
I don't have that problem. You do know that your device will wait till it drops some percentage before it starts charging again. It won't keep it at 100% the whole time... Is meant to conserve your battery life
Click to expand...
Click to collapse
Let's pretend I've got just a little experience with portable devices. The standard is to float between 95 and 100% charge and just call it "charged" once it's bounced off 100% the first time.
Here's a test you can do that requires no time on your part. Set it up to play a long movie while it's plugged in. Look at the charge level after it's been going for a couple of hours. And you don't have to take my word for it. I'm hardly the only person complaining that the supplied charger is not capable of keeping up with the device's power requirements.
If you are seeing power drop during normal use while plugged in I'd talk to Google. You may have a defective unit. Mine doesn't do that and I regularly see 20+ hour days with normal use unplugged and usually with some video, browsing, games etc.
Take note off when you see the drop, how much you lose over a given amount off time and call Google and see if this is expected. I'm sure they will help. They have been very responsive when I've called.
Sent from my Nexus 10 using Tapatalk 2
groaner said:
If you are seeing power drop during normal use while plugged in I'd talk to Google. You may have a defective unit. Mine doesn't do that and I regularly see 20+ hour days with normal use unplugged and usually with some video, browsing, games etc.
Take note off when you see the drop, how much you lose over a given amount off time and call Google and see if this is expected. I'm sure they will help. They have been very responsive when I've called.
Sent from my Nexus 10 using Tapatalk 2
Click to expand...
Click to collapse
I will watch like 1 hour of Streaming Vid's and loose like 4-5% while plugged in.
100% brightness causes my device to use more power then what's being supplied from the wall charger, and a few other people have confirmed similar incidents as well.
Max your brightness, and then go play a 3D game, while being plugged into the wall charger, and watch the percentage drop still
My tablet lasts a few days at least before needing a charge. I plug it in over night and it charges to full. I couldn't be more happier with it considering it is not self-sufficient.
Mine drops a few % per hour in use with the stock charger connected. Brightness at 50%, WiFi on, BT off. I'm not going to whine about it, but its the only thing that's not great with this tab.
Sent from my Nexus 10 using XDA Premium HD app
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
I've read on an Ipad forum that about 10-15 hours charging are normal (the Ipad 4 has a 42,5Wh battery), and their chargers give as much Watt as our Nexus chargers.
One thing is clear, you can't increase the voltage. That would kill your Nexus right away.
My Samsung charger I recieved with my Nexus 10 says 5V out and 2A.
5*2= 10W.
Isn't that the same rates that other tabs have, even if they got special chargers?
So, the only thing the POGO-charger could raise, is the amount of current.
Even if you had a 10A charger, if the Nexus cant use more than 2A, it wouldn't get anymore amps than 2.
If the kernel on the Nexus doesn't support any higher charger rates, then you cant change anything.
There is a reason why the manufacturers have set 5V as standard - to make it work together with USB.
Battery Specs: Samsung Li-Ion 3.75V 22.75Wh 9000 mah.
So, it's easy. If you had a 1W charger, it would take 22,75 hours to get a fully charged battery.
In theory, it should take 2,75 hours to fully charge the Nexus 10 battery, but we don't turn it off, we use it while charging, it uses background sync and I dont know what the efficiency rating is on the charger or the Nexus.
You know you could feel some heat on the back of the Nexus 10 after some usage?
That's some of the battery's energy that spoils into heat, meaning that there are power losses.
It's normal though, we don't have anything yet on earth that could convert 100% energy from one form to another.
You could compare it to a car, you need a cooler-system to remove the excessive heat from the engine.
Even if your Nexus is far more efficient.
Olaeli said:
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
I've read on an Ipad forum that about 10-15 hours charging are normal (the Ipad 4 has a 42,5Wh battery), and their chargers give as much Watt as our Nexus chargers.
One thing is clear, you can't increase the voltage. That would kill your Nexus right away.
My Samsung charger I recieved with my Nexus 10 says 5V out and 2A.
So, the only thing the POGO-charger could raise, is the amount of current.
Even if you had a 10A charger, if the Nexus cant use more than 2A, it wouldn't get anymore amps than 2.
Click to expand...
Click to collapse
Please do not speculate about how much current can go through the pogo connection. Speculation is worthless and helps nobody. The fact that the included charger only puts out 2 amps probably has to do with limitations of the USB connection. But I'm speculating. See how pointless that is? The fact that one connection is limited to 2 amps doesn't mean all power connections are limited to 2 amps.
And where did I say anything about increasing the voltage? I'm not an idiot and didn't suggest such a stupid thing.
As for temperature, that can easily be monitored during charging and the current can be reduced if it gets too high. You are aware that there is a temperature sensor for the battery, right?
None of which has a darn thing to do with my opinion that it's unacceptable to produce a device that uses more power than it can get from its AC adapter. If there really is no way to run the Nexus 10 at full tilt without supplementing the AC adapter with battery power, Samsung should have addressed that problem before going into production with this unit. This isn't a $150 entry level device. It's the Android flagship.
Olaeli said:
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
Click to expand...
Click to collapse
A person that supposedly has said charger mentioned that it seemed to charge faster.
jtown said:
Please do not speculate about how much current can go through the pogo connection. Speculation is worthless and helps nobody. The fact that the included charger only puts out 2 amps probably has to do with limitations of the USB connection. But I'm speculating. See how pointless that is? The fact that one connection is limited to 2 amps doesn't mean all power connections are limited to 2 amps.
And where did I say anything about increasing the voltage? I'm not an idiot and didn't suggest such a stupid thing.
As for temperature, that can easily be monitored during charging and the current can be reduced if it gets too high. You are aware that there is a temperature sensor for the battery, right?
None of which has a darn thing to do with my opinion that it's unacceptable to produce a device that uses more power than it can get from its AC adapter. If there really is no way to run the Nexus 10 at full tilt without supplementing the AC adapter with battery power, Samsung should have addressed that problem before going into production with this unit. This isn't a $150 entry level device. It's the Android flagship.
