Develop Bugs

"Android OS" Eating All my battery!

I have the CDMA Desire. I am running Cyanogen 7 Nightly.
Even on older Cyanogen ROMS (6.1.1) I always had the issue of Android OS taking up my battery. I looked at my phone when i woke up to see it was at 11% even though it was idle all night AND fully charged when i went to sleep. Don't know the problem. Perhaps somebody could point me to a battery efficient kernel? Or help me solve the issue

If you barley use the phone it's logic that the android os will take most of the battery. Do you use taskkillers? If yes, don't.
And about your drain, do you have the wifi sleep policy set to never?
settings-wireless and network-wifi settings-hit menu-advanced-wifi sleep

Task killers? No, they are really more of a myth than anything!
Wifi Sleep Policy is set to when screen turns off.
I also forgot to mention in the first post that it took up 77% of the phone's battery.

I hate to bump, but bump.
I switched launchers to see if that would help, i'll update when i find out

Maybe this?
http://code.google.com/p/android/issues/detail?id=11126
Also, check for programs in the background which are using a lot of CPU (like OS Monitor from the market).
Make sure you wifi sleep policy is set to NEVER! (Under settings > Wireless & Networks > WiFI settings > Advanced

Faulty battery?

one thing i noticed with my own battery drain is that i had my tweetdeck updating every 15mins, prehaps you have things that are sync all the time?
also i saw in a post somewhere in XDA that it is just how the batteries work, the lower battery charge you have the faster it will run out.

JeremyLeroy96 said:
I also forgot to mention in the first post that it took up 77% of the phone's battery.
Click to expand...
Click to collapse
Widgets? System info widget literally wasted my battery even when not used. Removed and happy about it. Shame you don't get a refund
Check your widgets in the market if there are users complaining about them.
TheGhost1233 said:
If you barley use the phone it's logic that the android os will take most of the battery.
Click to expand...
Click to collapse
Cell standby will _always_ use more if the OS is operating normally.
Sent from my HTC Desire using Tapatalk

I try to keep my phone from using too much stuff in the background. I have Pulse, Twitter and Google Maps (can't stop it) in the background at all times and can get 2 days usage out of it. Widgets and apps running in the background usually are the culprit but if you haven't got a lot of stuff running in the background then I would say faulty battery.

Fixing battery drain on your s3

I have done pretty extensive testing in the last few days and this is what I found.
TOUCHWIZZ USERS ONLY, uninstall and delete data for the app my uploads. It syncs your gallery with picasa and uses a load ofdata and battery. It won't break anything. turn off instant upload in Google+. Turn off smart stay and motion actions. they use about every sensor in your phone. Turn off the wake up phrase in s-voice. If its on it is always listening for that phrase. I'll keep looking for other things but I got fairly good battery life just doing those things right there.
When uninstalling an app, wipe cache and data first. This will clear any background processes that could stay after the app is gone.
Install es task manager and kill everything you don't need to run on startup to preserve boot time/battery usage. Also it will keep the processors a lot lower.
All accelerometer and other hardware functions use a significant portion of your battery. If you don't use landscape mode turn auto rotate off because it uses that precious battery life.
Weather bar in notification drop down and on your lockscreen will destroy your battery life. Weather widgets also use quite a bit of battery.
Facebook app also kills your battery because its always connected to the internet. Syncing Facebook account to your phone further wears down your battery. Any game or other app that connects to facebook will also do the same.
Look in data usage under settings. Anything on that list uses more battery because its connected to the internet.
If your not in an lte area turn lte mode off because your device will be searching for a signal it will never get.
Low signal strength kills your battery because your phone has to use more energy to hold connection to the network. If you have WiFi at home and bad cell service (or anywhere) use WiFi because its easier it is for your phone to hold good wifi signal than bad cell signal. also turn off your NFC. It uses more battery than Bluetooth does.
Get better battery stats app and look for wake locks because without deep sleep you will never get more than 12 hours battery life.
Widgets, live wallpapers, lock screen ripples and other things that move use battery also. If you don't use it then remove it to save a couple percent a day.
Remember that when charging through a computer USB port or things like that charge a lot slower than an outlet. Slow charging is better than fast charging because your battery stays cooler and that means your batteries total life will be longer.
Finally before you go in a ROM thread and start complaining about battery life, go at least three charge cycles after flashing to optimize your battery.
There are many things that cause battery drain so beware when you download that next app. It could be a battery sucker. If you don't need or don't use an app. Uninstall it because it may have background processes that are using up battery and RAM.
This is a link to read about charging and discharging li-ion batteries.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Thank x10forevers for this great piece of literature. :thumbup:
Here is a link to how Att suggests you save battery!:thumbup:
http://insider.att.com/articles/kee...ExtndSource=1012_ipnp_nat_i_btry#.UJJiM6O3PFo
PM me if you have further questions or something for me to add to this OP.
Happy flashing everyone!!!
Sent from my SGH-I747 using xda premium

