Hi, my sisters gave to me her old Galaxy S7 and I refurbished it: new cover, new display and new battery. Now I have a problem: when the phone reaches 40/30% of charge, it just shut down, no alert, nothing, the screen just goes black and if I try to restart it nothing happens, it's dead! When I attack the charger, it says the battery is at 0%!
I don't know what to think... the battery is new and this isn't the first time something like this happens: my previous phone (a Huawei P8 Lite) had the same exact problem; at 15% it just shutted down so I thought it could be the power outlet or the charger but I changed them both (now I even have an original Samsung charger!)... What could be the problem?
You didn't change the charging board when you were refurbishing the phone, right? You didn't change the whole motherboard as it seems.
Five things I can advise you to do:
Try battery calibration tips found everywhere.
Try simple factory reset.
Try installing the latest stock firmware, erasing everything in the procedure.
Head for custom ROMs.
Change some EFS components about the battery, it helped me somehow.
Did the previous owner had the same issue?
Thanks for reply btw no, I didn't change the motherboard since it worked just fine for my sister, the only problem was the previous battery that discharged pretty fast;
1. I calibrated the battery two times already, no fix :/
2. Did it already :/
3. Already did it
4. Guess I have to try
5. Is there a guide online to do it?
No, my sisters didn't have this problem, fast discharging battery aside, the phone didn't just shut down.
(sorry for my poor english)
Shir0ni said:
Thanks for reply btw no, I didn't change the motherboard since it worked just fine for my sister, the only problem was the previous battery that discharged pretty fast;
1. I calibrated the battery two times already, no fix :/
2. Did it already :/
3. Already did it
4. Guess I have to try
5. Is there a guide online to do it?
No, my sisters didn't have this problem, fast discharging battery aside, the phone didn't just shut down.
(sorry for my poor english)
Click to expand...
Click to collapse
On stock ROM, my device has a magnificent battery that I couldn't find in any other ROMs, although much of the ROMs has a great battery backup. So for you having such an issue, makes think maybe there is a problem about your new battery.
Try reverting back to the old battery, and check if it does the same loop.
EFS is probably the most important partition in your device, it is risky, and considered illegal to jiggle with in some countries, so, unless you are ready to take the heat, I advise you to not.
Phone reception plays a huge rule in the battery's backup duration, sometimes you can sleep with phone on 100% and wake up with ~60%. So maybe the carrier you are using has a really bad reception?
S7 tends to shutdown when phone's temperature is ~600°, and battery drains very very fast when phone is hot, maybe you have an issue with one of your motherboard components?
Related
my o2 xda is running tnt wm6 for a long time now with no problems but recently my battery has started draining super fast like right infront of my eyes it drops percent numbers. i run battery status but that has never bugged the battery before. i also tried switching batteries with two of my friends and their phones run fine but mine drains fast. i have charged it with both the computer and the charger. it charges super slow and upon charging when i restart it the battery drops something like 20 percent or more instantly. could this be a virus? i factory resetted my phone and formatted my memory card but im still getting this issue. please any help would be much appreciated!
d3aded said:
my o2 xda is running tnt wm6 for a long time now with no problems but recently my battery has started draining super fast like right infront of my eyes it drops percent numbers. i run battery status but that has never bugged the battery before. i also tried switching batteries with two of my friends and their phones run fine but mine drains fast. i have charged it with both the computer and the charger. it charges super slow and upon charging when i restart it the battery drops something like 20 percent or more instantly. could this be a virus? i factory resetted my phone and formatted my memory card but im still getting this issue. please any help would be much appreciated!
Click to expand...
Click to collapse
try other ROMs.
the fact of the matter is that ive been using this rom for so long without problems and this battery charger thingy just started a few days ago. could this be hardware problem?
Time for a new battery. Try nothing else until you have replaced it, with a new one, not one from another phone.
new battery really? u mean a battery from another phone doesnt do? and yes my battery dies very fast even my friends battery in my phone. cudnt this be a problem in my phone then? cause its his battery
Its definately a battery issue.
