Massive battery drain mi 9T - Redmi K20 / Xiaomi Mi 9T Questions & Answers

Hello guys! Yesterday I updated to miui 10.3.15 and i experienced massive battery drain overnight from android os. Last night I charged it full 100% and in the morning it was 19%. And this is with only 20 minutes of SOT. What may be the cause? Airplane mode is on, because I am on vacation in country where i cannot use roaming. I deleted the cache and rebooted the device and I think it is fixed but i will know when I fully charge the device.

try new beta android Q, is awesome for battery life
"9.9.26 - First MIUI 11"

Install Europe version ?

Im on mi-globe 9.9.26 and i suffer battery drain and heating issue

The pix for reference

This happened to me once. I believe is not a battery issue it's more like a process keeping wake up and eating the battery. When this happened to me I reboot the phone and charge it again and issue not happened again.

This keeps happening to me every few days.
I had to manually disable autostart for all apps. And i did not even know which ones I need and which ones I don't.
But it did not help, it keeps reapearing.

Same
This happened to me a few days ago and happens again every few days. I don't remember if it was after the installation of MIUI 11 or earlier, but I would think it is a software issue that Xiaomi should investigate.
The only solution I found was to close all applications and restart the phone before charging it.

I have no issues, my advice is whenever installing an os update it's always best to do a factory reset in order for the phone to run at optimal performance. When i updated i did not reset my device but i made sure to clear all app cache and reboot the phone after update. My SOT is normally 8-9 hours, also i made sure all my apps are up to date and their are no background apps that are draining my battery.

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Battery draining even while the note is turned off or in airplane mode.

Is there anybody else with this problem.It started monday i turned my phone on but it didn't start.The battery was 0% while i shutted it down with 78% of juice left.I charged the battery but it drains down real fast!Even with the screen off at night and no wifi or edge/3g/4g i still lose about 10% every hour!
I've used the note for two weeks without any problem.Rooted with Xposed Greenify and most of the bloatware disabled.Same setup as my Notepro 12.2 and galaxy mega(no problems with those devices).Battery life was pretty good about 5 a 6 hours of screen on time.
Tried better battery stats but no particular wakelocks or anything??I've ordered a new battery and that will arrive tomorrow.I can do a test then if it is the battery or the phone which is causing this problem.
It's a note 4 910c.
I have similar problem with my 910C...Everything was ok for first two weeks and problems started when I enabled LTE at my mobile operator. No matter what I do, I have huge battery drain like you said. I've also tried with disabling 4G/wifi/data/sync/airplane mode/removing apps... I even tried factory resetting 2-3 times and flashing stock rom via odin...Nothing helps...
I'm looking around on various note4 forums but I'm getting out of ideas...
I had an initial battery drain issue which ive managed to resolve. Took a few factory resets but for me it looked like the galaxy apps ap. Once you open it a single time it updates a few things and thats when i started to see wakelocks. Ive reset and avoided the galaxy apps completely and now wakelocks have gone. Might be a placebo but seems to work for me.
I have 2g,3g and lte enabled.
Oke i enabled 4g from the first time i used it so i don't think that is the problem.I was thinking about a factory reset but i'll wait with that untill i tested the new battery.
Will give a update tomorrow!
I had the same problem after one week of normal use. It was a hardware issue and the service center changed the phone board under warranty.
Well tried a brand new battery but still the same!Lose at least 10% every hour and i am not even touching the phone!!Sending it back for another one.
It's happened to me once but touch wood only once where I lost 70% overnight in airplane mode
Could be the media scanner? I was having media server and scanner drains until I installed a custom rom and disabled it.

