Database Users

Haveing bad Battery Life? Read this.

Hey people,hows it going?
I have decided to create this thread to help people who arent very happy with their battery life pre/after the 2.1 update.
Aighty guys lets see : The improvements in 2.1 are VERY awesome if you combine it with things to make it total ownage.
Battery Life : Mine lasts 12h with very heavy usage, without usage it can last more than 48h...
Updated since sunday night so i got more than enough experience with it.
If you got bad battery life you can do followings :
1)Root + SetCPU : Lower the "Minimum" quantity so the CPU would idle very lowly and so you get more battery life ,i reccomend getting 245 there (This phase can be dangerous,if you dont know what you're doing ,skip this one)
2)Use Task Manager Pro : Shut down apps that eat the RAM, those who say "unused ram is wasted" , imo thats false as if you got more ram free : More battery life,better phone usage,less lags,and more space in case updates of twitter/fb etc come on ,i usually got around 105mb free always left (Excluded updates for social's & news & weather,live wall,android apps and stuff that i really need)
3)Still not fixed? Get a Battery-life-saver launcher and replace the Home one,as SE didnt work 2.1's home to good so its laggy and battery-eater.
4)Widgets?Have you got loads of news/updates widgets or apps? Try to lower the "Update rate", facebook updates as default each 5 mins,set it to around 2h or so,you dont need less than that.
5)Still pittyful? Check how much you use it, if i use my phone alot i get maybe less than 12h of battery life, but if you use it just the necesary trust me,you can get up to 3 days straight.
Battery life also depends on how much you use it.
5.1)Games specially can use loads of battery,so if you get a use of about 25% in 1 hour,thats very good battery life,so its normal.
5.2)Temperatures in battery can also go upper as you use it ,cause apps and your hand behind the phone cause heat,so you're alright if temp go up to 45ºC,which would be the safe limits. I would panic if it went up to 50ºC.
6)If you have just updated to 2.1 leave it a few days,it is quite bad at first as the system needs to update all its settings ,all its new stuff,just like when you install a new OS on a computer,it needs to "Start windows for the first time".
7)If its still very bad,then your battery might be damaged,get a new one and remember that the first 2-3 charges to take at least 8h,to make sure its lifespan is gonna be high.
In conclusion : Dont just say "My battery life sucks now", Battery depends on how much you use the phone,on how much your apps/timescape/mediascape/Social feeds/News feeds use your phone as much as gps/wifi/bluetooth of it.
Check everything you can,do everything i said and then see if ur battery is damaged or not,cause the 2.1 system didnt do worse,it actually did better than 1.6 after its perfectly settled.
Hope this helps out,take care ^
Regards

very good writeup, which launcher do you recommend?

in regards to this i believe you but it's just not happening to me
please suggest something.
my battery is awesome on standby....but as soon as i turn screen on and play for eg angry birds for 1hr it drops approx 25%. is that how it should be?
no wifi bluetooth gps etc. live wallpaper is there but i also try w/o live wallpaper. i use task killer and kill off unnecessary things
the only thing i haven't done is root and reduce cpu speed because the phone should work quite well w/o me having to do that.
My temp goes up to 43 at times. is that normal?
what am i doing wrong?

thran8 said:
very good writeup, which launcher do you recommend?
Click to expand...
Click to collapse
So far , LauncherPro did a very good job for me,there are loads of stuff you can tweak there like even from 3 to 7 homescreens, as you wish,the less the more battery so,depends on which you wish,you can select.
Also Helix Launcher is very famous for beeing able to save battery alot, tho it hasnt got so many options like LauncherPro.
If its very good battery life your searching : Helix Launcher
If you're looking for a good balanced launcher : LauncherPro
Goodluck.

law910 said:
in regards to this i believe you but it's just not happening to me
please suggest something.
my battery is awesome on standby....but as soon as i turn screen on and play for eg angry birds for 1hr it drops approx 25%. is that how it should be?
no wifi bluetooth gps etc. live wallpaper is there but i also try w/o live wallpaper. i use task killer and kill off unnecessary things
the only thing i haven't done is root and reduce cpu speed because the phone should work quite well w/o me having to do that.
what am i doing wrong?
Click to expand...
Click to collapse
25% in a hour after playing? Yes that is normal as games stress the CPU and screen brightness to max, so yes after gaming the battery does suffer a bit.
Nah if you dont want dont reduce cpu min speed.
Imo ,charge the phone completely , then right after charging , play Angry birds for 1h again and check battery. Sometimes the battery discharges faster than other times (Depends on the charge of it, if its @ 95% it will go down alot faster,unlike if its at 30%,it will go down slower. Its just a battery theory that is accurate most of the time)
So check from what % you started playing to what % you've stopped playing.
Tell me the results then.
And then i repeat,make sure you reduce facebook/twitter/email "update rate".
(More time(once in 2h not in each 5 mins) = Better cause it will access the internet less so more battery)

xtrmshadow said:
2)Use Task Manager Pro : Shut down apps that eat the RAM, those who say "unused ram is wasted" , imo thats false as if you got more ram free : More battery life,better phone usage,less lags,and more space in case updates of twitter/fb etc come on ,i usually got around 105mb free always left (Excluded updates for social's & news & weather,live wall,android apps and stuff that i really need)
Click to expand...
Click to collapse
I used to support it, till I opened my mind to those theories, so now I argued. With many reading and my own experiment, I would still argue that droid are doing best it could.
http://forum.xda-developers.com/showthread.php?t=777034
With my summary, without ATK could result in even better battery life.
http://forum.xda-developers.com/showthread.php?t=678205&page=10
Some technical statement about android memory.
HOWEVER,
To correct your statement, it's TRUE that leaving more processes behind could result in significant drain of battery, but this is due to CPU usage, not RAM.
So yes, Leaving some process which draining CPU power behind could give much worse battery life.
So IMO, it more depends on your background process, but I would say that in most situation, just leave the droid do its job
7)If its still very bad,then your battery might be damaged,get a new one and remember that the first 2-3 charges to take at least 8h,to make sure its lifespan is gonna be high.
Click to expand...
Click to collapse
You don't need that any longer. But it's true that the lifespan could be 'higher' after a few usage, but this is due to 'calibration', not the performance of the battery itself.
Imagine
real battery is 10%, android report 3%
real battery is 90%, android report 100%
so you are using only 10% to 90%, that considered 20% lose.

