Develop Bugs

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?
Click to expand...
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
Click to expand...
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
Click to expand...
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

Battery calibration app

Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?

Do we really need this since it's a Li-ion battery? I know Ni-Mh and Ni-Cad has memory effect, but not on the Li-Ion battery.

I was just wondering the same thing today....simply because there seems to be several different methods to do it. Some say charge 8 hours, turn off, charge and hour, unplug, turn on charge 10 minutes. Then other methods say to do something different....be nice to have an app to walk you through different methods so you know step by step your doing it right

I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both

deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Click to expand...
Click to collapse
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.

All the battery calibration tools, are basically deleting the file... right?
Is it that hard to boot into recovery and wipe battery stats?

deonjahy said:
Could someone please develop a good app that would enable the battery to be drained as much as possible and to charge slower so we could all properly calibrate our batteries?
Click to expand...
Click to collapse
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
paulieb81 said:
That is to funny I was just saying to my wife the other day that I should make one of these programs seeing that there are none already. I hate having to manually kill my battery every night before I charge it again.
Is it needed? It depends on your school of thought, some say yes, some say no. All I know is that on the few devices I have had in the past, if I constantly plug them in to "top them off" then the battery never ends up lasting very long after a few months of doing that. So I am a believer in killing the battery before charging on devices like these.
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
Click to expand...
Click to collapse
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.

the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????

turn your brightness to 100% and change it so that it never turns off; use wifi tether and play a 720p movie at the same time; oc your kernel to it's highest stable frequency. it'll drain pretty quickly.

I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.

mykeldrip said:
the thing about my phone and battery that ALWAYS baffled me was i would plug it in at night be it at 10% or 22 i would leave plugged in while slept i would wake up unplug and look at battery percentage and it would be like 95.....no other phone has even unplugged and dropped 5 percent by doing nothing????
Click to expand...
Click to collapse
That's because the phone stops charging when it reaches 100%, and runs off of battery probably until it reaches in the low 90s, then charges again. You won't ever notice this because the light will always be green. However, you'll notice that unplugging it a few moments after it turns green, the battery will stay anywhere from 100%-98% for a while. At least on my phone it does.

Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)

laydros said:
I think the second part has to do with hardware. The phones hardware just doesn't have trickle charge implemented and instead lets it drop back down to 90% then starts charging it again.
As for the second part, it came on our phones, even has a default widget. 4G
Um... actually that is (by most accounts) bad for Li-Ion. You want to AVOID completely draining them. All of this stuff is more art than science, but I have way more often heard that completely draining LI batteries is bad. What kills them is the number of cycles they have been through (like -25 +25, -25 +25, -50 +50 would be a full cycle).
You do however want to give them a full up down cycle once in a while (maybe every 1-3 months) for calibration.
Then again, as I said, it is more art than science, and I have heard your method as being better, but the not draining argument seems to be the vast majority.
I'll try to do a little look-see and update this or repost if I find any stronger evidence.
Click to expand...
Click to collapse
I am by no means an expert so if you find any reliable info on this and can link us to read, I would love to learn more. All I know is that it is commonly said to drain rechargeable batteries and that I have seen that topping them off very often does lead to battery life degradation.

Tyzing said:
Is there any way to make this program "auto run" during sleep so it can do everything it needs to do during the night charge (similar to quickpull for blackberry)
Click to expand...
Click to collapse
There is no need to fully drain the battery. Its purpose in calibration is to configure the software that is correlating voltage to percentage charged. That's all. Regarding the old Apple advice, that is doing the same thing. It will not affect the hardware.
Now, what WILL affect the hardware is charging itself. Every charge/discharge cycle will reduce the total capacity of the battery. This is why the EVO will not cycle on it's own until 10% discharged. It's improving the overall battery life by that restriction.
In short, you will save money overall by getting a higher capacity battery that you don't force to charge too often. Draining your battery does nothing but give you peace of mind and it only really needs recalibrating when it's total capacity has been reduced which isn't often. 3-6 months.
Sent from my PC36100 using XDA App