Check out this thread and I think you will relate: http://forum.xda-developers.com/showthread.php?t=353780
Then go to eBay and buy an new OEM replacement for like $10 shipped. I think I paid $8 for mine.
I personally think it is a bug.
On three separate occasions using various roms, my battery would drain from 100% to 0% in an hour. I would reset everything, recharge and it would run normal without problems.
I do not know what causes this but it does appear to be a software glitch, at least in my case.
try to hard reset your device and then test (after backup your data).
this can give you the clear reason (in case of the rom was running well with you).
good luck
try another radio!
i had the same issue, but it stop draining after i ordered the new battery
I suspect that it is not the battery or the unit.
its right said:
try to hard reset your device and then test (after backup your data).
this can give you the clear reason (in case of the rom was running well with you).
good luck
Click to expand...
Click to collapse
Actually I am suddenly having the same problem with a brand new battery on a brand new Wizard.
I just loaded the newest Mfrazz Rom which seems to be fantastic in its applications, speed etc. however immediately on loading the ROM, my battery does get hot in normal use and drains to 30% in a normal day. I have even loaded the IRDA disable cab to no particular effect.
Is there some specific procedure to which you are referring for hard resetting the Wizard? I assume you don't just take out the battery?
Dead battery
Lithium batteries can be killed rather easily. I know from rc helis. Most mobile phones use lithium-ion batteries. Helis use lithum-polymer batteries but they have pretty much the same charactoristics. li-poly is a little more volitile, they can and will explode if you charge or discharge too much or too quickly. If you over charge, you kill it. If you over drain, you kill it.
If you are in a place where you get little or no signal turn off the radio. It will discharge quickly if it's searching for a signal. Also if you are not using the bluetooth or wifi turn them off, same thing. That's why they provided the Comm Manager. Try not to let your charge get below 20%. Definately don't let it run completely out or stay that way long.
A dead lithium battery will not hold a charge at all. Just like you see, the numbers dropping off quickly. It will charge fast too.
(Snot the battery)
licensedtoquill said:
Actually I am suddenly having the same problem with a brand new battery on a brand new Wizard.
Is there some specific procedure to which you are referring for hard resetting the Wizard? I assume you don't just take out the battery?
Click to expand...
Click to collapse
Looking at it afresh, it isn't the battery which is heating up on installation of this ROM, it is the unit itself. The battery seems to be remaining at a comparatively normal temperature though the heat generation does drain it very quickly as I said.
Not sure that this problem has ever been addressed before on these boards? It may be something to do with not flashing to a manufacturer's ROM before flashing to Mfrazz's new one?
Has anyone ever seen these symptoms before?
In addition to some of the other posts ,you could check this :
WM6 may need to "learn" the battery levels again.
Try FULLY discharging & recharging your battery 3-4 times.
If this doesn't make things better, maybe you should check if you are running anything strange in the background...
jtrash said:
In addition to some of the other posts ,you could check this :
WM6 may need to "learn" the battery levels again.
Try FULLY discharging & recharging your battery 3-4 times.
If this doesn't make things better, maybe you should check if you are running anything strange in the background...
Click to expand...
Click to collapse
Lithium batteries don't recover like ni-cad. Spend the $10 and solve the problem. DONT EVER FULLY DISCHARGE A LITHIUM-ION BATTERY. That is the quickest way to kill it.
mr.incredible said:
Lithium batteries don't recover like ni-cad. Spend the $10 and solve the problem. DONT EVER FULLY DISCHARGE A LITHIUM-ION BATTERY. That is the quickest way to kill it.
Click to expand...
Click to collapse
As far as I am aware it is difficult to FULLY discharge one of those batteries in the Wizard? The unit starts giving error messages when it gets to the 15% level and some time thereafter shuts most of its functions down to prevent this. Whenever I have had problems with these units getting hot and even discharging and shutting down, the battery level never seems to be at 0% when I plug it in again. I have never thereafter found any permanent damage to the battery.