Li-po batteries ain't meant to be drain to the last, if you do thy won't last and you soon be needing to replace your battery, I would think that it is programmed to monitor the usage to not do that but the battery % that you see is not actually whats left on the battery itself.

I was reading a pdf ebook and the battery dropped around 35% in 2 hours :S
I'm running the battery test in the service menu at the moment to see if my battery is faulty.

I don't use a manager - i don't use setCpu and I can easily get 24 hours + since 2.1
I'm just saying .

I stream music from di.fm using wifi 8h/day.
My phone lasts about 4h so, i have to charge it 3 times/day
Now, i want to see tips how to improve this

Herr Noobien said:
I was reading a pdf ebook and the battery dropped around 35% in 2 hours :S
I'm running the battery test in the service menu at the moment to see if my battery is faulty.
Click to expand...
Click to collapse
good idea never knew battery test existed in the service menu =]
shall try it tonight

just have a look on the attached photo , i took the photo when the indicator was 15% , still i can ran the phone for another 2 or 3 hours .

I don't know for sure, but it seems to me that the display chews through more battery than before.
Could be that I'm playing games too much but I don't think so. I seem to get the same battery life on idle, but as soon as I do anything (esp. games or talking) the battery just seems to nosedive. Never noticed this before (I used to get two-three days depending on the usage now I'm down to a day or two).
I'm gonna try and do some tests over the next while (starting with flashing back to 1.6 and retesting that properly).

tipically, display (screen) accounts for 2/3s of the total battery usage
check the battery usage app (settings -> battery), you'll be amazed
then make a simple test:
reduce brightness by half and your battery will last A LOT longer
Personaly, I prefer to carry my charger than dimming the screen
.

gtrab said:
tipically, display (screen) accounts for 2/3s of the total battery usage
check the battery usage app (settings -> battery), you'll be amazed
then make a simple test:
reduce brightness by half and your battery will last A LOT longer
Personaly, I prefer to carry my charger than dimming the screen
.
Click to expand...
Click to collapse
Back,soz my internet crashed -_-
And true,the Screen uses 2/3 or even more, everytime i check it sucks around 75% or so if you use it alot.
Also @Cebees Yes thats true,thats why i sugested a task manager Cutting processes cleans ram memory but also cleans cpu usage.
True you can let the droid do its things but most of the time its not Droid who is eating the battery to death,its 3rd party apps which remain On even after usage (Like when you select a live wall and then change it,the other remains on and some walls arent very good optimized so ...if 1 Live-wall eats a bit of battery,imagine 3 or 4 ?)
Also : Gaming / GPS navigation And Wifi Navigating are the main and most power hungry tasks for a phone to do,so its normal that if you're doing any of those,the battery lasts like nothing.
One Tip : Always take ur charger with you Also take the MicroUSB->USB cable off your charger and use it while your in your car (Buy a Cigarette->USB adaptor,costs less than 10 quid) and then you can charge it while you're in your/your dad's car, that way you'll maintain the battery a bit more alive.
Also if you really think your battery just isnt up for your needs, there is a 3600mAh (Think its Called Mugen 3600 or smth)battery out there for the X10,it is kinda bulky but it doubles and some times even more the life of the normal 1500mAh Stock battery.
Btw,if you want to buy a new battery and a 3600mAh one is too expensive,try to get a 2000+ one...as there was tested that up to 1800mAh arent exactly Shiny,just a very slight (Minutes)improvement over the stock 1500mAh one.
As you can see,there's loads of things that can cause a battery life to be poor
So keep on trying ^^ Im sure it will all go great.
I charged mine yesterday at morning,and i still got 67% Today,so i believe i can manage a total of 3 days straight ...and i did eventually use my phone to listen to music,put some live walls and make some calls.
Also trust me...the Launcher does make a diference,specially if you get the Helix one...i used it and my battery used to manage up to almost 5 days straight (With little use).
Oh and @Cebees : I know that the 8hour thing isnt exactly necesary today , but eventhought they say its not ,i believe i've been told by someone who knows about this that its good for the battery to be totally maxed in the first charges and then left to total emptyness(if possible until phone shuts down or is about to) that way it does calibrate (As you said before) and it does also maximise its life (Technically,i could be wrong , but my always done that with my wife's and daughter's phone and they always worked like a charm and trust me ,my daughter cant get her hands off her phone -_-)
Regards

