Database Users

Battery charge values

Hi all!
I've some strange problems with mt nexus 4 battery values.
Today i had 59% of battery and i plug it to the original charger. After 2 hours i saw the battery with 100% charge value. OK. Nothing wrong here. I rebooted the phone and after that i had 84% of battery.
This is happening almost every time i charge my nexus 4.
I had stock rom with franco.kernel updater. Now i have paranoid Android with The same kernel.
Any idea about this?
Sent from my Nexus 4 using xda app-developers app

anyone?

Have you been dirty flashing a lot?

your battery reading needs to be recalibrated.... Charge full than use until it shuts down...than charge again fully, at 100% reboot phone & connect to charge again.....
You also can try "BatteryRepair.apk" from market..most of the time it helps to recalibrate..just install, open & follow on screen instruction....

steci86 said:
Have you been dirty flashing a lot?
Click to expand...
Click to collapse
Not really. Just rooted the phone 3 weeks ago and i was with stock + franco.kernel updater till 1 week ago. Then changed to Paranoid Android + Franco.kernel.Updater.
abir099 said:
your battery reading needs to be recalibrated.... Charge full than use until it shuts down...than charge again fully, at 100% reboot phone & connect to charge again.....
Click to expand...
Click to collapse
I'm trying this right now. At 1h07am the battery had 0%, so i connected to the original charger and did go to sleep. When i woke up, it had 100%. I rebooted the phone, connected the charger again and the phone had 90% (This at 8am). 2 hours later the phone is at 97%.
abir099 said:
You also can try "BatteryRepair.apk" from market..most of the time it helps to recalibrate..just install, open & follow on screen instruction....
Click to expand...
Click to collapse
I couldnt find this on market :/

Atomsk said:
Not really. Just rooted the phone 3 weeks ago and i was with stock + franco.kernel updater till 1 week ago. Then changed to Paranoid Android + Franco.kernel.Updater.
I'm trying this right now. At 1h07am the battery had 0%, so i connected to the original charger and did go to sleep. When i woke up, it had 100%. I rebooted the phone, connected the charger again and the phone had 90% (This at 8am). 2 hours later the phone is at 97%.
I couldnt find this on market :/
Click to expand...
Click to collapse
I had the same issue with my previous nexus 4. Did you ever get your screen/display changed? Or do you charge your phone overnight? Do you rely on USB charging a lot? If any of those answers is YES, its probable that your battery has gone bad (as mine had)

I don't think that's the solution, but give a try to this free app from the play store: https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=it
I always thought this problem was related to rom development but I'm not sure. It happened to me with CM11 at the very beginning in november, and then it just stopped. Since January I'm on slimkat, at first it didn't happen and then for a few weeks i noticed the same problem you have, now everything has been fine again for the last two weeks.

japmeet said:
I had the same issue with my previous nexus 4. Did you ever get your screen/display changed? Or do you charge your phone overnight? Do you rely on USB charging a lot? If any of those answers is YES, its probable that your battery has gone bad (as mine had)
Click to expand...
Click to collapse
I had changed my display and i charge over night.
I've tried the calibration 2 days in a row (battery at 0%, then charge till 100%, reboot, charge till 100% again). Yesterday i had 90% after the reboot. Today i got 91% after the reboot.
steci86 said:
I don't think that's the solution, but give a try to this free app from the play store: https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=it
I always thought this problem was related to rom development but I'm not sure. It happened to me with CM11 at the very beginning in november, and then it just stopped. Since January I'm on slimkat, at first it didn't happen and then for a few weeks i noticed the same problem you have, now everything has been fine again for the last two weeks.
Click to expand...
Click to collapse
I'm gonna try that app. I rebooted the phone around 9am and now is almost finishing the charge. The battery lasts till tomorrow with my normal use of the phone, but i tough strange that every time i rebooted the phone, i lose battery % :s

Just try avoiding the charge to 100%->reboot->charge to 100% again for a few days.
Don't let it discharge till 0%, connect the charge when you have 1%-4% left and let it charge till 100% with the phone on, and then use your phone normally.