Standby drain 8.1 OPM1

I seem to be losing between 8-10% overnight since clean flashing OPM1. Anyone else seeing this? I can't peg it on a particular app and accubattery reports anywhere from 0.8-1.2% loss with screen off. If I just tap the power button to see accubattery stats, the current drain without going into anything ranges from 54mah to sometimes as high as 150mah. I may try a factory reset to resolve but curious to what others numbers are.
I'm using latest stock 8.1 and find it has the best standby I've ever seen. Either your battery is over year or two and starting to degrade. Or you need to do some spring cleaning when was the last time you backed everything up and wiped internal. You'd be amazed the wonders that does with rogue apps and missfunctioning features after completing wiping and installing fresh copy of stock.
Exodusche said:
I'm using latest stock 8.1 and find it has the best standby I've ever seen. Either your battery is over year or two and starting to degrade. Or you need to do some spring cleaning when was the last time you backed everything up and wiped internal. You'd be amazed the wonders that does with rogue apps and missfunctioning features after completing wiping and installing fresh copy of stock.
Click to expand...
Click to collapse
Just bought a new OEM battery that is reporting 101% capacity so that's not it. Also, clean flashed 8.1 when I loaded it although I restored from my cloud backup. I just factory reset today but honestly, I felt it was worse so I completely blew everything out again, redownloaded 8.1 and flashed again. This time I chose to set up as a new device without using the cloud backup. The only thing I manually backed up and restored was text using a 3rd party app. I am adding my apps back a few at a time but it seems to be a little better as of now but will have to give it a couple days to settle down. Not rooted yet either.
Some are reporting that "mobile data always active" is enabled by default in developer options on 8.1. Have you tried disabling this?
To compare this with op, I got 84% battery health and a drain over night of 4%. Stock 8.1, Nova launcher beta, SuperSU beta, mobile data always active is off. May an app is responsible for your 10% draining ? Any social stuff like fb ???
I turned off mobile data always active and when I clean flashed the second time, I did not put any social media apps on the phone but saw no difference. I ended up putting fb, messenger lite and Instagram back on and they aren't impacting negatively. It's only been 2 days and have only rebooted a couple times.. battery is still reporting 101% capacity. I'll give it a another day or 2 to settle down bc at some points it seems to be very efficient while others it doesn't but that's better than before the 2nd clean flash.
Looking at my accubattery stats, I'm still losing about 1.1% battery per hour with the screen off. I also noticed that so far in the ~7 hours my phone has been off the charger today, it's only been in deep sleep about 51% of the time that the screen has been off. What happened to the built in wakelock detector that was highlighted in https://www.phonearena.com/news/Android-8.1-Oreo-wakelocks-battery-draining-apps_id99715? Does anyone see this actually working or is this yet another "Pixel exclusive". I cannot figure this out so I guess I'll have to download a 3rd party wakelock detector but the reality is, even if I do find the culprit, it's usually not anything that is easily identifiable or fixable. Am I really the only one having this issue??

Mi 9t drains battery under night

Hello, is this happened to everyone else? It just drained down to zero in just one night, any fix?
is This happened to you after charging your phone? This happened to me once, I was charging my phone and after reach 100% I unplugged this was on the night, 6 hours later in the morning I noticed battery was 4% this means 96% was eaten on that 6 hours. I was on a rush, so rebooted the phone and plugged to the charger again. Like I said this happened once. I'm not sure if some app/google service/service keep my phone woken all that 6 hours.
It happened to me also. Same as above comment
log1321 said:
is This happened to you after charging your phone? This happened to me once, I was charging my phone ...
Click to expand...
Click to collapse
Same for me too, but my phone was fully drained.. Maybe a software update will fix it.
Happened to me before debloating my phone and while keeping the phone under a pillow.
Maybe a clash with the feature for detecting if you're using the phone to show the fingerprint icon on screen? I disabled that too now.
Happened to ne yesterday. Weird. Eea stable 10.3.12
it's pretty crazy. it happened to me 2 times. battery drains is insane, about 15mins I lost 8 to 15 percent!!!
first time I did everything I could to stop it but no luck, I decided to do a factory reset and it was fine for two weeks. the second time started yesterday, I even tried gsam battery and enabled the more stats using adb. all it could find were consuming the battery are :
1- kernel android os
2- system adsprpcd
I've tried these still no luck.
1- clear data :
play store
play services
google
2- disable dual sim 4g - note: I use one sim.
3- disabled all the apps in permissions>start in background
4- uninstalled about every apps I've installed
In my case I struggling with Google Play Services eating up my battery, I tried everything (xiaomi.eu rom, full restore, clear cache of Play Services etc...)
The issue it's still present even with updating the app with the newest versions. You could check you consumption to see what's using your battery
C0rn3j said:
Happened to me before debloating my phone and while keeping the phone under a pillow.
Maybe a clash with the feature for detecting if you're using the phone to show the fingerprint icon on screen? I disabled that too now.
Click to expand...
Click to collapse
Not very healthy habit btw, better not to have the phone so close to your head all the time as battery consumption could be later your least problem.
Did your steps helped in that situation? As if pillow would be the culprit, some of the flip covers could cause the same.
mik9 said:
Not very healthy habit btw, better not to have the phone so close to your head all the time as battery consumption could be later your least problem.
Did your steps helped in that situation? As if pillow would be the culprit, some of the flip covers could cause the same.
Click to expand...
Click to collapse
I didn't have the issue since, but I don't recall leaving it under a pillow since either.
My entire phone setup is documented here so you can try uninstalling the crap I've uninstalled and the relevant settings for the FP scanner.
https://gitlab.com/C0rn3j/C0rn3j/blob/master/androidSetup.sh
log1321 said:
is This happened to you after charging your phone? This happened to me once, I was charging my phone and after reach 100% I unplugged this was on the night, 6 hours later in the morning I noticed battery was 4% this means 96% was eaten on that 6 hours. I was on a rush, so rebooted the phone and plugged to the charger again. Like I said this happened once. I'm not sure if some app/google service/service keep my phone woken all that 6 hours.
Click to expand...
Click to collapse
for me happend just like this, after unpluging the charger almost 90% ... after 5 min the phone was still hot ...and the battery was draining faster ... after 1 hour i lost like 30 % so i just rebooted the phone and it stopped.... just happend once

