Battery life on MIUI 12 (EU) - Xiaomi Mi 9 Questions & Answers

Typically if I take my phone off charge around 8am and don't use it, I still have 94% or more battery left by lunchtime.
Updated it to MIUI 12 last night, today I took it off charge around the same time, right now it's 1pm and I have 61% battery left.
That's a horrendous change. If I was using it I don't think I could see a full day out now.
This is a vanilla Mi 9 on stock everything, never fiddled with.
Anyone similar experience yet?

Miui 12 has the worst battery life, sot and usage time i have ever seen. I tried the beta for about 4 weeks, stable just a few days but its the same. Xiaomi should never published this as "stable". A lot of users had those problems with beta for weeks and reported it but nothing changed.
I switched back to miui 11 just for not killing my battery within months.
Edit: testing 12.0.2 and it looks like they solved the battery drain bug with this update

I'm on Xiaomi.eu Rom (latest stable MiUI12). Battery life is nearly the same as MiUI11.
MiUI11 end of the day: ~30-35% remaining tipically
MiUI12 end of the day: ~20-30% remaining
So for me this is not bad for the first MiUI12 builds. First MiUI11 builds were more worse for me...

The worst battery drain I have ever experienced. Its good on standby, through the night goes down by 1% but during the day I lost 70% using google maps and data for an hour. With miui 11 I would have used maybe 20 max. im gonna root my mi9 and go back to 11 cause I dont think xiaomi is going to fix it any time soon

I've seen it so many times before... Once the phone is not the top flagship in OEM portfolio they don't care about the quality of the update. I don't think it's ever going to be fixed. Get used to it or go Custom ROM

Happens only on the first day of upgrade from MIUI 11. The next days are even better. It's easy to pass full day (normally I got around 1.25) with around 5-6H SoT.

leledumbo said:
Happens only on the first day of upgrade from MIUI 11. The next days are even better. It's easy to pass full day (normally I got around 1.25) with around 5-6H SoT.
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Click to collapse
For me it's just impossible. It's easy for me to get high SOT when I watch something with screen on all the time but it looks like phone have a hard time getting into deep sleep mode so it hurts standby time.

Weird. We all have different problems. My mi9 goes into deep sleep without any problems. I can also get 6h screen time but when I use data baterry goes really really fast. I can easily go from 100% to 10% in 3h using only google maps :/

Yeah battery drain on miui 12.0.2 is awful. my android system usage stats is about 43% right now? and they also remove Override Force Dark Mode option from developer options which was so usefull for me? we probably haven't need IOS notification style!

Related

4.1.0 battery drain

Since update to 4.1.0 - quite heavy battery drain. From 100% to 35% in about 8 hours which is very unusual for me. I usually get 36 hours.
Am seeing in battery usage that says Android OS 11% and Android system at 9%, phone idle 6%
I'm not rooted or bootloader unlocked. Just updates via OTA from 4.0.3
I've tried clearing cache from recovery and cache from phone storage.
Any suggestions or is it factory reset?
Hasn't happened to me since the update. You should at least try with a factory reset before worrying about anything.
Just let it settle for couple of days and check then again.
Don't clear davlik/ART from recovery if suffering from battery drain. Remember on past android versions after doing that or clean flashing? It would spend a lot of time "android is optimising", Nougat now processes this in the background at a lower level of CPU over god knows how long.
So i would just let it settle for a few days and then judge.
Saying that i clean flashed 4.1 over OB3 and recovered my backup and it's not too bad on my side.
Running 4.1 stock with blu_spark.
36h????? seriously????
craigzhong said:
36h????? seriously????
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Click to collapse
Oh yes. If anything, battery life has gotten worse and worse for each new release of Oxygen.
white43 said:
Oh yes. If anything, battery life has gotten worse and worse for each new release of Oxygen.
Click to expand...
Click to collapse
The best battery life i had was on 4.0.3 with Franco, I had no Android OS or system drain. Somehow managed to get 7 hours and 41 minutes of screen on time. 4.1 has frequent drain of about 4% every hour but if anything its all the things settling down. I will update after few more days.
I have a real problem with WhatsApp and social apps in this release, their consume are huge...
It oddly got better, I'm doing a little worse than 4.0.3 at the moment but i'm sure it will get better! I took off my phone from the charger before going to bed and when i woke up it was at 92% ; I slept for 11 hours. Its rather odd that once i turned off my finger print scanner, I was able to get even better battery life. I managed 6 hours and 52 minutes. Can someone else confirm if the fingerprint scanner plays a role or not?

