OK here it goes, I have had horrible battery life since I have started rooting. Were talking about 1% every Minute to Minute and a half while the phone is active. Now to get to the details. It does not matter what rom. I just tried DJ05 roms, I have used DL30 and EB01 roms. I just installed Blackhole 4.3 and by the time I reinstalled voodoo and setup some apps I was at 89% when I started on a full battery. I have tried the BSTATS script about 10 times with different roms. Now I do get better life (though not great) with the AOSP roms. So any Idea's? I was thinking about attempting to get a new battery under warranty. Thanks.
Also, I always leave auto rotate and gps off.
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Legato525 said:
OK here it goes, I have had horrible battery life since I have started rooting. Were talking about 1% every Minute to Minute and a half while the phone is active. Now to get to the details. It does not matter what rom. I just tried DJ05 roms, I have used DL30 and EB01 roms. I just installed Blackhole 4.3 and by the time I reinstalled voodoo and setup some apps I was at 89% when I started on a full battery. I have tried the BSTATS script about 10 times with different roms. Now I do get better life (though not great) with the AOSP roms. So any Idea's? I was thinking about attempting to get a new battery under warranty. Thanks.
Click to expand...
Click to collapse
So you've actually ran the script in an emulator, not just flash in CWM right?
Also, have you charged it to 100%, reboot, charge to 100%, run script, let phone completttteeeely die, charge to 100% etc?
Yes I always run the script from the terminal emulator. I have never retired it with a reboot after the charge. I will run the process the way you described and see how it goes.
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Legato525 said:
Yes I always run the script from the terminal emulator. I have never retired it with a reboot after the charge. I will run the process the way you described and see how it goes.
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Click to expand...
Click to collapse
I don't know if it makes a difference. But I've always understood that it should be completely charged, and then completely depleted for the battery to best gauge its' capacity and life.
Deplete it after the script is run though?
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Related
My personal issue is SuperClean 2.4 does well on my phone but 2.5/2.6 die in under 8 hrs. Battery history under settings doesn't show any suspect 3rd party and I have flashed the battery stats script. Is there a cpu sleep state bug or something in the newer versions? I saw something on irc about auto-rotation errors.
Same issue here.
It's kinda bittersweet hearing that people are still on 75% after 12 hours of moderate use
Sent from my Fascinate
Electrodeath0 said:
Same issue here.
It's kinda bittersweet hearing that people are still on 75% after 12 hours of moderate use
Sent from my Fascinate
Click to expand...
Click to collapse
Adryn did something with the new rom/kernel. I'm on 2.7.1 nonvoodoo and am seeing some of the best battery life out of my device. I'm currently at 70% after 16 hours of on-time, with over 1 hour of screen time.
Just wait until his next release and your woes should go away (most likely)
Im on on sc 2.6 I just switched to voodoo last night. Im noticing significant improvement over non voodoo.
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Adryn said the weather app was constantly syncing on 2.6. Thus the battery drain. I trust he'll have it straightened out on the next go 'round.
bhfd64 said:
Adryn said the weather app was constantly syncing on 2.6. Thus the battery drain. I trust he'll have it straightened out on the next go 'round.
Click to expand...
Click to collapse
Wonder if he implemented the change on 2.8. Was not aware that in order to use the bstats script you have to run it in the terminal. I assumed you just ran it in CWM. By the way, was the battery data function in CWM ever fixed for Froyo?
I'm having the same battery issues. The phone won't sleep unless I do the GPS on/off then update position in maps/latitude. Then it fixes, but it doesn't stick -- have to do it each night on my wife's phone. Has there been any fixes for that?
Im having a ver similar issue as the op. several days ago i rooted and flashed from stock 2.1 to sc 2.6 voodoo. with nitrodark theme v 2.1. I noticed that since flashing to sc2.6 my batt life has been cut drastically. im at 83% batt life after about an hr or less with it unplugged. I used the phone to make a 2 quick calls (about 5 mins during one call and 10-12mins on the sec) nothing else. this is after i flashed the batt fix zip. All i did was flash the batt zip. i didnt push anything or do anything more other then flash batt zip file. Some ppl have talked about steps after flashing the zip but the initial directions only say to flash the zip. Can somebody plz help with this problem?
AuroEdge said:
My personal issue is SuperClean 2.4 does well on my phone but 2.5/2.6 die in under 8 hrs. Battery history under settings doesn't show any suspect 3rd party and I have flashed the battery stats script. Is there a cpu sleep state bug or something in the newer versions? I saw something on irc about auto-rotation errors.
Click to expand...