nice post! stock users will appreciate it

Hopefully this thread will help reduce the clutter of useless battery life shots in ROM threads. Good looking out!
Sent from my AOKP powered Samsung Galaxy S III

t3chn0s1s said:
Hopefully this thread will help reduce the clutter of useless battery life shots in ROM threads. Good looking out!
Sent from my AOKP powered Samsung Galaxy S III
Click to expand...
Click to collapse
Hit the thanks button. I want to see a list of everyone that actually uses this on the thanks area in my OP. And I'm glad you think this will help. I hope so.:thumbup:
Sent from my SGH-I747 using xda premium

flammingcamel said:
Hit the thanks button. I want to see a list of everyone that actually uses this on the thanks area in my OP. And I'm glad you think this will help. I hope so.:thumbup:
Sent from my SGH-I747 using xda premium
Click to expand...
Click to collapse
Done. My bad for neglecting to initially.
Sent from my AOKP powered Samsung Galaxy S III

Thanks. New to the s3
The other thing I might add is the "wake up phrase" where ever that is. I found it yesterday and turned it off. Helped a lot.

I think this is pretty good, what do you all think?
sent from TGFY aokp.
Fixing battery drain on your s3

rthomas10 said:
The other thing I might add is the "wake up phrase" where ever that is. I found it yesterday and turned it off. Helped a lot.
Click to expand...
Click to collapse
PM me about the "wake up phrase" haven't heard of it. Or just explain it here. I'll add it to the OP
Edit: I found it it's a touchwiz feature.
sent from TGFY aokp.
Fixing battery drain on your s3

Whats better for battery than the native Facebook ? Maybe turning off notifications will help
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Sidneymac said:
Whats better for battery than the native Facebook ? Maybe turning off notifications will help
Sent from my SGH-I747 using xda premium
Click to expand...
Click to collapse
You can uninstall the facebook app, go to facebook on your browser, create a bookmark, and then place a widget on your homescreen for that bookmark. The site is actually faster than the app.

In my opinion maximizing battery life is all about watching out for the things on your phone that you don't care much about but are using a lot of battery life versus keeping the features you like that make your phone a smart phone.
I leave GPS on all the time, use auto brightness, have fb and fb messenger installed, use Google talk all the time, push my work email, etc. and accept the fact that this will cost me about 2% per hour when my phone is idle. I'm also using the latest ktoonsez kernel & task/kt jellybean rom and those help tremendously on battery life (1h45m since unplugging today, 51m of screen time and I'm at 89%). I have definitely been diligent about turning off the things I don't care about, like latitude, location in Facebook, rom weather, etc. and that helps quite a bit. My biggest problem has been maps running for no reason and draining lots of battery, but that sends to be a lot better with the latest rom and kernel.
Sent from my SGH-I747 using Tapatalk 2

Normal every day use going to school, bars and sleeping at nights etc lol
AOKP 10/16 + kt747 10/16
Sent from my SGH-I747

reflectingod96 said:
Normal every day use going to school, bars and sleeping at nights etc lol
AOKP 10/16 + kt747 10/16
Sent from my SGH-I747
Click to expand...
Click to collapse
That's pretty damn good I would say.
sent from TGFY aokp.
Fixing battery drain on your s3

Loving this s3. Last phone I had that had a battery this good was my lg xenon.
sent from TGFY aokp.
Fixing battery drain on your s3

Anyone know how to fix 1013 wakelock. Tried scanning and repairing damaged mp3s and converted my m4a files, but still have quite a bit of drain. Any help would be appreciated.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

