[WTF] Custom kernel battery drain, why? - Samsung Galaxy Nexus

Hi everyone,
from 1 month ago i notice very low battery life, my phone is 0% at the afternoon, i always use AK series with Paranoid ( switch sometimes to AOKP,CM and Stock ), Full disk encryption, this is normal, somebody had this problem from 4.2.2, but the strange thing is, this battery drain is high only when using custom kernel ( tried franco, Ak, and Lean), with other kernel i don't have this problem, yesterday i tried with full rom reflash without any custom kernel my battery life. i come back to home at 22:00 ( 10:00PM ) with 20% , same usage like always.
Use always 3G data on, with 50% time on wireless, all sync on , google now off, Apps timeout sync set to 1 hour
I investigate about this thing, i notice for first thing this: custom kernel is too aggressive, new interactive designed for 3.4 series is too aggressive, switch to MAX without any need ( 10-20% load ), but i don't know why battery life is so low anyway...
Franco kernel is more horrible for me, battery went down like 1%/4min ( with some sms and whatsapp )
lean seems more neutral here, but always high battery drain
Here the are some stats from this day testing ( from 100% to 0% ) (*All kernel using stock kernel configuration )
1) Stock kernel
16.44 Hours on battery
02.57 Hours on screen on
2) Ak Kernel
14.08 Hours on battery
01.44 Hours on screen on
3) Franco kernel
07.49 Hours on battery
02.03 Hours on screen on
4) Lean Kernel
18.31 Hours on battery
2.11 Hours on screen on
Anyone else has noticed this strange issue? on custom kernel i always noticed overheating too, this is very strange!

Try ondemandplus, I've had no problems with that.

Unless you just have to have facebook provide notifications on stuff disable the facebook notifications. I did that on my GNex and saw an increase of several hours to my battery life with more screen on time. I've also noticed for some reason that texting seems to drain my battery really quickly and can't seem to find a reason for this.

I know this, disabled notification stuff from day1, but the strange thing is stock kernel has no problem ,46 % with 2 hours battery on stock
Send from Galaxy Nexus with Tapatalk 2

Here is mine today. I'm running stock with Franco Kernel. Everything is syncing except for facebook. I also have about 1:30 hr's of phone calls today.

Related

[Q]Completely wipe phone

Hey, I'm trying to fix my battery drain during light use. Having screen on for not even 5 minutes eats around 2% of my battery. I've calibrated, gone through many different ROMs [GB(CM7,MIUI,Sense) and ICS] with full wipes(format and wipe). leading to my question in hand... how do I completely wipe my phone? I visit the wifi settings and see a wifi history that were from a pretty long time ago(before wipes). This leaves me thinking I have not fully wiped my phone in between flashing. Does the google account save wifi history or something? Thanks for any tips!
My problem still persists any help is appreciated
Sent from my Inspire 4G using XDA
You seem to be wiping your phone correctly. The WiFi settings are backed up under the Google account and are restored when you add the account again. It also backs up other settings, wallpaper, and app data of certain apps. Here's an easy way to fully wipe your phone (including the SD card app files in .android_secure) - http://tinyurl.com/66fc8og
It's called super wipe script and it is from the Android Revolution HD ROM thread, thanks to mike1986.
Sometimes the battery loses it's ability to hold charge after sometime. This happens when the battery is quite old or due to various reasons that I don't know. You'll need to get a new battery then.
On the ROM side, a good ROM+kernel combo gives the best battery life. Instead of using a plethora of apps to save battery, finding the right ROM & kernel combo and choosing a good CPU governor and min-max frequency settings will give you much less battery drain. I don't use any battery saving apps, but I run a great ROM (CM7.2 RC1) with an awesome kernel (LorDModUE 8.9b7), with smartassv2 governor running 122-1152 Mhz and a few build.prop tweaks.
You can try out my combo and see if you're getting any better battery life. The max I've gotten recently is 14 hours of heavy use with 4 hours of screen on time, wifi on for 75% of the time and a lot of web browsing and video watching. I usually keep my phone in 2G mode and only change to 3G when I need to use the internet. 3G drains the battery really fast. On average I get around 13 hours heavy use, 1 day medium use and more than a day of light use (with mobile data off unless when necessary). I get around 1% per hour drain in standby.
You can try this ROM VictoryMod by victoryo. It has my same ROM+kernel combo I've mentioned before + build.prop tweaks. Change the CPU governor to smartassv2 with 122-1152 Mhz frequency. It gives great battery life.
Among the Sense ROMs, Android Revolution HD with klquicksall's kernel and LeeDrOiD HD with LeeDrOiD's kernel give awesome battery life.
Thanks for the reply! I greatly appreciate it. As for my ROM, I've been using the latest LeeDroid, but the battery drain seems to be happening across all the ROMs I've tried recently. I never install battery saving apps, and I keep default kernels and settings. The problem is probably with my battery, I've had this phone since last May, so almost a year. I'll see if I can get this problem sorted out. Thanks again!