Atomsk said:
I had changed my display and i charge over night.
I've tried the calibration 2 days in a row (battery at 0%, then charge till 100%, reboot, charge till 100% again). Yesterday i had 90% after the reboot. Today i got 91% after the reboot.
I'm gonna try that app. I rebooted the phone around 9am and now is almost finishing the charge. The battery lasts till tomorrow with my normal use of the phone, but i tough strange that every time i rebooted the phone, i lose battery % :s
Click to expand...
Click to collapse
Please go through this thread. A couple of other members (myself included) finally deduced that if you ever have your display changed you NEED to get your battery changed as well. Trust me on this, get your battery checked once. It WILL be bloated. Also, if upon restarting there is a break in the battery graph and there is a significant drop/rise in battery level, that is another indicator that your battery is going.

japmeet said:
Please go through this thread. A couple of other members (myself included) finally deduced that if you ever have your display changed you NEED to get your battery changed as well. Trust me on this, get your battery checked once. It WILL be bloated. Also, if upon restarting there is a break in the battery graph and there is a significant drop/rise in battery level, that is another indicator that your battery is going.
Click to expand...
Click to collapse
I've been reading that thread but for example, what happens to me it's nothing compared to the first topic of that thread. I only miss sometimes 10% after restart, sometimes 5%, sometimes nothing. From what i understand, in that thread most of users with battery problem had like 80% and after reboot they only had 2%, or 0%. Thats different i think, but i'm not expert on this subject
Anyway, installed the suggested app and calibrated the battery throw the app. For now i have this data (Paranoid Android Beta6+Franco.Kernel.Updater r201):
http://imgur.com/jnPpA3d

Just restarted my phone a while ago
http://imgur.com/ZpmXtS0
Sent from my Nexus 4 using xda app-developers app

Atomsk said:
Just restarted my phone a while ago
http://imgur.com/ZpmXtS0
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Try Battery Monitor Widget from the Market - you can see what current the phone is pulling, and if indeed full charge is reached. There are also calibration tools inside - the app calculates the real capacity of the battery, for example. If it's a long way from 2100mAh it would be a sign you need a new battery.
Though like everyone else, I think it´s a software problem. With previous Android phones I had to be careful calibrating, flashing etc. With the N4 I've had no such issues in the year I've had it. That app can help you sort out battery calibration though.

Can you tell me The dev name? Got 2 battery monitor widgets :s
Sent from my Nexus 4 using xda app-developers app

Tried this one and got this results
http://imgur.com/nb71cbI
Sent from my Nexus 4 using xda app-developers app

Atomsk said:
Not really. Just rooted the phone 3 weeks ago and i was with stock + franco.kernel updater till 1 week ago. Then changed to Paranoid Android + Franco.kernel.Updater.
I'm trying this right now. At 1h07am the battery had 0%, so i connected to the original charger and did go to sleep. When i woke up, it had 100%. I rebooted the phone, connected the charger again and the phone had 90% (This at 8am). 2 hours later the phone is at 97%.
I couldnt find this on market :/
Click to expand...
Click to collapse
Here is the link of Battery Repair....try this, it really works
https://play.google.com/store/apps/details?id=air.ynfo.batteryrepair

abir099 said:
Here is the link of Battery Repair....try this, it really works
https://play.google.com/store/apps/details?id=air.ynfo.batteryrepair
Click to expand...
Click to collapse
Thanks for the suggestion, but that's a little expensive for me at the moment

Atomsk said:
Just restarted my phone a while ago
http://imgur.com/ZpmXtS0
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Well this is perfectly normal..

Atomsk said:
Tried this one and got this results
http://imgur.com/nb71cbI
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
This looks normal, although if you see a break in the battery graph and huge drop/rise in battery then its definitely done for. However its not the case with your phone, so relax

Well this evening i left the phone with 60% of battery and at 7am the battery was death. Just ordered a new one. I've only one problem. I dont have any plastic screw to open it. I've the torx t5 screw only.
Any advise to the new battery?
Sent from my Nexus 4 using xda app-developers app

Battery drain?