Battery percentage issue on z17s

Hi.
Yesterday I was using my Nubia z17s as always and before going to bed I decided to charge it, since battery was at around 20%.
When I connected the charger, the screen went off and it didn't wake up, no matter what I did, although I could feel the fingerprint scanner vibration when I used any of the registered fingers. So I decided to hard reboot the phone by keeping the power button pressed.
To my surprise, when the phone booted again, the battery percentage showed 3%. I left it charging overnight and now it's working but the battery percentage is stuck on 3%. I'm pretty sure it's more than that, since I've been using the phone for more than 6 hours and the battery percentage hasn't dropped a bit, and the phone is working (I've made an received a few calls).
A guy at work suggested letting the battery drain completely until the point the phone shuts itself down, and then charging the phone up to 100% while off, so the battery is calibrated and the percentage is fixed. But I've always heard that it's not a good idea to let a battery drain so much. Another problem is that I fear not being able to charge the phone again once the battery gets below 3%.
Any ideas? The phone is running latest Mokee 9 Premium.
Thanks in advance.
Remove "batterystats.bin" in the System folder
Tomcar said:
Remove "batterystats.bin" in the System folder
Click to expand...
Click to collapse
I had already tried that. But deleting that file just resets the battery usage statistics. It has nothing to do with the battery percentage
It seems to me that you will have to make a full data backup and perform a factory reset.
ps and which firmware in use?
Hi, I forgot replying.
I finally got the phone up and running again, and the issue seemed to be firmware related.
I was running the phone on Android Pie based Mokee ROM. I finally let the phone discharge until it shut down and charged it while off. Battery got up to 100% and the phone seemed to work fine. But, a few weeks later, something similar happened again, so I reverted to the stock firmware (still stuck at Android 7.1.1) and the battery issues went away.
I recently tested the Android 10 based Mokee and found that it reports battery level very differently than the stock firmware. Before flashing TWRP and the Mokee ROM, the phone was showing 88% battery left. Just after booting Mokee, the phone had apperently dropped to 78% and I also felt quite a huge battery drain. And it had only taken me around 5 minutes to install the recovery and firmware. So I guess the Mokee firmware doesn't handle the battery very well on Nubia z17s. It's a pity, since all the rest works very well, and I quite liked the Android 10 experience. On the other side, I was unable to make Magisk work under Android 10, and Google Pay is a must for me now, so I once again went back to stock firmware.