I think we should address the problem which seems to be in issue here which is that somehting in the OS is causing the battery to discharge as opposed to replacing the battery and watching the problem continue. At least, that was MY problem.
I am obviously not saying batteries don't die. All I am saying is that for a lot of users, the problem may lie elsewhere. Meanwhile I have flashed back to T-Mobile and re-flashed the newest Mfrazz which SEEMS to be quite VoIP friendly and overnight the unit doesnt seem to have heated up.
since i cant order a battery from where i live i tried reflashing my phone and memory card and i think that fixed it. maybe in my case its an os bug. and yes i definitely have been treating my battery badly on discharging and over charging. thanks for the info
They are not that delicate if you know what kills em it's pretty easy to avoid. They don't develop a memory like the older ni-cads. if you are going to store one charge it first. They don't power drain by them selves unless they are in a device. Just don't leave a battery drained. Also they wont over charge in the phone. The phone will stop charging when the battery is full, and 0% is not actually 0volts. There are built in safeguards for the average user.
1. The phone won't turn on
2. The charging indicator doesn't light up when I try to charge the battery.
3. One of the sensors on the top left turns dim red in color when I connect the charging cable
4. I can't hard reset either
thanks
Did the battery die all the way? Or did you flash a radio without checking the md5? If its a borked radio install say hello to a 500 dollar paper weight if its the battery your gonna have to charge it in another phone cause I'm not sure if cwm 5.0.2.7 has powered off charging
Sent from my myTouch_4G_Slide using Tapatalk 2
Yes we need a couple of info first. Also we need every information we can get in the last events before the phone got bricked. Like what did you do? what ROM? What's the status of the phone? Battery?
The more the details the better we could assist you.
Sounds like when my first Mytouch 3g broke, it would turn on the first couple of times going into a bootlope at the HBoot. It also didnt respond to charging or any other battery i tried.
Thanks for the reply strapped. I haven't flashed a radio. I did flash the virtuous infinity rom though. I'm not certain if that affected the radio. I did, however, let my battery die all the way. Do you know why one the sensors on the top left corner turns dim red when I connect the charging cable?
CJ_ said:
Thanks for the reply strapped. I haven't flashed a radio. I did flash the virtuous infinity rom though. I'm not certain if that affected the radio. I did, however, let my battery die all the way. Do you know why one the sensors on the top left corner turns dim red when I connect the charging cable?
Click to expand...
Click to collapse
Oh crap the battery die all the way problem
I think your battery is dead.s
Saw dozens of problems like this on the my previous device's forum.
Li Ion batteries have this fuse inside it in which it trips off when the battery gets discharged to a certain voltage. If it does your battery goes into a suicide mode in order to protect the phone.
basically the best thing to take good care of your battery is not let it drain lower than 40% and not fully charge it to 90%.
discharging it too low drains it's lifespan drastically. While charging it too high also drains it's lifespan.
Over-discharging Lithium-ion
Li-ion should never be discharged too low, and there are several safeguards to prevent this from happening. The equipment cuts off when the battery discharges to about 3.0V/cell, stopping the current flow. If the discharge continues to about 2.70V/cell or lower, the battery’s protection circuit puts the battery into a sleep mode. This renders the pack unserviceable and a recharge with most chargers is not possible. To prevent a battery from falling asleep, apply a partial charge before a long storage period.
Battery manufacturers ship batteries with a 40 percent charge. The low charge state reduces aging-related stress while allowing some self-discharge during storage. To minimize the current flow for the protection circuit before the battery is sold, advanced Li-ion packs feature a sleep mode that disables the protection circuit until activated by a brief charge or discharge. Once engaged, the battery remains operational and the on state can no longer be switched back to the standby mode.