herbthehammer said:
I know I might get flamed for this....
Apple suggests, with their laptops, to once a month or so, run the battery completely down. Then let the battery cool down for a little bit. Then give it a full, uninterrupted, overnight charge. I forget if they said to repeat this a second time, then you're good.
This is all from memory of me reading this a couple years ago or so, so our might not be verbatim. Their laptops use lithium ion technology...
(and they used to blow up and melt down too!) Lol!
Wrong word choice and misspelling courtesy of swype.
Click to expand...
Click to collapse
Yeah except that's not a good idea, it will kill the weak cells.

I understand. Still think it would be useful if it would do the "juice until LED changes" method while sleeping though

paulieb81 said:
So the bottom line is if there is a desire for this, I may try to put an app together for it, as I know myself I am interested I just didn't think many others would be.
Click to expand...
Click to collapse
I'm interested!

Btw - what are the charging calibrations people are using? Are you seeing one working better than another?

Im a noob, so take what I say worth a grain of salt but yesterday I did the standard method where you fully charge...turn off...plug back in until led changes green and do it a few times.
I went from 9 hours to 17 hours with no other changes except a few profiles in setCPU.
I did this just last night so my results are fresh.

Tyzing said:
I calibrated mine last night and I'm going to get about 18 hours if not more from it....before yesterday I was getting 9.
The ONLY other different I did was make some profiles on CPU but I cant imagine it would make that much of a difference. I bet its a mix of both
Click to expand...
Click to collapse
A few SetCPU profiles is all it takes to see a dramatic increase in battery life, especially while screen off. If you disable it I bet whatever gain you think was from 'calibrating' it disappears.

[Q] Instant battery drops

Im getting some weird battery stuff, as well as the Android OS drain. If I restart my phone, once in a while It drops like 20-30%. i'll go from 46% to like 18%. I see the threads about slow draining, but mine seems to happen instantly sometimes (3 different times so far in a week), anyone have solutions? Got it from someone on ebay, can I still/should I RMA?

Someone posted a kernel fix in the international GSII forum, so we're either waiting for that to get ported over here or wait for samsung to release a fix. I have that same bug too. What percent r u getting on the Android OS? Mine is usually in the 60's.

Yeah I saw that thread, and I saw the 2 things causing it. Waiting for that fix I guess, hopefully it solves the big battery drops as well as the small draining. Mines pretty high, 30-50% I believe, and then cell reception takes 10-20% with LOS

That's alot better than mine. Although, I don't have that LOS problem. I'm running stock atm. Are u on a custom rom?

Running Starburst 1.5, stock was better for no LOS. But I like the customization on Starburst. Hopefully by the end of this week the kernel we be ported over.

Most likely a problem with the battery level algo and not an actual battery charge drop. It's probably showing the correct value after the reboot.

Using battery spy I was using like 12%-15% per hour, not even doing anything. Saw online that formating the SD card might help, just did, and now im using .8% per hour. The hell, something was scanning the SD card or something. Much better now, hopefully itll last 10-20 hours instead of 6 hours.
edit: so it went back up again. At .8% it will last 2 days+, but since the events keep taking the CPU, its draining it. I got it down to 4-8% by taking the SD card out. At least it will last a little longer. Cant wait for the fix, this baby will last days after.

Damn that sucks. I just formatted my card too cuz I was running out of options. Keep us updated tho.

so I think media scanner is draining, I downloaded rescan media root from android market and before I was draining at 12% per hour, but when I disable it with the app, it goes down to 5-6%. Anyone else try? Maybe thats something thats draining.