Battery Drain when off

Has anyone any ideas, if I turn my x727 off the battery will drain to zero in a few hours. If I just set to airplane mode battery is good for three or four days. Accubattery shows battery in low nineties for remaining capacity. Currently using AICP pie ROM but also did this on lineage and AEX ROMs. I don't even know what to check as phone is off. Any help appreciated.
nartex2 said:
Has anyone any ideas, if I turn my x727 off the battery will drain to zero in a few hours. If I just set to airplane mode battery is good for three or four days. Accubattery shows battery in low nineties for remaining capacity. Currently using AICP pie ROM but also did this on lineage and AEX ROMs. I don't even know what to check as phone is off. Any help appreciated.
Click to expand...
Click to collapse
Only thing I can think of in order to discard some things are:
When did you notice this? after some modding? Have you flashed the recomended firmware for your device from the first post of AICP thread?
Then just for test:
While the device is off, connect the charger to see if the charging screen appears.
Then power on and once in AICP reboot to TWRP and from there just power off with TWRP menu, wait few hours, power on and see if there were battery drain while off.
Regards.
Thanks, it has done it for about one year, kind of thought about powering down from twrp. Have just been hitting airplane mode instead of powering down all this time. Firmware is correct. I thought something must be hanging. Appreciate the insight.
Just tried the shutdown from twrp. Battery went from 45 to 16 in one hour of shutdown. I am befuddled.
hello i have the same problem. i bought Lex722 as used one
i installed fresh Lineage OS.
when phone is off it drains in about 1-2 days down.
So i replaced the Battery with a new Battery. But... it get also down.. to i think its an hardware problem
one more thing: i charged from 0-90% . the Battery gets really hot. (Original charger). so maybe something with charging unit in the phone not ok
I have an X722 and I have a similar problem, after changing the display I have some problems like the one you mentioned, battery drain in stand by and my smartphone charging above 80% it shuts down and starts draining the battery, has anyone tried Qfil to try to solve this problem? or is it a hardware thing?
sorry if my English looks bad I'm using a translator
Daniel Doughlas said:
I have an X722 and I have a similar problem, after changing the display I have some problems like the one you mentioned, battery drain in stand by and my smartphone charging above 80% it shuts down and starts draining the battery, has anyone tried Qfil to try to solve this problem? or is it a hardware thing?
sorry if my English looks bad I'm using a translator
Click to expand...
Click to collapse
I think I had something hanging and the phone not really shutting itself off completely. Did a wipe when doing an update and it fixed itself.
I have similar problem too, have X722, started somewhere in summer, spring where basically discharged by 10-20% daily when not using..
I always update to latest AICP. Just replaced battery today and still seems there is a small drain, charged to 100% for the first time, 2 minutes of usage and already down by 3%.
This may or may not help. You need to track down all the hogs. These were two that caused me endless issues. I tried disabling backup by switching it off and this and that... until going full rambo on Google.
Google Backup Transport and Backup Framework wuv to run amuck even with screen off.
I finally package block them and firewall blocked them. Clearing their data, as well as Goggle Play Services* and system/residual data caches if they act up.
Now it's stopped.
>1%@hr battery drain with AOD always on.
AT&T Note 10+ Pie
*enabled as needed for gmail, gmaps, playstore.
blackhawk said:
Google Backup Transport and Backup Framework wuv to run amuck even with screen off.
Click to expand...
Click to collapse
Can I successfully disable them by just disabling their services in MyAndroidTools? (just checked and i already had them disabled)
I also have Magisk module - Universal GMS Doze.
rudolph323 said:
Can I successfully disable them by just disabling their services in MyAndroidTools?
Click to expand...
Click to collapse
Yeah but portions* will still run in the background just like the malware it is.
Hence the firewall and the frequent data deletes.
Maybe 10 or 11 is better behaved but it doesn't seem that way from what I'm reading... they look worse than Pie. With unrooted phones they even block more user diagnostic tools than Pie, perfect. Pretty sure my 10+ will run on Pie for its whole service life because Google dropped the ball.
Fortunately Pie is a good OS... add to that AT&T and their partner Samsung are notorious for device killing near update end cycle firmware.
Not updating is simply an act of device self preservation.
*hopefully you can pull these weeds out better than I can on an unrooted device.
Each user/device is different though, good luck

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