Click to expand...
Click to collapse
Please, you started speculating about a high-current POGO-charger that doesn't exist.
Sure, you didn't mention the voltage, but I ve seen comments about it before, so I just wanted to make it clear.
And I didn't say the temperature was a problem either, just that it lowers the efficiency of the charger and the device.
Samsung maybe didn't know there was a charging problem.
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
And I know, this is supposed to be a flagship, but what everyone forgets is that it's much cheaper than other brands.
I was looking forward to buy a ASUS TF700 with keyboard at almost twice the price as the Nexus 10 before I read about the Nexus.
Even if it doesn't justify the charging problem, you could try to adapt to the circumstances until there's a solution.
When I'm low on battery, I let the device charge and do something else for a change.
Sent from my Nexus 10 using xda app-developers app
Edit: If you look at the pictures of the POGO-charger that's across the internet, the charger is still only 5V, 2A.
Olaeli said:
Please, you started speculating about a high-current POGO-charger that doesn't exist.
Sure, you didn't mention the voltage, but I ve seen comments about it before, so I just wanted to make it clear.
And I didn't say the temperature was a problem either, just that it lowers the efficiency of the charger and the device.
Samsung maybe didn't know there was a charging problem.
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
And I know, this is supposed to be a flagship, but what everyone forgets is that it's much cheaper than other brands.
I was looking forward to buy a ASUS TF700 with keyboard at almost twice the price as the Nexus 10 before I read about the Nexus.
Even if it doesn't justify the charging problem, you could try to adapt to the circumstances until there's a solution.
When I'm low on battery, I let the device charge and do something else for a change.
Sent from my Nexus 10 using xda app-developers app
Edit: If you look at the pictures of the POGO-charger that's across the internet, the charger is still only 5V, 2A.
Click to expand...
Click to collapse
I have a nexus 10, nexus7, and a Tf700. I am noticing slightly faster charging on the n10 using the Tf700 ac adapter. The same is true when trying to charge my tf700. The stock samsung n10 ac adapter charges it slower than the asus transformer adapter. The same is true with my nexus 7 adapter. Ive used the n7 adapter to charge my tf700 and it was not as quick a charge. Meanwhile all 3 units are rated for 5v 2amp.
Olaeli said:
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
Click to expand...
Click to collapse
I wonder what all they did test if they somehow managed to miss that...
joe1l said:
I have a nexus 10, nexus7, and a Tf700. I am noticing slightly faster charging on the n10 using the Tf700 ac adapter. The same is true when trying to charge my tf700. The stock samsung n10 ac adapter charges it slower than the asus transformer adapter. The same is true with my nexus 7 adapter. Ive used the n7 adapter to charge my tf700 and it was not as quick a charge. Meanwhile all 3 units are rated for 5v 2amp.
Click to expand...
Click to collapse
Could be possible the N10 charger isn't actually putting out 2A? Might need a multimeter or something to verify for sure though...
I am currently out of town so keep in mind I didn't have a chance to dig too deep but I've given the kernel a quick look through.
There is no such thing as the "high current pogo charger." The pogo pins accept 2A max and appears to be ~5V. The USB connector has the same limits.
I also took a look at the current at the battery to make sure the charger was being detected correctly. My 1A Samsung non-Nexus 10 charger seems to supply ~900ma to the battery which is as much as you should expect out of a 1A charger. My Nexus 10 charger supplies ~1600ma to the battery. This number seems slightly low but at least indicates the charger is detected correctly.
*If* the pogo charger does indeed charge faster, it will likely be because the pogo charger is able to supply some current that is asymptotically closer to 2A. In other words, it will not charger much faster than the USB charger.
On the other hand, the pogo charger will still be nice to have as it will allow simultaneous usage of USB OTG and charging.
Like I said before, I was unable to dig very deep because I'm out of town and browsing sysfs and kernel source on a tablet isn't the best experience. So, the info I found might not be 100% correct.
dalingrin said:
There is no such thing as the "high current pogo charger." The pogo pins accept 2A max and appears to be ~5V.
Click to expand...
Click to collapse
Please show some proof/references for this statement.
Valynor said:
Please show some proof/references for this statement.
Click to expand...
Click to collapse
There are many indicators throughout the kernel but for brevity I'll post what I think is the most concise.
https://github.com/CyanogenMod/andr...ng/arch/arm/mach-exynos/board-manta-battery.c
Line 773-776
Sets the current to 500ma if USB is detected on the pogo or 2A if AC is detected.
Well if you're reading 1600ma using the standard ac adapter that comes with the N10 and possibly closer to 2000ma (say 1900ma) using the pogo, then that is 1/5 faster charging. In terms of time that is quite a saving.
Of course, that is all speculation
USB current limits
I thought I'd post this as information I found while doing a spot of light reading
The current specification of a USB 2.0 port can be a maximum of 1.8A. Within Constraints.
"Battery Charging Specification 1.1: Released in March 2007.
A usb charging port places a termination resistance between D+ and D- to allow the maximum 1.8A", meaning that at this current, there can be no data transmission.
This appears to be increased for USB 3.0 standard.
"Battery Charging Specification 1.2: Released in December 2010.
Several changes and increasing limits including allowing 1.5A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5A and allowing a maximum current of 5A."
citations come from documents here:
http://www.usb.org/developers/devclass_docs
As POGO pins do not have to follow any specification the only limit is the current the board & charging circuit can handle.
Look at the specs on the wall plug in unit. It's not a charger it's a 5V power supply and the charger is inside the N10. However the charger is setup determines the charging rate. Like mentioned above, it may not matter if you "could" use a 10A at 5V power supply.
Hi all,
There have been many posts about Nexus 5X wall chargers and their ability to "properly' support rapid charging the same as the original 5X chargers do.
My conclusion seems to be nothing does rapid charging on the 5X as well as an original Google Nexus 5X charger.
I have two 5X's and one of the original chargers has just died.