Do not recharge lithium-ion if a cell has stayed at or below 1.5V for more than a week. Copper shunts may have formed inside the cells that can lead to a partial or total electrical short. If recharged, the cells might become unstable, causing excessive heat or showing other anomalies. Li-ion packs that have been under stress are more sensitive to mechanical abuse, such as vibration, dropping and exposure to heat.
Click to expand...
Click to collapse
maybe you guys should read this.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Cheers guys. Here's every bit of information I can recollect
A few days ago I created a nandroid backup and formatted my sd card via the PC.
I flashed the latest version of CWM recovery
I flashed the virtuous infinity rom 1.33 alpha v3 and then flashed the 1.35 beta 1 update.
Then i copied some music on to the SD card and installed a couple of apps.... nothing out of the ordinary.
The phone worked fine the last couple of days but I don't remember letting the battery die all the way. I should add that I have a dodgy battery; a couple of months ago my dear girlfriend spilled her drink and beer went in to back of my phone... since then the keyboard doesn't work (some keys work but its basically dead) and the battery has been affected as well since it now only lasts 3-4 hours after a full charge....but this issue can't have caused the problem I'm now having because the dead keyboard and dodgy battery have been around for a few months...
Last night, however, I think I let the battery die all the way and at some point, when I tried to turn it on, the phone vibrated as it does when you hold the power button, however, the screen didn't turn on. Since then, nothing has changed. When I connect the phone to the PC, it makes a couple of "connection" noises but I can't access the SD card or contents.
by saying latest CWM is it the 6.0 touch based CWM by chance?
sorry mate, i meant 5..0.2.7.
That's the CWM I'm using so it's safe. I'm also on latest VI for weeks without problem.
So it all points out to your battery.
Phone vibrating to power button means it's responding perfectly. Not sure about the light on the sensor only htc technician can tell.
But what I can say is if your trackpad button lights out red always then you got a brick on your hand.
Nope the trackpad isn't red so I guess that's a good sign. I've ordered a new battery and should have it later this week. Let's see if that fixes the issue. Will report back. Thanks all!
So, a new battery has arrived, however, it hasn't helped as the phone won't charge (no orange light) or turn on...... Since I live in Australia, I don't know anyone else with this phone. Is there any other way for me to revive my brick of a phone?? Thanks
CJ_ said:
So, a new battery has arrived, however, it hasn't helped as the phone won't charge (no orange light) or turn on...... Since I live in Australia, I don't know anyone else with this phone. Is there any other way for me to revive my brick of a phone?? Thanks
Click to expand...
Click to collapse
Get a universal charger for your battery.
Sent from Spaceball One.
This is a rough situation. Even with my DS I've had situations where nothing would happen when I tried to restart it, in particular when I let the system run all the way down. It is as if the battery needs to have some charge for it to charge more. I have three batteries though (the stock & two Anker 1900's) so when this happens I just swap out the battery with one that I charged in the external charger, and I haven't had any real issues with them long-term. Since you bought a battery, what battery was it, and do you think it was charged when you got it, and do you have an external charger to verify that the charge is solid when you put it back in the phone? Your phone may be completely dead however, but at this point, I don't think anybody on the thread really can tell. This make sense? I don't want to say, "buy a set of Anker 1900's with an external charger" but it was cheap enough vs. the cost of the phone, and the DS does seem to be a good one overall.
Hi All,
So I got an external charger for the battery and it arrived yesterday. I then proceeded to charge the battery and hours later, no luck. The phone still doesn't turn on. When I hit the power button, one of the sensors on the top left turns red slightly, shortly after which the phone vibrates. However, it doesn't turn on.
Where do I go from here?
Thanks
have you tried to disassemble your phone at all? you said liquid was spilled in it, could take time for corrosion to turn up. maybe a little electronic parts cleaner or rubbing alcohol may help out
Nope I haven't tried to disassemble it yet but is that the only option remaining? If yes, I might have to give it a go because this phone is now as useful to me as a brick, in its current state.
