Develop Bugs

[Q] high battery drain on all roms!

Hi! Before i have got a drain of 3-6 mA with most of the roms, but suddenly all roms dain 16-20 mA. No matter if it is MIUI , cm7 or sense roms. They all have the same drain .. is my battery bad ?
Got my phone waterdamaged 2 weeks ago , but this bad battery time started yesterday...

First you need to calibrate the battery.
Charge your phone until Current Widget shows 0mA. Then go into recovery and delete battery stats. Let the phone discharge until it shuts down by itself, then charge until it is back to 0mA. That will calibrate the battery.
Secondly, new ROM's do take a few days to "learn" how to use the battery most efficiently so you wont get the best battery life instantly.

raze599 said:
First you need to calibrate the battery.
Charge your phone until Current Widget shows 0mA. Then go into recovery and delete battery stats. Let the phone discharge until it shuts down by itself, then charge until it is back to 0mA. That will calibrate the battery.
Secondly, new ROM's do take a few days to "learn" how to use the battery most efficiently so you wont get the best battery life instantly.
Click to expand...
Click to collapse
I know that ROM´s need a few days , but i have waited a few days ,and noticed that it is allways the same drain... But i will try calibrate my battery next

And please make sure that during the period of charging it the second time that you do not take it off the charger. That will mess up the calibration and you will have to start all over again.

you might want to try a new radio too

same for me. I tried everything I could.
I tried these roms:
-coredroid
-ARHD
-honey
-virtuous
-MIUI(current)
I tried these methods:
-multiple new recommended radio + ril
-battery calibration app + clear battery stats(recovery) @ 100%.
-full wipe 1.5
-re-root(hack kit v12.3)
-different kernels
When I first rooted my phone battery was perfect on any roms until I flashed ARHD,thats when my battery drainage happened.

P00t said:
same for me. I tried everything I could.
I tried these roms:
-coredroid
-ARHD
-honey
-virtuous
-MIUI(current)
I tried these methods:
-multiple new recommended radio + ril
-battery calibration app + clear battery stats(recovery) @ 100%.
-full wipe 1.5
-re-root(hack kit v12.3)
-different kernels
When I first rooted my phone battery was perfect on any roms until I flashed ARHD,thats when my battery drainage happened.
Click to expand...
Click to collapse
Same here lol. The drainage started after flashing ARHD, witch is the best rom out there .. so dunno how to solve this

shadowraiin said:
Same here lol. The drainage started after flashing ARHD, witch is the best rom out there .. so dunno how to solve this
Click to expand...
Click to collapse
how many hours you are getting now....with regular usage ????

I'm getting the same here... Started with ARDH too, then LeeDroid, now Virtuous.
Clean installs each time, apps restored using Titanium. Also re-flashed the recommended Radios too and calibrated the battery once.
Current drain is 15% / hour on Standby ~70+mA.
I noticed no unusal Wake Locks either.
I'm loving Virtuous, but thinking to go back to stock if the new Viruous update doesn't solve this.
Just whilst typing this I lost 2% :-(

Yeah this is no fun...
Sent from my Desire HD using XDA App

Delete all htc account and calibrate the battery

Battery Problem

Hi Guys,
I have a problem with the battery on my Galaxy W. I use Arco´s JB 4.1.2 kernel 3. If i listen music and play games after 2-3 hours my battery drain from 100% to 0%.
What can i do ?
p.s sry for bad english ...
LG Danny.
http://s7.directupload.net/file/d/3132/mznhos77_png.htm
http://s1.directupload.net/file/d/3132/s5b3j2aq_png.htm

Danny94 said:
Hi Guys,
I have a problem with the battery on my Galaxy W. I use Arco´s JB 4.1.2 kernel 3. If i listen music and play games after 2-3 hours my battery drain from 100% to 0%.
What can i do ?
p.s sry for bad english ...
LG Danny.
http://s7.directupload.net/file/d/3132/mznhos77_png.htm
http://s1.directupload.net/file/d/3132/s5b3j2aq_png.htm
Click to expand...
Click to collapse
I think you should buy a new battery because your battery drains too much. I bought a new battery on amazon and I spent only 20 euros.
Inviato dal mio GT-I8150 con Tapatalk 2

try installing another rom while ur battery is completely full and see if it solves ur problem

try this one first on your emulator,,
su
svc wifi disable
exit
exit
.....

santiagoruel13 said:
try this one first on your emulator,,
su
svc wifi disable
exit
exit
.....
Click to expand...
Click to collapse
Wich emulator ?
Maybe my installation done wrong. Wipe data and cache, should i do what else ? Because i installed many alphas.. and sometimes i don´t have wipe anything.
The Battery is actually new, i don´t think my problem obtain on the Battery.