Any suggestions (preferably with AUS plug configuration)? Do the later Pixel chargers definitely work on the 5X (to the standard of the 5X chargers!)?
I don't quite understand why Google is reluctant to answer these questions, or even why it should be so hard to get an 18W USB-C charger that is compatible with the 5X (given the 5X has been around for 2 or 3 years now!).
Thanks in advance!
Cheers
...Steve
I have replaced my 5X with a Pixel 3. I just tried charging the 5X (which was at 66% battery) with the Pixel 3 charger and the 5X switched very quickly between "Charging" and "Charging Rapidly" before finally settling on Charging Slowly (280 mA or so). I would have expected it to at least charge at its normal rate (about 1400 mA in my experience). So don't buy the Pixel 3 charger!
Jacquestrapp said:
I have replaced my 5X with a Pixel 3. I just tried charging the 5X (which was at 66% battery) with the Pixel 3 charger and the 5X switched very quickly between "Charging" and "Charging Rapidly" before finally settling on Charging Slowly (280 mA or so). I would have expected it to at least charge at its normal rate (about 1400 mA in my experience). So don't buy the Pixel 3 charger!
Click to expand...
Click to collapse
Thanks for that. Doesn't bode well for backward compatability
Cheers
...Steve
I use a chinese dodocool charger (da101w european version, was going to put a link but recent account..) and it works pretty well (even while using both usb ports)
Never tested the qc3 though
rbenmm said:
I use a chinese dodocool charger (da101w european version, was going to put a link but recent account..) and it works pretty well (even while using both usb ports)
Never tested the qc3 though
Click to expand...
Click to collapse
Thanks rbenmm
I've tried various non-OEM chargers and even the expensive ones that do trigger "Rapid Charging" message charge slower than the OEM version.
Cheers
...Steve
To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the Xiaomi Poco F2 Pro (Redmi K30 Pro) can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!
With the supplied charger and cable the charging time is very impressive ("Turbo Charge") with a normal QC3.0 charger charge time is still very good but comparable to most other QC3.0 devices.
Something to note is the device does get noticeably warm when using the supplied charger in the "Turbo Charge" mode.
Takes about an hour for me with included charger.
murakh said:
With the supplied charger and cable the charging time is very impressive ("Turbo Charge") with a normal QC3.0 charger charge time is still very good but comparable to most other QC3.0 devices.
Something to note is the device does get noticeably warm when using the supplied charger in the "Turbo Charge" mode.
Click to expand...
Click to collapse
yes i noticed it get warm to hot-ish
isn't that bad for the battery?
moreover i noticed that if you charge while turned off it does not get hot
itti_sam said:
yes i noticed it get warm to hot-ish
isn't that bad for the battery?
moreover i noticed that if you charge while turned off it does not get hot
Click to expand...
Click to collapse
That's normal because you're not using it, if using while charging it will be hot as your running apps, tasks etc... at the same time. This will increase the heat as sensors will be running also.
Has anyone tried to use other cables that has the same turbo charge effect like the included cable? The included cable is too short, usually I use 2 meters long cable.
I have tried the baseus 5A 40W cable but it only support quick charging and not turbo.
I've tested charging wattage using original 33W charger and original USB cable via specialized USB tester, and I noticed it provides only 25W (about 9.6V/2.65A). It shows "Turbo Charge" indeed, but it's still only 75% efficient. Anyone care to explain this? Is this normal? I've read that only Zoom edition can be charged at 33W, so I expected non-Zoom edition will charge at least with 30W. I tried two other USB cables, and still only 25W. Later today I will try to charge it with Blitzwolf 30W PD charger and see how it goes with that one...
I haven't really tested charge speeds. So far the battery life has been exceptional and the main reason I opted for this phone without the high res screen and refresh rate, as see battery as more essential. I would much prefer charging at a slow speed to preserve battery life. A good app for this is AccuBattery. It measures how many mAh's being charged and discharged after each charge and keeps a graph. It will estimate battery health also.
Yeah I know about AccuBattery, I've been using it in the past. But a real physical tester device is always more precise. I do sw/hw development for a living so I know for a fact. Indeed, battery life is very good because optimized MIUI and pretty big battery, but it would be even better if charging speed was also up to the specs. Meanwhile I've tested charging speed using Blitzwolf 30W PD2.0 charger (K30Pro should support PD3.0 and be backward compatible), and situation is even worse - only about 15-16W at QC3.0 I believe. So no Turbo Charge was initiated. I mean 25W with original charger is still good, but I expected advertised charging speed. I'll do more tests when I catch some time.
Thats normal, because it don't charge all the time with 30W. Compare it with WARP Charge 30T it is faster. OnePlus 8 got 30W and 4300 mAh, F2 Pro is faster with bigger bettery but it's almost the same.
How old is your Blitzwolf charger?
I know it shouldn't charge @30W above 80-90%, but sure it should at 20-ish where I'm at about now. It's also not even cool to the touch, so there's no apparent reason to slow it to 25W. My Blitzwolf charger is about a year old, but I only used it couple of times, so it should be as good as new.
itti_sam said:
yes i noticed it get warm to hot-ish
isn't that bad for the battery?
moreover i noticed that if you charge while turned off it does not get hot
Click to expand...
Click to collapse
Batteries don't like heat but it is actively monitored and it will slow down charging when it crosses temperature threshold.
That's why I mentioned my phone is not even cool to the touch (let alone hot), so my case is not temperature related. I'll try to charge it while turned off, though it was pretty much in idle doing nothing when I did the test, ie. not stressed at all by any factor. All in all, I mean if everyone else gets 25W out of original charger, I won't bother anymore. Also, if it charges from 10-90% in around 1 hour, I won't waste any more time on this either, since it's good enough for me. I was just curious why it charges at 25W, when 30W (and 33W for Zoom edition) was advertised. Altough it wouldn't be the first time something was advertised at launch, and not achievable in real-case scenario.
Burs said:
I'll try to charge it while turned off...