QUOTE=guilhermebride;32470926]I know this topic is a little old, but I think someone else might find this information interesting:
software.intel.com/en-us/blogs/2012/03/30/battery-life-on-android-what-can-you-do
ii.Mediaserver. This system process is tricky when it comes to battery. What happens is that whenever you access any sort of media on your external SD card (playing music, gallery, what have you), this process kicks off. Luckily though (but hard to catch), sometimes, this process uses more process time than it should due to corrupted contents on your external SD card. In order to catch this culprit: try clearing your battery stats (for example, restarting your device or coming off AC power), playing some music and/or checking out pictures on your SD card for a few hours. Then, check your processes. If Mediaserver is high up there in usage, you may want to consider cleaning up your SD card. Naturally, we would expect that the process is higher when media contents are in use. I can’t give you a specific guideline such as, "something is up if Mediaserver consumes over 25% battery." This is another example of where you should look up other user stats for system processes based on your specific phone and OS version. If you think your SD card may be corrupted, backup your data, format the device, and slowly, add back files and repeating your media tests. Finding a corrupted file isn’t a guarantee, but this doesn’t hurt if you suspect data corruption.​[/QUOTE]
sent from TGFY aokp.
Fixing battery drain on your s3
sent from TGFY aokp.
Fixing battery drain on your s3

JusFig said:
Anyone know how to fix 1013 wakelock. Tried scanning and repairing damaged mp3s and converted my m4a files, but still have quite a bit of drain. Any help would be appreciated.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
See this ^
sent from TGFY aokp.
Fixing battery drain on your s3

flammingcamel said:
Loving this s3. Last phone I had that had a battery this good was my lg xenon.
sent from TGFY aokp.
Fixing battery drain on your s3
Click to expand...
Click to collapse
what the hell howd you get it that good? I use aokp too and I am getting maybe 2 hours of screen time and maybe 17 hours ish?

enomi said:
what the hell howd you get it that good? I use aokp too and I am getting maybe 2 hours of screen time and maybe 17 hours ish?
Click to expand...
Click to collapse
Turn off GPS when not in need. Turn off WiFi when not near wifi. All the stuff in the op. And undervolted by 100+ mv on every CPU setting. And my phone is absolutely lag free accept when I hit the unlock button it takes like half a second for the screen to come on instead of instantly (160mv undervolted on 192 which is sleep speed I set)
sent from TGFY aokp.
Fixing battery drain on your s3

cloudyphiz said:
In my opinion maximizing battery life is all about watching out for the things on your phone that you don't care much about but are using a lot of battery life versus keeping the features you like that make your phone a smart phone.
I leave GPS on all the time, use auto brightness, have fb and fb messenger installed, use Google talk all the time, push my work email, etc. and accept the fact that this will cost me about 2% per hour when my phone is idle. I'm also using the latest ktoonsez kernel & task/kt jellybean rom and those help tremendously on battery life (1h45m since unplugging today, 51m of screen time and I'm at 89%). I have definitely been diligent about turning off the things I don't care about, like latitude, location in Facebook, rom weather, etc. and that helps quite a bit. My biggest problem has been maps running for no reason and draining lots of battery, but that sends to be a lot better with the latest rom and kernel.
Sent from my SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
Maps is known for that. If you don't mind my asking what do you use maps for and could you just use Google now to search locations and it will even give you traffic n stuff. That would probably get you another hour or so a day.
sent from TGFY aokp.
Fixing battery drain on your s3

Upgraded to Jellybean heavy battery drain help!!!

Hi i upgraded yesterday to Jellybean but it seems am having a heavy battery drain..any one experiencing this problem? Any solution on this? Thank you in advance.
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Mangtas_666 said:
Hi i upgraded yesterday to Jellybean but it seems am having a heavy battery drain..any one experiencing this problem? Any solution on this? Thank you in advance.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
The OS isn't always the reason for battery drain, many factors take into play.
How often you use the device.
Applications like widgets, email push.
Wi-Fi. If your not on it shut it down it else is always going to try to find a signal and drain battery.
Bluetooth. same with this.
Using the net.
Things like Google now, it's always running and trying to update info, shut it off of make intervals longer.
These are just some things to take into account, but at all use the phone different, and im not saying the OS doesn't drain but it solely isn't the only reason.
Hope this help.
Sent from my SGH-I747 using Tapatalk 2

I seem to be having the same problem. ..

Same here. With sync turned off, google now turned off, and most everything else that eats battery...
In the battery setting is shows that media is eating at least 25% battery.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

I'm having the same issue. I read that the media drain could be caused by bad media files, but I didn't have any issues before this weird.