Hi, I decided to post this in a new thread because it's a different behavior from others I've seen in this forum. If the admin says I shouldn't, I can delete it and post it on other thread!
Posted videos of the issue:
https://youtu.be/3Fk4TffxwZM
https://youtu.be/35tlCmMBL8s
My nexus 5 had a custom ROM, unrooted, simple apps (facebook, twitter, etc) and original screen and battery.
After crashing the screen, I bought a new one plus a new battery. Immediately after connecting the new screen plug and the new battery plug, the flat cable started to overheat, and the screen never turned on - ok, something is bogus. I tried again with the old battery and had the same problem. So, the screen must be no good, I just reinstalled the other broken one that still works.
However, since then, the cellphone always is turned on with 100% battery even knowing that it is not fully charged. And, a little while after, it starts to drain, 1% per second, even when I'm charging it, untill it turns off, or - sometimes - get back to 100%.
While on bootloader, it never turn itself off, thou. But if I turn it on, sometimes this happens, sometimes the cell only works untill the lockscreen and immediately turns itself off - even while charging or hours after charging. (pls check the youtube videos)
What i have tried:
Change the charger and cable
Use original charger
Switch back to the old battery (same problem)
Reinstall ROM
Reinstall Original ROM from google
Wipe batterystats.bin (I know, I know, just in case)
Install battery calibration apps
Root and install battery calibration apps
Charge to 100%, let it drain to 20% and recharge (thou it constantly drops)
Charge all night
Wait to drain a lot and charge again
Wait to drain a bit and charge again...
And nothing worked.
I saw no similar issue on this forum, even on the "battery drain while charging" posts, they're not exactly the same issue.
So... is it possible that crappy screen broke my both batteries? Anyone know what else could I try?
dvdfranco said:
Hi, I decided to post this in a new thread because it's a different behavior from others I've seen in this forum. If the admin says I shouldn't, I can delete it and post it on other thread!
Posted videos of the issue:
My nexus 5 had a custom ROM, unrooted, simple apps (facebook, twitter, etc) and original screen and battery.
After crashing the screen, I bought a new one plus a new battery. Immediately after connecting the new screen plug and the new battery plug, the flat cable started to overheat, and the screen never turned on - ok, something is bogus. I tried again with the old battery and had the same problem. So, the screen must be no good, I just reinstalled the other broken one that still works.
However, since then, the cellphone always is turned on with 100% battery even knowing that it is not fully charged. And, a little while after, it starts to drain, 1% per second, even when I'm charging it, untill it turns off, or - sometimes - get back to 100%.
While on bootloader, it never turn itself off, thou. But if I turn it on, sometimes this happens, sometimes the cell only works untill the lockscreen and immediately turns itself off - even while charging or hours after charging. (pls check the youtube videos)
What i have tried:
Change the charger and cable
Use original charger
Switch back to the old battery (same problem)
Reinstall ROM
Reinstall Original ROM from google
Wipe batterystats.bin (I know, I know, just in case)
Install battery calibration apps
Root and install battery calibration apps
Charge to 100%, let it drain to 20% and recharge (thou it constantly drops)
Charge all night
Wait to drain a lot and charge again
Wait to drain a bit and charge again...
And nothing worked.
I saw no similar issue on this forum, even on the "battery drain while charging" posts, they're not exactly the same issue.
So... is it possible that crappy screen broke my both batteries? Anyone know what else could I try?
Click to expand...
Click to collapse
Hey, did u ever figure out the reason ? I'm having a similar issue.. maybe we can work together n figure smthn out
sorry bro, I just gave up. It was too much to pay for another screen or new parts; I never discovered what the real problem was =(
dvdfranco said:
sorry bro, I just gave up. It was too much to pay for another screen or new parts; I never discovered what the real problem was =(
Click to expand...