Click to expand...
Click to collapse
Fun fact: phone doesn't charge when powered off?! That's a first. Is it just me, or am I getting too old? For the whole time I'm talking about my Redmi, not to confuse it with Poco, if that matters at all. Maybe Poco works differently.
On my Huawei device you also can not turn off an charge but this starts with Android 10.
takes about 1 hour and 20 minutes for me, I think the high temperature here, summer season, is the reason for this slow charging speed.
From 20-100% in about an hour. Few minutes less actually. Battery is big, that's all ok.
F2 turn off and are dead with 0% (can't turn on). Timer 60 min. and after 60 min. I got 96% with original charger. The phone don't turn on, like it always do.
@Burs a friend told me "on my Anker charger I only can use PD over the third usb port, with the type c port it will charge over QC 3.0 and not over PD" maybe thats why you get ~16W?
When my Redmi was turned off completey, it was hooked up to my USB tester for about a minute. I doubt it would trigger after some minutes, and only then start charging. For the whole time it was connected, I was getting 5V / 0.015A readings on the display. That's pretty much USB tester drawing the power from the phone battery, not the charger! So that would mean charging was completely disabled making the phone behave as a power bank lol. Weird enough, right?
My Blitzwolf charger has only two ports. One PD2.0 (USB-C) and one QC3.0 (USB-A). I've tried three sets of USB cables (one even 5A) on both ports, and best I could get out of it was about 15W. I think I'll have to order another one with PD3.0 and Turbo Charge compatibility.
Heh I'm planning on just using my old 1A slow chargers because they're dotted around the house and work, will probably not even plug fast charger in. Magnetic cables are just so convenient.
I have the Samsung 25w charger, and when using it it appears the phone will only either cable charge or superfast charge. It wont also fast charge. I want to maximize the battery life span of the phone, and cable charging is inconveniently slow, and I figured that fast charging would be a happy medium between that and maxing it out. I was under the impression that it's the phone that dictates the rate of charge it will accept from the brick, and the brick only determines the maximum deliverable current. If I understand correctly, we can use samsung's 45w charger, but the phone will obviously only allow 25w from it. I'm puzzled why when using the 25w charger the phone can't just accept 15w when set to only fast charge. Is this a bug?
Hi,
You might plug in your phone, Go to Parameters, Section Battery, Advanced Battery, and activate Super charge and superfast charge in order using fast and supercharge with your 45W charger !
Yes, I've done that. The 25w charger will only super fast charge, but won't just fast charge. I would have thought it could either one, whichever I have it set to do.
if you want fast charge ..... deactivate superfast charge should be the solution ! Isn't it ?
Probably a firmware/software glitch.
Fast charging will not enable if battery temp is too low.
To avoid Li plating the battery temp should be a minimum of 72°F or higher, the preferred minimum is 80°F.
Using the 45 watt brick may shorten battery life.
Fast charging with the 25 watt brick appears to do little damage.
Li's prefer brief, frequent midrange charges ie 40-65%. Avoid discharging below 30% and charging beyond 90% although 80% is a better top limit.
fission6606 said:
if you want fast charge ..... deactivate superfast charge should be the solution ! Isn't it ?
Click to expand...
Click to collapse
No, if you only activate fast charge (with superfast deactivated) and use the 25w brick, the notification in the shade says cable charging, and that takes like 2hrs to charge the phone.
ac42 said:
No, if you only activate fast charge (with superfast deactivated) and use the 25w brick, the notification in the shade says cable charging, and that takes like 2hrs to charge the phone.
Click to expand...
Click to collapse
That doesn't sound like fast charging is active. It should gain about 2%@minute through most of its range except the top end where it goes to about 1%@minute.
When this doesn't work correctly it's a true pain to troubleshoot. My 10+ started dropping out of fast charging prematurely. A new 25 watt brick/cable and trying a lot of other remedies still hasn't fully restored it.
I'm curious if anyone here has a 25w brick that could confirm if this behavior is present globally, or if this is something just on my device? Only activate fast charging in the battery settings, plug the phone in with the 25w charger, and look in the notification shade and see what the charge rate is tagged as. I'd be grateful if someone would confirm this.
blackhawk said:
Probably a firmware/software glitch.
Fast charging will not enable if battery temp is too low.
To avoid Li plating the battery temp should be a minimum of 72°F or higher, the preferred minimum is 80°F.
Using the 45 watt brick may shorten battery life.
Fast charging with the 25 watt brick appears to do little damage.
Li's prefer brief, frequent midrange charges ie 40-65%. Avoid discharging below 30% and charging beyond 90% although 80% is a better top limit.
Click to expand...
Click to collapse
I have noted that you practise the same charging procedures as I have done for several years (and you obviously have done as well). With my Note9 and S8 + I used to not let it drop below 40% if I can avoid it and also not go above 80%. All this is fine and most of this we all probably learned from Battery University and Isadore Buchmann. That all said, and I am really not sure if I am keeping this phone - Decision today or tomorrow - my question comes to the matter of calibration. When I received this phone some 14 days ago I charged it to 100% but thereafter did not run it down to zero but kept it above 40% the whole time. The question I put to you (and others can learn from your response) is there a need to "calibrate" the device initially (ie run down to say 10% for example once a month) as was suggested by Buchmann probably a few years ago?
blackhawk said:
That doesn't sound like fast charging is active. It should gain about 2%@minute through most of its range except the top end where it goes to about 1%@minute.
When this doesn't work correctly it's a true pain to troubleshoot. My 10+ started dropping out of fast charging prematurely. A new 25 watt brick/cable and trying a lot of other remedies still hasn't fully restored it.
Click to expand...
Click to collapse
You and I discussed this earlier. Do you think it is the port that has become damaged? Part of the reason for my getting the wireless charger is my Note 9 is very erratic when it comes to fast charging. Cleaning out the port with a toothbrush/compressed air. rebooting...wiping cache partition, new cable etc never truly fixed it for me. I do feel that when first plugging in the S21 ultra (before going wireless) the connection seemed a lot firmer.
ac42 said:
I'm curious if anyone here has a 25w brick that could confirm if this behavior is present globally, or if this is something just on my device?