So I have verizon version.
I went to bed with 80% on my HTC 10
And 60% on my S7e also verizon version.
I woke up with 63% on HTC 10 and 59% on S7e. Both phone had 30% of android system but for some reason HTC leaked battery.
Idk what is reason for this, fingerprint sensor? Double tap woke up sensor?
Everything from notification panel was turned off
Sent from my SM-G935V using Tapatalk

The S7edge has amazing battery for me. Have you updated the S7 edge from the VZW update from last week? It has reduced android system drain.
Sent from my SM-G935V using Tapatalk

The new update for the 10 should fix a bunch of issues, not sure when Verizon will release it but the it should be out for the USA unlocked model soon.
Sent from my HTC 10 using XDA-Developers mobile app

TozABG said:
So I have verizon version.
I went to bed with 80% on my HTC 10
And 60% on my S7e also verizon version.
I woke up with 63% on HTC 10 and 59% on S7e. Both phone had 30% of android system but for some reason HTC leaked battery.
Idk what is reason for this, fingerprint sensor? Double tap woke up sensor?
Everything from notification panel was turned off
Sent from my SM-G935V using Tapatalk
Click to expand...
Click to collapse
Did you root or s-off or anything else? Did you uninstall or disable some apps? I had this problem a few times with my HTC M8... Turns out almost always reason was I disabled or uninstalled some apk which gave phone wakelocks... I had 20+% drain through the night and after I fixed it I had 1% per night (8 hours)... So if you have anything changed, flash stock rom and dont delete anything just wipe dalvik cache and cache.. if problem persist you can try factory reset...
Attached pictures you see what looks like when you have wakelocks and how it should be when phone is in deep sleep... No "Awake" when screen is OFF:

I have a completely stock VZW 10 and I lost 15% over night. I've noticed apps will show in usage that I have never opened, mostly Verizon's junk though.

My unlocked version sleeps like a baby. Might be some Verizon apps draining your batteries. I lose about 3% overnight (about 8 hours)

My battery life is not great so far. 2.5h SOT in 7 hours, down to 40%. What happened to the 2 day battery life promised haha.

re1743 said:
My battery life is not great so far. 2.5h SOT in 7 hours, down to 40%. What happened to the 2 day battery life promised haha.
Click to expand...
Click to collapse
Did you fully charge the phone before turning it on? As stated here http://www.htc.com/us/support/htc-10/howto/720800.html
"Before you turn on and start using HTC 10, it is recommended that you charge the battery."

Its probably WiFi drain. Firmware 1.30 should fix it.

re1743 said:
My battery life is not great so far. 2.5h SOT in 7 hours, down to 40%. What happened to the 2 day battery life promised haha.
Click to expand...
Click to collapse
That's pretty good!!
Sent from my HTC 10 using XDA-Developers mobile app

ihavoc said:
Did you fully charge the phone before turning it on? As stated here http://www.htc.com/us/support/htc-10/howto/720800.html
"Before you turn on and start using HTC 10, it is recommended that you charge the battery."
Click to expand...
Click to collapse
I certainly didn't do that, but my battery is pretty good so far

This is one of the reasons why I'm scared to turn in my S7E for the HTC10. The S7E just lasts for ever on a charge. Right now I'm getting close to 8 hours SOT with over a days usage and thats with gaming mixed in.
I just don't want to risk only getting half that with the HTC10
Sent from my SM-G935T using Tapatalk

jrwingate6 said:
This is one of the reasons why I'm scared to turn in my S7E for the HTC10. The S7E just lasts for ever on a charge. Right now I'm getting close to 8 hours SOT with over a days usage and thats with gaming mixed in.
I just don't want to risk only getting half that with the HTC10
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
HTC 10 will probably never do that. S7E has 3600 mAh battery. 10 is only 3000. I'm very happy with the battery of the 10, but I'm coming from the M9 which has rather poor battery life.

vancecwtan said:
Its probably WiFi drain. Firmware 1.30 should fix it.
Click to expand...
Click to collapse
When do unlocked u.s. variants get it? I'm using it with at&t but I'm hoping I get everything directly from htc
Sent from my HTC 10 using Tapatalk 2

patstock11 said:
When do unlocked u.s. variants get it? I'm using it with at&t but I'm hoping I get everything directly from htc
Sent from my HTC 10 using Tapatalk 2
Click to expand...
Click to collapse
Wi-Fi drain? I'm on 1.21.617.3 and only lose 3-4% overnight (about .5%/hr) with Wi-Fi, bluetooth, NFC all on. There is nothing wrong with the stock build as far as battery drain. I also have not modified any Google backups or apps as far as syncing and backups go.

patstock11 said:
When do unlocked u.s. variants get it? I'm using it with at&t but I'm hoping I get everything directly from htc
Sent from my HTC 10 using Tapatalk 2
Click to expand...
Click to collapse
They originally said by then end of the last week but that did not happen, I hope soon though. You will get the updated directly from HTC, not AT&T. I had the unlocked M9 on AT&T and got the Marshmallow update in December from HTC. They still have not released it on AT&T.