Hello,
I have problems with baterry too since i flash my phone with Slimbean rom 4.1.2. Since i have this rom my battery goes from 100% to 0 in 6 hours, before i had original rom i had battery for 3 days. So this can't be problem in battery. Anyone know what to do ?

Kriminalc said:
Hello,
I have problems with baterry too since i flash my phone with Slimbean rom 4.1.2. Since i have this rom my battery goes from 100% to 0 in 6 hours, before i had original rom i had battery for 3 days. So this can't be problem in battery. Anyone know what to do ?
Click to expand...
Click to collapse
try to calibrate your battery (did you install rom while your battery wasn't 100 % )
when I did this my battery go wrong but I calibrated my battery and every thing go ok after about 3 cycled charge.

Ahmed.ragab said:
try to calibrate your battery (did you install rom while your battery wasn't 100 % )
when I did this my battery go wrong but I calibrated my battery and every thing go ok after about 3 cycled charge.
Click to expand...
Click to collapse
I celibrated my battery now. At the moment it´s nothing changed. What you mean with 3 cycled charge? Should i charge first when the battery is at 0% ?

again,,, i'm gonna share with you my own experience,,,
i ,, too,, am flashing so many roms,, trying each and every one out there,,,
and so ,, i face a common problem,, dont know if its a board problem or what,,,,
THE WIFI
after i connected my phone to a wifi,, and then,, i switch it off,,,, i noticed that it will then start to reconnect by itself,,.. dont know when ,, or even how,, but its reconnecting itself,,, it continues to scan,,, ... result is that,, when i touch my phone... its really hot,,, and because of that,, im sure my phone isnt going to a deep sleep state.. (correct me if im wrong)
that is when i search the net and found a way to disable a wifi reconnection thru terminal emulator,,,,
and that is by entering this one
su (enter)
svc wifi disable (enter)
exit (enter)
exit (enter)
i usually do that after i use my wifi,,, to ensure that it wont reconnect again,,,
and im just wondering why in CM,, its always reconnecting,, while on gb roms,,, it doesnt....

Ahmed.ragab said:
try to calibrate your battery (did you install rom while your battery wasn't 100 % )
when I did this my battery go wrong but I calibrated my battery and every thing go ok after about 3 cycled charge.
Click to expand...
Click to collapse
I calibrate my battery now. I will se. I Also install CPU SPY from market to see what is happening with deep sleep. So i see there my phone go to deep sleep. i had around 50% battery when i install a new rom. But before i install new rom i was format sd card and wipe all things with cwm i could.

Kriminalc said:
I calibrate my battery now. I will se. I Also install CPU SPY from market to see what is happening with deep sleep. So i see there my phone go to deep sleep. i had around 50% battery when i install a new rom. But before i install new rom i was format sd card and wipe all things with cwm i could.
Click to expand...
Click to collapse
after you calibrated your battery let it drain to 0% and full charge it and use it as usual you will feel that your battery stand more and more
and by time it will be ok again
---------- Post added at 09:48 PM ---------- Previous post was at 09:44 PM ----------
Danny94 said:
I celibrated my battery now. At the moment it´s nothing changed. What you mean with 3 cycled charge? Should i charge first when the battery is at 0% ?
Click to expand...
Click to collapse
I mean by it charge your phone 3 times (let it drain to 0% then full charge it)

Kriminalc said:
I calibrate my battery now. I will se. I Also install CPU SPY from market to see what is happening with deep sleep. So i see there my phone go to deep sleep. i had around 50% battery when i install a new rom. But before i install new rom i was format sd card and wipe all things with cwm i could.
Click to expand...
Click to collapse
Ok, Thanks, ill try Hope it will work

I have no changes after 3 recharges. What can i do else ?