Click to expand...
Click to collapse
It does appear to be related to the Samsung 25w brick. I have the one that came with my S20U. It will "Super fast charge" my S21U no problem. If I turn off super fast charging in the phone, it only says "charging" when plugged in, and with my phone @ 65%, it said it would take well over an hour to charge (forgot the exact time). Then I took my phone w/o changing any settings to a generic 18w QC3 brick, and it said "fast charging", and said it would take 44 mins to complete.
Ive seen this same type of issue as well with 2 different chargers. One charger (45w pd) will fast charge with super turned on but not fast, notification only says fast charge. The second (39w qc3) will fast charge with regular fast charging turned on, but turning on super does nothing. Charge times are the same with both chargers on regular charging and fast, with 0 differemce between fast charging and super.
peterg21 said:
You and I discussed this earlier. Do you think it is the port that has become damaged? Part of the reason for my getting the wireless charger is my Note 9 is very erratic when it comes to fast charging. Cleaning out the port with a toothbrush/compressed air. rebooting...wiping cache partition, new cable etc never truly fixed it for me. I do feel that when first plugging in the S21 ultra (before going wireless) the connection seemed a lot firmer.
Click to expand...
Click to collapse
I'm as clueless as you at this point unfortunately.
My port is good, cable/charger, tried hard reset, cleared system/akp caches, did the recall thing and so on.
I'm wondering if it's a battery fault. Do older batteries go into fast charging the same as newer ones? It's almost as if it's throttling the fast charging, sometimes it's full bore then it drops out to 1%@45 seconds then to 1%@minute.
Or is it a calibration ie it thinks it's at 90% when it's only at 70%?
The only I haven't done is a factory reset, lol.
All this started one night when it was slow charged to 100%. WTF?
TFF the curse of technological Beast!
Guess I'll try recall again.
dscline said:
It does appear to be related to the Samsung 25w brick. I have the one that came with my S20U. It will "Super fast charge" my S21U no problem. If I turn off super fast charging in the phone, it only says "charging" when plugged in, and with my phone @ 65%, it said it would take well over an hour to charge (forgot the exact time). Then I took my phone w/o changing any settings to a generic 18w QC3 brick, and it said "fast charging", and said it would take 44 mins to complete.
Click to expand...
Click to collapse
Right on. Sounds like it's not just my phone. That's a relief. It's puzzling why the phone can't also fast charge with that brick. Perhaps it's simply a bug that Samsung either never noticed, or it isn't a priority to them. It would be nice if we could take advantage of the different settings without having to have two different bricks sitting around.
I think I figured it out. The fast charging setting is for the old classic fast charger. If you connect your phone to that one, you'll see it says it's fast charging. If you don't have fast charging turned on, it'll prompt you to turn it on to use that charger at it's maximum capability. If you use one of the newer Samsung C to C bricks, it's going to do the super fast charging.
I am currently using this Baseus charging plug and get full range of charging options - fast / super fast.
Thought I would try some I have hanging around before buying a Samsung one.
Baseus USB C Charger 120 W with GaN Tech Power Delivery USB-C Power Supply Compatible with MacBook Pro/Air, iPad Pro, iPhone 12 Pro Max/11 Pro Max/XS Max, USB C Laptops, Surface Pro, Galaxy, Huawei: Amazon.de: Computer & Accessories
Baseus USB C Charger 120 W with GaN Tech Power Delivery USB-C Power Supply Compatible with MacBook Pro/Air, iPad Pro, iPhone 12 Pro Max/11 Pro Max/XS Max, USB C Laptops, Surface Pro, Galaxy, Huawei: Amazon.de: Computer & Accessories
www.amazon.de
a.gordon1989 said:
Ive seen this same type of issue as well with 2 different chargers. One charger (45w pd) will fast charge with super turned on but not fast, notification only says fast charge. The second (39w qc3) will fast charge with regular fast charging turned on, but turning on super does nothing. Charge times are the same with both chargers on regular charging and fast, with 0 differemce between fast charging and super.
Click to expand...
Click to collapse
XDA just covered this in their article:
Fast Charging Explained: The slowest to the fastest Fast Charging technologies
Curious about fast charging? Here's everything you need to know about fast wired charging standards and how to pick the best charger!
www.xda-developers.com
Unless a charger has USB-PD PPS they will only FAST Charge @ 18w with fast charge on (super fast on/off wont matter as it will be off). If you are getting super fast charging then you are getting the expected 25w which is totally fine and not bad for battery. You will get super fast with the samsung 25w adapter and maybe the previous series 45w adapter.
I have a 45W USB-C PD port as part of an Anker PowerPort and also the 18W charger that came with my Pixel 5. Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?
Tmel14 said:
I have a 45W USB-C PD port as part of an Anker PowerPort and also the 18W charger that came with my Pixel 5. Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?
Click to expand...
Click to collapse
No huge charging improvement. It most likely will degrade the battery faster.
I use only the Samsung 25w bricks because they are known good and relatively cheap.
Just picked up a 25w brick and cable for $20.
The amount of trouble a defective charging hardware can cause means I won't consider using 3rd party chargers/cables for fast charging.
Fast charging is a nightmare to troubleshoot as I'm learning now... will see if a couple full 100-0% charge cycles get it or not.
It's time consuming and irritating.
thegr8anand said:
XDA just covered this in their article:
Fast Charging Explained: The slowest to the fastest Fast Charging technologies
Curious about fast charging? Here's everything you need to know about fast wired charging standards and how to pick the best charger!
www.xda-developers.com
Unless a charger has USB-PD PPS they will only FAST Charge @ 18w with fast charge on (super fast on/off wont matter as it will be off). If you are getting super fast charging then you are getting the expected 25w which is totally fine and not bad for battery. You will get super fast with the samsung 25w adapter and maybe the previous series 45w adapter.
