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[Q] Battery efficient 21e kernel?

Here is the thing, i'm enjoying the whole end of ghost calls thing BUT since I flashed the 21e ROM, my battery drainage is 'over the roof', i lose almost 20 to 30% in 2 hours of standby, and its been happening with both promethius and bluekernel. I'm on Promethius 1.4+ ROM.
I've deleted system apps, like I've done since ThiaiZ ROMS, which I'm missing now but no significant increase in battery life.
Any thoghts? I'm guessing its not just me, I've seen similar complaints in other topics but no resolution.

Same here, I think that is wi-fi related, since I've changed the wifi sleep policy to "When the screen is off" my battery life is ok....

I think there are a bunch of things that are killing the battery:
- screen brightness / auto brightness (not working properly, no change when less than 50% brightness?? I have mine set to auto but it don't feel right...)
- wifi (definitely a bunch of issues since day 1 of this phone, I leave mine off when screen off too even though its annoying waiting for connection)
- data (i've noticed using apps like 2x battery, or juice defender can help a lot which disables data when screen is off)
- poorly programmed LG integrated software... I freeze as many LG apps as possible in system using Titanium Backup, helps a bit too.
- incorrectly calibrated battery, re-calibrate with CWM. Do a full charge, then reset battery stats in CWM and let the phone fully drain till shut down and then re-charge non-stop to 100% again. Then its properly calibrated.
Hope any of that helps, it seems to have helped me a bit. I can get between 18-30 hours of mixed use, but more to the light/standby side.

vitorcruzbr said:
Here is the thing, i'm enjoying the whole end of ghost calls thing BUT since I flashed the 21e ROM, my battery drainage is 'over the roof', i lose almost 20 to 30% in 2 hours of standby, and its been happening with both promethius and bluekernel. I'm on Promethius 1.4+ ROM.
I've deleted system apps, like I've done since ThiaiZ ROMS, which I'm missing now but no significant increase in battery life.
Any thoghts? I'm guessing its not just me, I've seen similar complaints in other topics but no resolution.
Click to expand...
Click to collapse
Actually the 21E stock ROM/kernel has better battery life than any previous GB or Froyo stock ROM, like many people have already reported here. I'm loosing only 1-2% overnight on standby, so if you lose 20 to 30% in just 2 hours of standby, then the problem is not the 21E but something else.
The best way to check is the problem is related to the stock or custom 21E ROM/kernel, is to go back to the stock 21E. If this is too time consuming, you could follow the recommendations of crazycage, or check/disable any apps that cause battery drain (like, turn off background sync or apps that connect periodically to the net, like mail, news feeds etc)

Thanks guys, but the drainage happens even after these steps, with this phone I have became used to doing all these steps after flashing a new rom, i delete or freeze most of the system apps, i only activate wifi when i use it and background data is off almost all the time.
The only thing I'm used to that is not good for battery is keeping the brightness at maximum, but on older roms battery life was ok, I could get It through the day with no major issues.
Do anybody have the stock 21e kernel in a flashable package? 'Cause in the past two weeks I have flashed and reflashed it over and over to get it to work and flashing it again would really be a pain in the a.

vitorcruzbr said:
Thanks guys, but the drainage happens even after these steps, with this phone I have became used to doing all these steps after flashing a new rom, i delete or freeze most of the system apps, i only activate wifi when i use it and background data is off almost all the time.
The only thing I'm used to that is not good for battery is keeping the brightness at maximum, but on older roms battery life was ok, I could get It through the day with no major issues.
Do anybody have the stock 21e kernel in a flashable package? 'Cause in the past two weeks I have flashed and reflashed it over and over to get it to work and flashing it again would really be a pain in the a.
Click to expand...
Click to collapse
your battery may not be holding a charge I have heard of others that had bad battery
sent from my acidhazard thrill

wayno140 said:
your battery may not be holding a charge I have heard of others that had bad battery
sent from my acidhazard thrill
Click to expand...
Click to collapse
But it was ok before 21e

