Related
NOTE: These tests were done using branded Orange PL firmware as well as UK Global
symptoms:
1. phone is charged by 100% then unplugged after about one hour
2. 100% is kept for the next 6-7 hours
3. during the day battery drops as normal till about 50%
4. once phone is rebooted battery instead of 50% shows 32%
I don't think the latest phones needs battery calibration (or am I wrong)
Sony has screw up the battery measurement
Hope they will soon release an update
Does anyone have similar issue?
masi0 said:
NOTE: These tests were done using branded Orange PL firmware as well as UK Global
symptoms:
1. phone is charged by 100% then unplugged after about one hour
2. 100% is kept for the next 6-7 hours
3. during the day battery drops as normal till about 50%
4. once phone is rebooted battery instead of 50% shows 32%
I don't think the latest phones needs battery calibration (or am I wrong)
Sony has screw up the battery measurement
Hope they will soon release an update
Does anyone have similar issue?
Click to expand...
Click to collapse
Only happened on second or third day that phone was on last 1% for half hour other then that it is accurate to me.
[edit:] no harm done in deleting /data/system/batterystats.bin after full charge, unplug, let phone go to 1% and then fully charge.
Sent from my Xperia T
tumult said:
Only happened on second or third day that phone was on last 1% for half hour other then that it is accurate to me.
Sent from my Xperia T
Click to expand...
Click to collapse
I think I need to wait till 1-2% then charge it up to 100% - then we shall see
masi0 said:
I think I need to wait till 1-2% then charge it up to 100% - then we shall see
Click to expand...
Click to collapse
yes, i just edited my post to suggest it
Sent from my Xperia T
Deleting battery stats will do nothing. Battery needs to be calibrated by charging full, unplug, turn off, plug back in till full, pop battery about 30 seconds, put battery back in then boot.
...
masi0 said:
NOTE: These tests were done using branded Orange PL firmware as well as UK Global
symptoms:
1. phone is charged by 100% then unplugged after about one hour
2. 100% is kept for the next 6-7 hours
3. during the day battery drops as normal till about 50%
4. once phone is rebooted battery instead of 50% shows 32%
I don't think the latest phones needs battery calibration (or am I wrong)
Sony has screw up the battery measurement
Hope they will soon release an update
Does anyone have similar issue?
Click to expand...
Click to collapse
Not sure if this is the definitive answer to this, but you should not believe your battery percentage meter, read this to know why
gregbradley said:
Not sure if this is the definitive answer to this, but you should not believe your battery percentage meter, read this to know why
Click to expand...
Click to collapse
This article is a b***t:laugh: How come these problems do not exist on the Xperia S or even iPhone 4s?
I hope Sony will release system update soon
@rbiter said:
Deleting battery stats will do nothing. Battery needs to be calibrated by charging full, unplug, turn off, plug back in till full, pop battery about 30 seconds, put battery back in then boot.
...
Click to expand...
Click to collapse
and didyou read my post? I said no harm in that, but he should do full charge.. and suggestion to pop out the battery fails a bit as T has unremovable battery
Guys. I had a very big problem here. My phone is just off the charger for about 10 min but the battery drops to 97% already. And I checked with the stamina mode which the battery only last for 18 hour and standby time only less then 2 days. Any idea about this? and any way to fix?
Thx.
Jol by J - Z1
How long have you owned the unit? I found mine needed a few charge cycles to become more stable.
One strange thing I have noticed is that whilst charging the notification light turns green at 90% for some reason, has anyone else noticed this?
Hi homer285. thanks for your reply. I had it for about a week only. So is it better I make some cycle charge for it to make it back to normal?
Thx.
Jol by J - Z1
homer285 said:
How long have you owned the unit? I found mine needed a few charge cycles to become more stable.
One strange thing I have noticed is that whilst charging the notification light turns green at 90% for some reason, has anyone else noticed this?
Click to expand...
Click to collapse
that is normal for all Sony devices.
90% to 100% is green. below 90 is orange. and below 10 or something is red.
btjoker said:
Guys. I had a very big problem here. My phone is just off the charger for about 10 min but the battery drops to 97% already.
Click to expand...
Click to collapse
for the first part, the battery dropping so quickly, can you provide another screenshot for the battery and the apps working, to see which app consumed more battery. I usually charge my phone before going to sleep and after waking up ~9 hours later the battery drops from 100-96%.
btjoker said:
And I checked with the stamina mode which the battery only last for 18 hour and standby time only less then 2 days. Any idea about this? and any way to fix?