Danny94 said:
I have no changes after 3 recharges. What can i do else ?
Click to expand...
Click to collapse
use another kernel OR install another Rom

I'm going mas with this battery! Now it got a bit "fat" and drains
Pretty quick. Watch the screenshot of today....
Did this happened already to anyone of you?
Sent from my GT-I8150 using xda app-developers app

RickySiMo said:
I'm going mas with this battery! Now it got a bit "fat" and drains
Pretty quick. Watch the screenshot of today....
Did this happened already to anyone of you?
Sent from my GT-I8150 using xda app-developers app
Click to expand...
Click to collapse
Its happened for me, it got fat and drain very fast, and when i connect the to the charger its reach 80% and tell me that its '' full charged '' and when disconnect from charger after 10 min o using phone, the phone turn off and cant turn it on only if connected to charger.
Sent from my GT-I8150 using xda app-developers app

[Q] Battery charging too fast

Hi guys.
I have a strange problem. My Gio charges from 3% to 100% in 3 minutes. It says fully charged...
Of course it's not real charging, if i unplug it, and start to play a game or just see my mails with wifi, it consumes that 100% on 5-10 minutes...
I've tried to charge the phone all night and the result is 2-3h of working time. If i use power consuming apps, like games, than it's just half an hour... I think that the phone stops somehow the charging process if it reaches to 100%.
I've tried to calibrate the battery, with program from market, and wiping batterystats from CWM too... It didn't help...
The strange thing is, that last week it worked well. Now something happened and it's ruinig my life...
I had THIS ROM when it started.
I've changed to THIS ROM, and it didn't solve the problem. All caches were wiped during flashing...
Any ideas?
Thanks for any help!

Anybody? Please...

Kuyte said:
Anybody? Please...
Click to expand...
Click to collapse
Hm you said you tried to calibrate the battery so it`s weird. I have sometimes the same problem but after a calibration it is fixed. I can only recommend to charge it overnight , make sure you`re not overclocking it , make sure you don`t use wifi , mobile data , gps , see if there`s an improvement keep it only with calls and messaging for 1 day see how that goes. Check also the battery maybe it has a spillage altough i don`t think that`s the case. Sorry that`s all i can say

Thanks for the advices.
I've just set the CPU governor to smartassv2. It was on Ondemand. Now I can discharge the phone with playing within 15 minutes. It's better than it was on ondemand...
I will try to use it like a regular phone, let's see how it works...

R: [Q] Battery charging too fast
Also, how old is your battery?
Sent from my GT-S5660 using xda app-developers app

ItachiSama said:
Also, how old is your battery?
Click to expand...
Click to collapse
The phone is 1.5 years old. On the battery the date is: 2011/07/26

Flash a stock rom with odin if doesn't solve the issues buy a new battery maybe your's dead.
Sent from my GT-S5660 using xda app-developers app

also remove any apps or games you have installed since you encountered this problem, I have tried enhanced rom it gives a stable battery life, but its worth changing to a different rom like cm 7.2 by phiexz, I am currently using it and it gives a good battery life.

Kuyte said:
The phone is 1.5 years old. On the battery the date is: 2011/07/26
Click to expand...
Click to collapse
I've a battery old as yours (04.05.2011)
With any custom ROM my battery life is of 3 hours...
With stock is kinda 5 hours with 2G connection activated.
I'm waiting for a new battery, but if you want to keep your phone alive up to then:
- flash a stock ROM
- install as few apps as you can (I've G+, Stream (FB client), FB messanger, Viber, WhatsApp, App Cache Cleaner, AppZorter and xda app, nothing else T_T)
- do NOT use kernel different from stock
- hope you good luck because first times battery will be strange, after some full usage and discharge now I've the battery life I told before
Hope this could help

I have galaxy gio and it problem is whaen i charge my galaxy gio 3 min later to touch to 100 percent and then i plug out and on it then it show battery is zero

Battery Calibration

Can someone tell me the exact steps for calibrating the battery again? I kinda forgot .. My CM9 battery still can't last for a day ..
Sent from my GT-I8150 using xda app-developers app