Redmi 4X battery life

Hi all, i got this phone for my girlfriend, expecting awesome battery life...but it turned out is less then awesome...a day and a half with light usage...draining around 10-15% overnight. i can't post screenshots but the battery utilization says that around 30% battery usage is made by system. It is the global version running MIUI 8 Global stable 8.2.9.0 if i remember correctly...any hint on how to get better battery life?
I am getting great battery life with this phone. I am on latest Global 8.2.12.0 version.
As I type this on my redmi 4, battery stats shows 5+ hours of screen on time and its been 1 day 9 hours since full charge and still 45% battery left
virajk said:
I am getting great battery life with this phone. I am on latest Global 8.2.12.0 version.
As I type this on my redmi 4, battery stats shows 5+ hours of screen on time and its been 1 day 9 hours since full charge and still 45% battery left
Click to expand...
Click to collapse
Im getting these. Whatsapp and some random no sense things like taking some shots
imagenti.li/Lzd.png
use Security App in MIUI
Try Formatting the device... or If you're on Official MIUI ROM try security option.. clean junk, stop background apps etc. etc.
Try reboot your device after full charge. I think it cannot go into deepsleep after charging. It is a error wich also happens in redmi 3s. But when you Start your phone again after charging it might be better.

Battery life is worse after Android Pie (9):

Hello!
I've been experiencing worse battery life on my Nokia 8 since Pie upgrade, I haven't installed any apps nor services...
Note that the battery improved -but not as good as Oreo- after calibration using an app...
Are you experiencing the sane issue? Or should I further investigate?
Thank you..
yes
Same here. I got 12 hours screen on time once on oreo but now, it is a dream. Battery drains fastly due to background services. App restriction doesn't work as well as oreo's restriction. So, this situation causes battery draining. Also there is a weird thing i've faced, battery drains quickly from %100 to %95. I am waiting for Maintenance Release impatiently.
is battery life on oreo really that good?
I'm using pie since day 1 and never got more than 7h sot and 1.5 days.
My battery life is dire since pie, I was impressed with the battery in the 8 until this update, I cant even make a day without having to charge. When I say day I mean from 7am to 10pm as its left charging overnight.
Before pie I could quite happily last 2 days between charges, I'm not a heavy user, initially I thought I must be using the phone more. But I'm actually using it less just so it makes it to the end of the day!
Somehow it's worse again today, dead by 4:30!
Basically just checked phone to see the time, around 10 minutes of faffing in the morning, rebooted it before charging last night incase sonething was using battery. Madness!
For me, I've given my phone a factory reset before I installed the Beta labs/initial final(V5.110, December 2018-January 2019) build. Despite that, I did notice my battery life taking a hit when running this iteration of Pie. I was at most getting not more than 5 hours of SoT on average. And I do use my phone a lot throughout the day, the camera, web browsing, videos and social media. Meanwhile on Oreo, I can get 6 hours on average no problem. Sometimes even 7 hours if I'm lucky.
After updating to V5.140(February 2019) with Adaptive Battery brought in, I seem to have gotten back my average SoC just like when my phone was running Oreo. Running 5-6 hours on average. I'm not sure if Adaptive Battery has anything to do with this since I did notice the improvement immediately. I also disabled some of the Evenwell crap before updating to V5.140, so that may or may not have an effect.
If apps restricted didnt work then try manually restrict each app go to ur up hold it then info Then choose battery from there change background restriction
Ifaced this problem in beta when iwas sleep and wake up morning my battery was almost below 20 percent but i manually restrict all apps and its working 100 percent ?
Sorry to heat that. Have you tried installing some apps like better battery stats to see what exactly is saying up your battery? If your phone is rooted consider installing ForceDoze from f-droid and maybe WakeBlock to regulate some wakelocks that may be the cause of your terrible battery life. I have been able to get great battery life using the latest put version. See screenshot below from a few days ago.
I know that this is old thread but i have solution which i use with my nokia. change default launcher to another lightweight. This works and my battery feel better.
I should of updated, battery went back to normal after newer updates.
However, biggest thing for me, using DNS666 Ad blocker has seemingly doubled my battery life, might be a combination of just gotten bored of the phone or blocking all the ad's saves battery, or a bit of both, its also made the phone feel a lot more responsive overall, i'm using Squarehome as my launcher so maybe that was affecting the battery before?
Maybe which update can fix battery life? I rooted my phone and can't download latest update.