Thx.
Jol by J - Z1
Click to expand...
Click to collapse
For the second part, this is normal. the estimated battery gives indication depending on your usage (so yours will be different than mine). while standby is where your phone is not being used and thats why it is longer although it is quite little, my phone at 62% and says 3 days and 2 hours in standby mode.
if I didn't answer your question, please explain further but other screenshots would help as well, thx
homer285 said:
How long have you owned the unit? I found mine needed a few charge cycles to become more stable.
One strange thing I have noticed is that whilst charging the notification light turns green at 90% for some reason, has anyone else noticed this?
Click to expand...
Click to collapse
I noticed this when charging mye phone the last time too. Maybe it is not quite calibrated yet? I did charge to 100% then totally drained it though, after charging it the first time out of the box.
Hi ahomad
Thx for ur reply. Attached is the photo of my battery usage for this morning.
I do understand what they mean but for the first few day usage my stamina standby time is up to 3-4days, just don't know what happen it dropped for used about a week.
And is it just the normal status or is it better to make some calibration for battery. If so, what is the best way to do that.
Thx.
Jol by J - Z1
btjoker said:
Hi ahomad
Thx for ur reply. Attached is the photo of my battery usage for this morning.
I do understand what they mean but for the first few day usage my stamina standby time is up to 3-4days, just don't know what happen it dropped for used about a week.
And is it just the normal status or is it better to make some calibration for battery. If so, what is the best way to do that.
Thx.
Jol by J - Z1
Click to expand...
Click to collapse
you might have been playing games heavily (assuming the second app using most power is a game) thus the estimation was lowered as the phone assumed you will play more games in the coming days.
But from the picture you attached, you do have quite good battery as you were playing heavy game for 40 mins while having LTE on yet the battery dropped 9% which is really good
just ignore what the phone is telling as long as you don't see real world weakness of the battery performance. these estimates are never real just to give an indication
Hi everybody, i'm a new french member and I have a question on my Galaxy S3 Mini device !
I have for 1 year now and i don't get any problem with it, my battery duration was 30H long !
Until 1 or 2 weak my battery duration is getting low... Now i have a 8H duration... and the last week i have 12H...
I don't install any strange application that consume too much and don't use useless options on android.
I try install an apps for battery, it change nothing. The apps that use the most my battery is the android system with 62% !!!!
Please help me. Do i have to change my battery ?
And sorry my bad english ^^'
Hatomike said:
Hi everybody, i'm a new french member and I have a question on my Galaxy S3 Mini device !
I have for 1 year now and i don't get any problem with it, my battery duration was 30H long !
Until 1 or 2 weak my battery duration is getting low... Now i have a 8H duration... and the last week i have 12H...
I don't install any strange application that consume too much and don't use useless options on android.
I try install an apps for battery, it change nothing. The apps that use the most my battery is the android system with 62% !!!!
Please help me. Do i have to change my battery ?
And sorry my bad english ^^'
Click to expand...
Click to collapse
I've been having the same issue.
i have this phone 1 year now and i had the same problem few days ago...im not a heavy user,so the phone usually lasted for 2 days of normal usage...but few days ago after i charged it, the phone lasted like 8-9 hours and Android OS was eating my battery 68%, keeping my phone awake all the time...
so i left the phone to completely dry up the battery until it shut down itself...then when i connected to the charger even more strange thing happened, the phone recognized that it is charging (as usual), but the screen was kinda blinking green lights all over the screen (there was no battery icon) and the phone started itself (i didnt even touch the power button)....after it started itself i shut it down and left it to charge up....after full charge i powered the phone and it is working normally for now....
so,i dont know if this gonna help you at all, but try leaving your phone to use all the battery until it shuts down itself and recharge it, after full charge power it up and see if it gets back to normal
cheers
funkyboj said:
i have this phone 1 year now and i had the same problem few days ago...im not a heavy user,so the phone usually lasted for 2 days of normal usage...but few days ago after i charged it, the phone lasted like 8-9 hours and Android OS was eating my battery 68%, keeping my phone awake all the time...
so i left the phone to completely dry up the battery until it shut down itself...then when i connected to the charger even more strange thing happened, the phone recognized that it is charging (as usual), but the screen was kinda blinking green lights all over the screen (there was no battery icon) and the phone started itself (i didnt even touch the power button)....after it started itself i shut it down and left it to charge up....after full charge i powered the phone and it is working normally for now....
so,i dont know if this gonna help you at all, but try leaving your phone to use all the battery until it shuts down itself and recharge it, after full charge power it up and see if it gets back to normal
cheers
Click to expand...