TiTAN-O-One said:
Can someone tell me the exact steps for calibrating the battery again? I kinda forgot .. My CM9 battery still can't last for a day ..
Sent from my GT-I8150 using xda app-developers app
Click to expand...
Click to collapse
Well, try to discharge your phone until it fully drained, and charge your phone until it reaches to 100%, should be powered of,unplug, then use it the normal way, until it fully discharge and do the same, for at least 3 charging cycles.
Or charge your phone to 100% then before unplugging, go to /data/system and removed batterystats.bin.
I hope it will help, the first step is I think the most accurate, than using such apps.
Thank you,

TiTAN-O-One said:
Can someone tell me the exact steps for calibrating the battery again? I kinda forgot .. My CM9 battery still can't last for a day ..
Sent from my GT-I8150 using xda app-developers app
Click to expand...
Click to collapse
Best is to charge and discharge for a few times without whiping battery stats. It will calibrate itself. Whiping battery stats to incrase battery life was already proven several times to be a myth. The stats will be anyway overwritten completely after a few cycles. So whiping them even can make things worse till the new stats are filled.
However under some circumstates this might help, but you must take into account it can first drain more till the stats are filled and you get accurate readings. I only once whiped the stats while changing the battery from a LI-Ion to a LI-Polymer because the LI-Polymer is behaving a bit different.
More important is to care about the full gaugue, because this can show incorrect values and fill the battery stats with these. This is for example the case if pluging in the charger at 30% and rebooting and getting after the reboot for example 70% displayed. It´s simply impossible the battery gets charged by about 40% within 1 or 2 minutes while it´s booting. The same often happens when going into CWM recovery and rebooting afterwards. Therefore I always charge the phone to 100% before going into recovery and keep the phone pluged into the charger while for example doing a backup or flashing a kernel.
There are many reasons why the battery can´t last that long. For example apps or services keeping you phone awake, wifi or mobile data being enabled the whole time, or the battery itself going down the hills. For me wifi is draining a lot, even with a reduced voltage in the kernel. One of the services that can cause high battery drain is the media server and media scanner if it can´t handle the media type or index the media names due to some SQL prefixes included in the names.
But when speaking about the kernel it looks like Arco fixed the high battery drain issue in the final CM9. I flashed it last night and il looks like it´s draining just as much as if I were using RC2 or RC3 with Arcos stock 2.6 kernel.

jakelq said:
Well, try to discharge your phone until it fully drained, and charge your phone until it reaches to 100%, should be powered of,unplug, then use it the normal way, until it fully discharge and do the same, for at least 3 charging cycles.
Or charge your phone to 100% then before unplugging, go to /data/system and removed batterystats.bin.
I hope it will help, the first step is I think the most accurate, than using such apps.
Thank you,
Click to expand...
Click to collapse
honeyx said:
Best is to charge and discharge for a few times without whiping battery stats. It will calibrate itself. Whiping battery stats to incrase battery life was already proven several times to be a myth. The stats will be anyway overwritten completely after a few cycles. So whiping them even can make things worse till the new stats are filled.
However under some circumstates this might help, but you must take into account it can first drain more till the stats are filled and you get accurate readings. I only once whiped the stats while changing the battery from a LI-Ion to a LI-Polymer because the LI-Polymer is behaving a bit different.
More important is to care about the full gaugue, because this can show incorrect values and fill the battery stats with these. This is for example the case if pluging in the charger at 30% and rebooting and getting after the reboot for example 70% displayed. It´s simply impossible the battery gets charged by about 40% within 1 or 2 minutes while it´s booting. The same often happens when going into CWM recovery and rebooting afterwards. Therefore I always charge the phone to 100% before going into recovery and keep the phone pluged into the charger while for example doing a backup or flashing a kernel.
There are many reasons why the battery can´t last that long. For example apps or services keeping you phone awake, wifi or mobile data being enabled the whole time, or the battery itself going down the hills. For me wifi is draining a lot, even with a reduced voltage in the kernel. One of the services that can cause high battery drain is the media server and media scanner if it can´t handle the media type or index the media names due to some SQL prefixes included in the names.
But when speaking about the kernel it looks like Arco fixed the high battery drain issue in the final CM9. I flashed it last night and il looks like it´s draining just as much as if I were using RC2 or RC3 with Arcos stock 2.6 kernel.
Click to expand...
Click to collapse
Good stuff here! thanks! Gonna try these stuffs out!:thumbup:
Sent from my GT-S6500 using xda app-developers app