Oh btw have u tried turning off wifi? It only drained 6% after being off the charger for 9 hours. I havent touched the phone during that time span tho. Android os still in the 50s btw.
Sent from my SPH-D710 using XDA App

These are my overnight stats when I was sleeping. It's usually worse when wifi is on.

manekineko said:
Most likely a problem with the battery level algo and not an actual battery charge drop. It's probably showing the correct value after the reboot.
Click to expand...
Click to collapse
this is almost definitely correct. battery doesn't drop 15-20% because of reboot...the reading is wrong. Battery drivers have been bad on a few of the latest android phones. Just look at when your phone stays at 99% for the first 3 hrs of use each day...what, does it just get really inefficient in the afternoon because of food coma from lunch?

toprock23 said:
Oh btw have u tried turning off wifi? It only drained 6% after being off the charger for 9 hours. I havent touched the phone during that time span tho. Android os still in the 50s btw.
Sent from my SPH-D710 using XDA App
Click to expand...
Click to collapse
Trying now, seems to be charging faster too. I was mainly on wifi because cell standby was really high, keep getting LOS. But maybe I wont with wifi off now, and i'll see how battery does. ill keep you updated.

Still bad. Can only wait for the patches/fixes. 8 hours doing nothing almost. Sigh.
edit: sent to the galaxy support on twitter, see how that goes.
http://twitter.com/#!/GalaxySsupport/status/124174089085652992

Hey man, I got one more tweak for u to try. I just rooted my phone w/ the latest zenomax kernel and Starburst 1.5. Download setcpu and create a profile for "screen off". Set it to 200-500mhz on demand. In theory, this should prevent 100% cpu utilization while the screen is off. I'm testing this myself atm, so I can't give u my battery stats yet.

toprock23 said:
Hey man, I got one more tweak for u to try. I just rooted my phone w/ the latest zenomax kernel and Starburst 1.5. Download setcpu and create a profile for "screen off". Set it to 200-500mhz on demand. In theory, this should prevent 100% cpu utilization while the screen is off. I'm testing this myself atm, so I can't give u my battery stats yet.
Click to expand...
Click to collapse
Think I have the v3 version and 1.5 as well. I have setcpu set to 200-400 powersave. ive tried others and same. Suspend and events/0 keeping eating at the CPU. Thanks for the suggestions though.

figured i'd chime in here. i've had days where the battery was fine and days where the battery was absolute trash. it's happened on stock, and it's happened on root. but it almost always seems to coincide with LOS. the first picture is one of several instances where i've had pretty fast drain followed up by an instant dump in charge under normal use. it's strange how after the drop, it slowly works back up then levels off and drains normally. the 2nd pic is from today. i left my phone at home on accident when i went off to work, and when i returned, i had LOS and this battery stat. you can tell where i lost signal . the last pic is from yesterday while i had the phone at work all day and light use; a nice consistent drain.

FU battery drops and FML
Ok so i read all the posts in this thread and i understand theres a issue that effects the phone from even knowing what the battery % is. i had to post these though. i was at 47% then rebooted my phone. phone boots up and yehhh! woop woop 8% now mind you if you look at the graph it shows a nice constant cerve downward but steady because i was using my phone the entire time. now after the restart/batery drop of 40% i kept using the phone constantly but its funny how it took me over a hour of screen on to go from 8% to 5% !!!!! i bet to get from 5% to 1% it will take 2 more hours for sure. you can see the graph start to flatten out like its a super battery after the 40% drop because it didnt really drop to 8% !!! normally i wouldnt care since my phone battery last just as long, it just goes down really slow from 8%-1% but at 5% it auto dims screen and wont let me use my camera for the next 2-3 hours while i knock off the remaining "4%" of battery left. fml

Get Starburst v1.6. He removed DRM processes which should lower Android OS usage and thus battery draining. Plus with the LoStKernel, I haven't had any issues with losing signal since.
Also, use Titanium backup to remove running services that you don't need. I got rid of the stock email client, digital clock, media/social hub if you don't use those. They don't take up a lot of ram, but every little bit helps.
My battery life has improved after battery calibration. I suggest you calibrate if you didn't already so your battery usage graph may be more accurate. Hope this helps.