Click to collapse
Thank a lot ! I have the same issue. The first time i did it and reboot it my battery duration was... 1H... And when I redo it again it return to normal.. '-'
This very strange... But thanks
I have this exactly same problem. Please what should I do?? How do I know if I need battery replacement?
Hello everyone!
This is my second post here...but I really felt like I had to take attitude this time and actually do something.
So my samsung galaxy s3 is acting so weird that I can't use it without something bad happening for one day.
So...first of all...my battery doesn't last more than four hours straight if, for example, I am listening to music.
It literally goes down about 1% every few minutes.
Also..there is something really weird happening with my battery even after it completely shuts down. Lets's say I am on 1% and the phone shuts off. After the screen goes black and I plug it in...the charging screen appears and the battery seems to be half charged. I open the phone again and it is already at 45%. All this operation takes a matter of seconds...but still it goes from 1% to 45%. After the phone is up...this percentage starts to go down even faster than before...in the end my phone shuts down again...and this time it starts to charge from 0%.
Today it shut off...and when I got home and plugged in the charger it didn't do anything...i just left it like that for about 10 minutes then tried to power it on without the charger being plugged in...and it worked. After that it started to charge. I have no ideea what is happening.
Also...my charging time is really big. I do not know why but when I use another charger from a samsung galaxy mini 2 it seems to charge way faster.
That's pretty much all so far. If you need more details, please let me know.
I hope you can help me sort this out!
Best regards!
Ilie Mihai said:
Hello everyone!
This is my second post here...but I really felt like I had to take attitude this time and actually do something.
So my samsung galaxy s3 is acting so weird that I can't use it without something bad happening for one day.
So...first of all...my battery doesn't last more than four hours straight if, for example, I am listening to music.
It literally goes down about 1% every few minutes.
Also..there is something really weird happening with my battery even after it completely shuts down. Lets's say I am on 1% and the phone shuts off. After the screen goes black and I plug it in...the charging screen appears and the battery seems to be half charged. I open the phone again and it is already at 45%. All this operation takes a matter of seconds...but still it goes from 1% to 45%. After the phone is up...this percentage starts to go down even faster than before...in the end my phone shuts down again...and this time it starts to charge from 0%.
Today it shut off...and when I got home and plugged in the charger it didn't do anything...i just left it like that for about 10 minutes then tried to power it on without the charger being plugged in...and it worked. After that it started to charge. I have no ideea what is happening.
Also...my charging time is really big. I do not know why but when I use another charger from a samsung galaxy mini 2 it seems to charge way faster.
That's pretty much all so far. If you need more details, please let me know.
I hope you can help me sort this out!
Best regards!
Click to expand...
Click to collapse
1.Might be the battery is dead or broken, or its not calibrated. How old is the phone and battery?
2. It seems to take ages to charge my s3 lte too, give us a number in hours how much time you need?
3. The problem where phone wont turn on or show charging when battery is as low as 1%, i had this too, i think its normal, its protecting the battery
4. Do you have overcloacked anything? It happend to me when i had ovecloaced and did benchamark test, the phone froze and battery eas 5% when i restarted the phone, but before it was 45.
Not realy helpful but i am trying XD. Also might wanna buy new battery, its not that expesive
if you are running stock rom with no rooting no anything....100% it's the battery.
if not install stock and see how it goes...if it's acting normal then the mods are the problem...if it's the same it's the battery.
Do a factory data reset on stock recovery. See how that works out first
Starting from factory reset is bad idea - it should be the last step IMHO.
First what in such case we need to check is battery health.
Percentage we see on our phone is weak indicator, because it is calculated
Better to see the voltage in different situations. How to check this (terminal app or adb in console):
cat /sys/class/power_supply/battery/voltage_now
The lowest voltage that device can handle without heavy usage is less than 3500mV (I saw even 3240mV, but with low brightness, no data connection and after trying to make a call phone turned off).
The maximum voltage is obout 4300mV.