Battery friendly ROM

I'm using xiaomi.eu 12.0.5 QFACXNM and the battery drain is brutal: 11% battery drain at night in 9 hours without touching the phone. No airplane mode, but wifi and data off.
I restricted almost all apps at background and problem is not solved. I'm doing 3h SOT or even less at day.
So... what's the rom with the BEST battery and the best SOT? I don't mind the other features, if it's AOSP I appreciate if I can install ANX camera and GCAM (both).
Thanks.
pavoleo said:
I'm using xiaomi.eu 12.0.5 QFACXNM and the battery drain is brutal: 11% battery drain at night in 9 hours without touching the phone. No airplane mode, but wifi and data off.
I restricted almost all apps at background and problem is not solved. I'm doing 3h SOT or even less at day.
So... what's the rom with the BEST battery and the best SOT? I don't mind the other features, if it's AOSP I appreciate if I can install ANX camera and GCAM (both).
Thanks.
Click to expand...
Click to collapse
I had very good battery results with PixelExperience - around total 40h with 3h screen on time (yeah not heavy usage). Right now I'm trying PA Q5
xikz said:
I had very good battery results with PixelExperience - around total 40h with 3h screen on time (yeah not heavy usage). Right now I'm trying PA Q5
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Click to collapse
3h SOT is not a good result, don't you think? I was expecting something like 5h or 6h of SOT with a normal use... I know with 3300mah battery it's complicated but I don't use my phone with heavy apps, I don't play, only use instagram, photos, twitter, whatsapp/telegram and stuff like that...
I recommend PA.
pavoleo said:
3h SOT is not a good result, don't you think? I was expecting something like 5h or 6h of SOT with a normal use... I know with 3300mah battery it's complicated but I don't use my phone with heavy apps, I don't play, only use instagram, photos, twitter, whatsapp/telegram and stuff like that...
Click to expand...
Click to collapse
for a 40h+ total with bluetooth location and wifi always on I'd say it's a very good result
I'll check both. I fully charged my phone this morning. 7 hours later, without any use (check my instagram and twitter couple of times and responding some whatsapps), it dropped 10% (to 90%).. At least six and a half hours were in deep sleep.
I think this isn't normal.
That also can be a signal for a dying battery as well. Approx. 1 % per hour in combined usage is a good average for AOSP ROMs. At moderate use, similar to your profile, the battery here last for four days with 4 h SoT. 8 h SoT over two days is possible but not what I reach often. Mi9 is running PAQ5.
Cheers
Toscha
toscha42 said:
That also can be a signal for a dying battery as well. Approx. 1 % per hour in combined usage is a good average for AOSP ROMs. At moderate use, similar to your profile, the battery here last for four days with 4 h SoT. 8 h SoT over two days is possible but not what I reach often. Mi9 is running PAQ5.
Cheers
Toscha
Click to expand...
Click to collapse
I was thinking the same. At this hour, less than 12h after the last full charge, and with no use at all cause I'm currently working at home, so I use computer (like I said, watch a couple of times instagram, reply to a few whatsapps and check twitter a little) battery is at 80%, with 30 minutes of SOT. Something is wrong, and maybe you're right about battery.
I'll try PAQ5 and crdroid with quantic kernel... despite I like MIUI, but xiaomi.eu is an extreme battery-draining rom...
My Mi 9 is running several AOSP ROMs since more than one year. Since then I've simply no idea about Miui and its battery consumption. Tbh I'm not too much interested in battery life at all. I'm not an outdoor guy having access to a power plug only once in a while. I'm living in an area where power plugs are widely available. So running out of power is not a major threat to me.
Cheers
Toscha
toscha42 said:
My Mi 9 is running several AOSP ROMs since more than one year. Since then I've simply no idea about Miui and its battery consumption. Tbh I'm not too much interested in battery life at all. I'm not an outdoor guy having access to a power plug only once in a while. I'm living in an area where power plugs are widely available. So running out of power is not a major threat to me.
Cheers
Toscha
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Click to collapse
I usually have a charger near, but it happened to me that, in a long session of photos, or in a heavy use outside my home or my work, battery dies more sooner than later... and that sucks.
For example, watching forums or instagram, it consume 1% each 5-7 min, and more of that, instagram and web loading are not so fluent as it should be, so... I'm gonna try aosp for a while.
Crdroid, Paranoid and Iodé OS seem the best choices, I'll give a try to the best battery-saver rom...
Changing ROM only might not solve your battery problem, if the problem lies elsewhere. I use the same ROM and I could get 4-6 hours SoT per charge, over a day of use or so. This is a 1 year old device so battery is no longer 100%. If yours is newer but you get worse result than mine, then it's something in your configuration, not the ROM.
Sure, in these cases I usually carry a power bank with me. Actually I can't recall when last time my phone totally went off power.