Click to collapse
Today is the first day my battery has seemed normal since I installed 2.6sc I'm thinking it must take time to recalibrate or something. It took like 4 days where my phone would die with little use in 12 hrs or less. Today completely different though.
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CPierce said:
Today is the first day my battery has seemed normal since I installed 2.6sc I'm thinking it must take time to recalibrate or something. It took like 4 days where my phone would die with little use in 12 hrs or less. Today completely different though.
Sent from my SCH-I500 using XDA App
Click to expand...
Click to collapse
I just came to the same realization. You really have to give a new version at least 24hrs to really see how it will behave. And that's assuming you installed and configured everything correctly. I will probably be able to get about a days worth of usage once it stabilizes. I no longer bother with JuiceDefender since it would screw up MMS messages.
I want to reiterate that the instructions for clearing your battery calibration info need augmentation. In a Terminal Emulator on your phone you have to enable su and then execute the bstats script (type su, then type bstats). It is recommended that you only run the script once your phone is fully charged and still on the charger. Don't expect miracles from this either. It is only meant for people who have royally screwed up the calibration tables i.e. they never wipe their data between flashes.
AuroEdge said:
I just came to the same realization. You really have to give a new version at least 24hrs to really see how it will behave. And that's assuming you installed and configured everything correctly. I will probably be able to get about a days worth of usage once it stabilizes. I no longer bother with JuiceDefender since it would screw up MMS messages.
I want to reiterate that the instructions for clearing your battery calibration info need augmentation. In a Terminal Emulator on your phone you have to enable su and then execute the bstats script (type su, then type bstats). It is recommended that you only run the script once your phone is fully charged and still on the charger. Don't expect miracles from this either. It is only meant for people who have royally screwed up the calibration tables i.e. they never wipe their data between flashes.
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Click to collapse
do you need to use terminal emulator and run commands in addition to the zip that the OP provided?
Undzis said:
do you need to use terminal emulator and run commands in addition to the zip that the OP provided?
Click to expand...
Click to collapse
Yes. This is what I did.
Flash the zip file in CWM
Open terminal emulator (I used ConnectBot) and connect to the phone.
You should see a $ prompt. Type su and press enter
Answer yes if prompted to grant superuser rights
Now you should see a # prompt. Type bstats and press enter
Type exit and press enter. Now back at $ prompt.
Type exit and press enter again to close the emulator
You are done.
This worked for me, although I have since been pulling the batterystats.bin file out of my previous nandroid backups (when battery life was good) and restoring them after I flash a rom. This seems to speed up the process of getting the battery calibrated. At least I think it does, ymmv.
i come from the captivate and a friend has a fascinate. he complains about battery life and i get up to 4 days. there has been much development on a couple roms for captivate that change wifi polling freqencies and kernels with lower kernelhz that matches userhz plus other mods and battery life on a few rom/kernel/modem combos with these mods is much improved. is there similar in the fascinate section? i want flash a stockish rom on his phone that is fast and has good batery life, no lagfix, over clock, undervolt is needed for the kernel. what are my options? note it can be 2.1 as the fascinate seems pretty smooth as is. ill wait for an official 2.2 for him as it is not my phone and i dont want too many indicators that it is non stock.
i know you dont have sources for froyo, cant seem to find eclair development like i expected.
Dani897 said:
i come from the captivate and a friend has a fascinate. he complains about battery life and i get up to 4 days. there has been much development on a couple roms for captivate that change wifi polling freqencies and kernels with lower kernelhz that matches userhz plus other mods and battery life on a few rom/kernel/modem combos with these mods is much improved. is there similar in the fascinate section? i want flash a stockish rom on his phone that is fast and has good batery life, no lagfix, over clock, undervolt is needed for the kernel. what are my options? note it can be 2.1 as the fascinate seems pretty smooth as is. ill wait for an official 2.2 for him as it is not my phone and i dont want too many indicators that it is non stock.
i know you dont have sources for froyo, cant seem to find eclair development like i expected.
Click to expand...
Click to collapse
just so you know samsung has released source code for froyo. If I were you id wait as there is a community rom being worked on at the moment. Also if you look in the dev section there a few different custom kernels built from source. Im personally using a kernel thats uv by 100. Also theres a new radio out ecO1. look for that to help out in the battery department.
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So, I flashed back to stock the other day and used it for a bit. I noticed that the battery life seemed better. So after some tests I ran, I find I get about 3 1/2 hours on super clean, 4 hours on aosp and 15 hours on stock. I ran them from full to shut down with no activity other that screen always on and a live wallpaper. I even deleted the bstats on super clean and got the same result almost to the minute. Any ideas?
