Is it the Battery or the Tablet? What is the Problem? - Galaxy Tab S Q&A, Help & Troubleshooting

Okay so I've owned my Tab S for about two years now, not even that long really, and in that time I've gone through three batteries and am on my way towards purchasing a fourth.
The problem is either they start to overheat very badly, draining the battery quickly, or the battery just starts draining fast all on it's own, even while plugged in and charging.
The other day I had my tablet plugged in and charging, and yet the battery power dropped twenty percent in less then twenty minutes. I was using the wifi, but it never used to drain this fast.
Is the problem really the batteries? Do others have to replace the battery so often?
Or is there something wrong with my tablet? Could there be a problem with it? Or is there something about the software that's the cause?
I use RR 5.8.5. Magisk 16. BeanGapps. And TWRP 3.2.1.0.
Could any of those, or a combo of any of them be causing the problem? Or what? Does anyone have any ideas?
If you need a list of apps I have installed, in case any of them might be the problem, just ask and I'll post them.

Try a different charger (Samsung) and make sure it's at least 2A
Please use the QUOTE feature when replying to me to get my attention. Thanks!

Related

Battery charging after update

Anyone else got this? My battery should be fully charged in the morning with the green light on - but the battery is 91% (or 94% or 99%). Then if I plug the charger it jumps from 91% to 100% in seconds.
Just hope its just waiting few cycles to calibrate or something... :/
Yeah, it seems to sort itself out after a few charges.
same with mine, only just happened after the update
I have something else to share about battery charging after update. I usually charge my phone from my computer's usb port during the night.
However after the update USB charging is much slower than before. It would take about 4 hours to charge from empty, but since the updates it only charges with a rate of 13% every hour so it takes more than 7 hours to fully charge from empty.
Anybody else noticed this?
zonkkk said:
I have something else to share about battery charging after update. I usually charge my phone from my computer's usb port during the night.
However after the update USB charging is much slower than before. It would take about 4 hours to charge from empty, but since the updates it only charges with a rate of 13% every hour so it takes more than 7 hours to fully charge from empty.
Anybody else noticed this?
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Click to collapse
yeah, ive had these same exact issues. its so annoying. its just not worth charging via PC usb any more
The GTalk issue is out there again, not sure if its the culprit? I have unchecked the 'automatically sign in' and logged out, but it keeps turning on and logging me in by itself. Im sure its one of the reasons for the battery drain. Anyone else with this?
This morning it dropped from 100% to 88% in less than two hours without really doing anything with the phone...
this whole 'stopping charging till 90% once its reached 100%' issue is rediculous. I cant believe that HTC have added this to the update (cos it didnt happen before) for a phone where users rarely get a days usage out of the phone battery anyway! Now you even stand the chance of starting the day with 10% less charge than you should....rediculous!
if its something they want to include then thats fine, but at least give us the option of turning it off
This is from a german forum:
Let the phone empty the battery until it switch off for its own. Switch on again and do a new boot until the phone is switch off again. When switched off charge the battery completely with the original charger.
... and the 90% issue is gone
I have a second battery I never used before. Im going to put it to charge tonight - and let it do few complete full/drained cycles. Hope works ok.
Wonder if everyone else has the persistent GTalk on? I dont want it!! Arghhhhh....
I have the same issue with mine Desire after updating last week,just get the green light for a full charge and after a few minutes I check my battery widget and lol 10 % are gone.Any chances for fixing that issue?I would appreciate if anyone give a helpful advice.thanx in advance.cheers
zahari said:
I have the same issue with mine Desire after updating last week,just get the green light for a full charge and after a few minutes I check my battery widget and lol 10 % are gone.Any chances for fixing that issue?I would appreciate if anyone give a helpful advice.thanx in advance.cheers
Click to expand...
Click to collapse
look up at post #8 and give that a try. Thats what im gonna do and im sure people will report back on here after theyve tried it to see if it works
topcaser said:
This is from a german forum:
Let the phone empty the battery until it switch off for its own. Switch on again and do a new boot until the phone is switch off again. When switched off charge the battery completely with the original charger.