In my experience when you first update to a new samsung rom, the media using the battery is your phone updating the picasa albums...which stinks because it also eats your data like crazy if you are not on wifi and forget to turn off sync until wifi is available.

I've noticed faster than normal battery drain as well on my device. Normally by 4:30pm I'd be at 40-50%. Now I'm in the 20-30% range.
I'm going to try factory defaulting it soon and run it for a day or two. OR I might not even do that and just go directly to Task's AOKP or CM10.

Tony_YYZ said:
I've noticed faster than normal battery drain as well on my device. Normally by 4:30pm I'd be at 40-50%. Now I'm in the 20-30% range.
I'm going to try factory defaulting it soon and run it for a day or two. OR I might not even do that and just go directly to Task's AOKP or CM10.
Click to expand...
Click to collapse
I am going to flash to tasks tonight, not fond of what I've been reading about cm10.
But guys remember we all use our phones differently, take into account apps, usage, ect
Some days my battery lasts a bit longer than normal but I want using it as much.
Sent from my SGH-I747 using Tapatalk 2

i dont have any issues with battery drain, but i would suggest a full restore after upgrade. dont restore using titanium, just install through playstore. then report back but i doubt it will be an issue

Before everyone jumps ship, may want to try a new kernel. KT and a few others should work on the new release. Just make sure you choose one that works on JB TW and not ASOP.

pinoymutt said:
Before everyone jumps ship, may want to try a new kernel. KT and a few others should work on the new release. Just make sure you choose one that works on JB TW and not ASOP.
Click to expand...
Click to collapse
I'm currently a kt kernel for jb twz.. but I'm not really complaining about my bat as I use my phone like a cheap hooker lol
Sent from my SGH-I747 using Tapatalk 2

I have the same problem.. After JB update there is huge battery drain. With average usage it drains almost 100%. Before update with heavy usage I was going through the day.
Maybe I should try KT kernel I don't know. I wiped all after updated, nothing saved from ICS.

CheateR92 said:
I have the same problem.. After JB update there is huge battery drain. With average usage it drains almost 100%. Before update with heavy usage I was going through the day.
Maybe I should try KT kernel I don't know. I wiped all after updated, nothing saved from ICS.
Click to expand...
Click to collapse
Try kt kernel and change the governors to suit your usage
Sent from my SGH-I747 using Tapatalk 2

Same here,
It's seem the culprit is the android.process.media.
Each time i bootup,android.process.media is running for about 30 min, non-stop.
I already do a factory reset+sd formatting, but no succes.
With startup manager, i can block that process,but you need to be rooted .

I use the same settings as before i did'nt upgrade yet..i got it fully charge with no texting and calls the next 1hr its already 80%..i think i would try to cycle first my battery for 2 more days..then i'll see if it still have heavy drains..thanks for the response guyss.

Check out my overnight drian! from 1:30 to 10 the average drain is around 4% an hour, Losing about 20% overnight doing nothing.

Captainjman2 said:
Check out my overnight drian! from 1:30 to 10 the average drain is around 4% an hour, Losing about 20% overnight doing nothing.
Click to expand...
Click to collapse
I just got this phone the other day and immediately updated to jelly bean.Though I have nothing to compare it to my battery drain seems normal. I'm losing about 5% an hour but that is with some use (it's new so I'm playing with it a lot).
I did notice more drain the first day of use (may have been because I was using it a lot) and noticed maps was taking up quite a bit of the battery and I wasn't using it. So I uninstalled the updates for Maps and then re installed it. Battery drain seemed much better after that and now the maps app doesn't even show up in the battery report(before it was about 3rd and it seems kinda high on yours as well though you may be using it).

i'm noticing about the same battery consumption as the stock ICS rom. about 1~2% per hour when idle and sitting, 2~5% per hour listening to music over bluetooth with the screen off, and 5~10% per hour surfing the net and watching videos and stuff.

Well after doing probably 5 resets on my phone , it seems like everything is working fine . I was having issues with the battery drain ,internet not connecting, and phone calls taking 2 minutes to connect.

I was having issues with high battery usage as well after updating to JB.
I froze most every app and widget associated with AT&T and Samsung (with the exception of AllShare) and flashed KT747 kernel and set governor to ktoonservative (default settings).
I am really never a heavy user during the day, but with the same usage I had on ICS, I average 15.5 hours (with the phone at approx 15% when I shut it off to charge) - screen on time between 2.5 and 3 hours; call time between 45 min and 1.5 hrs; media (which seems to be a big battery hog) only about 6 minutes. I use bluetooth exclusively, so that radio is on all the time the phone is on. I keep sync and background data on, but only turn mobile data on as needed.