xtrmshadow said:
Hey people,hows it going?
I have decided to create this thread to help people who arent very happy with their battery life pre/after the 2.1 update.
Aighty guys lets see : The improvements in 2.1 are VERY awesome if you combine it with things to make it total ownage.
Battery Life : Mine lasts 24h with very heavy usage, without usage it can last more than 48h...
Updated since sunday night so i got more than enough experience with it.
If you got bad battery life you can do followings :
1)Root + SetCPU : Lower the "Minimum" quantity so the CPU would idle very lowly and so you get more battery life ,i reccomend getting 245 there.
2)Use Task Manager Pro : Shut down apps that eat the RAM, those who say "unused ram is wasted" , imo thats false as if you got more ram free : More battery life,better phone usage,less lags,and more space in case updates of twitter/fb etc come on ,i usually got around 105mb free always left (Excluded updates for social's & news & weather,live wall,android apps and stuff that i really need)
3)Still not fixed? Get a Battery-life-saver launcher and replace the Home one,as SE didnt work 2.1's home to good so its laggy and battery-eater.
4)Widgets?Have you got loads of news/updates widgets or apps? Try to lower the "Update rate", facebook updates as default each 5 mins,set it to around 2h or so,you dont need less than that.
5)Still pittyful? Check how much you use it, if i use my phone alot i get maybe less than 12h of battery life, but if you use it just the necesary trust me,you can get up to 3 days straight.
Battery life also depends on how much you use it.
6)If you have just updated to 2.1 leave it a few days,it is quite bad at first as the system needs to update all its settings ,all its new stuff,just like when you install a new OS on a computer,it needs to "Start windows for the first time".
7)If its still very bad,then your battery might be damaged,get a new one and remember that the first 2-3 charges to take at least 8h,to make sure its lifespan is gonna be high.
In conclusion : Dont just say "My battery life sucks now", Battery depends on how much you use the phone,on how much your apps/timescape/mediascape/Social feeds/News feeds use your phone as much as gps/wifi/bluetooth of it.
Check everything you can,do everything i said and then see if ur battery is damaged or not,cause the 2.1 system didnt do worse,it actually did better than 1.6 after its perfectly settled.
Hope this helps out,take care ^
Regards
Click to expand...
Click to collapse
Something bothers me here. During your intro, you say with "very heavy" usage, you get 24 hours battery. Then. In step 5, you say that if you use your phone alot, you get maybe less than 12 hours usage. I dont get it. :-S
Sent from my X10i using Tapatalk

lawless_benji said:
Something bothers me here. During your intro, you say with "very heavy" usage, you get 24 hours battery. Then. In step 5, you say that if you use your phone alot, you get maybe less than 12 hours usage. I dont get it. :-S
Sent from my X10i using Tapatalk
Click to expand...
Click to collapse
lol ups,yeah the 24h thing is a mistake,ima correct that.
Thanks ^

xtrmshadow said:
lol ups,yeah the 24h thing is a mistake,ima correct that.
Thanks ^
Click to expand...
Click to collapse
Cool! No problem!
Sent from my X10i using Tapatalk

My battery life got worse on 2.1.
On 1.6 I would unplug my phone at 6:20 am and listen to music for an hour then I would mess with my phone a little bit between 7:20 and 2:15. Then after that I would listen to music for another hour while surfing facebook. By time I get home at 3:20 I'm down to 60 percent. But if I do that on 2.1 by time I get home I'll be at 30 percent. Also I have juice defender ultimate that shuts off my 3g everytime the screen is off.
Sent from my X10i using XDA App

http://www.appbrain.com/app/autokiller-memory-optimizer/com.rs.autokiller
I'd prefer this one rather than auto task killer
a bit friendly for droid, except chuck norris one.

consistently mediocre battery life even after calibration and undervolt

I just can't seem to crack the battery life conondrum. I've calibrated (charge to 100%, wipe stats, then full cycle).
If I'm listening to music its consistently I'm sucking ~10% an hour, if idling ~4-5%. Which means I'm getting around same battery life as my old nexus one – mediocre, I end a working day with around 30-40%. If I want to go out after work i have to remind myself to charge during the day...
Right now I'm even running a mild setcpu undervolt (with faux123 kernel) and profile (screenoff max cpu 600mhz) but seeing not much improvement if any.
I am on gingerbread AT&T radio so thats not it either... any tips aside from 'use juice defender' (which I don't want to do as I want always on data instant push etc., I know juice defender basically shuts your data radio off)?
Note this is the same with stock gingerbread as well as the ROM and kernel I'm currently on (redpill, faux123 kernel)

I've done everything you have and i'm on a Bell Atrix....i have been looking into this for about a week or more and i just can't crack it either!!! it's driving me nuts and i have spent sooo many hours googling, searching xda and other sites and have tested MANY different methods and still can't seem to figure it out. For me i know its the phone idle...but what it is i can't tell, i have SystemPanel monitoring as as well as watchdog which i alternate with. Flashed the battery calibration fix and calibrated the meter blah blah blah....driving me nuts and i know its not a faulty battery because before i unlocked and flashed 2.3.4 i could get about 30 hours with heavy to moderate use!!!
For the love of god i wish a team of dev's would look into this!!!!!!!!

Honestly none of the faux kernels worked for me... Try gobstopper, stock kernel with watchdog was the only combo to give me good battery life. Not to mention lock sounds works properly, and its fast. All bell users should use it. Seriously... 19+ hours worth moderate usage.
phone idle is still high but it seems to be a slow drain.
Sent from my MB860 using XDA App

a.) not an option for me, AT&T phone
b.) I'm not seeing faux's kernel do any worse than stock kernel, I don't think its the kernel?
c.) yeah I tried system monitor as well, the highest process was opera at 3%.... 3 lousy percent lol

1. Calibrate your battery again (I have posted a guide in the General section)
2. Flash a kernel which allows overclocking, install SetCpu, add battery saving profiles (downclock to 500mhz on screen off, downclock to 800 mhz when battery less than 30%, downclock to 800mhz if temperature higher than 50C)
3. Freeze all MotoBlur bloatware (there's a guide in the general section)
4. Disable data and wifi unless you need it
5. Install Watchdog and set it up according to instructions I provided in my calibration thread.

xploited said:
1. Calibrate your battery again (I have posted a guide in the General section)
2. Flash a kernel which allows overclocking, install SetCpu, add battery saving profiles (downclock to 500mhz on screen off, downclock to 800 mhz when battery less than 30%, downclock to 800mhz if temperature higher than 50C)
3. Freeze all MotoBlur bloatware (there's a guide in the general section)
4. Disable data and wifi unless you need it
5. Install Watchdog and set it up according to instructions I provided in my calibration thread.
Click to expand...
Click to collapse
all your solutions he basically either already did (1 and 2), or stated he does not want to (#4) =P

dLo GSR said:
all your solutions he basically either already did (1 and 2), or stated he does not want to (#4) =P
Click to expand...
Click to collapse
Well, if you keep data or wifi turned on at all times, then there's no way you can have something more than mediocre battery life, sorry.
It's not the Atrix'es fault, its the brutal truth with all modern smartphones.