... and the 90% issue is gone
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Click to collapse
this didnt work with me...still have the 90% issue
Look to this thread, we are talking about the same issue.
http://forum.xda-developers.com/showthread.php?t=689861
gyro11 said:
this didnt work with me...still have the 90% issue
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Click to collapse
The same here...
do we have new info about this issue ?
Is this such a huge issue then? I mean, sure you want it to show the correct %. But does it affect the total duration in any way?
The 10% can eventually level out when being used. I wonder if the device is at e.g. 30% it should actually be 40% in this case, or the 30% is actually quite accurate.
The % is an estimate to give a better representation how much there is left rather than just following the voltage drop. But in the end it will most probably be the voltage that makes the device decide whether or not the battery is empty.
Don't be silly, ofcourse this is a huge issue, did u ever seen such a issue on any other device, even devices of 5$ dont have this strange behavior.
Phone from such class to have such a problem, this is annoying.
And rather iPhone4 signal strenth issue i think here problem is software and it will be fixed
Comon, a 'huge issue'?! It's merely some % figure that's not shown correctly.
Oh well, I guess it's a compliment for the Desire then.. if 10% off is a huge issue, the rest can't be so bad!
Devices of $5 are really bad in showing correct percentages really. One part of the % goes fast, other slow and then suddenly fast again (you know, 1 out of 3 blocks left but flat battery in no-time, while the second block lasted hours and hours). Just because a device says it's 100% loaded, it doesn't mean it's actually correct.
That's why I wondered: Does it actually affect battery performance. If it does, then (and only then) you can call it a 'huge issue'. Otherwise I would just call it a minor annoyance. But obviously stuff like this might be personal eh!
But I'm quite convinced as well this is a software problem and can be fixed. I just don't think it will be very high on the HTC priority list
Ok, i agree its minor annoyance, but anyway it's annoying at least to me, you are right, this percentage may be fake, but for me it will be better if they show me real battery load
cheers
ps. i saw in your signature u r 1.15.405.4 - do u have this behavior on it ?
Well, the Desire is gone to be replaced now. But I didn't have this problem with my old Desire. Then that one got replaced (because HTC scratched it), and the new one did have this problem.
But now the Desire is off again because of weird touchscreen problem, so lets see how the new one holds up

What is up with my battery?

I'm a new Epic owner, still learning the quirks of this phone. I am having issues with my battery giving me a proper charge. I need a reliable GPS for a 3,000 mile road trip coming up, and this phone is all I got... so it needs to work. My issue is that the phone never seems to know how much battery it really has, and often appears to loose battery even while charging, but I'm not convinced that it actually is. So I did a little test. Went on a 15 drive, everything off except for GPS. Played music through the phone, and had the nav up the whole time, with the phone charging.
Started at 70% battery. After getting to my destination in 15 minutes, I was at 64%.
I rebooted my phone, and when it came back up, the battery was at 24%. I did some shopping, and texted my wife pretty much the whole time, phone stayed at 24% for the entire trip.
Rebooted again when I got back to the car, and it jumped up to 36%. Same deal on the ride home, music + nav up for a 15 minute ride. It was still at 36% percent this time when I got home.
So, what's with all the inconsistency here? Is this normal? Should I get a new battery? I'm running SFR 1.2 with Genocide kernel, 200-1000 conservative, and everything undervolted slightly.
Have you tried fully charging your battery and wiping the battery stats through Clockworks? Also I'll have to do some digging but if I remember correctly the reboot thing is a known bug. I believe they said it has something to do with the reboot script. I'll see if I can dig up the link for ya.
MustangMan9498 said:
Have you tried fully charging your battery and wiping the battery stats through Clockworks? Also I'll have to do some digging but if I remember correctly the reboot thing is a known bug. I believe they said it has something to do with the reboot script. I'll see if I can dig up the link for ya.
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Click to collapse
I've wiped battery stats between flashes, but not recently, and not on a full charge. I will try this.
Let us know how it goes, so I can try it.
Well after doing that, my battery life yesterday was probably the longest it's ever been with this phone. Next time I go out, I'll throw it on the car charger again and see if it still drains while using it.