[Q] Battery Drain Issue

I am trying to troubleshoot my battery drain issue so I have been inserting a fully charged battery into my Note 2 just before bed.
Stock 4.1.2 ROM
Rooted
Night 1
Before bed: 100% battery, airplane mode
Wake up 7.5 hours later: 100% battery life
Night 2
Before bed: 100% battery, WiFi connected, background sync enabled
Wake up 7.6 hours later: 54% battery life
I have Greenify and BetterBatteryStats and still can't figure out what is sucking down the power.
Sync Interval:
Twitter: 4 hour
Facebook: 30 min
Touchdown HD: Push (exchange)
Reddit News: 12 hours
Any help would be appreciated!

I think you really have nearly answered your own question - it's the syncing that's killing your battery. FB is notoriously bad at draining a battery all on its own and the others may be bad too. The dead giveaway is the phone isn't deep sleeping anymore with sync on. Keep up your experiments but freeze each app/process in turn to see how bad each one is and you'll find out. No need to leave it over night - an hour or two should be plenty to find out. In fact, if you have your phone set for max battery life, it should go into deep sleep within minutes of locking it. Personally I only sync manually and that's including email - but I'm not too plugged in so I don't mind checking a couple times a day manually. It does mean killer battery life though! Really any process that is constantly waking up your phone will do the same thing as fb - Google Now with location history on is another bad one.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

This ^^^^^^here is pretty much correct!!
Hate to say but you should just get rid of facecrook. Lol:what:
If you have to use it on the web...
I don't use it..
Me 2¢®
Sent from my SAMSUNG-SGH-I317 using Tapatalk 4

I use fb and I get no battery drain from it

Still unsure about which app is the main culprit. Facebook seems like it could be the biggest problem. Attached is my dump from BBS (BetterBatteryStats) I tried the same thing as the night before except I did the following
Facebook Sync: Never
Twitter Sync: Never
Touchdown HD: Push (exchange)
Reddit News: 12 hours
Night 3:
100% battery before bed, background sync enabled.
52% Battery by wake up.
NOTE: 10076 (Wifi) (com.android.vending.Google Play Store): 86.0 MBytes 95.3% was my apps updating just after boot.After all apps were done updating, I put the phone to sleep until morning.
Things I am going trying.
Freeze Samsung Push
Freeze ChatOn
Greenify Facebook

You need to understand that virtually any app that has the ability to poll your phone and push updates to it automatically without you visibly seeing it is going to drain your battery. This includes:
1. GPS
2. Having your data on in general (networks push packets to each other to stay within protocols regardless)
3. Google Accounts (syncs your calender, contacts, people, etc.)
4. Google Now
5. Mail
etc, etc.

I know this is a little off subject but will face book still drain Battery even if you have location off and sync off?

Facebook Messenger was an issue. It kept waking up my device. I have been doing some testing though and have had almost no luck until tonight.
I disabled WiFi before bed with 100% battery. 7 hours later, 91% battery.
I need to find which apps are using WiFi so heavily.

Go grab greenify from play store

twanskys204 said:
Go grab greenify from play store
Click to expand...
Click to collapse
I have been using Greenify the whole time. Currently, it looks like when on WiFi apps are going crazy with connecting and waking up the phone. On Mobile, I got much better battery life.

Try backing up all ur data on internal and SD card.. Then do a complete fresh install.

Fluffywings said:
I have been using Greenify the whole time. Currently, it looks like when on WiFi apps are going crazy with connecting and waking up the phone. On Mobile, I got much better battery life.
Click to expand...
Click to collapse
Yes. I have the same experience. When WiFi is on, the battery life is much worse.

twanskys204 said:
Try backing up all ur data on internal and SD card.. Then do a complete fresh install.
Click to expand...
Click to collapse
+1:thumbup:
fookxixi said:
Yes. I have the same experience. When WiFi is on, the battery life is much worse.
Click to expand...
Click to collapse
Ok Wi-Fi being on won't kill your battery. Maybe you need to set your to, keep Wi-Fi on during sleep= NEVER. That'll help your battey life some what..
Sent from my SAMSUNG-SGH-I317 using Tapatalk 4