When You see 1% of battery and voltage is realy close to 3500mV or battery is charged and voltage after removing charge is dropping realy fast to then your battery very likely need to be replaced.
I bought Samsung Extended Battery (3000mAh) and this tripled the time usage than my 2 years old normal battery 2100mAh. You can see that difference in their capacity is much smaller - about 43% biger, but give me 300% much time on battery so old one was realy worn out.
BUT if your battery wasnt used for longer than half year, you can do as follows:
1. Discharge battery
2. When phone turns off - turn it on again, but into download mode (Home-VolumeDown-Power)
3. Leave phone for as long as it turns off again and repeat step 2 till time that Download Mode wont even boot.
4. Take off battery and place it back, and again try point 2 (start Download Mode) - do it until phone will show Download Mode for only 2-3 secconds
5. Again and last time replace battery and charge phone, but turned off
6. When phone will be charged, turn it on and leave it on charger for about one hour
After those steps use your phone lightly and try to repeat whole process one more time but only when the battery will normaly discharge and phone will turn off.
I tried those steps and battery for sure can work longer FOR ONE RUN, but unfortunately it can lead to loss of capacity much faster, but it will be noticable after one year - IMHO its always good time to buy new battery.
paffo said:
Starting from factory reset is bad idea - it should be the last step IMHO.
First what in such case we need to check is battery health.
Percentage we see on our phone is weak indicator, because it is calculated
Better to see the voltage in different situations. How to check this (terminal app or adb in console):
cat /sys/class/power_supply/battery/voltage_now
The lowest voltage that device can handle without heavy usage is less than 3500mV (I saw even 3240mV, but with low brightness, no data connection and after trying to make a call phone turned off).
The maximum voltage is obout 4300mV.
When You see 1% of battery and voltage is realy close to 3500mV or battery is charged and voltage after removing charge is dropping realy fast to then your battery very likely need to be replaced.
I bought Samsung Extended Battery (3000mAh) and this tripled the time usage than my 2 years old normal battery 2100mAh. You can see that difference in their capacity is much smaller - about 43% biger, but give me 300% much time on battery so old one was realy worn out.
BUT if your battery wasnt used for longer than half year, you can do as follows:
1. Discharge battery
2. When phone turns off - turn it on again, but into download mode (Home-VolumeDown-Power)
3. Leave phone for as long as it turns off again and repeat step 2 till time that Download Mode wont even boot.
4. Take off battery and place it back, and again try point 2 (start Download Mode) - do it until phone will show Download Mode for only 2-3 secconds
5. Again and last time replace battery and charge phone, but turned off
6. When phone will be charged, turn it on and leave it on charger for about one hour
After those steps use your phone lightly and try to repeat whole process one more time but only when the battery will normaly discharge and phone will turn off.
I tried those steps and battery for sure can work longer FOR ONE RUN, but unfortunately it can lead to loss of capacity much faster, but it will be noticable after one year - IMHO its always good time to buy new battery.
Click to expand...
Click to collapse
Nothing good will come from that procedure. Those steps were useful in the epoch of nickel-cadmium batteries, where the battery had no internal circuits to monitor itself and had a tendecy to uncalibrate. Those stops would force the device and the battery to re-adapt to one another.
But now we're using Li-Ion batteries, and those DO NOT like to be fully discharged. Hell, the device might not even recognize the battery, if it has really been fully discharged.
Source
Okay...so I went to the shop from where I bought my s3 (Orange shop) And they told me to send it to their service and I did so...as I still had it under warranty. It was there for exactly a week and today I got it back. They told me they replaced the battery (which they actually did...I checked that) and the power connector from my phone. The battery it's still not good enaugh in my opinion. Immediately after I got it back...I turned it on and it had 79% battery. In about an hour it went down about 25% (so to 54%) but I didn't used it havely (note: the mobile data option was on). I really do not know what to do. I asked someone and they told me to send it again because this is not normal.
My s3 is running stock 4.3 and used to last waay longer back in the day.
What should I do? I literally got about max 5 hours of use before I sent it and I am afraid this will happen again. I do not even want to think what is going to happen if I listen to music for example.
I turned the phone off a few hours ago...then let it charge up to 59% and then stopped because I had to leave. I used it moderately for about 4 hours and 51 minutes (as my phone says) and i have about 2h and 15minutes of screen on time. My screen is using 50% of the battery and also Android system is using about 17%...chrome 12% Android OS 7% and I think everything else is less important as they use 7%<. After those almost 5 hours...while the mobile data option was on all the time I am at 14% battery.