Yeah the proper way to calibrate it is by charging it fully first after a successful flash and then wiping the stats. I usually do a full charge with it on then turn it off and wait til it fully charges again (led turns blue) then boot into CWM and wipe its stats.
No luck, tried it out yesterday and got the same thing... battery drains while on the car charger (tried two chargers). Also get the jumps in % when rebooting, but only sometimes.
I ordered an extended battery for now, hopefully it will do the trick to get me through my move.
It's not an answer likely to make you happy, but the type of car charger you use and the car's electrical output are a factor here. I have personally seen a large difference in recharge time and ability depending on those factors. It may be worth your while to gamble on another $15-30 for a well-reviewed charger. It's definitely made a difference for me.
DroidApprentice said:
It's not an answer likely to make you happy, but the type of car charger you use and the car's electrical output are a factor here. I have personally seen a large difference in recharge time and ability depending on those factors. It may be worth your while to gamble on another $15-30 for a well-reviewed charger. It's definitely made a difference for me.
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Click to collapse
That's what I did. I had a cheap charger, and it didn't work well so I dropped $20 on a Griffin one, and it was no better. I never had a problem keeping my HD2 or Nexus S 4G.
Also, just for ****s, had the phone on a wall charger and made sure to keep the screen alive texting and playing WF... slowly but surely the battery drained while on the charger. So, not my car either. Seems like the screen being on absolutely murders my battery.
Sounds like a pretty scientific review, so that result sucks. However I would actually now throw some suspicion on your battery and/or phone itself. Reason I say so is that I am a heavy phone user at my office and also have screen awake and a lot of use for music and video playing and 4G audio streaming while on wall charger, and consistently get into the upper 90s or full charge while using it so much. See if Sprint will throw a new battery your way, and maybe that will help?
DroidApprentice said:
Sounds like a pretty scientific review, so that result sucks. However I would actually now throw some suspicion on your battery and/or phone itself. Reason I say so is that I am a heavy phone user at my office and also have screen awake and a lot of use for music and video playing and 4G audio streaming while on wall charger, and consistently get into the upper 90s or full charge while using it so much. See if Sprint will throw a new battery your way, and maybe that will help?
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We'll see how the extended battery I ordered does.
I didn't get the phone subsidized through Sprint, so it has no warranty. I doubt they would help me.
Download Spareparts and see if there are any processes hogging the system, especially in the partial wake lock list. It very well could be a faulty battery although I can't recall anyone ever having a battery issue on this board.
stir fry a lot said:
Download Spareparts and see if there are any processes hogging the system, especially in the partial wake lock list. It very well could be a faulty battery although I can't recall anyone ever having a battery issue on this board.
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Click to collapse
Nope, doesn't look like it.
BTW, I am running rooted stock EC05, no other mods except some frozen apps and Roam Control. I wouldn't wager that necessarily makes the difference, but you never know.
Try a different kernel?
You may want to start fresh and Odin back to stock and reroot.
stir fry a lot said:
Try a different kernel?
You may want to start fresh and Odin back to stock and reroot.
Click to expand...
Click to collapse
I experienced this on both the kernel that comes with SFR, and Genocide.
I may go back to a rooted stock... but I have been really happy with every other aspect of this rom.
You might want to Odin and start over. The only thing I can think of is maybe something is wonky with the modem or something.
stir fry a lot said:
You might want to Odin and start over. The only thing I can think of is maybe something is wonky with the modem or something.
Click to expand...
Click to collapse
I have one more thing to try first.
I've been using Launcher 7. There are lots of complaints about this being a battery hog. Going to give things a shot with ADW and see how I do.
Never heard of Launcher 7. I've seen ADW on the Market, but never tried it. I've used TouchWiz when I first got my phone, but lost it when I rooted with SFR. I am using LauncherPro right now, so try that one.
Also, I read that GPS is a major battery drain for smartphone. I never had a problem using GPS on my Exclaim, so maybe its the GPS drinking up a lot of the battery fluid?
Tbh, you should not worry if your vehicle has an adapter (either itself or cig lighter) and plug it in when the battery goes low.