Battery Drain

Ever since I updated to 8.1.0 with December security patch, I've noticed my battery draining faster than normal. I was getting 4-5 hours of SOT with around 45-50% battery left. This was after being off the charger for 12-16 hours. Now I'm getting about half the SOT at similar numbers. Anyone have any ideas?
Sent from my Nexus 6 using Tapatalk

andrewjt19 said:
Ever since I updated to 8.1.0 with December security patch, I've noticed my battery draining faster than normal. I was getting 4-5 hours of SOT with around 45-50% battery left. This was after being off the charger for 12-16 hours. Now I'm getting about half the SOT at similar numbers. Anyone have any ideas?
Click to expand...
Click to collapse
Excuse my stating the obvious, but you need to find what process or app is using the battery. You should be able to get a rough idea just using the new features under Settings>>Battery. It will identify which apps are using the most juice. Run the phone in Safe Mode to see if your battery life goes back to normal. It could also be a service like Google Play Service which sometimes wigs out and starts chewing battery. Are you rooted? If you need more detailed information there are battery drain apps available to help isolate the problem (BBS and GSam). These apps require root to give the best results.

v12xke said:
Excuse my stating the obvious, but you need to find what process or app is using the battery. You should be able to get a rough idea just using the new features under Settings>>Battery. It will identify which apps are using the most juice. Run the phone in Safe Mode to see if your battery life goes back to normal. It could also be a service like Google Play Service which sometimes wigs out and starts chewing battery. Are you rooted? If you need more detailed information there are battery drain apps available to help isolate the problem (BBS and GSam). These apps require root to give the best results.
Click to expand...
Click to collapse
Not rooted and currently locked. I've downloaded GSAM and have adb permissions and it simply says things like Chrome, RCS Phone and Play services. If you see from the photos below you can see what I'm talking about. Chrome currently isn't that bad, but yesterday and the past couple days it's been like 9% or more of the battery.
https://photos.app.goo.gl/hFvQKO7q3pZTHFNb2
Sorry the screenshots were too large for uploading.
Sent from my Nexus 6 using Tapatalk

andrewjt19 said:
Not rooted and currently locked. I've downloaded GSAM and have adb permissions and it simply says things like Chrome, RCS Phone and Play services. If you see from the photos below you can see what I'm talking about. Chrome currently isn't that bad, but yesterday and the past couple days it's been like 9% or more of the battery.
Click to expand...
Click to collapse
Two things: I've never seen phone or kernel use that much battery. On one page phone usage is 33 seconds, yet it used 9% ? I think RCS is running the background all the time. See if you can toggle it to not run in the background under Settings>>Apps>. High kernel I'm guessing is a kernel wakelock or multiple. You've probably loaded app(s) that are creating the problem, but you need to find out which one is causing the wakelocks. There is a wakelock detector "lite" app that doesn't need root but I don't know how well it works. I know the root version works well. Lastly, on the first screenshot with the battery, scroll to the bottom of the page and see which apps are listed there. I'd be willing to bet if you ran the phone in Safe Mode, your battery drain would disappear, meaning your user apps are causing it.

v12xke said:
Two things: I've never seen phone or kernel use that much battery. On one page phone usage is 33 seconds, yet it used 9% ? I think RCS is running the background all the time. See if you can toggle it to not run in the background under Settings>>Apps>. High kernel I'm guessing is a kernel wakelock or multiple. You've probably loaded app(s) that are creating the problem, but you need to find out which one is causing the wakelocks. There is a wakelock detector "lite" app that doesn't need root but I don't know how well it works. I know the root version works well. Lastly, on the first screenshot with the battery, scroll to the bottom of the page and see which apps are listed there. I'd be willing to bet if you ran the phone in Safe Mode, your battery drain would disappear, meaning your user apps are causing it.
Click to expand...
Click to collapse
https://photos.app.goo.gl/4v8seKwMJnceaVUG3
Well in safe mode my drain is gone so I'm not sure which app is doing it, but to directly answer your question about the RCS it is an overall app meaning it is related to several Google play services. I'll upload a photo of it. I have to reboot into normal mode.
Edit: I'm wrong about that it was the play services.. I'll have to start uninstalling the apps to determine which one is draining the battery I guess.

andrewjt19 said:
https://photos.app.goo.gl/4v8seKwMJnceaVUG3
Well in safe mode my drain is gone so I'm not sure which app is doing it, but to directly answer your question about the RCS it is an overall app meaning it is related to several Google play services. I'll upload a photo of it. I have to reboot into normal mode.
Edit: I'm wrong about that it was the play services.. I'll have to start uninstalling the apps to determine which one is draining the battery I guess.
Click to expand...
Click to collapse
RCS can be a real battery hog, but I don't know why. I don't have RCS on AT&T. Do you use Messages as your primary SMS? Open Settings>>Advanced and see if you can toggle off "Enhanced Features". Open properties and check if it is using battery optimization. If it is not, set Messages to battery optimization. You can always turn these back on later if the battery drain remains.