1 personally run ninja speed freak, i get amazing battery life. simply amazing, days on worth of battery!
it is not a kernel issue, i simply dont know exactcly what hack in particular gives ninja the amazing battery life. but im working hard to determing this so i can share it.

samcripp said:
1 personally run ninja speed freak, i get amazing battery life. simply amazing, days on worth of battery!
it is not a kernel issue, i simply dont know exactcly what hack in particular gives ninja the amazing battery life. but im working hard to determing this so i can share it.
Click to expand...
Click to collapse
Perhaps, bypassing MotoBlur sign in

I'm not signed into motorblur either.
I do turn off wifi when out, but bluetooth is normally on.
Sent from my MB860 using Tapatalk

wintermute000 said:
I'm not signed into motorblur either.
I do turn off wifi when out, but bluetooth is normally on.
Sent from my MB860 using Tapatalk
Click to expand...
Click to collapse
The people in this thread have listed all known steps to improving battery life.
If you really follow all of these guidelines and have bad battery life, you might want to try a battery replacement.
If you are sure your battery is not the problem, you might also want to try a couple of custom roms. Who knows maybe you will get lucky with one of them.

xploited said:
Perhaps, bypassing MotoBlur sign in
Click to expand...
Click to collapse
Is there any way to log off from motoblur once you are in so you can stay offline? Of course any connection that gets cut will increase battery life.

I don't understand all these battery life problems. Its got to be an app you are installing or your battery is buggered!
Admittedly when I first installed 2.3.4 OTA, battery life dropped like a stone, but I drained it flat, and then charged it up again and its been fine ever since.
I'm running on stock 2.3.4 without root, and I have quite a lot going on (IM's/Facebook/Twitter) and I can last well over a day and a half with moderate use, this includes sms and calls.

tehrules said:
I don't understand all these battery life problems. Its got to be an app you are installing or your battery is buggered!
Admittedly when I first installed 2.3.4 OTA, battery life dropped like a stone, but I drained it flat, and then charged it up again and its been fine ever since.
I'm running on stock 2.3.4 without root, and I have quite a lot going on (IM's/Facebook/Twitter) and I can last well over a day and a half with moderate use, this includes sms and calls.
Click to expand...
Click to collapse
Battery life is a very subjective issue. One person might be fine with the phone, while the other person will say battery life is terrible with the very same phone.
Besides the obvious drainage problems, it all depends on how you use the phone.

Honestly the best thing that worked for me was turning off "Syncing".
I currently have 3G on, BT on, ETC...
Syncing in the background killed my battery life. Now I usually make it through the day without the need for a top-off...
Sent from my MB860 using XDA Premium App

Im in stock gingerbread and battery life is definitely worse than on stock 2.2.2 and and im basically running the same Apps. I am a heavy user and I used to drop 10% per hour. Switch on at 7am and by 5pm I was changing battery. Now I am switching around 3pm.
That's why I have 3 batteries!
I still think its better than nearly every other device I have owned but that nay be because battery is larger. I dont know why they don't design to put in 2400 mah batteries (my treo 650 had one!).
Sent from my MB860 using XDA App

ekerbuddyeker said:
Im in stock gingerbread and battery life is definitely worse than on stock 2.2.2 and and im basically running the same Apps. I am a heavy user and I used to drop 10% per hour. Switch on at 7am and by 5pm I was changing battery. Now I am switching around 3pm.
That's why I have 3 batteries!
I still think its better than nearly every other device I have owned but that nay be because battery is larger. I dont know why they don't design to put in 2400 mah batteries (my treo 650 had one!).
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
The treo 650 also had a thickness double that of the Atrix .

The batteries in your phone are high-capacity lithium-ion batteries. This kind of battery technology cannot be simply reset and “re-calibrated.” When you follow the steps to recalibrate your battery and delete the batterystats.bin file from your phone, you are getting rid of more than what you think… Stored inside that batterystats.bin file, your phone keeps detailed logs of the capacity of your battery and uses it on how it can be utilized more efficiently. By deleting this file, it basically wipes the phone’s memory on what the battery can really do. This actually does damage to your battery by using up valuable charging cycles, all while giving a fraction of battery life and performance.
Now, you might be saying uh-oh, I’ve already re-calibrated my battery! What do I do?!
Well here’s your answer. Use your phone like normal. Yes, your battery and phone wont perform as good as it can for a while, but after a few days, you will notice that it starts doing better and better. Give it time, its trying to rebuild all those logs that you just deleted.

edgeicator said:
The batteries in your phone are high-capacity lithium-ion batteries. This kind of battery technology cannot be simply reset and “re-calibrated.” When you follow the steps to recalibrate your battery and delete the batterystats.bin file from your phone, you are getting rid of more than what you think… Stored inside that batterystats.bin file, your phone keeps detailed logs of the capacity of your battery and uses it on how it can be utilized more efficiently. By deleting this file, it basically wipes the phone’s memory on what the battery can really do. This actually does damage to your battery by using up valuable charging cycles, all while giving a fraction of battery life and performance.
Now, you might be saying uh-oh, I’ve already re-calibrated my battery! What do I do?!
Well here’s your answer. Use your phone like normal. Yes, your battery and phone wont perform as good as it can for a while, but after a few days, you will notice that it starts doing better and better. Give it time, its trying to rebuild all those logs that you just deleted.
Click to expand...
Click to collapse
This is the first time I am reading this sort of opinion, though I have read countless info on the subject.
If you want to make such a strong point, you better have source to back up your opinion (article, studies, other source of proof, etc).