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This is very interesting. We are always trying to remove limitation on our phones OS while those limitations must be there for some reason.
Dunno anything about this. I always turn off most services on my galaxybs running darky o.t and i have pretty reasonable bat. life although its.kind of.irregular.
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3.5 hrs sounds about right for me for superclean, too. I read the news every morning and by the time I finish (~1-2 hrs) I'm getting the low battery beep. It's absurd. Maybe it's time for me to go back to stock. I love SC 2.92 but if it means charging a phone all day or using it all day, I'd rather use my phone.
How are the hacked dj05 and DL09 roms for battery life? Does anybody still have those files lying around?
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I tried dj05. Was not much better. But I was coming from super clean, I should try it coming from stock and see what happens.
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I use SC and am on it all the time.... Music, internet, texting, facebook, etc... I normally get approximately 10 to 12 hours...
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Second on superclean.
Using EB01 baseband, eb16 kernel, sc 2.90. Battery is 4+ hours display on & 12 or so hours before I charge it, even with gps, 3g and wifi on all day. Just sitting, it is typically good for 24 hours or more, but I seldom let that happen. It is similar to what I got on eclair. Maybe a little worse, but totally worth having the improved OS.
Swyped grumpily from my advertised as "can be upgraded to Android 2.2" device
When I was still running a rooted 2.2.2, my phone idle and cell standby usage would both read about 40% each when i left my phone on overnight. This resulted in only 10% total drain once I woke up in the morning. Now with the prerooted and debloated 2.3.3, my phone idle is reading 75% usage while the cell standby reads 15%. Now when I wake up, my phone battery drops nearly 40%. Does anyone have a similar issue or know why this happens?
I followed the debloat guide for the prerooted GB. Maybe the system is trying to reach one of the frozen apps to no avail?
lostconfuzed said:
When I was still running a rooted 2.2.2, my phone idle and cell standby usage would both read about 40% each when i left my phone on overnight. This resulted in only 10% total drain once I woke up in the morning. Now with the prerooted and debloated 2.3.3, my phone idle is reading 75% usage while the cell standby reads 15%. Now when I wake up, my phone battery drops nearly 40%. Does anyone have a similar issue or know why this happens?
I followed the debloat guide for the prerooted GB. Maybe the system is trying to reach one of the frozen apps to no avail?
Click to expand...
Click to collapse
I already received the OTA -- I was one of the soak testers. And unfortunately, this doesn't have anything to do with root or anything you have frozen. I am experiencing the same problems. Battery life is horrible now. I am almost considering contacting Verizon and moto on concerns of the update breaking my phones functionality.
I have raised awareness of the battery problems on the soak forum. Hopefully we will get a response.
Also, I'm using the extended battery and have a hard time getting through an 8 hour work day with light usage.
Sent from my DROID X2 using Tapatalk
I am also noticing the faster battery drain
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Try a battery calibrating app. Its possible that the update deleted the battery cached and now it needs to be re-calibrated. I've been getting great battery life, so its not something I've looked into thoroughly.
My phones been unplugged for 12hrs and is at 70 percent and I have data sync running 24/7.
And I also have 250 user apps installed and not even deblurred
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LancerV said:
My phones been unplugged for 12hrs and is at 70 percent and I have data sync running 24/7.
And I also have 250 user apps installed and not even deblurred
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Click to expand...
Click to collapse
hell i wish i could get all that my battery drains fast
My battery is fine as well I actually think its somewhat better ...
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Steroid Droid said:
My battery is fine as well I actually think its somewhat better ...
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Click to collapse
+1 Mine has been great since the update
Steroid Droid said:
My battery is fine as well I actually think its somewhat better ...
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Click to collapse
+1
I've been using my phone for internet for 3 hours battery shows 70%
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It's funny, I usually don't have these odd problems, but I'm getting the same exact thing. Awful battery drain. It could be that I have removed a certain service/app while I was debloating. Gonna try to SBF or a different ROM.
My phone works fine and has the same battery drain when it is on. The thing that has changed is that my phone idle has been eating up a 5 times more battery than before.
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redwingfaninnc said:
Try a battery calibrating app. Its possible that the update deleted the battery cached and now it needs to be re-calibrated. I've been getting great battery life, so its not something I've looked into thoroughly.
Click to expand...
Click to collapse
Tried this yesterday, but it did not appear to help any...
My battery life has been great since GB. A lot of these "issues" people are having with the GB update are isolated issues. Could be due to not doing a data/factory update or 3rd party apps. If anything I noticed phone idle using more of a percentage because everything else is actually using much less battery life now.