My battery life has been restored to pretty much the same as it was with 8.0. I also noticed poor battery life after installing the 8.1 update, even though they changed the way battery life is estimated with this update (supposedly). Something just felt off, but now everything feels great! I am fairly certain what changed is installing the Greenify Magisk module and/or the Google play services doze module (this enables battery optimization on the Google play services app). Not sure which one really made the difference because I installed them at the same time. However, there is definitely a major difference!!

js042507 said:
My battery life has been restored to pretty much the same as it was with 8.0. I also noticed poor battery life after installing the 8.1 update, even though they changed the way battery life is estimated with this update (supposedly). Something just felt off, but now everything feels great! I am fairly certain what changed is installing the Greenify Magisk module and/or the Google play services doze module (this enables battery optimization on the Google play services app). Not sure which one really made the difference because I installed them at the same time. However, there is definitely a major difference!!
Click to expand...
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Here's proof!!

js042507 said:
Here's proof!!
Click to expand...
Click to collapse
In my experience that's really good.
Before 8.1 I noticed about 11% per hour during screen on use and about 0.33% per hour while on stand by in my pocket or a little bit better if it's just sitting on my night stand not moving while I'm sleeping (I think doze is more extreme in that situation) which seems to match what you are getting. Based on that screen shot I think that's like 8 hours screen on time over like 35 hours for a full charge. I've done a little bit better but not much. That's excellent battery life.
Since 8.1 it has dropped. Best now is maybe 7 to MAYBE 7.5 hours over maybe 26-28 hours. In my experience battery life always drops after an update but this case is far from the worst. I remember when my Nexus 5 updated from KitKat to Lollipop. The battery drop was awful and to make matters worse the battery life of the Nexus 5 was pretty bad to begin with.

js042507 said:
Here's proof!!
Click to expand...
Click to collapse
Which font is that?

MarwanTamer said:
Which font is that?
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Default. I didn't change the system font.

js042507 said:
Here's proof!!
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Click to collapse
What are your settings for Greenify
Sent from my Google Pixel 2 XL using XDA Labs

Prattham said:
What are your settings for Greenify
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Here...

So in my last reply I thought I was wrong about RCS Phone app being a conglomerate of several apps in the phone. For some reason I couldn't find the information I needed at that time. I wiped my phone and started over after posting this thread. I was trying to isolate the misbehaving app. I thought it might have been greenify actually, but no the drain has returned to a lesser extent though. Here's some photos of this RCS app from GSAM.
https://photos.app.goo.gl/rvw077mBfNULbsRE3
I'm not sure what is causing the drain at this point. I've installed Better Battery Stats to locate the wakelocks so I can ignore them through ADB.
Sent from my Nexus 6 using Tapatalk

andrewjt19 said:
So in my last reply I thought I was wrong about RCS Phone app being a conglomerate of several apps in the phone. For some reason I couldn't find the information I needed at that time. I wiped my phone and started over after posting this thread. I was trying to isolate the misbehaving app. I thought it might have been greenify actually, but no the drain has returned to a lesser extent though. Here's some photos of this RCS app from GSAM.
Click to expand...
Click to collapse
Have you tried disabling RCS ? (Post #6). BBS is good for idle drain, active drain not so much. It's best run overnight without touching the phone for 8 hours or so. Pick the phone up in the morning and create/save a log file as quickly as possible. Post the log to the BBS thread if you need help deciphering.

v12xke said:
Have you tried disabling RCS ? (Post #6). BBS is good for idle drain, active drain not so much. It's best run overnight without touching the phone for 8 hours or so. Pick the phone up in the morning and create/save a log file as quickly as possible. Post the log to the BBS thread if you need help deciphering.
Click to expand...
Click to collapse
I cannot disable it since it is comprised of multiple apps. You can see it in the pics on my last post.
Sent from my Nexus 6 using Tapatalk