Click to collapse
Figured out the problem and fixed it. Posting it here in case someone has this issue, so after trying everything from getting a new battery to installing different roms, installing various apps rooted and not to see what's draining my battery. Funny how the phone was never going into deep sleep. Anyway long story short the problem was hardware, I changed the flex cable, the whole strip, some may call it the charging strip. Now it's fixed charges to 100% in 2 hours and battery lasts all day.
Hi all, I am experiencing some problems with the battery of my phone after doing a factory reset due to general slowdown. Here are the specs of the device:
E6653 - Android 7.1.1 - Build no. 32.4.A.1.54 (branded by Wind which is an Italian telephone company)
The problem is, after the reset the phone started to shutdown due to "low" battery at 70%. My first thought was "OK, the battery is gone" because I have the phone since 2015. But after the restart, the level is still 70% instead of 0%.
Moreover, when it shuts down, I can't reboot unless the phone is on charge. When it restarts, as I said before, the charge is the same level as before the reboot, and if I leave the phone untouched it lasts for the whole day as before. But if I use it for more than some minute, it reboots again signaling low battery, but the charge is the same as before. The phone can't reboot by itself, it needs to be plugged. After it has restarted, I can remove the cable and the phone keeps working as usual.
Here is what I tried to do until now:
- Calibrate the phone (phone is not rooted): the phone keeps working until the battery goes to 60%, then shuts down and is unable to reboot if not plugged to the charger. the same happens if I try to reboot it manually.
- Remove power saving options (stamina, data saving etc.) the phone keeps working until 40% of power, then shuts down as before, but if I try to reboot it manually it is able to reboot normally.
Here is what I am thinking to do:
- Root the phone to perform a root calibration: in this case I would like to know if there is a way to root the stock ROM only, without custom kernels, custom ROM etc. because the stock ROM has always worked flawlessly and I don't want to change it;
- Think about a battery replacement. One thing I noticed is that before the reboot, the battery seems to heat a bit, but not more than usual. I don't know if it can be linked to the problem I described.
Do you have any suggestions? Thanks in advance
I think it's purely a matter of battery because I never experienced it in the xperia Z3,about the problems of the root and of the calibration battery that no results really mean,I'd say replace the battery and if the problem still occurs there is the possibility of more severe that the IC power or IC charger or something I don't quite understand because I'm not a technician
I have same issue. Even battery level show more than 80%, but suddenly the Z5 shutdown. It is really annoying. I did factory reset but not help. Check battery status show healthy as well. I am not sure battery issue or some hardware issue such a corrupt NAND.
Also phone got hot even just take a picture.
Totally I am tired with this phone. I used use many kinds of Android since 1.6. But this Z5 stock is unstabler than own customized kernel phone.
I regret bought this phone.
I found this old thread still open so the conclusion is: I had the phone tested by ad authorized assistance centre and the battery was gone, so I had it replaced and re-calibrated the phone as soon as the new battery was in. It has been working for two years and the capacity is still at about 95% so the thread can be marked as solved
Hello guys,i bought poco f2 pro global a week ago.My problem is the follow:
When i put my phone for charging the process go to 89% and freeze there.if i disconnect and connect again the charger then its make it 100%!?u can wait 5 h but no more than 89%.
Its very anoyning ,coz when i got to bed i put the phone on charge and at the morning i get it on 89%.
Factory reset didn't solve it.Any ideas?thx
Try draining the battery to 0%, then let it charge uninterrupted and see if that helps..
Hi if you've seen some of my posts. I got a Poco F2 Pro and on the second day it started showing 1% battery charge all the time. As well as an overheating issue and would close the camera after 5 seconds. Not sure what I did other than turned it off and let it charge a few times. For no known reason it started working fine. That was a week ago, so haven't had the problem occur since.