Click to expand...
Click to collapse
Thanks for posting the link to that article. It clears some things up. Charging standards have become rather confusing with all the proprietary standards. This makes me feel more comfortable using the 25w super fast setting on the s21 ultra.
I'm looking for recommendations for a charging station (or multi port charger) that will activate super fast charging on my S21 Ultra. I'm looking for at least 3 or 4 ports. I see a lot of stuff that say up to 100 watt charging but none really say if they activate super fast charging on samsung phones. If it can 45 watt super fast charge my tab s7 plus also would be a big bonus.
mmafighter077 said:
I'm looking for recommendations for a charging station (or multi port charger) that will activate super fast charging on my S21 Ultra. I'm looking for at least 3 or 4 ports. I see a lot of stuff that say up to 100 watt charging but none really say if they activate super fast charging on samsung phones. If it can 45 watt super fast charge my tab s7 plus also would be a big bonus.
Click to expand...
Click to collapse
What is your country ?
If by any chance you are from india , get this , i have it and it does superfast charging at 25w ( max current for s21 ultra )
AMX XP 60 PD 4-Port 62W Wall Charger (45W USB-C Power Delivery PPS 3.0) & (17W USB-A 3-Port) - Compatible with Galaxy/Note, iPhone 12, iPad Air/Pro, MacBook Air/Pro, LG, ASUS, Pixel, Others : Amazon.in: Computers & Accessories
AMX XP 60 PD 4-Port 62W Wall Charger (45W USB-C Power Delivery PPS 3.0) & (17W USB-A 3-Port) - Compatible with Galaxy/Note, iPhone 12, iPad Air/Pro, MacBook Air/Pro, LG, ASUS, Pixel, Others : Amazon.in: Computers & Accessories
www.amazon.in
25 watts is as much as I go with for this generation of Li cells.
45 watts doesn't charge that much faster and creates even more heat, stressing the battery especially on the deeper charge cycles.
Just replaced a swollen Li on my Note 10+.
I'm lucky it didn't damage the display... that's what you're risking. The bag pack Li's aren't very robust... I torn one apart recently.
If you go with none OEM cables and chargers they may or may not work. Troubleshooting fast charging issues is a real pain as it is.
I just got done learning that
Adding more potential variables will only add to the trouble when troubleshooting.
aj7400 said:
What is your country ?
If by any chance you are from india , get this , i have it and it does superfast charging at 25w ( max current for s21 ultra )
AMX XP 60 PD 4-Port 62W Wall Charger (45W USB-C Power Delivery PPS 3.0) & (17W USB-A 3-Port) - Compatible with Galaxy/Note, iPhone 12, iPad Air/Pro, MacBook Air/Pro, LG, ASUS, Pixel, Others : Amazon.in: Computers & Accessories
AMX XP 60 PD 4-Port 62W Wall Charger (45W USB-C Power Delivery PPS 3.0) & (17W USB-A 3-Port) - Compatible with Galaxy/Note, iPhone 12, iPad Air/Pro, MacBook Air/Pro, LG, ASUS, Pixel, Others : Amazon.in: Computers & Accessories
www.amazon.in
Click to expand...
Click to collapse
Thank you. I'm in the United States.
blackhawk said:
25 watts is as much as I go with for this generation of Li cells.
45 watts doesn't charge that much faster and creates even more heat, stressing the battery especially on the deeper charge cycles.
Just replaced a swollen Li on my Note 10+.
I'm lucky it didn't damage the display... that's what you're risking. The bag pack Li's aren't very robust... I torn one apart recently.
If you go with none OEM cables and chargers they may or may not work. Troubleshooting fast charging issues is a real pain as it is.
I just got done learning that
Adding more potential variables will only add to the trouble when troubleshooting.
Click to expand...
Click to collapse
Luckily i have dozens of oem Samsung usb cables.
mmafighter077 said:
Luckily i have dozens of oem Samsung usb cables.
Click to expand...
Click to collapse
The original one that came with my 10+ after a year and a half is still functional.
It's gotten heavy use.
It outlived the battery
The 25 w brick/cable can be had for $20 now... I know because I pick up a pair when troubleshooting fast charging... now I have two. Yes, well... I'm more conservative now with charging limiting the time/% as well temperature and rarely going under 40% or over 80%.
Most times I use a damp microfiber cloth to cool the charge cycle as even a 20% midrange charge can top out at over 100°F. New batteries soak up more current faster and the waste heat comes with that when fast charging.
Li charging itself is a weak endothermic reaction but the resistive heat produced greatly outweighs that lesser factor.
My thoughts on the charging situation with the S21 Ultra
In the newer S21 series (as with the Note 20 Ultra), 45W super fast charging 2.0 support has been dropped (I suspect it has something to do with the findings stemming out of the Note 7 battery fiasco investigation). From the reports I've read, they seem to have invested a lot of money and resources in studying battery safety after that embarassment, and have a new lab dedicated to studying battery and charging safety.
Max supported input wattage on the S21 series is 25W (so called superfast charging) and then there is the regular 15W "fast" charging. There's also 9W and 15W wireless charging (latter only available vis proprietary Samsung wireless charger)
There isn't a very big difference in the charging times between the OEM 15W and 25W Samsung adapters - there's a differnce yes, but its not a huge margin - definitely not what a 66% higher wattage charger should provide (25W over 15W).
Heating during cable charging is present on the S21U both with the 15W and the 25W charger, way more than what I have experienced with Warp charge on my OnePlus phone. This is despite the much higher wattage used by OnePlus, thanks to the VOOC implementation from Oppo, with lower voltages and higher amperages, and letting the charging brick do most of the thermal dissipation rather than the phone. Samsung on the other hand uses USB PD 3.0 + PPS standards.
If you're using a wireless charger without a built in fan, you get an even hotter phone than with the 25W cable charging, despite a lesser charge throughput. It's objectively worse for battery longevity because the battery is kept at the higher temperatures much longer due to the slower charging speed. Heat and Li batteries don't mix well.