What do you think? Is it good enaugh? Should I send it back? I really need help!
I am waiting for suggestions.
Best regards!
Ilie Mihai said:
.....
I turned the phone off a few hours ago...then let it charge up to 59% and then stopped because I had to leave. I used it moderately for about 4 hours and 51 minutes (as my phone says) and i have about 2h and 15minutes of screen on time. My screen is using 50% of the battery and also Android system is using about 17%...chrome 12% Android OS 7% and I think everything else is less important as they use 7%<. After those almost 5 hours...while the mobile data option was on all the time I am at 14% battery.
What do you think? Is it good enaugh? Should I send it back? I really need help!
I am waiting for suggestions.
Best regards!
Click to expand...
Click to collapse
I think so, the fact that you have the screen on top of Android OS (and not the other way around) pleases me. You had your screen on for 2h15m, of course your battery went down fast
Test it, charge it full, and use it. Normally.
Do this for 2 or 3 days, and check how the battery lasts
Hi guys
My Redmi has experiencing a bit odd behaviour every time I charge his battery
I always do full charging cycles, from 0 to 100%, and than use it till it full drains.
I usually charge it with the phone off
The last couple of times a strange thing happened: I fully charge it from 0, with the phone off, but when I turn the phone on the battery level shows something in the 70% level, the last time it was 77% only., This time I connected it back to the charger, and it went to 100%
I already installed a battery calibrator, but this keeps happening now
I use the original Xiaomi charger, or a Sony charger.
My Redmi is running the stock Marshmallow ROM - that's another funny thing, my phone simply has no updates to Noughat or ahead, I'm in Portugal those updates should have already arrived
So, any suggestion from you?
Regards
Antonio
Most probably your device has fake MIUI vendor ROM. I am guessing this because there's no update you got on your phone.
Redmi 4X has been updated already to MIUI 10 based on nougat 7.1.2.
I would recommend you to backup your all data on phone and clean flash latest stable update and restore back everything.
metelhammer said:
Most probably your device has fake MIUI vendor ROM. I am guessing this because there's no update you got on your phone.
Redmi 4X has been updated already to MIUI 10 based on nougat 7.1.2.
I would recommend you to backup your all data on phone and clean flash latest stable update and restore back everything.
Click to expand...
Click to collapse
Thanks
I'm not very worried about using latest ROM's on my phone, the charging issue is the the thing that annoys me the most, I'll think about updating my phone if and when the other problem gets a solution.
Does anybody has a say on this matter?
You should try to keep your battery level above 50%. Lithium batteries need charge to keep their effectiveness.
Only do 0-100% maybe once a month. When you do, charge the phone when off to 100%. Boot phone, if it is below 100% at startup charge more until it reaches 100%, then restart. Continue this until you get stable 100% or consistently close to it.
Battery calibration apps are trash, don't even bother with it.
antonioduarte said:
Thanks
I'm not very worried about using latest ROM's on my phone, the charging issue is the the thing that annoys me the most, I'll think about updating my phone if and when the other problem gets a solution.
Does anybody has a say on this matter?
Click to expand...
Click to collapse
Okay here is my thought on your situation.
I charge my phone upto or around 90% to 95% and recharge it when it falls down to around 20% to 25%, due to my daily routine and usage i do get around 20% battery remaining almost everyday and in very rae case it goes below 10% till now for me it never went shutdown due to battery gone full zero.
I have Redmi 1S and i charge like this and i still do get around 2.5 hours of screen on time on it which is great considering it is 4 years old device. and i am still using same original battery came in the box which now shows some ageing signs since it has little bulge on it and sometimes phone shuts downs it self and after turning on it looses 10% to 15% of its charge.
it is recommended to keep some battery % left in phone for good battery health.
over time battery does loose its capacity.
you should consider changing how you charge your phone dont let it charge fully or let it drain fully. when battery drained out completely it does takes some time to hold some charge and when you charge you phone fully the battery does goes back to 99% and goes again to 100% since it is already on charge, this keep happening until stop charging which affects battery capacity and the charge it can hold.
i think in you case this issue happening due to the how you charge your phone.
metelhammer said:
Okay here is my thought on your situation.