ihavoc said:
They originally said by then end of the last week but that did not happen, I hope soon though. You will get the updated directly from HTC, not AT&T. I had the unlocked M9 on AT&T and got the Marshmallow update in December from HTC. They still have not released it on AT&T.
Click to expand...
Click to collapse
At&t w/ their updates is exactly why I left my carrier branded s6. There are some carriers who have sent MM to s5's...at&t hasn't done the s6 yet. Smfh
Sent from my HTC 10 using Tapatalk 2

I'm also having battery drain. I got the phone Monday and that night I lost about 35% overnight. I fell asleep listening to music over bluetooth so I thought maybe that was it. Then Tuesday night I charged it fully before bed. I took it off the charger at 100%, turned the screen off, set it down and went to bed. Woke up about 9 hours later and it was at 59%.
Android system was the claimed highest user, but it said it was only awake for 14minutes. The top 3 listed apps were Android system, Google Play Services, and Phone idle.

I lost 1% over 5 hours in extremepower mode
Sent from my HTC 10 using XDA-Developers mobile app

Maybe the same tricks that worked on the S7E will work on the 10.
You guy's should try turning off all usage statistic reporting to Google and HTC.
Also check in the developer options to see if any bloatware processes are constantly running. If you find one then just disable it's package.

Issue??? Most of time, battery drop 1% after i unlock phone and use it a little

Hi people!
I cannot complain about battery life, specially in stand by (i rarely active use the phone), with wifi always active and during day time whatssapp web active in background, after root, naptime to force doze and other optimization here and there, my battery last till 6/8 days (with little screen time, 10/20 minuts/day), lol.
Problem is the screen use a lot of juice, even if i set up brightness around 55% only.
And, more strange, i lost 1% of battery almost all time i unlock the screen and use the phone a little.
I mean, i unlock for example the phone and im 80% battery, in 20/60 seconds will turn to 79%.
I unlock and use a little when is at 56%, after 10/30/60 second, turn to 55%.. and so on...
This happen most of the time i unlock it to check screen and i play around a little checking apps and doing stuff, but no games or heavy apps.
Im in last January oreo patch.
Is a common "issue", if issue can be called?
Is a behavior other mi a1 phone noticed too?
My phone was behaving like this also before root and before use naptime.

Facing same issues

I have notice this too but also 1 restart cost 1% battery life is this normal? So if I continuously restart phone 5 times it will use 5%, is this like this for other phones too I'm not quite sure?

I don't have such issue, I turned on/off 6 times with delay for about 60 sec and it dropped only 1% the first time, and I keep the screen brightness about 70%
jasmeet21 said:
I have notice this too but also 1 restart cost 1% battery life is this normal? So if I continuously restart phone 5 times it will use 5%, is this like this for other phones too I'm not quite sure?
Click to expand...
Click to collapse
For restart I would say it's normal

Yes, it's the "famous" battery drain on Oreo...it should be fixed with February update.
Sent from my Mi A1 using XDA Labs

N1ck474 said:
Yes, it's the "famous" battery drain on Oreo...it should be fixed with February update.
Sent from my Mi A1 using XDA Labs
Click to expand...
Click to collapse
the battery drain in oreo wasnt about bluetooth and was fixed in january patch?

riccetto80 said:
the battery drain in oreo wasnt about bluetooth and was fixed in january patch?
Click to expand...
Click to collapse
Battery Drain still right here on January update!
With February it's fixed...
Sent from my Mi A1 using XDA Labs

Ok, can you please be more precise? is still a Bluetooth issue the battery drain or is a general issue?
because i always have Bluetooth disabled and i experience this 1% drop as described in first post.