From my limited experience with various charging standards and different phone brands, my conclusions about the S21 ultra are as follows:
1. Regular cable charging works just fine on the S21U. I use regular QC 2.0 chargers lying around at home and they work fine for charging up the phone without wearing out the battery. I plug in the phone whenever i am not using the phone, like for 15 to 20 mins at a time and most battery experts say that multiple small top up charges are better than a high stress pedal-to-the-metal full charge.
2. 15W is the fast charger of choice that I would charge the S21 Ultra with, if I needed a quicker boost on a nearly flat battery. 25W performance doesn't justify the extra cost of the brick. If you already have a 25W charger, then use that - what I'm saying is, there's no point buying one thinking it will charge 66% faster than the 15W charger.
3. I avoid Wireless charging on the S21U with third party Qi chargers (these only charge at 10W or lower). The phone really heats up depending on the charger - and then safety protocols slow down the charging speed even further on an already inefficient power delivery system. I would either use the OEM Samsung fast wireless charger (15W) with built in cooling, or none at all. This ensures minimum charge time to full and active fan cooling - least thermal stress is what I'd look for here.
4. My phone's battery charge level usually ranges from 20% to 90% - i try not to let it run down to flat or charge up all the way to 100%. If it does so occasionally, it's fine - the phone can handle it. I just try not to let it happen all the time. Have you noticed how fast the battery falls from 100 to 99? and then to 95... but it takes way longer for it to drop after that? 100% charge is a very unstable state for the battery 85-90% is the sweet spot. And around 50% is the most stable state. This is why Li Ion batteries are shipped at near 50% charge by most smartphone manufacturers to provide longest shelf life (the company has no way of knowing how long the phone is going to sit on the shelves before being sold)
5. I don't charge my phone overnight. I know that good chargers stop supplying power once battery reports 100% charge, but it starts charging up again when battery drops to 99%, charges it back to 100 in a few mins, then it cuts out and battery drops again and the cycle continues many times during the night till you take your phone off the charger. We know 0% and 100% battery level are the highest stress states for a battery - yet we leave the charger connected overnight, maintaining the battery at 100% for 6 to 8 hours at high electrochemical stress level.
All this is inconsequential if you change phones every year. You can do anything with your phone if you aren't planning to keep it for very long. I personally use my phones for 2-3 years and like to keep the battery is as good shape as possible. The above charging discipline has helped me maintain good battery health on all my devices for an average of 2.5 years each.
Some readers may not agree with my assessment and recommendations. Please feel free to disregard them and follow whatever has been working for you over the years. My use case and lifestyle may be very different from yours and consequently your charging habits will vary. That is fine.
This is not a directive from me to anyone, nor am i a battery expert. These are just my observations and advice for people that may be looking for it. If you've already figured out your best cahrging protocol, I'm happy it works for you.
enigmaamit said:
My thoughts on the charging situation with the S21 Ultra
snipped...
This is not a directive from me to anyone, nor am i a battery expert. These are just my observations and advice for people that may be looking for it. If you've already figured out your best cahrging protocol, I'm happy it works for you.
Click to expand...
Click to collapse
great assessment. Thank you for putting the time into writing it.
enigmaamit said:
My thoughts on the charging situation with the S21 Ultra
In the newer S21 series, 45W support has been dropped (I suspect it has something to do with the findings from the Note 7 battery fiasco investigation).
Max supported is 25W (so called superfast charging) and the regular 15W "fast" charging. There's also 9W and 15W wireless charging (latter only available vis proprietary Samsung wireless charger)
There isn't a very big difference in the charging times between the OEM 15W and 25W Samsung adapters - there's a differnce yes, but its not a huge margin - definitely not what a 66% higher wattage charger should provide (25W over 15W). At best you get a 10% faster charge with the 25W brick.
Heating is present on the S21U both with the 15W and even more so with the 25W charger, way more than what I have experienced with Warp charge on OnePlus. This is despite the much higher wattage used by OnePlus, thanks to the VOOC implementation from Oppo, where the charging brick does most of the thermal dissipation rather than the phone. Samsung on the other hand uses USB PD and PPS standards.
If you're using a wireless charger without a built in fan, you get an even hotter phone than with the 25W cable charging, despite a much lesser charge throughput. It's objectively worse for battery longevity because the battery is kept at the higher temperatures much longer due to the slower charging speed. Heat and Li batteries don't mix well.
From my limited experience with various charging standards and different phone brands, my conclusions about the S21 ultra are as follows:
1. Regular cable charging works just fine on the S21U. I use regular QC 2.0 chargers lying around at home and they work fine for charging up the phone without wearing out the battery. I plug in the phone whenever i am not using the phone, like for 15 to 20 mins at a time and most battery experts say that multiple small top up charges are better than a high stress pedal-to-the-metal full charge.
2. 15W is the fast charger of choice that I would charge the S21 Ultra with, if I needed a quicker boost on a nearly flat battery. 25W performance doesn't justify the extra cost of the brick as well as the extra heat generated. If you already have a 25W charger, then use that - what I'm saying is, there's no point buying one thinking it will charge 66% faster than the 15W charger.
3. I avoid Wireless charging on the S21U with third party Qi chargers. The phone really heats up depending on the charger - and then safety protocols slow down the charging speed even further on an already inefficient power delivery system. I would either use the OEM Samsung fast wireless charger (15W) with built in cooling, or none at all. This ensures minimum charge time to full and active fan cooling - least thermal stress is what I'd look for here.