These threads are all USELESS without NUMBERS.
Like another person with common sense already stated in this thread, you need to provide numbers.
GB has this improved tool (over 2.2) where you can see how your battery is wasting its juice. Watch those numbers for a few charges and then POST THEM TO COMPARE.
Saying your battery sucks without giving any numbers is like calling a color ugly.
(just in case someone misses the points, without numbers it's hard to compare, since it mainly becomes an opinion at that point)
P.S.- Please don't post "My battery lasts for over 9000 hours." and think that's enough info. Use your head.

What's your battery life like?

And can anybody compare it to the Galaxy Nexus, or an iPhone 4/4S (a 4S WITHOUT the battery issue that was going around)?
I'm really interested in switching from 4 to either a 4S or the a Note or Nexus... Battery life is an important thing to me though.
Also, just how much does having blacks on the screen help? How much does that help? If you just wanna answer my first question "How's your battery?" then that's fine. That's what's more important here.

Compared to the iPhone 4, I am getting almost twice the battery run time. I have not changed my habits during my normal day, and use the same apps that are available for both platforms by the same authors. The black home screen does help if you are starring at it all the time, but how often are we doing that?
I am also rooted and using FM kernel. Love the Open Source community.

Yumunum said:
And can anybody compare it to the Galaxy Nexus, or an iPhone 4/4S (a 4S WITHOUT the battery issue that was going around)?
I'm really interested in switching from 4 to either a 4S or the a Note or Nexus... Battery life is an important thing to me though.
Also, just how much does having blacks on the screen help? How much does that help? If you just wanna answer my first question "How's your battery?" then that's fine. That's what's more important here.
Click to expand...
Click to collapse
Some site did a comparison of 3g talk time with a Note and an I****.
The Note got a whopping 14 HOURS of 3g talktime.
The i**** 4s got 8 hours.
So phone vs phone, thr Note wins.
Sent from my GT-N7000 using xda premium

cadavar said:
Compared to the iPhone 4, I am getting almost twice the battery run time. I have not changed my habits during my normal day, and use the same apps that are available for both platforms by the same authors. The black home screen does help if you are starring at it all the time, but how often are we doing that?
I am also rooted and using FM kernel. Love the Open Source community.
Click to expand...
Click to collapse
Holy cow! What's your screen-on time? Are you underclocking or anything? I'm guessing your good battery life was because of the kernel?

even @ stock ROM and Kernel, the NOTE is impressive in terms of batt life except if you're browsing a lot (since we all know that AMOLED consumes more juice in showing white shades compared to other display technology) ... Some ROMs and Kernels have battery saving scripts embedded and you can also find a lot of tips on how to improve batt life on our Note...
In my case, my Note can last 22hours+ of moderate to heavy usage; im using Rocket v6 ROM and FM Kernel (undervolted and underclock to 1200mhz)... I set my Wallpapers to the darker ones, customize goSMS with pure black background and themes, disable fast dormancy, turn off GPS and wifi when not in use, use minimal widget as possible, set the brightness to lower level that suit you, set to GSM mode mostly, disable background data when not needed, delete some unimportant processes in the system, manage startup application, disable task manager, and etc...

Yumunum said:
Holy cow! What's your screen-on time? Are you underclocking or anything? I'm guessing your good battery life was because of the kernel?
Click to expand...
Click to collapse
Yes, the FM kernel did help significantly. The reasoning being that the author disabled the heavy logging Android does for debugging purposes. Other than that, everything in the kernel is stock. No undervolting or underclocking. I also keep away from any app that overclocks the CPU, they usually mess with the phones ability to go into deep sleep.
Screen on time: 4:29m

regarding deepsleep and unwanted processes in background; you can install CpuSpy, Watchdog or Wakeclock monitor app if you're having an abnormal battery drain...

jaytana said:
regarding deepsleep and unwanted processes in background; you can install CpuSpy, Watchdog or Wakeclock monitor app if you're having an abnormal battery drain...
Click to expand...
Click to collapse
CPUSpy is a wonderful lil app. That is how I determined that SetCPU broke the phones ability to go into deep sleep, even after uninstalling it. I had to flash the ROM all over again.

Compared to iphone 4 gnote battery is less... the reason is bigger battery.
However even with heavy usage my battery last till night every day.
battery life has got better with time.

cadavar said:
CPUSpy is a wonderful lil app. That is how I determined that SetCPU broke the phones ability to go into deep sleep, even after uninstalling it. I had to flash the ROM all over again.
Click to expand...
Click to collapse
true... the apps i posted are all essential IMO... wakeclock monitoring is also very helpful in finding faulty apps running...

I'm getting glorious battery compared to my GSII.
Granted it's relatively light usage for now because of work and such, but I'm impressed. Almost always have the brightness at 25%, never need any more.
The sudden drop was from a restart.

My battery life was fine until Google started selling apps for 10p, I downloaded Jelly Defence and I became addicted to playing it...

[ICS] We need your help... Battery life...