Weird battery life

Hi all,
my battery life has gone wild somehow since I went back to Stock rom with Stock kernel (base 4.18.401.2) - I only used ROMCleaner to get rid off apks like facebook, twitter etc. Brightness is stock default and after 36 hours of usage and 04:50:59 hours of screen on I still have 44% of battery left I attach screenshots, but HTC Sense got only 1,8% of battery drain !? I guess I won't reboot this phone anymore ) I have absolutelly no idea what's going on.
And suddenly it drains from 40% to 4% .

[Q] Battery Drain in Custom ROMs

I actually thought a lot and tried 2 custom roms but the battery drain is beyond acceptable. First was the Carbon ROM, I really love the ROM and its features, but I lost about 17% charge while I was asleep. Thats some standby battery drain. Worst of all I even had the phone underclocked and had deep sleep on, still no use. The phone keep draining a lot in standby.
Then I tried CM, but that also gave pretty much the same result, I lost 15% yesterday night. Even with max frequency set to 1.7Ghz and the deep sleep Xposed module installed.
Nothing seems to be going well, do Xposed modules take a lot of toll on your battery life? I usually choose to add Keepchat, Headsup display, Nexus navbar and wifikey modules.
Could it be the Xposed or was it cause the ROMs were 4.4.4?
And if possible I would like to remain on Carbon, but for the battery drain I think i'll have to try some stock based roms or go back to proper stock again. I hope someone using any of the custom roms could help me out with my battery drain issue
Thank you.
I have ds battery saver and i set my own configuration and on stock rom in standby mode my battery drain 1%/h. Try this program and tune cpu to 1 core active in deepsleep and 1h interval in wivh my apps are frozen for 1h my wifi turn off and mobile data for 1h and after that my phone give permission to apps etc for 1minute to synchro etc. At night from 23 to 6 i have set that nothing can synchro everything depend from your settings

Cm 13 And Battery Life

Hi .. Since 2 weeks im using cm13 which a great rom .. i ve grenfy and using it but my battery life is sucks .. ive tried 777 and nubela kernel but both makes my mobile hangs alot .. any way to improve battery life?
Hey Taki, I'm using only Amplify to limit some wakelock, with Greenify I have bad results.
I'm using my G3 really often, almost half of day.
Getting 5-6h screen on time, depending on usage (mostly web, WhatsApp, G+ and Tasker)
I have only this tweaks: stock cm13 kernel with
Interactive governor, up threshold 95, disabled input freq boost. Nothing more
1% per 12h while sleeping.

An app to show idle % per hour battery drain?

Hi, I have a OnePlus 3 with LineageOS, I also used to have the ElementalX kernel on which I enabled the battery monitor and I could see the battery drain percentage/hour in real time, at first it was 1,5%/h idling which is already terrible (for ref i used my schoolmates nexus, which had 0,5%/h and also googled a bit) but then it got worse and worse until it got to 3%/h so I decided to clean flash the rom and leave the stock kernel on... And that has left me with awful OCD about my battery since I can't see the drain in real time anymore (Previously I used the EX Kernel Manager which works only with that kernel)
So I need to know 2 things, does anyone know why my battery drain could have been acting out? And more importantly, please recommend me some apps that can display the idle battery drain in real time...
Thanks in advance.
Ex kernel mangaer works with all kernels. You could use accubattery as well, it does have a similar option too. Idle drain needs to be checked on long runs, for example if you use your phone for texting and turn your screen on/off many times, a battery monitor app could not be that accurate because when it scales the percentage used by screen off it could register the amount of power used by the screen when it was on ( but it wasn't register as screen on because the 1% dropped when the screen was off even if you used that 1% when the screen was on). I hope it's clear enough. English is not my native language and it's hard to explain it.

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