ThunderOKC said:
Never heard of Launcher 7. I've seen ADW on the Market, but never tried it. I've used TouchWiz when I first got my phone, but lost it when I rooted with SFR. I am using LauncherPro right now, so try that one.
Also, I read that GPS is a major battery drain for smartphone. I never had a problem using GPS on my Exclaim, so maybe its the GPS drinking up a lot of the battery fluid?
Tbh, you should not worry if your vehicle has an adapter (either itself or cig lighter) and plug it in when the battery goes low.
Click to expand...
Click to collapse
Launcher 7 mimics WP7. I'm all for a clean, simple look, and as such, really like it. But its a CPU hog.
ADW is wonderful, and for most of my time with android its all i've used. I've got the paid version. Went ahead and installed it, and so far, so good. Setting it up with my phone on a charger, and my battery is finally going in the right direction while using the phone
I'll go for a drive somewhere tomorrow and see if it charges in the car while running ADW.

The Note 7 battery drain issue I've been having

All,
Last weekend, I experienced the most unusual occurrences where my Note 7 battery just drained within minutes while at least half full. I was browsing the internet on my phone waiting for a drink. I put the phone down to pick up the drink, and when I went back to the phone, I could not interact with it. I pressed on the power button for a few seconds, nothing. Went back to the car and plugged it up and there it went, it was out of power. I first thought it was weird, cause I could have sworn I had at least 40% batter left. Ok, whatever, that night it happened again. I'm pretty anal about battery power, so I will definitely notice when my battery reaches a low level especially so low that power shuts off.
Ever since the two incidents my phone has been running fine during the week. Just right now, I noticed my battery was at 39%, so I was like ok, let me plug it in and give it some juice before I leave work. I stepped away for a few seconds and come back to my phone and see it at 11%, I was like what?? I unlock my phone, and seeing it go down 10%, 9% while its being charged...I started "close all apps", still going down 8%, I go to settings, "optimize" and optimize all, nothing, 7%, finally drag down notification, close the Tidal app widget, and clear all, think what was left was Good app. 6%....keep watching the battery screen...7%...few seconds more 8%. PHewwww....
WTF was that?? Was it a rogue app that was sucking up the battery? But what triggered it? I checked GSAM battery tracker, Android System at 35% CPU usage 6h 9m, next is Kernel 11% 1h 56m, then Good 5.3% 55m..Instagram 4.9% 52min....
Its happened to me 3x within a week. GSAM is not telling me any info on what is causing this.
Any ideas?
If I were you , I would shut it down and return it .
tossero said:
If I were you , I would shut it down and return it .
Click to expand...
Click to collapse
me too
Sent from my SM-N930F using XDA-Developers mobile app
But from what I just did, to me it's gotta be a rogue app that's causing this or something is going on with the system. I also just wiped cached partition.
Sent from my SM-N930T using Tapatalk
Nutzzer said:
But from what I just did, to me it's gotta be a rogue app that's causing this or something is going on with the system. I also just wiped cached partition.
Sent from my SM-N930T using Tapatalk
Click to expand...
Click to collapse
Yes , maybe . Phone freezing and battery rapidly discharging in the actual context doesn't seem good. Be cautious...
Cheers~
Get rid of it ASAP!
When batteries discharge faster than expected they can generate heat, this heat can trigger the bad battery "explosion" we are all fearing.
This sounds like a prime situation. Shut the phone off and leave it off.
Get it replaced ASAP.
you should replace it
this is faulty battery
how long you had it so far
and how was batterg life , lagging , overheating like ?
FAULTY ALERT. do a scratch test and return it! lmao jk. just return it.
I have also had this happen where I check my battery percentage 75% then not a minute late my device is off and wont start up until I plug in a charger and then maybe 5 minutes later it show 30%. Something is really screwed up with the either these batteries or the phones themself. Worst decision ever was to not make the battery user replaceable! My Note 7 is going back once the replacements are available.
laserbiz said:
I have also had this happen where I check my battery percentage 75% then not a minute late my device is off and wont start up until I plug in a charger and then maybe 5 minutes later it show 30%. Something is really screwed up with the either these batteries or the phones themselves. Worst decision ever was to not make the battery user replaceable! My Note 7 is going back once the replacements are available.