Since the beginning of Android one thing has always been an issue with some of the greatest ROMs.
........................Battery life.
Every day lives are drained away by the pleasures and features of such fantastic ROMs... and such things at time seem so hard to bare that we try to change the lives of our battery by going to a different ROM.
So now you have a chance to make a difference, nay, an opportunity to change the lives of many...
This thread is strictly for how to save Battery life. CM9/AOKP have amazing battery life by themselves (but yet can always be made better) But for those on MIUI (Not so great battery life) this will be really useful.
Understand that everyone's device is different and although you may get 15 hours off MIUI/AOKP/CM9 others may only get 4 from them.
Post what it is that helps you achieve maximum Battery life. You may be the one to solve the cure to wowhowdidmybatterylifedroptwentypercentinanhourosis.
Be sure to include:
1. ROM
2. Kernel
3. Tweaks that have been applied through ClockworkMod
4. Apps used to save life
5. What battery you use
6. How long your life lasts
7. Anything else that you think may help

Eclair
Just Eclair
Any Eclair
Shoot me......
But seriously, disabling 3g on ICS saves a ton of battery life.
Sent from my SPH-D700 using Tapatalk 2

marcusant said:
Eclair
Just Eclair
Any Eclair
Shoot me......
But seriously, disabling 3g on ICS saves a ton of battery life.
Sent from my SPH-D700 using Tapatalk 2
Click to expand...
Click to collapse
Uhhh,,,on ANY ROM...but not a practical solution.
I think the OP is looking for more practical solutions where they are not disabling major features of the smartphone.

kennysvgp08 said:
Be sure to include:
1. ROM
2. Kernel
3. Tweaks that have been applied through ClockworkMod
4. Apps used to save life
5. What battery you use
6. How long your life lasts
7. Anything else that you think may help
Click to expand...
Click to collapse
1. CM9, although i think aokp does better.
2. Samurai Kernel, although just about any other ICS kernel should help. The biggest thing that you can change between kernels is the Governor and I/O depending on these two will determine how the CPU runs and in effect will determine battery life. Conservative is just about the best for battery life. If you need slickness and not too worried about battery Ondemand. If you want the best of both worlds i Think Wheatly is a good compromise. Also I/O , Sio is "simple" but VR is flash based so it tends to be the best. Otherwise Noop/Deadline. Also voltage.. undervolting will help limit the amount of well voltage to the CPU. So the lower you can get it the better.
3. Dont have tweaks i apply through CWM but i Run the V6 Supercharger, 3G turbocharger(optional), and the Kick Ass Kernelizer from Zeppelin.
4. I cannot stress this enough, Apps that say they save battery... run... which uses RAM and Resources... meaning its running trying to save you battery, Using battery. Which is stupid... and useless.
5. I have two a 3500Mah and the stock 1.5 year old 1500mah.
6. Typically with 3 hours of display over a period of 15hours (1500 mah) and around 5 hours of display over a period of 22 hours (3500 mah). However this is on wifi, 3g would deduct these a pretty good amount if you have sucky speeds.

He needs to get over it... lol. The only thing that truly saves battery life is managing your connections. There is no magic bullet unfortunately.

PLEASE! Don't tell us to turn off data and never sync the phone. Obviously if you don't use the phone the battery will last forever. I need a phone that can do the following:
Receive emails and texts as they are sent. (I use exchange push)
Last 18 hours on a standard or 1800 mAh battery.
I can just barely make that with stock FC09, I'd love to run ICS but with either CM9 or AOKP I barely make 10 hours.

schnowdapowda said:
He needs to get over it... lol. The only thing that truly saves battery life is managing your connections. There is no magic bullet unfortunately.
Click to expand...
Click to collapse
Why must people post unhelpful comments such as the one above? I don't understand the logic there...
anyways since this was aimed at miui I get pretty good battery life with it... (3.5 hours screen on time) nyan v5 ftw! No special features... uv a lot (won't list my settings cuz every phone is different) and no oc... used to use jd but, it saves more battery if you just switch things off manually... really though until I flashed nyan my battery life was atrocious, but now just about on par with the peoples rom (4.5 to 5 hours screen on time!) Oh yeah, all this with the stock battery...

poit said:
PLEASE! Don't tell us to turn off data and never sync the phone. Obviously if you don't use the phone the battery will last forever. I need a phone that can do the following:
Receive emails and texts as they are sent. (I use exchange push)
Last 18 hours on a standard or 1800 mAh battery.
I can just barely make that with stock FC09, I'd love to run ICS but with either CM9 or AOKP I barely make 10 hours.
Click to expand...
Click to collapse
On aokp with 1800 mAh i can do about 3Hours of screen on time and 15 Hours of battery life and my phone was awake 75% of the time.
Screenie was at 15%
This was stock Everything Except ROM haha

XxLostSoulxX said:
On aokp with 1800 mAh i can do about 3Hours of screen on time and 15 Hours of battery life and my phone was awake 75% of the time.
Screenie was at 15%
This was stock Everything Except ROM haha
Click to expand...
Click to collapse
Think about if your screen was on while the device was awake..your time would be cut in half
Sent from my SPH-D700 using XDA

Oh my good golly gosh.
I just realized the best battery life I ever got was on DK28.
So take that. Let's go Frankenstein.
1. CM9 KANG June 02 build.
2. Stock
3. Services for V6 and Search Key Remap
4. Ha!
5. Stock. Came with device...need new one.
6. Depends on use. But I usually get the estimated six hours consistently.
7. If you're going to use a task killer just use the built in one. Overclocking is bad, and in my experience so is undervolting. GTalk, official Facebook application(especially this. Even with notifications off it still is always going), G+, and more are always running and are a drain. No live wallpapers, and no widgets that require constant updating. As much black as possible. Don't use third-party batteries. Obviously turning off 3G, 4G, sync, and such will dramatically increase your battery life.
WAIT! Why am I writing this? There is a freaking optimization guide. Why does this exist? For ****s sake.