vitorcruzbr said:
Thanks guys, but the drainage happens even after these steps, with this phone I have became used to doing all these steps after flashing a new rom, i delete or freeze most of the system apps, i only activate wifi when i use it and background data is off almost all the time.
The only thing I'm used to that is not good for battery is keeping the brightness at maximum, but on older roms battery life was ok, I could get It through the day with no major issues.
Do anybody have the stock 21e kernel in a flashable package? 'Cause in the past two weeks I have flashed and reflashed it over and over to get it to work and flashing it again would really be a pain in the a.
Click to expand...
Click to collapse
You mean that you've re-flashed a clean stock 21E ROM/kernel and still have battery drainage without deleting/freezing apps or installing new ones? That's strange because most people actually report better battery life with the 21E than any previous ROMs.
If you think that it's not a faulty battery like wayno140 suggested, you could go back to an older GB ROM to have a test.

No, only did first boot on stock 21e, and flashed Promethius, deleted system apps and did all the battery-friendly steps but still no improvement

hello everybody! lest talk about battery

well,, its been a long time time i dont walk trough xda but first i wanna say HELLO to everybody here and i wanted to say that i love this phone, I SIMPLY LOVE IT, fast and smooth, the way everybody wants a phone BUT i have been experimenting problems with the battery...
i used to have my phone unpluged from a full charge at 7 AM and discharged to 20 % at 8 PM, now since i rooted my device, battery is suffering i high drain since it cant survive even 6 hours of good use
any way, in case you can give me a hand im going to give you some informaction to help you help me:
MODEL: D800 atyt
SOFTWARE: 4.4.2 20c
KERNEL: 3.4.0
ROOTED with TWR, almost all bloatware deleted, xposed installed and running with G2 xposed module, battery doctor and clean master running.
*its shows that screen is using most of the battery but its imposible since im using low brightness and 30 secs to turnd off screen
SO THEN, WHAT SHOULD I DO? FULL WIPE FROM RECOVERY. and then apps restore with root apps? DELETE SOMETHING? APP INSTALATION?
anyway, i wanna know, what about you? tips? help for battery life? AANY KIND OF HELP WILL BE THANKS FULL :good:

I'll do a clean installation using this ROM http://forum.xda-developers.com/showthread.php?t=2483043 it's basically stock but he removed all bloatware. With android phones, it is suggested to do a clean wipe every 6 months or 1 year.

leroy_coco said:
well,, its been a long time time i dont walk trough xda but first i wanna say HELLO to everybody here and i wanted to say that i love this phone, I SIMPLY LOVE IT, fast and smooth, the way everybody wants a phone BUT i have been experimenting problems with the battery...
i used to have my phone unpluged from a full charge at 7 AM and discharged to 20 % at 8 PM, now since i rooted my device, battery is suffering i high drain since it cant survive even 6 hours of good use
any way, in case you can give me a hand im going to give you some informaction to help you help me:
MODEL: D800 atyt
SOFTWARE: 4.4.2 20c
KERNEL: 3.4.0
ROOTED with TWR, almost all bloatware deleted, xposed installed and running with G2 xposed module, battery doctor and clean master running.
*its shows that screen is using most of the battery but its imposible since im using low brightness and 30 secs to turnd off screen
SO THEN, WHAT SHOULD I DO? FULL WIPE FROM RECOVERY. and then apps restore with root apps? DELETE SOMETHING? APP INSTALATION?
anyway, i wanna know, what about you? tips? help for battery life? AANY KIND OF HELP WILL BE THANKS FULL :good:
Click to expand...
Click to collapse
Very similar here, except I don't have battery doctor or clean master. My battery life sucks. I have disabled CIQ and Google Now. I installed WakeLock Detector and I am charging to 100% tonight, unplugging it, and will check in the morning to see whats going on.

paulthuong said:
I'll do a clean installation using this ROM http://forum.xda-developers.com/showthread.php?t=2483043 it's basically stock but he removed all bloatware. With android phones, it is suggested to do a clean wipe every 6 months or 1 year.
Click to expand...
Click to collapse
Is there a difference between clean wipe and full wipe??

So I did the following:
Stopped cIQ with "Disable Service".
Disabled Google Now
Stop location services
Set brightness to 60% Auto
Charged to 100%, reset (with the charger on), then removed the charger.
Now, I am sitting at 17.5 hours on battery with 4 hours expected time left, and 2 hours screen time. Definite improvement.

not sure about the clean and full wipe but I wouldn't do a factory reset on the phone because your system files might be broken already. Just download the ROM zip file from the internet and go to Recovery to do it.