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Click to collapse
Yup...I don't believe its the battery but something in the OS. I don't really care about removable batteries, but this battery fiasco, the lag, the battery drainage we experiencing...I think I'm done guys. I'm still on the fence, but leaning towards to the Iphone 7 Plus.
I honestly think it's something in the battery. The way they're exploding and the way it randomly drains points to battery issues. Plus if it was a software issue, Samsung would have pushed an update a long time ago. It's much easier to push an update than recall every single phone. I personally think the chemistry in the battery is off, that's why we get random drains and exploding batteries. Regardless, mine is getting exchanged as soon as the replacements are available. Btw, mine has been doing the same thing for the past week, so I know about having 50% or more of battery and it going completely dead. That's can't be because of the software. The phone would get hot if a rogue app was draining that fast. Not to mention I've never seen a rogue app drain a battery instantly...
Sent from my SM-N930T using Tapatalk
This could also be the electronics not accurately determining the batteries voltage. In turn, allowing the battery to charge well above what's safe (3.7v battery charged by a 5v charger)- and if there's one thing you don't do to lithium batteries it's overcharge them.
Phlip00ws6 said:
This could also be the electronics not accurately determining the batteries voltage. In turn, allowing the battery to charge well above what's safe (3.7v battery charged by a 5v charger)- and if there's one thing you don't do to lithium batteries it's overcharge them.
Click to expand...
Click to collapse
If the battery is not defective and it's the Power Management Circuit which is problematic, then the risk will even be more disturbing than the idea of having a defective battery. Anyone knows whether the Exynos variant is also using Qualcomm power management IC?
This is the extent of what Samsung is saying:
Based on our investigation, we learned that there was an issue with the battery cell. An overheating of the battery cell occurred when the anode-to-cathode came into contact which is a very rare manufacturing process error."
The leads shorting doesn't represent a problem with the cell - overheating/exploding would be normal in this situation.
Phlip00ws6 said:
This is the extent of what Samsung is saying:
Based on our investigation, we learned that there was an issue with the battery cell. An overheating of the battery cell occurred when the anode-to-cathode came into contact which is a very rare manufacturing process error."
The leads shorting doesn't represent a problem with the cell - overheating/exploding would be normal in this situation.
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Click to collapse
You have copy of the full report. I'm interested to read their findings.

Battery Failing?

Hi, I bought my wife a used 2014 edition some months ago and it seemed to work great but the battery didn't last very long. Recently I started playing a few games on it and realized that the problem was worse than I thought. It would say it was at say 60% but after 5 minutes playing a game it would go into power saving mode and be at around 14%. So I bought a new battery and it does the exact same thing! When I go into the battery setting it doesn't show anything using much power but something drains the battery as soon as you use it for almost anything.
Has anyone seen this before. If it doesn't tell me what app is draining the battery, how can I fix this? thanks
you are preaching to the choir. this is a big problem with these. the batteries are honestly easy enough to change but it is pretty much impossible to find an actual samsung replacement. they are all cheap knock offs that cant handle the voltages of the tablet which causes its own set of problems. I got one and it does help get more out of it but when you do anything too intense especially with less than 60% the thing will just shut off. total bummer. there are a lot of batteries out there just be careful of what you buy. and if you find a good replacement let us know!
I found a thread that seems to attribute this to faulty battery connection to the motherboard and someone who can weld can fix the problem. Has anyone else had success with this? thanks
nate39 said:
Hi, I bought my wife a used 2014 edition some months ago and it seemed to work great but the battery didn't last very long. Recently I started playing a few games on it and realized that the problem was worse than I thought. It would say it was at say 60% but after 5 minutes playing a game it would go into power saving mode and be at around 14%. So I bought a new battery and it does the exact same thing! When I go into the battery setting it doesn't show anything using much power but something drains the battery as soon as you use it for almost anything.
Has anyone seen this before. If it doesn't tell me what app is draining the battery, how can I fix this? thanks
Click to expand...