Running AOKP build 36, stock, FC09 modem 15 hours running takes me down to 50% batt hour of screen time, constant crappy wifi connection in an area with crappy cell signal sync for everything but email and g chat is every 2 hours (weather and all that). Big thing to save batt for me was turning down my screen brightness. I was also getting crappy battery life till i let this rom install run the battery down to 5% twice.

flastnoles11 said:
Why must people post unhelpful comments such as the one above? I don't understand the logic there...
anyways since this was aimed at miui I get pretty good battery life with it... (3.5 hours screen on time) nyan v5 ftw! No special features... uv a lot (won't list my settings cuz every phone is different) and no oc... used to use jd but, it saves more battery if you just switch things off manually... really though until I flashed nyan my battery life was atrocious, but now just about on par with the peoples rom (4.5 to 5 hours screen on time!) Oh yeah, all this with the stock battery...
Click to expand...
Click to collapse
By no means was I saying never enable your 3g/4g.. but the fact remains that the single best way to conserve your battery life is to be smart about managing your connections. I.e. not leaving it on ALL day and to only turn sync on when your actually checking your e-mail.. be that through an app like juice defender or manually toggling. If that's not more helpful than what you posted (UV a lot and don't overclock??? Duh.) than my bad bro!

darkierawr said:
Oh my good golly gosh.
I just realized the best battery life I ever got was on DK28.
So take that. Let's go Frankenstein.
Click to expand...
Click to collapse
Something we can all get behind here... I remember I used to get 24+ hours on froyo w/o customs kernels. Le sigh..

ÜBER™ put's it pretty well.
ÜBER™ said:
1. CM9, although i think aokp does better.
Click to expand...
Click to collapse
-CM9 still seems cleaner, but AOKP seems better.
ÜBER™ said:
2. Samurai Kernel, although just about any other ICS kernel should help. The biggest thing that you can change between kernels is the Governor and I/O depending on these two will determine how the CPU runs and in effect will determine battery life. Conservative is just about the best for battery life. If you need slickness and not too worried about battery Ondemand. If you want the best of both worlds i Think Wheatly is a good compromise. Also I/O , Sio is "simple" but VR is flash based so it tends to be the best. Otherwise Noop/Deadline. Also voltage.. undervolting will help limit the amount of well voltage to the CPU. So the lower you can get it the better.
Click to expand...
Click to collapse
-Spot on.
ÜBER™ said:
3. Dont have tweaks i apply through CWM but i Run the V6 Supercharger, 3G turbocharger(optional), and the Kick Ass Kernelizer from Zeppelin.
Click to expand...
Click to collapse
-I don't use the supercharger, but I do apply the same oom ram mods. These help close unused apps when they exceed the applied limit. Based on my experience, it's kept apps under control.
ÜBER™ said:
4. I cannot stress this enough, Apps that say they save battery... run... which uses RAM and Resources... meaning its running trying to save you battery, Using battery. Which is stupid... and useless.
Click to expand...
Click to collapse
-THIS +9000! An app that spends all of it's time stopping other apps is wasting just as much "battery." I maintain, Advanced Task Killer, with NO, I repeat NO AUTOKILL. Set a widget on your home page, tap it occasionally to make sure everything is closed. Same effect as the built in task manager, but one single convenient tap.
ÜBER™ said:
5. I have two a 3500Mah and the stock 1.5 year old 1500mah.
Click to expand...
Click to collapse
-I use two stock 1500mah batteries and one 3500mah. My wife has the same. All are about 1.5 years old now.
ÜBER™ said:
6. Typically with 3 hours of display over a period of 15hours (1500 mah) and around 5 hours of display over a period of 22 hours (3500 mah). However this is on wifi, 3g would deduct these a pretty good amount if you have sucky speeds.
Click to expand...
Click to collapse
-These numbers are pretty much the same for me. I almost always average 3 hours display on the stock battery between games and internet. 5-6 hours on the 3500, but I'm pretty sure it's not reaaallly the 3500mah it claims to be... . I NEVER turn off wifi or 3G, but google autosync is off until I edit my contacts.

schnowdapowda said:
By no means was I saying never enable your 3g/4g.. but the fact remains that the single best way to conserve your battery life is to be smart about managing your connections. I.e. not leaving it on ALL day and to only turn sync on when your actually checking your e-mail.. be that through an app like juice defender or manually toggling. If that's not more helpful than what you posted (UV a lot and don't overclock??? Duh.) then my bad bro!
Click to expand...
Click to collapse
I don't turn off my connections at all and get great battery life... and seens how the op states don't say anything about disabling 3g or anything id say your comment was the least helpful on the thread... but at least you tried... don't get into a battle of witts with me, I'm afraid your unarmed...

flastnoles11 said:
I don't turn off my connections at all and get great battery life... and seens how the op states don't say anything about disabling 3g or anything id say your comment was the least helpful on the thread... but at least you tried... don't get into a battle of witts with me, I'm afraid your unarmed...
Click to expand...
Click to collapse
Firstly, I'm not trying to get into a pissing match with you. Its pointless. Secondly, the op makes no mention whatsoever of connection status. Thirdly, while you might get decent battery life w/o doing it.. I guarantee you'd do better if you did. Straight facts.
Edit: I am armed. With a small slide out keyboard.