honeyx said:
Best is to charge and discharge for a few times without whiping battery stats. It will calibrate itself. Whiping battery stats to incrase battery life was already proven several times to be a myth. The stats will be anyway overwritten completely after a few cycles. So whiping them even can make things worse till the new stats are filled.
However under some circumstates this might help, but you must take into account it can first drain more till the stats are filled and you get accurate readings. I only once whiped the stats while changing the battery from a LI-Ion to a LI-Polymer because the LI-Polymer is behaving a bit different.
More important is to care about the full gaugue, because this can show incorrect values and fill the battery stats with these. This is for example the case if pluging in the charger at 30% and rebooting and getting after the reboot for example 70% displayed. It´s simply impossible the battery gets charged by about 40% within 1 or 2 minutes while it´s booting. The same often happens when going into CWM recovery and rebooting afterwards. Therefore I always charge the phone to 100% before going into recovery and keep the phone pluged into the charger while for example doing a backup or flashing a kernel.
There are many reasons why the battery can´t last that long. For example apps or services keeping you phone awake, wifi or mobile data being enabled the whole time, or the battery itself going down the hills. For me wifi is draining a lot, even with a reduced voltage in the kernel. One of the services that can cause high battery drain is the media server and media scanner if it can´t handle the media type or index the media names due to some SQL prefixes included in the names.
But when speaking about the kernel it looks like Arco fixed the high battery drain issue in the final CM9. I flashed it last night and il looks like it´s draining just as much as if I were using RC2 or RC3 with Arcos stock 2.6 kernel.
Click to expand...
Click to collapse
thanked for the info on latest cm9 battery performance

TiTAN-O-One said:
Good stuff here! thanks! Gonna try these stuffs out!:thumbup:
Sent from my GT-S6500 using xda app-developers app
Click to expand...
Click to collapse
You might take a look on this one too when speaking of battery calibration:
http://forum.xda-developers.com/showthread.php?t=1460553
Calibration with apps by wiping battery stats is useless.

Battery in cm9 eol and cm9 rc3
Does battery of cm9 eol same like battery of cm9 rc 3 with honeyx's kernel and also how long the battery can last from 100% to 0%?
Bcoz I feel like my battery drop frm 100% until 87% in about 1 hour use cm9 rc3 with honeyx 's kernel...
Sorry my English so BAD

w4nkh4iri said:
Does battery of cm9 eol same like battery of cm9 rc 3 with honeyx's kernel and also how long the battery can last from 100% to 0%?
Bcoz I feel like my battery drop frm 100% until 87% in about 1 hour use cm9 rc3 with honeyx 's kernel...
Sorry my English so BAD
Click to expand...
Click to collapse
It´s nearly the same. Not exactly the same, but nearly the same, so it will not become better if you switch to CM9 EOL but probably a little bit worse. All depends to your battery health and how you are using your device.
I find the 2.6 kernel still a little bit better when it comes to battery life than the one in the final CM9, but since the differences are really small I´m already using the final release with a modified kernel.
This kernel has a few more optimizations for battery life and I will launch it quite soon after some more tests are done.
Don´t know how you are using your device and what apps are installed on your phone, but if your WiFi and Mobile Data is always on, there are a lot of apps running in the background and you are very often using your phone, your results are still very good.
Else better replace your battery with a new one, as there is no kernel that will turn a bad battery into a shiny new one.

honeyx said:
It´s nearly the same. Not exactly the same, but nearly the same, so it will not become better if you switch to CM9 EOL but probably a little bit worse. All depends to your battery health and how you are using your device.
I find the 2.6 kernel still a little bit better when it comes to battery life than the one in the final CM9, but since the differences are really small I´m already using the final release with a modified kernel.
This kernel has a few more optimizations for battery life and I will launch it quite soon after some more tests are done.
Don´t know how you are using your device and what apps are installed on your phone, but if your WiFi and Mobile Data is always on, there are a lot of apps running in the background and you are very often using your phone, your results are still very good.
Else better replace your battery with a new one, as there is no kernel that will turn a bad battery into a shiny new one.
Click to expand...
Click to collapse
Ok,mybe i install all of apps that i use...Can i use ur kernel that ur modified with final cm9?? ..just wanna use it...and thanx
Sorry my English so BAD

w4nkh4iri said:
Ok,mybe i install all of apps that i use...Can i use ur kernel that ur modified with final cm9?? ..just wanna use it...and thanx
Sorry my English so BAD
Click to expand...
Click to collapse
Sure, you just have to wait a bit till I release it as i need to test it for stability before launching it and am doing this for a couple of days to be 100% sure.