Click to collapse
As graffix31 said, this is a common issue. If you contact Samsung, they should be able to tell you where you can get a direct factory replacement battery (if they are even available still). Other than that, all you can really get is aftermarket ones that, like graffix31 said, can't handle heavy loads. I can vouch for that myself. Replacing my battery was definately an improvement over the old battery. I still have some issues though, but I've found ways to avoid them. If you are rooted, with any cpu management app, you can shut down 1 of the cores and reduce the maximum output of the others. This prevents mine from overloading the battery. It isn't ideal, but it works.

Redmi Note 8 Pro not charging at 100% after less than a month of use

Hi, I'm currently experiencing some problems with my Redmi Note 8 Pro.
I've had my phone for less than a month, and it's starting to get issues with the battery.
The battery, whether I charge it with the original wall charger, or I use a computer to charge it, or o use an alternative wall charger (that is for slow charge), it can't get to 100%.
It gets stuck at 99% and says, full charge in 2 minutes, even though the 2 minutes have passed long time ago.
I haven't done a full battery drain, and I always try to use a slow charge charger.
I also haven't done a full cycle without using the phone, maybe that's the problem.
But I'm worried, and I need some help, because I got the phone (as I said) less than a month ago, I haven't even payed the first installment.
I'm still within the seller's warranty, but I need some advices to what can I do, because returning the phone to the seller, to make a change, is gonna cost me 15 to 20 days. And I don't have any other phone to use.
Please, if someone can give me some advice, or tell me what to do, it's completely welcome.
Thanks.
And by the way, I'm using the Global 128Gb version, if that helps.
Edit 29/01/2020: I did a full discharge, because I couldn't read the quotes earlier, and I didn't realize how big the problem could be. Now, the phone can't go over 79%.
I didn't expected this issue with my RN8P, but with other phones (cheap noname ones).
A discharge to around 5%, and a full charge without unplugging did the trick for me.
AnonyIsRight said:
Hi, I'm currently experiencing some problems with my Redmi Note 8 Pro.
I've had my month for less than a month, and it's starting to get issues with the battery.
The battery, whether I charge it with the original wall charger, or I use a computer to charge it, or o use an alternative wall charger (that is for slow charge), it can't get to 100%.
It gets stuck at 99% and says, full charge in 2 minutes, even though the 2 minutes have passed long time ago.
I haven't done a full battery drain, and I always try to use a slow charge charger.
I also haven't done a full cycle without using the phone, maybe that's the problem.
But I'm worried, and I need some help, because I got the phone (as I said) less than a month ago, I haven't even payed the first installment.
I'm still within the seller's warranty, but I need some advices to what can I do, because returning the phone to the seller, to make a change, is gonna cost me 15 to 20 days. And I don't have any other phone to use.
Please, if someone can give me some advice, or tell me what to do, it's completely welcome.
Thanks.
And by the way, I'm using the Global 128Gb version, if that helps.
Click to expand...
Click to collapse
When I cannot tell if its some HW related problem with your phone or battery but I am really wondering why you want to do full charges (and/or discharges)? It is known to wear battery way faster. Li-on or Li-po batteries do not have memory effects and it is known to be best to always keep them charge for example between 15-20% and 80-85% trying to never get bellow or above.
This phone has a pretty big battery, that normally should be enough to bring you through a day of normal use (if it does not you may want to check your hungry apps running in the bg) but maybe you are an heavy gamer or use your phone for some heavy usage stuff?
Even then, it would be best to do 2 quick 15 to 50-60% in about 30 mins with QC2 (18W original Wall charger) rather than one unique full charge.
Looking at what you said with slow charging you probably know all of that already, but the faster you charge the battery, even if same %, the faster it will discharge. As odd as it is, remains factual.
I dont know if you ever used an external amperemeter or similar to check what kind of current was actually going through your battery while charging, but if you do you will notice the first % goes way faster to charge than the last few %. The chip dealing with the battery charge, charges slower and slower toward the end because it could damage the battery, when on the opposite it is rather safe to quick charge the % in the middle.
Also you may want to check your alternative 'slow wall charger' to make sure it provides you with a steady voltage current (V). If it is fluctuating too much, it may damage your battery.