I charge my phone upto or around 90% to 95% and recharge it when it falls down to around 20% to 25%, due to my daily routine and usage i do get around 20% battery remaining almost everyday and in very rae case it goes below 10% till now for me it never went shutdown due to battery gone full zero.
I have Redmi 1S and i charge like this and i still do get around 2.5 hours of screen on time on it which is great considering it is 4 years old device. and i am still using same original battery came in the box which now shows some ageing signs since it has little bulge on it and sometimes phone shuts downs it self and after turning on it looses 10% to 15% of its charge.
it is recommended to keep some battery % left in phone for good battery health.
over time battery does loose its capacity.
you should consider changing how you charge your phone dont let it charge fully or let it drain fully. when battery drained out completely it does takes some time to hold some charge and when you charge you phone fully the battery does goes back to 99% and goes again to 100% since it is already on charge, this keep happening until stop charging which affects battery capacity and the charge it can hold.
i think in you case this issue happening due to the how you charge your phone.
Click to expand...
Click to collapse
Thanks for your input
That doesn't make much sense to me since I charge it almost every time with the phone off, so once its 100% the charging process stops, and there's no way the battery should start draining because the phone is off - and even if it was on, it shouldn't loose 25% at once . If it was hardware problem, with the battery getting worn, I would never have the chance to drain it to zero slowly (it would shut down at 10% or so) or get an 100% charge level - and once I turn the phone on, he does go to 100% without any problem, so the battery seems to be ok
I do the same process with my 5 years old Sony Z1, once I charge it 100% I turn it off, and once I turn the phone on again, the battery charging level shows 100%, even If I do it a month after last charging. This old guy's battery is showing first signs of age, nowadays I get half the time I used to, but not that dramatic thing of not be able to do a phone call with 10% battery level.
So, same charger, same process, why my Xiaomi is behaving differently than he used to?
Why the charge level indicates 100% and once I turn the phone on, it shows 70 something %, and than charges without any hesitation to 100% ?
antonioduarte said:
Thanks for your input
That doesn't make much sense to me since I charge it almost every time with the phone off, so once its 100% the charging process stops, and there's no way the battery should start draining because the phone is off - and even if it was on, it shouldn't loose 25% at once . If it was hardware problem, with the battery getting worn, I would never have the chance to drain it to zero slowly (it would shut down at 10% or so) or get an 100% charge level - and once I turn the phone on, he does go to 100% without any problem, so the battery seems to be ok
I do the same process with my 5 years old Sony Z1, once I charge it 100% I turn it off, and once I turn the phone on again, the battery charging level shows 100%, even If I do it a month after last charging. This old guy's battery is showing first signs of age, nowadays I get half the time I used to, but not that dramatic thing of not be able to do a phone call with 10% battery level.
So, same charger, same process, why my Xiaomi is behaving differently than he used to?
Why the charge level indicates 100% and once I turn the phone on, it shows 70 something %, and than charges without any hesitation to 100% ?
Click to expand...
Click to collapse
The I am not sure why is that happening suddenly using same process.
I know you've said not interested in flashing ROM just yet but maybe consider changing ROM to official Global/china stable MIUI 8 or latest MIUI 10.
Possible reason for this hardware/battery or software issue.
Maybe get device checked at official xiaomi service center or contact them on customer care support. They should help you the best.
I'm trying to do the update route, but I'm not very confident on my tech skills - and the downloads are failing all the time.
What's the best/easiest way to update my 4x?
antonioduarte said:
I'm trying to do the update route, but I'm not very confident on my tech skills - and the downloads are failing all the time.
What's the best/easiest way to update my 4x?
Click to expand...
Click to collapse
This post should help...
https://forum.xda-developers.com/showpost.php?p=78915706&postcount=2156
Xiaomi Warrior said:
This post should help...
https://forum.xda-developers.com/showpost.php?p=78915706&postcount=2156
Click to expand...
Click to collapse
Hi
Thanks for your reply, I ended up finding there's a MIUI tool available on playstore with ready updates for most phones, so I just downloaded the updated ROM directly to my phone and installed it.
It even kept all my apps and files, I did some backups in the process but never had to use them
Thank you all guys
have you tried
1) power off the phone and then after few seconds power on
2) charge using a different charger + different cable when your battery level drops below 50%, just to check if the phone still charges to 76-77% or if it charges to 100%.
3) if the above fails you need try factory reset or flash latest MIUI rom