4. My phone's battery charge level usually ranges from 20% to 90% - i try not to let it run down to flat or charge up all the way to 100%. If it does so occasionally, it's fine - the phone can handle it. I just try not to let it happen all the time. Have you noticed how fast the battery falls from 100 to 99? and then to 95... but it takes way longer for it to drop after that? 100% charge is a very unstable state for the battery 85-90% is the sweet spot. And around 50% is the most stable state. This is why Li Ion batteries are shipped at near 50% charge by most smartphone manufacturers to provide longest shelf life (the company has no way of knowing how long the phone is going to sit on the shelves before being sold)
5. I don't charge my phone overnight. I know that good chargers stop supplying power once battery reports 100% charge, but it starts charging up again when battery drops to 99%, charges it back to 100 in a few mins, then it cuts out and battery drops again and the cycle continues many times during the night till you take your phone off the charger. We know 0% and 100% battery level are the highest stress states for a battery - yet we leave the charger connected overnight, maintaining the battery at 100% for 6 to 8 hours at high electrochemical stress level.
All this is inconsequential if you change phones every year. You can do anything with your phone if you aren't planning to keep it for very long. I personally use my phones for 2-3 years and like to keep the battery is as good shape as possible. The above charging discipline has helped me maintain good battery health on all my devices for an average of 2.5 years each.
Some readers may not agree with my assessment and recommendations. Please feel free to disregard them and follow whatever has been working for you over the years. My use case and lifestyle may be very different from yours and consequently your charging habits will vary. That is fine.
This is not a directive from me to anyone, nor am i a battery expert. These are just my observations and advice for people that may be looking for it. If you've already figured out your best cahrging protocol, I'm happy it works for you.
Click to expand...
Click to collapse
On my Note 10+ it fast charges at about 2%@minute until about 80%. Much faster than a 15 watt brick can at 1%@minute in snail mode.
On the N10+ it has to have a 25 watt brick for fast charging to engage. I believe this is true with all Samsung models that support fast charging.
For brief midrange charging which Li's prefer, it's perfect. A damp microfiber cloth and/or a fan to keep it cool.
The temperature rise is due to resistance mostly in the battery it's self rather than the method of charge. More VA per minute, more heat*.
Samsung ditch the 45 watt brick because it was only a small increase in speed mostly in the 5-20% charge range I believe it was. This had nothing to do with the N7 fireballs. However a full charge with a 45 watt brick is the most battery stressful charging routine.
Honestly I'm not worried about longevity of the battery on my phone. I usually only keep a phone from 6 to 8 months. I just want something that works.
mmafighter077 said:
Honestly I'm not worried about longevity of the battery on my phone. I usually only keep a phone from 6 to 8 months. I just want something that works.
Click to expand...
Click to collapse
I'm not either anymore. I now know that changing out my N10+ battery is well within my skillset comfort zone. I could switch to slow charge midrange partial charges vs fast midrange partial if I wanted maximum life.
I just don't want to get too stupid about it*.
A swollen battery is an immediate threat.
That should be a consideration as an "event" can be painful and de$tructive.
"My pants, My Pants are on fire!" Bah-ha-ha-ha
I've had things blow up on me and onto me... better think and move real fast, and be lucky.
It's always better not to test your limits as eventually you'll discover them.
*sleeping with a charging Li is a bad idea. In the very rare instance were an event to occur it could easily be the last one for you. Anyone who's been sleeping when a fire broke out knows this.
Some of us already know people who died sleeping during a fire as well. As you get older you will too
blackhawk said:
I'm not either anymore. I now know that changing out my N10+ battery is well within my skillset comfort zone. I could switch to slow charge midrange partial charges vs fast midrange partial if I wanted maximum life.
I just don't want to get too stupid about it*.
A swollen battery is an immediate threat.
That should be a consideration as an "event" can be painful and de$tructive.
"My pants, My Pants are on fire!" Bah-ha-ha-ha
I've had things blow up on me and onto me... better think and move real fast, and be lucky.
It's always better not to test your limits as eventually you'll discover them.
*sleeping with a charging Li is a bad idea. In the very rare instance were an event to occur it could easily be the last one for you. Anyone who's been sleeping when a fire broke out knows this.
Some of us already know people who died sleeping during a fire as well. As you get older you will too
Click to expand...
Click to collapse
For a 15-watt wireless charge (S21 ultra); a 25 watt wired charge (S21 ultra) and a wired charge 45 watts (TabS7+), I use this from AMAZON: AUKEY USB charger 60 W Power Delivery 3.0 - 2 USB power ports for MacBook Pro, Dell XPS, iPhone 11 Pro Max SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch
USB C Chargeur AUKEY 72W 3-port Chargeur Rapide avec 60W USB Power Delivery 3.0 Secteur Mural USB pour MacBook Pro, Dell XPS, iPhone 11 Pro Max SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch: Amazon.fr: High-tech
USB C Chargeur AUKEY 72W 3-port Chargeur Rapide avec 60W USB Power Delivery 3.0 Secteur Mural USB pour MacBook Pro, Dell XPS, iPhone 11 Pro Max SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch: Amazon.fr: High-tech
www.amazon.fr
Pascal536 said:
For a 15-watt wireless charge (S21 ultra); a 25 watt wired charge (S21 ultra) and a wired charge 45 watts (TabS7+), I use this from AMAZON: AUKEY USB charger 60 W Power Delivery 3.0 - 2 USB power ports for MacBook Pro, Dell XPS, iPhone 11 Pro Max SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch
USB C Chargeur AUKEY 72W 3-port Chargeur Rapide avec 60W USB Power Delivery 3.0 Secteur Mural USB pour MacBook Pro, Dell XPS, iPhone 11 Pro Max SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch: Amazon.fr: High-tech
USB C Chargeur AUKEY 72W 3-port Chargeur Rapide avec 60W USB Power Delivery 3.0 Secteur Mural USB pour MacBook Pro, Dell XPS, iPhone 11 Pro Max SE, Galaxy S10, iPad Pro, AirPods Pro, Pixel 4XL, Switch: Amazon.fr: High-tech
www.amazon.fr
Click to expand...
Click to collapse
15 watts, got you. I never use wireless or power charge; too inefficient.
Still considering removing that antenna. A substitute sheet of graphene might improve heat transfer performance and characteristics.