N1ck474 said:
Battery Drain still right here on January update!
With February it's fixed...
Sent from my Mi A1 using XDA Labs
Click to expand...
Click to collapse
please can you give more info about or link to read about? i was sure the oreo drain was only about bluetooth! you seems to know info about another kind of battery drain!

riccetto80 said:
please can you give more info about or link to read about? i was sure the oreo drain was only about bluetooth! you seems to know info about another kind of battery drain!
Click to expand...
Click to collapse
I have battery drain on my phone.
For example, i'm working from 8 AM to 12 AM, now it's 12:30 AM and i NEVER used the phone (i can't) but i have 78% of battery.
Zero Deep sleep for me!
Sent from my Mi A1 using XDA Labs

N1ck474 said:
I have battery drain on my phone.
For example, i'm working from 8 AM to 12 AM, now it's 12:30 AM and i NEVER used the phone (i can't) but i have 78% of battery.
Zero Deep sleep for me!
Sent from my Mi A1 using XDA Labs
Click to expand...
Click to collapse
OK but this seems more a issue of your phone, not a general, operative system base, battery drain.
And your issue dont have similarities with phenom i described in first post in this topic!
You must check what app/setthing keep your phone awake while in stand by and fix it.

riccetto80 said:
OK but this seems more a issue of your phone, not a general, operative system base, battery drain.
And your issue dont have similarities with phenom i described in first post in this topic!
You must check what app/setthing keep your phone awake while in stand by and fix it.
Click to expand...
Click to collapse
Just go on MIUI Forum.
Mi A1 subforum.
There's a lot of posts about battery drain.
It's not an issue of my phone.
AND it's battery in your "phenom" too.
Or you have a damaged battery.
Sent from my Mi A1 using XDA Labs

N1ck474 said:
Just go on MIUI Forum.
Mi A1 subforum.
There's a lot of posts about battery drain.
It's not an issue of my phone.
AND it's battery in your "phenom" too.
Or you have a damaged battery.
Sent from my Mi A1 using XDA Labs
Click to expand...
Click to collapse
well if was battery damaged i didint have so good stand by battery!
Ok, so if there are still oreo battery drain issue probable this explain my experience too!
Good they fixed in february update.

Standby drain

When you sleep, does your phone sleep, or does it stay up all night and crunch 1s and 0s? Rate this thread to express how you deem the speed at which the Xiaomi Mi Note 10's battery drains under standby conditions. A higher rating indicates that when the phone is not in use, the battery drains minimally.
Then, drop a comment if you have anything to add!

standby drain is bad for a 5kmah battery

Such a huge battery drain for me too. Which forces me to recharge the phone when I wake up in order to have a full battery.

Check the CPU frequency. Sometimes it gets stuck over 1248mhz at idle. You have to reboot the phone to get it back down to 576mhz.
There's an app in playstore called "CPU Stats". That app puts a CPU meter in the status bar. Handy for letting you know when to restart

Not sure if thats me but i think ive noticed a drain by GSM, same issue that was on my mi 9 with global rom. try to go to service mode from dialer *#*#4636#*#* and set connection type to LTE/WCDMA seems like its helping at least a little

This became a common Miui issue these days. Had this problem with my Mi9T also, and couldn't resolve it in any way, maybe only by flashing custom rom, but this is not a solution.
Usually it was "cell standby" or "whatsapp" that was draining the battery...and I tried everything, debloating, battery optimizations, network mode changes etc.

I have the same problem. Yesterday I used the Mi note 10 intensely. I did 7h of screen and he was still 40% when I went to sleep. Today when I woke up he was 24%. It drained 16% without any use. I have to find out what is draining so much in Stand By.

I'm sad i'm selling my MI NOTE 10 to whom staying in Côte d'Ivoire (Ivory Coast)

If you are in Europe, just apply the 11.0.16 Ota, if you are coming from 11.0.13 global stable. It fixes the battery drain. Download and install via the updater app.
Download from here: mirom.ezbox.idv.tw/en/phone/tucana/
I was becoming very depressed about this, just got my phone 2 days ago, and the battery was very poor... Hope it helps!

luisarriaga said:
If you are in Europe, just apply the 11.0.16 Ota, if you are coming from 11.0.13 global stable. It fixes the battery drain. Download and install via the updater app.
Download from here: mirom.ezbox.idv.tw/en/phone/tucana/
I was becoming very depressed about this, just got my phone 2 days ago, and the battery was very poor... Hope it helps!
Click to expand...
Click to collapse
My drain was pretty minimal before updating to the newest EU Rom, but now it's much worse.
So not the same experience for everyone I guess.

I guess not... Not really sure what's happening. Waiting to 1 more day to unlock my bootloader in order to install globe ROM (android 10). It should improve battery drain and camera app... Let's see...

luisarriaga said:
I guess not... Not really sure what's happening. Waiting to 1 more day to unlock my bootloader in order to install globe ROM (android 10). It should improve battery drain and camera app... Let's see...
Click to expand...
Click to collapse
Can't really risk that with SafetyNet being seemingly impossible to bypass in the future.