Custom ROM battery drain

Hello!
Does any of you have an idea why do I have a huge battery drain on custom roms?
I have tried nearly all of them (all based on OpenKirin), and no matter what I do I cannot get more then 1,5 - 2 hours of SOT, and I have to charge my phone daily. With EMUI I only charged my phone in every 2 days, with 3-4 hours of SOT.
Here's what I've tried:
- Installed L Speed, set it to Battery profile
- Installed HEBF instead of L Speed, set it to medium battery saving
- Installed Kernel Adiutor, set the CPU governor to Blue_active or Darkness, set I/O scheduler to zen or bfq (with whitePug kernel)
- Installed Greenify, set all apps that I don't want to keep running to it
- Installed Titanium Backup, I froze some system apps I don't need
- I checked WakeLock Detector, but I didn't find anything bad, my phone was 3% awake, the rest in deep sleep
- I installed BetterBattery Stats, no result
Still in 7 hours overnight from 100% my battery drained to 93%. In 9 hours with minimal usage and approx. 10 minutes SOT I'm at 82%.
I couldn't find solution to this, this is the case in ALL roms...
Can anybody help?

Rommco05 said:
Thats is realy bad and big battery drain. If you goes now back to emui, battery life is the same like last time on emui? I mean if isn't something corrupted in phone after flashing custom roms
edit: I think you try to do factory reset
edit1: You always use only one optimizer? Becasue if u use this can make some errors between two optimizers if work two together
edit2: You try just flash custom rom without any change in setting and any optimizer and, battery drain is still huge?
edit3: this I think don't help but can have a look https://forum.xda-developers.com/honor-8/how-to/guide-battery-life-nougat-t3623980
Click to expand...
Click to collapse
I have used LSpeed + Kernel Adiutor OR HEBF + Kernel Adiutor OR Lspeed only OR HEBF only. I didn't mix them. I tried with and without Greenify as well. I've already went back EMUI once for the same reason, battery life is great there, no issues.

Have you tried going back to the EMUI and check if everything is fine? It could even be your battery that is damaged because of over heat or using 3rd party charger.

Rommco05 said:
So good message is phone isn't broken. You always download latest version of custom rom? Try just once clean installation, wait what is your model of phone FRD...?
edit: You have network and wifi signal good/strong?
Click to expand...
Click to collapse
FRD-L09
Wifi always nearly full (with EMUI it's always full), network signal nearly always full.
I've tried clean install many time. Currently I'm on OwnROM. I've flashed the WhitePug kernel in the morning after the 7% drain with stock kernel.
Here're some screenshots:
https://goo.gl/photos/nt78xiGEdjqG5bLX8

Saeem said:
Have you tried going back to the EMUI and check if everything is fine? It could even be your battery that is damaged because of over heat or using 3rd party charger.
Click to expand...
Click to collapse
As I mentioned above your comment, on EMUI everything is good.
On custom roms the phone isn't overheating, and I use stock charger.

Mine good i got about 5-6+ SOT

csakesz55 said:
As I mentioned above your comment, on EMUI everything is good.
On custom roms the phone isn't overheating, and I use stock charger.
Click to expand...
Click to collapse
Yeah get it. But I'm saying have you tried the EMUI once again after having this issue?

Here some ss

Saeem said:
Yeah get it. But I'm saying have you tried the EMUI once again after having this issue?
Click to expand...
Click to collapse
I had this issue ever since I tried custom roms. This is the reason I went back to EMUI before. It's good there.

Rommco05 said:
You goes from latest firmware to custom ROMs?
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Click to collapse
Yes. From B389.
First I flashed RROS latest full. Then I flashed the other roms.