Thanks for the tips! I was wondering how you would calibrate the battery. Is it the same as wiping battery stats from CWM?

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,
Click to expand...
Click to collapse
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).
Click to expand...
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.
Click to expand...
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.
Click to expand...
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,

Problem with new battery

Hello.
Two weeks ago I replaced my battery (2 years old) bacause the phone bagan to shut down on 35%, it was getting very hot, with very short life after recharge and so on.
They replaced it with genuine battery and now it's not so much better. Yes, now it goes to 1% and then it shuts down, but still the battery gets very hot and the battery life is not much better than the old one. I installed AccuBattery and it showed Estimated capacity: 2000mAh so I decided to try the guides in the forum for battery calibration... now the estimated capacity is 1400mAh
It's running on Oreo firmware and a custom rom Android 10.
What can I do? Is the battery defective?
Any help will be appriciated!
Thank you!

Darn I can relate to your situation, as mine says about 1837 MAH estimate in accubattery, I just bought this phone about 2 weeks ago from someone on craiglist, got it pretty cheap. I was also thinking of changing my battery but it looks like pretty difficult job. Like the most difficult there is just about.
Are you familiar with the HTC battery test? I'm curious what your old vs new batteries would have scored. My phone is on the charger right now and then when it gets to 100 I am going to run that test finally. I have been using accubattery and charged and discharged the battery a couple times since I bought it which helped (it was estimated as low as 44% capacity at one point ). Right now mine is 63% capacity.
Some lean towards it being a software issue. Also hard to say the source of the new battery and they do sit on the shelf 2 years probably at least since the phone is from 2016.
I am reading a thread and trying to find out what the best rom is for this phone and it might help the battery too. I am just having a problem with Windows 7 connecting (the driver install error, need to reinstall the drivers, M9 also has problem connecting to Windows PC so I can't unlock the bootloaders yet).
Update: I forgot to mention, mine hovers around 60-65% in accubattery, and says about 3.5 hours screen on time. BUt I have not been using this as my phone so I am gonna try that after the battery test and see what I am averaging. I am a light user, wanted a metal phone because they are stronger. A Motorola G7 Power would be a good phone if someone wants battery life and not too expensive on ebay.
This is the thread I am checking out: https://forum.xda-developers.com/htc-10/help/q-htc-10-power-hungry-htc-one-m8-t3791451

Hi.
I tried HTC test tool but it didn't show anything. Unfortunately, I hadn't run any tests with AccuBaterry with the old battery and I cannot compare. I'm beginning to think that it's the battery sitting on the shelf for years (I don't know how much time they can sit this way without worsening their properties) or the Android version. In fact when the phone was new, it had an excellent battry life and after I updated to Oreo firmware (official rom) the battry life got worse. I will try installing older rom, maybe even go back to stock to see if there is any difference.
While charging I see on lock screen Rapid Charge, then it goes to Charge, then Slow Charge... It's changing... I don't know if it's normal. Does it change this way for you?