Please follow the format specified by the OP. List the 7 items. Bickering in this thread will not be tolerated.
Thank you for your cooperation
Friendly Neighborhood Moderator
Sent from my PantechP4100 using xda premium

kennysvgp08 said:
Be sure to include:
1. ROM
2. Kernel
3. Tweaks that have been applied through ClockworkMod
4. Apps used to save life
5. What battery you use
6. How long your life lasts
7. Anything else that you think may help
Click to expand...
Click to collapse
1. CM9
2.ShadowKernel (I find nyan colonel to be a little more draining) SIO, conservative
3. None
4.System Tuner Pro configured to UV, under clock to 400mhz on screen off, to close apps that don't automatically restart themselves, configure "auto-kill" so its not as aggressive with killing apps that just stay on, and a few sysctrl edits that I honestly don't think make a difference.
5.stock epic 1500 mAh, my sprint store wouldn't give me an sgsII battery
6. 12-18 hrs depending on use, though it has definitely drained quicker
7.be easy on data! (There kennyG) turn off wifi when your not near your networks, turn off mobile data, Bluetooth, and autosync when your not needing it. (Unless you absolutely need PUSH email for your job or whatever though honestly as far as my job goes if its important enough for me to need the message immediately they will simply dial my phone number. Yeah I'm old fashioned.

- Cm9
- Shadow kernel
- No tweaks
-1800 D710 battery
- I get 15-20 hours depending on how much music I stream during the day.
- I got the biggest boost by using the profiles in CM9 to optimize my connections and syncing depending on where I'm at during the day. I have Wifi at work and home, so I have it toggle my data off during that time period and vice versa when I'm mobile.
Sent from my SPH-D700 using xda premium

Using AOKP with shadow kernel.
Best thing I did to help with battery life was to turn off all notification options in the FB app. And I set haxsync to download photos only when plugged in.
sent from a secret underground bunker

Poor battery life

http://i.imgur.com/HuW8tQu.png
I hardly used my device at all and in three days the battery had been reduced down to this.
I'm running stock and I'm using mkernel. What's the operating system doing when my device is idle to consume all that battery life?

Most likely location based services such as Google Now.
Sent from my Galaxy Nexus using Tapatalk 2

Battery life looks pretty good to me. Idle is not off. If you want better battery life, turn the nexus off when not in use.
Sent from my Nexus 7 using xda app-developers app

Would installing set cpu benefit me even though I run m kernel?

Macmee said:
Would installing set cpu benefit me even though I run m kernel?
Click to expand...
Click to collapse
No, and it's not recommended for this kernel. You probably have some application using the CPU. And keep in mind, that's over 3.5 days, so it's not too be worried about.
Sent from my SGH-I777 using xda premium

Not really sure what you are looking for.
Your tablet is configured differently (read: installed apps & their settings, never mind ROM & kernel differences) than the next person's, and those configuration changes alter the activity on the device and therefore the amount of power it consumes vs time. If what you observe is unacceptable to you, you need to drill down into the details to try and optimize things. But it really is impossible for anybody to guess (from a completely blind position on the other side of the internet) what might be the cause; if that is indeed anomalous consumption compared to some benchmark (pure stock, no market apps installed & a dormant gmail account?), the cause could be due to an unlimited number of different causes.
Perhaps you want to use that app BetterBatteryStats ($2.89) to find out about wake lock usage.
FWIW, my rooted stock 4.2.2 N7 grouper tab seems to discharge about 4% "overnight". Call that 10 hrs or so, so maybe I should expect 10% discharge per day while idle and unplugged. Your result seems to suggest 16%/day; but I've made no effort to dig in to things on my end of things - and besides: my results are irrelevant to yours as I no doubt use a different collection of apps than you and possibly different settings for the stock apps, too.
In my case the idle drain rate isn't a very compelling use case - I use the tablet every day, and when it is idle it is plugged into its' charger. If it should happen that it sat idle for a couple days, it's gonna be at 100% when I decide to use it.

Sv: Poor battery life
Macmee said:
http://i.imgur.com/HuW8tQu.png
I hardly used my device at all and in three days the battery had been reduced down to this.
I'm running stock and I'm using mkernel. What's the operating system doing when my device is idle to consume all that battery life?
Click to expand...
Click to collapse
And the problem is?
Around 6 days of standby, and you want to improve that?
If you want to improve that, turn off your tablet. I'm sure u can spare those 60 sec two times a day you turn on your tablet to check mail.

Keep WiFi off when not in use and you should see a great improvement. I use stock kernel and over that same time period my battery is about the same with about 3 hours screen on time. I only turn WiFi on when I'm actually using it as anything I need synced goes to my phone.
Sent from my Nexus 7 using xda premium

Try better battery stats and see what keeps your cpu from going to sleep state..With this way you can examine what drains your battery my friend.,.

Try turning off auto-sync. (Data usage settings)
Never keep wifi on when sleep (you will lose notification to chat programs, social network app notifications when sleeping)
Use wifi powersafe mode.(Wifi advance settings)
Turn off/disable unneeded background update/apps/extensions/services and flash a rom with minimal google stock apps)
Of course, check for apps that are currently consuming power if any. (App settings, internal application setting)
M kernel also defaults cpu max to 1500Mhz ; stock is 1200. M kernel also sets gpu to 446Mhz ; stock 416Mhz. Altho this numbers might seem minimal, it can affect your battery life considerably shall there be background processing or even right after you start using your device again despite minimally in your case. (Use n download trickstermod)
These might or might not help you in getting more standby time, try and experiment =>
If you are also looking for more screen on time and if you know and accept the risks, you can try undervolting the cpu, gpu and ram in trickstermod, you can also use rootdim to go lower the screen backlight further, but do not go lower than value 4/255 as that is 'off'. thankfully you can set it to not go below 4 in the in app settings before you play with it. My configuration pushed to 8hrs+ screen time without any gaming =>
Do note that li-ion/poly batteries need to drain over time for batt health reasons. They generally last longer if kept in the 20-80% range. Room temp can also affevt battery drain significantly, cold < 26C room drains the batt real fast; and so does hot rooms >34c due to temp & conductivity relationships (batt needs to suply more due to less conductivity in the circuits when hot)