If you want to do further research about the subject, there is a note on the RN8PRO Telegram group explaining how to calibrate your battery by deleting some system files (root needed as far as I remember) and having some charges/discharges steps. Personally I have not done it because it requires to go to 100% and 0% a few times, and depleting a Li-ion/Li-po battery completely can damage it irreversibly. They are not meant to be discharged fully period. Now battery should not be completely drained when OS takes the phone off, that said we never know for sure since we cannot change that setting unlike on our windows laptops, but I dont want to take the risk.
When you are stuck to 99% it kind of looks to be the OS not being able to know if the battery is fully charged or not. In that state of things, have you tried to turn off the device without unplugging to see if the off-mode charging screen (the small battery screen with % when you turn your phone off) also remains at 99% or gets to 100% at some point? Because maybe all you need is to restart the phone to make OS aware the battery is fully charged. Could be a SW known/unknown issue/bug to be fixed with future updates for all I know.
But again, I don't think you should fully charge and/or discharge (if you do) your phone when you can avoid it.
Just my 2 cents.
Hope this helps,
Regards,
-=Fxs=- said:
I didn't expected this issue with my RN8P, but with other phones (cheap noname ones).
A discharge to around 5%, and a full charge without unplugging did the trick for me.
Click to expand...
Click to collapse
I tried it, and... it got worse.
Now it can't go over 79%. :c
Thanks for trying to help anyways.
Muad.Dib said:
When I cannot tell if its some HW related problem with your phone or battery but I am really wondering why you want to do full charges (and/or discharges)? It is known to wear battery way faster. Li-on or Li-po batteries do not have memory effects and it is known to be best to always keep them charge for example between 15-20% and 80-85% trying to never get bellow or above.
This phone has a pretty big battery, that normally should be enough to bring you through a day of normal use (if it does not you may want to check your hungry apps running in the bg) but maybe you are an heavy gamer or use your phone for some heavy usage stuff?
Even then, it would be best to do 2 quick 15 to 50-60% in about 30 mins with QC2 (18W original Wall charger) rather than one unique full charge.
Looking at what you said with slow charging you probably know all of that already, but the faster you charge the battery, even if same %, the faster it will discharge. As odd as it is, remains factual.
I dont know if you ever used an external amperemeter or similar to check what kind of current was actually going through your battery while charging, but if you do you will notice the first % goes way faster to charge than the last few %. The chip dealing with the battery charge, charges slower and slower toward the end because it could damage the battery, when on the opposite it is rather safe to quick charge the % in the middle.
Also you may want to check your alternative 'slow wall charger' to make sure it provides you with a steady voltage current (V). If it is fluctuating too much, it may damage your battery.
If you want to do further research about the subject, there is a note on the RN8PRO Telegram group explaining how to calibrate your battery by deleting some system files (root needed as far as I remember) and having some charges/discharges steps. Personally I have not done it because it requires to go to 100% and 0% a few times, and depleting a Li-ion/Li-po battery completely can damage it irreversibly. They are not meant to be discharged fully period. Now battery should not be completely drained when OS takes the phone off, that said we never know for sure since we cannot change that setting unlike on our windows laptops, but I dont want to take the risk.
When you are stuck to 99% it kind of looks to be the OS not being able to know if the battery is fully charged or not. In that state of things, have you tried to turn off the device without unplugging to see if the off-mode charging screen (the small battery screen with % when you turn your phone off) also remains at 99% or gets to 100% at some point? Because maybe all you need is to restart the phone to make OS aware the battery is fully charged. Could be a SW known/unknown issue/bug to be fixed with future updates for all I know.
But again, I don't think you should fully charge and/or discharge (if you do) your phone when you can avoid it.
Just my 2 cents.
Hope this helps,
Regards,
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Hi Muad.Dib,
Well, I wanted to do that full charge a/o discharge because I thought it would help with the issue (turns out, it didn't, it got worse as you said) but I didn't know the effects of this before, I always thought it wouldn't have any effect. I wish I could have read your reply before doing it (I was busy and couldn't read it).
The battery lasts for more than a day (or it did before), and I always try to keep it clean from battery draining apps, and I don't play games that much on the phone, less than an hour per day.