Rommco05 said:
You use newest version of gapps?
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Click to collapse
Freshly downloaded from opengapps:
"open_gapps-arm64-7.1-mini-20170801.zip"

Rommco05 said:
I don't have more ideas, just last. Try flash Linaegeos > without gapps > and without simcard or try to change > install just HEBF or LSpeed and if still without progress (I don't know how improved your battery life, but I tried )
Click to expand...
Click to collapse
Thanks! I've just flashed OwnROM again with Dalvik, Cache, Data and System wipe. I flashed gapps and I installed nothing else. I charge my phone to 100% and I let it be on the desk till the afternoon. We'll see. If it's good, maybe some installed app causes the issue.
Any of you use Viber? I have Messenger, Telegram and Viber all installed and runnin. They don't show up in the battery consumers though... On EMUI I have no issues with them.

Rommco05 said:
Yes can be related with this apps on custom roms, leave after here results
Click to expand...
Click to collapse
Sure thing! Another question, is that normal that on Custom roms it takes much LESS time to charge the phone to 100%? It takes longer on EMUI, especially after 80% and up.

Well, nothing changed really...
2 hours on battery with 3 min screen on time 2% drop. That's 1% / hour, just as last night.

csakesz55 said:
Well, nothing changed really...
2 hours on battery with 3 min screen on time 2% drop. That's 1% / hour, just as last night.
Click to expand...
Click to collapse
bro use this https://forum.xda-developers.com/honor-8/development/kernel-whitepugkernel-honor-8-t3626554
with kernal auditor (governer -blu_active&Schduler-bfq for battery ) and use lspeed and set the profile to battery :good:

Rommco05 said:
hmm, this can be question for developers I think u everything already try
edit: u try without gapps?
Click to expand...
Click to collapse
Without gapps? no... But I've flashed back EMUI already.

I have observed that Carbon ROM gave me the best battery life. Standby of 1%/hr is still present but it doesn't drain as fast as other ROMs when screen is on.

Anonshe said:
I have observed that Carbon ROM gave me the best battery life. Standby of 1%/hr is still present but it doesn't drain as fast as other ROMs when screen is on.
Click to expand...
Click to collapse
Gopinaidu rom are really good

Insane battery drain despite different roms

I've tried stock 5.2 and different roms. Even in TWRP I find the battery is draining insanely quick. I charged it up to 100% and when I went into TWRP, wiped everything and installed Lineage OS and gapps, it dropped about 5%. At this point I'm not sure if the battery is just basically on its last legs from being on 5.3 for so long. Does anyone have any suggestions? Something else I can try flashing to see if it fixes the insane battery drain? I'm considering just selling the thing off and buying something else, but would want to try and salvage this thing if I can.

AllenR85 said:
I charged it up to 100% and when I went into TWRP, wiped everything and installed Lineage OS and gapps, it dropped about 5%.
Click to expand...
Click to collapse
Flashing a ROM and starting it up (and installing apps) uses a lot of processor power, and therefore a lot of battery. A 5% drop flashing a ROM and starting it the first time would be completely expected. After flashing a new ROM I would recommend you use it for a day or so(drain battery to almost empty) and recharge; to let the ROM "settle in" and the battery meter to calibrate. Do this before passing any judgment on battery.
Severe battery drain has been a consistent issue on all stock Nougat builds. But I can't speak for Lineage, as I only run stock ROM (rooted). But it's an OS issue, not a battery issue. The worst case, if downgrade to Marshmallow, and it should fix the battery drain.

Having trouble with battery life - BIG TIME (Pixen-OS)

Hey,
So I'm a user of that ROM for a while
Recently noticed very very hard battery drain.
Means I can leave my device for a night and it will go down for example from 100% to 65% easy .
I deleted all unnecessary apps , did lots of checkups , even disabled Volte to try and same thing .
Here are some screenshots below of BBS.
Getting sorta like 1.5 hours of SOT .
Please help me

As a pixen user myself, i haven't faced battery issues on the latest builds, hell even overclocking the device i still have solid battery life. I'd recommend a factory reset to see if things clear out. If things don't clear out with a factory reset, reflash the latest builds alongside a factory reset in the process of doing so, If neither of those options work, try updating the oos firmware and reflash pixen on both slots.

Have you ever considered the possibility That your battery is going bad. Cuz even my battery is actually gone quite bad. Have to change it in a few months.

The only way to know is to try to run OOS for a while to compare. If it's also bad, then your battery is bad. BTW, you don't need to make a separate thread for this. This isn't a ROM support page.