With magisk it's fine, I think...

luisarriaga said:
With magisk it's fine, I think...
Click to expand...
Click to collapse
Well for now, but the tools are in place to completely break it, they just have to flip the switch. Which will happen sooner or later I'm sure of that and not passing Safety Net until some finds another exploit (which can be months) isn't really an option for me.

Wakelocks has been a constant issue for me on MIUI for years with bad standby as a result. This phone is no exception. It was bad on EEA Global ROM. It's bad on Android 10. I love Xiaomi but for the love of god it always has drain issues in standby. 1% per hour is not OK on a phone like this.

wat' said:
Well for now, but the tools are in place to completely break it, they just have to flip the switch. Which will happen sooner or later I'm sure of that and not passing Safety Net until some finds another exploit (which can be months) isn't really an option for me.
Click to expand...
Click to collapse
Yes you're absolutely right,I wasn't aware of this,there is still a bypass but not for long...

MoneyFist said:
Check the CPU frequency. Sometimes it gets stuck over 1248mhz at idle. You have to reboot the phone to get it back down to 576mhz.
There's an app in playstore called "CPU Stats". That app puts a CPU meter in the status bar. Handy for letting you know when to restart
Click to expand...
Click to collapse
I confirm this, the cpu usage was stick around 60% at 1.2ghz, without doing nothing. The reboot fix this, but what cause this problem? This phone 2 days ago get an hard reset.

br193 said:
I confirm this, the cpu usage was stick around 60% at 1.2ghz, without doing nothing. The reboot fix this, but what cause this problem? This phone 2 days ago get an hard reset.
Click to expand...
Click to collapse
I'm not sure what's causes it. It's either a kernel issue or a system app within MIUI 11
It still happens with the latest 11.0.9 update

Hi, any heating issue with drain, during videocall or web browsing with this Mi Note 10 (Miui Global Stable 11.0.17)? I'm from EU. Thank you!

after the Update to Global 11.1.1.0 Android 10 seen great improvement in battery life and standby drain. Dont know if its only me.

Mi 9T battery too cold?

Hi all. Recently my Mi 9T running MIUI 11 has started having some battery temperature issues. The sensor seems to think my battery is -40C and so I keep getting obtrusive popups telling me my phone is too cold. Tried a factory data reset but no luck. I've put some screenshots of the issue up here. Anyone else experiencing this? I might try rolling back to MIUI 10 to see if that fixes it but I'm doubtful...

DanielBerry said:
Hi all. Recently my Mi 9T running MIUI 11 has started having some battery temperature issues. The sensor seems to think my battery is -40C and so I keep getting obtrusive popups telling me my phone is too cold. Tried a factory data reset but no luck. I've put some screenshots of the issue up here. Anyone else experiencing this? I might try rolling back to MIUI 10 to see if that fixes it but I'm doubtful...
Click to expand...
Click to collapse
Sounds like a hardware issue..

DanielBerry said:
Hi all. Recently my Mi 9T running MIUI 11 has started having some battery temperature issues. The sensor seems to think my battery is -40C and so I keep getting obtrusive popups telling me my phone is too cold. Tried a factory data reset but no luck. I've put some screenshots of the issue up here. Anyone else experiencing this? I might try rolling back to MIUI 10 to see if that fixes it but I'm doubtful...
Click to expand...
Click to collapse
-40°? May be a broken temperature sensor. If it's that cold you most probably live on the north pole....
I recently updated from MIUI 10 to 11 by ota and temperatures are fine.
Sent from my Mi 9T using XDA Labs

I have the same problem here temperature stuck at -40 and then when I restart it flashes mi logo and won't start for some time. When the temperate is -40 it won't charge.
Also miui 11 update and a new phone (under 1 month)

Knghan said:
I have the same problem here temperature stuck at -40 and then when I restart it flashes mi logo and won't start for some time. When the temperate is -40 it won't charge.
Also miui 11 update and a new phone (under 1 month)
Click to expand...
Click to collapse
Interesting... That's exactly the same as what was happening to me. I ended up sending the phone back to be repaired. It's worrying as I've heard so much good stuff about this phone. Guess it's not a widespread issue but still sucks. I'm pretty sure it's something to do with the battery/battery connector as I was also getting battery drain and at one point the battery percentage wasn't updating.