Do you recommend me to do those 2 charges to 60% in my state? (phone can't get over 79% now).
I haven't ever used an amperemeter because I don't have one, and neither I do know how to use one of those.
If you can lend me a hand and give me the link to join the Telegram Group, it would very helpful ??. But I don't want to root the phone yet, cause the seller's warranty stills intact.
And yes, I have tried it and the off-mode charging screen keeps showing me 99% (or kept, because now it keeps at 79%). And I also tried few restarts and it didn't fixed it. :c
And I'm sorry, I wish I could've avoided it, but I read your reply too late.
Thanks for trying to help me anyways.
PS. I will try to do a factory reset to see if the MIUI update has something to do with the issue (because the seller told me to do it, and I will do it, though I don't think it could solve the issue). Please, if you have any advice before I do it, you could help me a lot. ( I'll do it something around 11:00 AM in GMT -03:00)
AnonyIsRight said:
Hi Muad.Dib,
Well, I wanted to do that full charge a/o discharge because I thought it would help with the issue (turns out, it didn't, it got worse as you said) but I didn't know the effects of this before, I always thought it wouldn't have any effect. I wish I could have read your reply before doing it (I was busy and couldn't read it).
The battery lasts for more than a day (or it did before), and I always try to keep it clean from battery draining apps, and I don't play games that much on the phone, less than an hour per day.
Do you recommend me to do those 2 charges to 60% in my state? (phone can't get over 79% now).
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Click to collapse
Hey.
Very strange what is happening to you it's probably the first time I read about something like this.
Please note I am no battery expert either.
From own experience and friends, usually when you wear a battery (or it worn by itself after use or bad storage condition before being sold) it still goes up to 100% but does not retain original design capacity anymore. The usual behavior is like for example you still have like 30% left, and suddenly it drops to like 5% and you only have a few seconds to plug it in the charger.
When that's happens it is time to change battery.
In your case I really have no idea what could prevent HW/SW to reach 100%.
AnonyIsRight said:
I haven't ever used an amperemeter because I don't have one, and neither I do know how to use one of those.
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Click to collapse
Oh those are easy to use as I meant some kind of small USB device that you plug in between your charger and your phone. They are cheap and you get them for like 10 bucks on Amazon. Readings might not be 100% accurate but they still give a decent idea as they display Voltage, Amperage and accumulated capacity/used current for device plugged.
AnonyIsRight said:
If you can lend me a hand and give me the link to join the Telegram Group, it would very helpful . But I don't want to root the phone yet, cause the seller's warranty stills intact.
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Click to collapse
As I said I am nothing like an expert or anything so I am unsure what I can do to help. However I did check the telegram group and I confirm you the battery calibration thing is a rooted thing.
To find that group it is pretty easy just search for Redmi Note 8 Pro OFFICIAL from telegram and join the group.
You find quite a few things there.
AnonyIsRight said:
And yes, I have tried it and the off-mode charging screen keeps showing me 99% (or kept, because now it keeps at 79%). And I also tried few restarts and it didn't fixed it. :c
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Click to collapse
Normally nothing you could have done, could have damaged the battery this way. Depleting it completely could have shorten its life or damage its overall capacity, but by all means there is no way in just a month you could have damaged the battery to this point. So either the OS is not reading things right (what version of OS and phone do you have - which region is your rom?) or either sensors or battery have a problem.
Since you still are under warranty period I would definitely get it replaced. Maybe you got a faulty batch or something. This happens.
AnonyIsRight said:
PS. I will try to do a factory reset to see if the MIUI update has something to do with the issue (because the seller told me to do it, and I will do it, though I don't think it could solve the issue). Please, if you have any advice before I do it, you could help me a lot. ( I'll do it something around 11:00 AM in GMT -03:00)
Click to expand...
Click to collapse
This definitely cannot hurt to try.
If that does not work return the phone.
Just to know, based on your flag I would assume you are in Chile but I may be wrong. If I am not mistaking it is summer there and probably is pretty hot. I wonder if 'too hot' could damage the battery.
Hope this helps.
Regards,

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