For the AOSP ROMs I can't tell about battery behaviour. Things like SafetyNet, banking app and G-Pay are so much more important to me that I never considered changing the ROM since PAQ5 does simply everything I need.
Cheers
Toscha
Read this: https://forum.xda-developers.com/Mi...ttery-life-t4123079/post82968297#post82968297
this phone has some hardware issue with the battery, some chip is not properly registering/measuring. You have to "reset".
I have more than 8h screen on time 0~100, and I have the phone 15 months.
.eu miui 12
pavoleo said:
I'm using xiaomi.eu 12.0.5 QFACXNM and the battery drain is brutal: 11% battery drain at night in 9 hours without touching the phone. No airplane mode, but wifi and data off.
I restricted almost all apps at background and problem is not solved. I'm doing 3h SOT or even less at day.
So... what's the rom with the BEST battery and the best SOT? I don't mind the other features, if it's AOSP I appreciate if I can install ANX camera and GCAM (both).
Thanks.
Click to expand...
Click to collapse
I got same problems with you and in my case. I found out that my mobile signal was not stable, then phone auto switch network try to find 4g -3g -2g and it happened couple of times. When I' back to my hometown, battery is only down 2%.
leledumbo said:
Changing ROM only might not solve your battery problem, if the problem lies elsewhere. I use the same ROM and I could get 4-6 hours SoT per charge, over a day of use or so. This is a 1 year old device so battery is no longer 100%. If yours is newer but you get worse result than mine, then it's something in your configuration, not the ROM.
Click to expand...
Click to collapse
I was thinking the same, battery duration is ridiculous. Last night, 1% battery per- 5-6-7 mins using kiwi browser/instagram. And 10% battery out last night with wifi and data deactivated. Now I have 56% battery with very few use of the phone. Charged it 24h ago.
toscha42 said:
Sure, in these cases I usually carry a power bank with me. Actually I can't recall when last time my phone totally went off power.
For the AOSP ROMs I can't tell about battery behaviour. Things like SafetyNet, banking app and G-Pay are so much more important to me that I never considered changing the ROM since PAQ5 does simply everything I need.
Cheers
Toscha
Click to expand...
Click to collapse
I don't have a powerbank, I think I should buy one... Like I said, I still have problems with Internet, instagram stories and some webpages load slowly even with WIFI, so maybe it's a ROM problem...
onolox said:
Read this: https://forum.xda-developers.com/Mi...ttery-life-t4123079/post82968297#post82968297
this phone has some hardware issue with the battery, some chip is not properly registering/measuring. You have to "reset".
I have more than 8h screen on time 0~100, and I have the phone 15 months.
.eu miui 12
Click to expand...
Click to collapse
Thank you so much, I'll try to follow that guide.
cepheus002 said:
I got same problems with you and in my case. I found out that my mobile signal was not stable, then phone auto switch network try to find 4g -3g -2g and it happened couple of times. When I' back to my hometown, battery is only down 2%.
Click to expand...
Click to collapse
I live in a great city and and I haven't gotten out of it since the pandemic started, so I don't think that's the problem...
I have miui 11 .eu rom, I have a post explaining how to get 8:30h sot
Your problem is xiaomi crap that are draining your battery and making the phone not measure it correctly.
Xiaomi programmed obsolescence on battery
H, since I updated from miui 10 to miui 11 and even now that I have miui 12 I have noticed that the battery doesn't last as long as before. I state that since I purchased the phone (July 2019) I have always charged the battery in the best way...
forum.xda-developers.com
onolox said:
I have miui 11 .eu rom, I have a post explaining how to get 8:30h sot
Your problem is xiaomi crap that are draining your battery and making the phone not measure it correctly.
Xiaomi programmed obsolescence on battery
H, since I updated from miui 10 to miui 11 and even now that I have miui 12 I have noticed that the battery doesn't last as long as before. I state that since I purchased the phone (July 2019) I have always charged the battery in the best way...
forum.xda-developers.com
Click to expand...
Click to collapse
Hello im using miui 11.0.6 with a new battery and i get 4:14 on SoT, what version of miui do you use?
I on my xiaomi mi9 I installed the battery increased by 4000mha, I changed the kernel values with a file manager by making the phone read the same battery capacity and I do six hours of display on! To do this you must have root permissions and buy 4000mha battery ...
the path to take with franco kernel manager is:
/sys/class/power_supply/bms/charge_full"
/sys/class/power_supply/battery/charge_ful
Through a file manager, that is the path to follow to edit the file

A13 Bluetooth Battery Drain

Anybody else notice battery life drops fairly quick when using earbuds?? I notice like a 15% or more drop after maybe an hour. On A12 I could go all night at the diamond drill and still have 40% after a 12 hour shift but there's no chance of that on A13, I'm on the latest LOS but I found it was more or less the same on stock rom too. Maybe it's just an Android 13 thing

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