Wish everyone would stop including pre-rooted update when they have issues with this GB build. All P3Droid did was pre-root it for us, he did not mod it. It is otherwise a stock update (soak test actually).
I am not calling anyone out specifically, it just seems to be a trend. I know you guys aren't trying to blame him or any other true developer who is trying to let us get the most out of our DX2s. Just an observation.
Pre-rooting the update is by definition a "mod"
Anyway im also curious if some of the bloat removal is causing this. I was not de bloated on 2.2 but I did on2.3 and I am draining much faster. I used to get 17+ hours easy, now I barely get 9.
Sent from my DROID X2 using Tapatalk
One thing we found on the fascinate that had an effect on battery performance was the battery state prior to flashing any rom. Better performance & reporting was noticed if the flash was made on a full charge. Seemed to smooth out the calibration issues found the first few days after changing/updating roms. We also did some bump charging occasionally to top off the charge.
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My phone idle usage was at 75% the other day but over the past couple days it has declined. Its at 56% now. Idk if there's any reason why its declined but its gotten better
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moto trolls?
My battery life is no different than with froyo. I websurf ALOT at work. And whats this about de-bloated? after I got gingerbread up and running it was just as bloated as expected. The rooted unmodded rom I downloaded didnt seem to have any bloat removed. I did that all myself after the fact and still my battery lasts just as long as before.......
Yeah I've noticed that too. Helps me when I power button + sleep my phone so it sleeps rather than idling.
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If you're experiencing battery drain, you probably just have some bad data from froyo lingering. I bet a complete sbf, factory reset, root and bootstrap, flash rooted gingerbread and then don't use titanium backup or use it but only restore USER APPS, NOT APPS+ DATA. Will fix it.
It's A universal thing for any android phone, if you don't make sure you have a clean instal things like battery drain will happen.
Incidently I'm getting slightly better battery life.
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juhde said:
If you're experiencing battery drain, you probably just have some bad data from froyo lingering. I bet a complete sbf, factory reset, root and bootstrap, flash rooted gingerbread and then don't use titanium backup or use it but only restore USER APPS, NOT APPS+ DATA. Will fix it.
It's A universal thing for any android phone, if you don't make sure you have a clean instal things like battery drain will happen.
Incidently I'm getting slightly better battery life.
Sent from my DROID X2 using XDA Premium App
Click to expand...
Click to collapse
I did a full SBF to 2.2.2 and then rooted and then installed GB. I start the whole process again later tonight to see if I can get better results
So i have a verizon fascinate and am currently running cm7. (first tried the stable release but niw a nightly). Im eeally liking cm, but since i got it my battery life is garbage. Basically the drain seems to come from either the android os sercice or cell standby. Whenever i leave my phone inactive for a while, when i wake it up the battery has dropped a lot and tge phone is very warm. I have been modding this phone for a while, but im no android programmer. Purely based on the forum searchi. G ive done on the issue, it seemsblike cm7 has an issue with my modem or radio.
Extra info: my 3g/2g signals seem fine (always 0% time without signal). Wifi connectivity seems fine. Im also running glitch's kernal altho the problem has persisted with and without it (i did do a kernel cleaning first). I used the "go from anything to jb vanilla" guide cuz i was having issues switching to mtd at first (sry dont have a link rite now but it was on xda) . I get occassional force closes, but not really a problem. When i did a titanium back up, the very first time i flashed cm7 i Did restore system settings, but i did not do that every time since then. Ive done a fresh flash of the stable mod around 3 times trying different stuff, but this one is niggtly as i said, and each has had this issue.
If looked around a lot, and wgile this seems common, no one has posted a consistent solution or explanation to the problem, so thats what im looking for.
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Hellomello13 said:
So i have a verizon fascinate and am currently running cm7. (first tried the stable release but niw a nightly). Im eeally liking cm, but since i got it my battery life is garbage. Basically the drain seems to come from either the android os sercice or cell standby. Whenever i leave my phone inactive for a while, when i wake it up the battery has dropped a lot and tge phone is very warm. I have been modding this phone for a while, but im no android programmer. Purely based on the forum searchi. G ive done on the issue, it seemsblike cm7 has an issue with my modem or radio.