honeyx said:
Sure, you just have to wait a bit till I release it as i need to test it for stability before launching it and am doing this for a couple of days to be 100% sure.
Click to expand...
Click to collapse
Great,thanx u for share ur kernel..i can't waiting to using it
but i dont understand to battery life extender
" Use RootExplorer and go to: '/sys/class/misc/batterylifeextender'. Change the value in 'charging_limit' for example to 90 (default 100). This will set a limit for the capacity to which the battery will be charged. So in this example the battery will be charged to 90%.
----------------------------------------------------
After flashing the kernel whipe your cache and dalvik cache and fix permissions."
Mean that change value before flash kernel??
Sorry my English SO BAD

w4nkh4iri said:
Great,thanx u for share ur kernel..i can't waiting to using it
but i dont understand to battery life extender
" Use RootExplorer and go to: '/sys/class/misc/batterylifeextender'. Change the value in 'charging_limit' for example to 90 (default 100). This will set a limit for the capacity to which the battery will be charged. So in this example the battery will be charged to 90%.
----------------------------------------------------
After flashing the kernel whipe your cache and dalvik cache and fix permissions."
Mean that change value before flash kernel??
Sorry my English SO BAD
Click to expand...
Click to collapse
No problem, but wrong thread. You can´t change this value before flashing the kernel as it doesn´t exist before flashing a kernel that supports battery life eXtender. So only possible to change this after flashing it.

honeyx said:
No problem, but wrong thread. You can´t change this value before flashing the kernel as it doesn´t exist before flashing a kernel that supports battery life eXtender. So only possible to change this after flashing it.
Click to expand...
Click to collapse
Sorry bcoz ask u in wrong thread. Mean that, after i flash kernel,go to rootexplorer and change it and last reboot...if i wrong please correct to me
Sorry my English so BAD

w4nkh4iri said:
Sorry bcoz ask u in wrong thread. Mean that, after i flash kernel,go to rootexplorer and change it and last reboot...if i wrong please correct to me
Sorry my English so BAD
Click to expand...
Click to collapse
Just change it without rebooting afterwards. If you reboot after changing this value, it will be reset to the default value (100).
So to permamently change this value on each reboot you need to use a tool that will do this for you at each booting. Don´t remember which app is actually supporting BLX, but there is one that will do this for you.

honeyx said:
Just change it without rebooting afterwards. If you reboot after changing this value, it will be reset to the default value (100).
So to permamently change this value on each reboot you need to use a tool that will do this for you at each booting. Don´t remember which app is actually supporting BLX, but there is one that will do this for you.
Click to expand...
Click to collapse
So flash kernel and reboot.After that,go to rootexplorer and change value...but how about after flashing the kernel whipe your cache and dalvik cache and fix permissions???

w4nkh4iri said:
So flash kernel and reboot.After that,go to rootexplorer and change value...but how about after flashing the kernel whipe your cache and dalvik cache and fix permissions???
Click to expand...
Click to collapse
No. Go to CWM recovery. Flash kernel. Stay in CWM Recovery, whipe cache, whipe dalvik cache and fix permissions. Reboot. Then you can use root explorer to change the BLX value once it has booted.

honeyx said:
No. Go to CWM recovery. Flash kernel. Stay in CWM Recovery, whipe cache, whipe dalvik cache and fix permissions. Reboot. Then you can use root explorer to change the BLX value once it has booted.
Click to expand...
Click to collapse
Mean that,that BLX exist when after flash kernel and whipe cache,whipe cache, whipe dalvik cache and fix permissions.
Now,I feel like i see that how to use BLX. Thanx u.
So my English Bad