Have you installed accubattery? You should, because it will tell you how your battery compares to the rated stock MAH capacity.
I ran the HTC Battery test, it drains the battery a bit for one hour, and if yours is 70% or higher after that, it is considered good. Mine was at 89% so that is not too bad.
Try again to run the HTC battery test, it's on page 2 of the tests. Also, I installed a program called generic battery drainer, because you want to cycle your battery to condition/calibrate it (especially with an older batter). When I ran that the first time my phone crashed at about 30-40 percent, and got hot. But then after that, the battery started acting more normal with each and every charge and recharge. That and using accubattery to tell me each time how much my battery was holding. According to accubattery my battery holds about 63% (about 1800mah). Accubattery says that it will give me about 4 hours of screen on time. It is not horrible nore is it that great.
With accubattery, you need to have the phone turned on while charging to gather the stats. I like it and I Think it really helps give me perspective on my battery.
I am thinking of getting a Moto G7 Power so that when we have an EMP attack I can still play videos games lol, just need to get an EMP proof storage of some kind to keep it in.
---------- Post added at 10:05 PM ---------- Previous post was at 09:41 PM ----------
Have you done the HTC battery reset? (3-button hold-down for 2 minutes)? DO that first, then charge to 100% and run the test.
To run the HTC Battery test, first charge your battery all the way to 100%, then type " * # * # 3 4 2 4 # * # *". On the 2nd page there's a battery test function.
---------- Post added at 11:03 PM ---------- Previous post was at 10:05 PM ----------
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papinho said:
Hi.
I tried HTC test tool but it didn't show anything. Unfortunately, I hadn't run any tests with AccuBaterry with the old battery and I cannot compare. I'm beginning to think that it's the battery sitting on the shelf for years (I don't know how much time they can sit this way without worsening their properties) or the Android version. In fact when the phone was new, it had an excellent battry life and after I updated to Oreo firmware (official rom) the battry life got worse. I will try installing older rom, maybe even go back to stock to see if there is any difference.
While charging I see on lock screen Rapid Charge, then it goes to Charge, then Slow Charge... It's changing... I don't know if it's normal. Does it change this way for you?
Click to expand...
Click to collapse
No I have not had that issue of it showing different charging rates with the same charger. It could be the cable has a short in it.

How long can you watch videos on youtube on Wifi for?
I ran my htc 10 and my HTC M9 head to head, both on youtube via wifi, watching the same at first but also some different and then later the same videos, until the phones drained and shut off.
Screen brightness for this test turned up to 100% btw.
HTC 10= 3 hours and 14 minutes
HTC M9= 3 hours and 38 minutes
Both phones are used i got the 10 on cl, the 9 on ebay. THe HTC 10 my orange led light does not function although the green led does work, I might try and run the led test. The 10 still has 63% capacity on accubattery. The estimated SOT is 4 hrs 4 minutes.
Has anything changed with yours for the estimated capacity? Have you charged and discharged a few times? Also try uninstalling and reinstalling accubattery then charge it some more, alswyas charge it 20 percent or more at a time it says for accurate estimates.
On a side note unrelated to battery I want to get my HTC Phones to work with windows 7 but the driver install never works so far.

Hi cannabiscure.
It's still the same, about 1750 mAh. I've tried the battery reset with the 3 keys before but actually the Accubattery showed less after that. I don't know, maybe it's not related and maybe I didn't made it right. I'll try again and test it but I need to install rom with Sense because it seems 3424 code is not working on pure Android. Reinstalling Accubattery does not change the readings. But I installed an app called Device HW Info and it shows 2700 mAh when the battery is on 100%. This seems far more logical for a new battery. It also shoes something called Kernel profile - 2744/3049 mAh. I don't know what does this mean.
I'm not watching many videos on youtube on the phone. Most of the time I'm browsing.

What is your screen on time (SOT)? How many hours does it say in the stock battery app and also in accubattery?
I got 3.25 hrs watching youtube on wifi with the screen on the highest brightness, so I could probably get at least 4 hours just web browsing and the screen on about 60-70 percent which is what I normally would use.
Are you using wifi or cell data for browsing, and how good is your connection?
Does rapid charging work on your replacement battery? I heard some don't.
papinho said:
Hi cannabiscure.
It's still the same, about 1750 mAh. I've tried the battery reset with the 3 keys before but actually the Accubattery showed less after that. I don't know, maybe it's not related and maybe I didn't made it right. I'll try again and test it but I need to install rom with Sense because it seems 3424 code is not working on pure Android. Reinstalling Accubattery does not change the readings. But I installed an app called Device HW Info and it shows 2700 mAh when the battery is on 100%. This seems far more logical for a new battery. It also shoes something called Kernel profile - 2744/3049 mAh. I don't know what does this mean.
I'm not watching many videos on youtube on the phone. Most of the time I'm browsing.
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Click to collapse