I'd check while the phone is off what the battery level shows as. If it still shows 89% it might be more serious, otherwise could be a bug
Fast78i said:
Hello guys,i bought poco f2 pro global a week ago.My problem is the follow:
When i put my phone for charging the process go to 89% and freeze there.if i disconnect and connect again the charger then its make it 100%!?u can wait 5 h but no more than 89%.
Its very anoyning ,coz when i got to bed i put the phone on charge and at the morning i get it on 89%.
Factory reset didn't solve it.Any ideas?thx
Click to expand...
Click to collapse
ITs not uncommon a miss-calibrated battery. Make a full discharge, wait all the time until your phone is power off. Once completely drained, try (without charger) power on some times, to be completely sure is totally death. Now, make a complete Full cicle. This time, the phone should reach 100%
Thank you all for the suggestions. I discharged the battery to 0 %,then plug it again and the result was 92%.So no luck..I really hope that this is software bug and will be fixed with miui 12 .Will be very unlucky if my unit is defective.the phone is a week old .what do you think,if i download the present software and flash it , maybe that's will help?
Theliels said:
ITs not uncommon a miss-calibrated battery. Make a full discharge, wait all the time until your phone is power off. Once completely drained, try (without charger) power on some times, to be completely sure is totally death. Now, make a complete Full cicle. This time, the phone should reach 100%
Click to expand...
Click to collapse
This so called "calibration of the battery" is total BS.
At every boot with at least the latest 4 Android versions it will "calibrate" itself and nothing one can do about it to "trigger calibration" or that kind of stuff.
When the battery won't charge beyond 89% something else is causing it, faulty battery or software related.
Did you unlock your device or is it still locked?
When locked try to manually download the whole rom new from the update menu and reflash it.
Then check if it charges correct of not.
Snah001 said:
This so called "calibration of the battery" is total BS.
At every boot with at least the latest 4 Android versions it will "calibrate" itself and nothing one can do about it to "trigger calibration" or that kind of stuff.
When the battery won't charge beyond 89% something else is causing it, faulty battery or software related.
Did you unlock your device or is it still locked?
When locked try to manually download the whole rom new from the update menu and reflash it.
Then check if it charges correct of not.
Click to expand...
Click to collapse
Some devices that I have seen with the same behavior would not think the same as you, obviously with a healthy battery. A bad battery can behave abnormally too, but I doubt that is the case.
And yes, it can be called a ... "calibration", although nothing to do with the supposed magic cures of deleting the battery statistics file. What happens is not that % battery is lost or that the battery is not fully charged. In fact, if the battery is fully charged, it is the count that fails. This is perfectly evident, when the phone reaches 1% it stays in that% much longer than usual, because the phone really did not have 78% (for example) and is not full drained yet. Once the battery is completely drained, the margins are recalculated correctly again. It is not a bad battery that is not fully charged, it is fully charged, what happens is that the battery reports incorrect data due to a "calibration" mismatch.
In any case, the partner will be able to tell us perfectly if it worked, or not . I repeat, there are many phones that I have seen with this behavior and many that have returned to their being. It is clear that if the battery is bad it will continue to be bad. It has happened to me in the past with a pair of Xiaomi phones, the last one a Redmi 6, is not uncommon
Snah001 said:
This so called "calibration of the battery" is total BS.
At every boot with at least the latest 4 Android versions it will "calibrate" itself and nothing one can do about it to "trigger calibration" or that kind of stuff.
When the battery won't charge beyond 89% something else is causing it, faulty battery or software related.
Did you unlock your device or is it still locked?
When locked try to manually download the whole rom new from the update menu and reflash it.
Then check if it charges correct of not.
Click to expand...
Click to collapse
Hi
Sorry , i don't have anything intelligent to say about battery calibration (except that if the battery sound faulty, take advantage of the phone warranty while you can!)
So... I just saw @Snah001 had a F2 pro and a Mi 9T pro... Could you please give us your quick opinion and advice here ? https://forum.xda-developers.com/poco-f2-pro/help/poco-f2-pro-t4137287
Thanks so much
Cheers !