Bad Battery Life since KitKat

Hi Guys,
i have a bit of a problem with the battery in my GNex maguro.
I'm an avid Rom flasher, but when i have something that works well i usually settle with it for a while. So i flashed Cataclysm (http://forum.xda-developers.com/showthread.php?t=1995801) sometime in the last months and it was running great. Best bettery life i had so far.
Then with the release of Android 4.4 i looked for a rom to test it. I flashed XP (http://forum.xda-developers.com/showthread.php?t=2539201) and i really like the 4.4 changes.
But since then my battery won't even last a day in standby mode. I thought maybe it's an issue with 4.4. still, but even after flashing back to Cataclysm (newest release) i still had the same issues. I thought it may well be, that the final version isn't what it used to be, so i flashed another rom again. This time Purity (http://forum.xda-developers.com/showthread.php?t=2012706) aaaand... still the same problem. So now i'm pretty much lost. I also tried different kernels (lean kernel specifically) but to no avail.
My battery used to last 2+ days in idle mode. Now i can see my battery drop every minute. It barely holds over 10 hours. I already did a full phone wipe and flashed back to stock before installing cataclysm again but still no improvement.
I hope someone can help me here or point in the right direction.
Sorry if this topic already exists, but the search funtion doesn't seem to work right now and google didn't show something helpfull.
Thank you all in advance.

I don't know why you would still have bad battery life moving back to the original rom you used but.. on 4.4 it is most likely the new Google Now features that constantly listen for voice commands. Disable it by long pressing on an empty part of the home screen and go to settings. Slide Google Now Off and go to voice and turn off hotword detection as well.
I get great standby battery life on 4.4. I'm running the 11/29 ART build of cmetal(toro), 150ish hours of uptime without any issues so far.

Re: Bad Battery Life since KK
What kernel are you running? Are you just using whatever kernels come with each ROM?

I'll try turning off google now and the voice stuff and report back.
It still seems really weird to me, that the problem still persists after flashing back to 4.3. My guess would be, that 4.4 flashes something hidden that messes with the battery. But i don't know where or what.
Especially since it persists after a complete wipe (/data, /system and /cache).
Well, i'll see how it behaves without google now.
What kernel are you running? Are you just using whatever kernels come with each ROM?
Click to expand...
Click to collapse
Well i used mostly lean Kernel with 4.3 roms but i can't find any 4.4 kerneles besides CM. I have XP installed right know which uses CM Kernel.

Re:Bad Battery
Make sure your governor is set to interactive or ondemand...it could be seeing power drain from being set to one of the performance settings.
It's also possible that your battery is just going bad...do you have a backup battery you can try?
Well i used mostly lean Kernel with 4.3 roms but i can't find any 4.4 kerneles besides CM. I have XP installed right know which uses CM Kernel.[/QUOTE]

It could just be that you need to replace your battery. They are only good for so many charges and do degrade.
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Reporting back. After deactivating google now yesterday my battery is still ****. It's at 50% after 2h idle and 30 minutes screentime. Before the 4.4 flash it would be at around ~85-90% now. I suspect that 4.4 flashes something in some hidden partition that i don't have access to, that messes with the battery. Users on other boards report the same issues as i have.
dwoods1983 said:
Make sure your governor is set to interactive or ondemand...it could be seeing power drain from being set to one of the performance settings.
It's also possible that your battery is just going bad...do you have a backup battery you can try?
Click to expand...
Click to collapse
Just checked. Governor is set to interactive. It's also the default setting.
I sadly don't have a backup battery.
It could just be that you need to replace your battery. They are only good for so many charges and do degrade.
Click to expand...
Click to collapse
Could be, of course. But it's kinda weird that the decline is so dramatic and it has to be a pretty big coincidence that it just happend after a 4.4 flash. Seems unlikely to me.
edit: I'll order a new battery just to eliminate the battery as the source of error.

Mine is pretty bad but it's running google play to death so maybe gapps flash was bad? dunno

merid14 said:
Mine is pretty bad but it's running google play to death so maybe gapps flash was bad? dunno
Click to expand...
Click to collapse
this maybe issue of ram management.. try some good apps to control those background & foreground app from running without control. dont use any task killer.. please
i recommend using greenify.apk. donate version much better.
sorry for my bad english
galaxy nexus i9250

Same problem here. Since I flashed Kitkat on my phone, battery life isn't enough to last a day on standby. I tried installing another kernel (ASKP) but to no avail. Please keep in mind that I'm not very experienced with custom roms and rooting my phone. Does anyone have some good tips to improve battery life?

Update: After fiddling around a bit with better battery stats, greenify and a bunch of other stuff... i still don't have a solution. I made some screenshots of my stats, but can't post them here because i don't have permission to do that...

So i reflashed swordrune's cm11 rom and it seems to be working better with 1080p kernel w/o art enabled. i'm 11 hrs in with 80% battery on the extended battery (toro btw)

Un4s said:
Update: After fiddling around a bit with better battery stats, greenify and a bunch of other stuff... i still don't have a solution. I made some screenshots of my stats, but can't post them here because i don't have permission to do that...
Click to expand...
Click to collapse
are u sure greenify didnt helping??? already got rooted & exposed installer running??
can u state your screen on time??
usually gnex can handle 3-4 hour screen on depend on battery condition n phone performance... not include idle n stanby time.
galaxy nexus i9250

memaro_maro said:
are u sure greenify didnt helping??? already got rooted & exposed installer running??
can u state your screen on time??
Click to expand...
Click to collapse
Yes, i am rooted, but i didn't have the donate version of greenify. Bought it now and will test again.
Screen on time ~1:30h

Un4s said:
Yes, i am rooted, but i didn't have the donate version of greenify. Bought it now and will test again.
Screen on time ~1:30h
Click to expand...
Click to collapse
that will help.
if u lightweight user, i suggest u to optimized performance. use apps such trickster mod, rom toolbox, or in addition of any light battery saving apps ( for optimization)
should be improve on screen time.
galaxy nexus i9250

Not to hijack your thread, but I'm also experiencing battery issues after flashing the XP 4.4 rom. I did enjoy it but the battery drain was terrible. Not only that, for some reason my charger drains on a 1A charger but charges slowly on a .7A somehow. I only have 1 micro usb cable so I can't test if it's the cable and I can't find any apps to check the current speed. I tried downgrading and flashing to Slimbean but so far it's been no dice.

memaro_maro said:
that will help.
if u lightweight user, i suggest u to optimized performance. use apps such trickster mod, rom toolbox, or in addition of any light battery saving apps ( for optimization)
should be improve on screen time.
Click to expand...
Click to collapse
Ok, back again. hibernated every app and system-app that was running in background. Still wasn't getting better. I then saw the only services still running are google location services. I deactivated them now to see if these are causing it.
The biggest wakelocks i have are "wlan_rx_wake" which seem to be a known problem with KK:
http://forum.xda-developers.com/showthread.php?t=2519294
I then researched again and found several threads in google groups which describe the same problems that i have. Across several devices (though mostly Nexus 4, 5 and 7).
Google seems to be aware of that issue and is working on it.
Not to hijack your thread, but I'm also experiencing battery issues after flashing the XP 4.4 rom. I did enjoy it but the battery drain was terrible. Not only that, for some reason my charger drains on a 1A charger but charges slowly on a .7A somehow. I only have 1 micro usb cable so I can't test if it's the cable and I can't find any apps to check the current speed. I tried downgrading and flashing to Slimbean but so far it's been no dice.
Click to expand...
Click to collapse
Yes, same for me. Charging is really slow since 4.4 as is the bootprocess of my phone. From the first vibrate when switching the phone on it takes ~10 seconds until the google logo pops up.

i dont know any about gapps issues bcoz not running any gapps in my phone since last year.
1. try searching for updated radio.img (baseband/ radio) if got any network issue.
2. try install trickster mod app. this app can help you for tweaking into deep sleep, also help for optimizing.
galaxy nexus i9250

crayjin said:
Not to hijack your thread, but I'm also experiencing battery issues after flashing the XP 4.4 rom. I did enjoy it but the battery drain was terrible. Not only that, for some reason my charger drains on a 1A charger but charges slowly on a .7A somehow. I only have 1 micro usb cable so I can't test if it's the cable and I can't find any apps to check the current speed. I tried downgrading and flashing to Slimbean but so far it's been no dice.
Click to expand...
Click to collapse
try this for helping you go into deep sleep
galaxy nexus i9250

memaro_maro said:
try this for helping you go into deep sleep
galaxy nexus i9250
Click to expand...
Click to collapse
Hmm I don't know if this is going to resolve the charging problem but i will try it and also try and use a battery calibrater and come back.