Extra info: my 3g/2g signals seem fine (always 0% time without signal). Wifi connectivity seems fine. Im also running glitch's kernal altho the problem has persisted with and without it (i did do a kernel cleaning first). I used the "go from anything to jb vanilla" guide cuz i was having issues switching to mtd at first (sry dont have a link rite now but it was on xda) . I get occassional force closes, but not really a problem. When i did a titanium back up, the very first time i flashed cm7 i Did restore system settings, but i did not do that every time since then. Ive done a fresh flash of the stable mod around 3 times trying different stuff, but this one is niggtly as i said, and each has had this issue.
If looked around a lot, and wgile this seems common, no one has posted a consistent solution or explanation to the problem, so thats what im looking for.
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Click to expand...
Click to collapse
You could flash jt's vanilla gb rom. That has good battery life.
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Plus do you have an overclock?
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I have had the standby battery drain on every CM7 version and Kernel tried so far including 7.1 stable,7.0 nightlies,JT's Vanilla,and PoolParty. It's even worse if I shut phone down and don't plug in. It will drop 50 to 75% overnight with phone not on?
Has done it with undervolting,overclocking,and voltage control not even installed. This is first time I have seen others having similiar issues.
I think this is a known issue for all MTD roms on the fascinate, if I'm not mistaken.
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TheBDub said:
I think this is a known issue for all MTD roms on the fascinate, if I'm not mistaken.
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Click to expand...
Click to collapse
I lose only 5% to 10% overnight on CM7 never really notice how much on MIUI cause I never ran it long enough. I guess every phone would behave differently for MTD's or maybe you have an app or mulitple ones that refreshes frequently(Fancy Widget comes to mind).
Well that really sucks, because i do enjoy cm7. But this also means if i go back to a touchwiz configuration like stock dl09 i shouldnt have these issues right?
But before that, has anyone who had these issues tried anything (ie kernels or maybe standby mode power conservation setting, etc... ) that have at least noticeably improved your battery life? Right now mines pretty unbearable (im talking 8hrs while on but totally inactive), but if i can get it up a little i might b able to manage.
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I am also experiencing poor battery life. I just flashed 7.1.0 yesterday and absolutely love it. Was using com rom for a few months, but a friend said to try out cwm 7. I used to get about 6 - 8 hours of Pandora while at work and today I only got about 4 before my phone shut off. I'm going to try completely killing battery and charge with phone off tonight an see if it's any better tomorrow.
Any other suggestions? I'm not a noob when it comes to custom roms and flashing (I used to flash the **** out of my G1) but there may have been something I over looked when switching to cwm7. I wiped everything a few times before flashing including battery stats and dalvic.
My battery life is actually really good. Running latest nighty, undervolted -75 across the board,stock kernel, and no overclocking.
Just can't figure why I lose 50-75% of battery overnight when phone is shut down and not charging?
I have the same issue with CM7.1, turning phone of at 80% battery at night to find it at 25% at morning
Is there knows solution?
Hello been having some annoying problems with the phone since i rooted it a while back. I used HTC unlock method and followed the tutorial for hboot 1.5 immediately I got horrible battery life. I had twrp if that matters, aside from the horrible battery life. I'd get a lot of random reboots. I replaced battery battery still sucked. I did the hboot downgrade battery still sucks now, and random reboots started bad now. I've used miui rom a couple of senses ice cream they all ear my battery I'm full charge at 630am and by ten I'm getting the low battery notification, I have tried almost every from and non have worked. Is it time to bash this phone against a wall? Its the only android phone I've had that has done this. I'm a Android user since the g1 btw. Which had horrible battery life but in comparison it beats this phone. Any suggestions will be appreciated.
Sent from my PG86100 using XDA
are you still using twrp and also will need some more details like are you running a custom rom and kernal and what rom and kernal are you using this info needed
I'm on clockwork now. I've never flashed a kernel so I pretty much use the kernel the rom comes with. I'm currently using digitalhigh's miui build and never flashed a kernel have never flashed one might this be the problem? If so where do I search?
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Kernel on it right now is 2.6.35.14-AngryDragon-1.0 its digital highs kernel.
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battery at 28% now I was at 70 when I posted this, loaded up two pages Max I wonder if the phone is just going out
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Sounds like the kernal your using is the cause of the battery drain I wonder is it clocked above 1.5 if it is there's your problem
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And get rid of cwm and use 4ext recovery instead
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Sorry for the newb comment I'm about to make ext4? Sorry again lol
Sent from my PG86100 using XDA
Do you know what clock speed you are running at?
This may seem like a silly question but what kind of case is your phone in, have you left your phone in a location that may have heat damaged your battery. Have you tried another battery and experienced the same rapid discharge?
Its a freaking meeting of the half minds in here OP excluded! Recovery is not the Culprit of the battery drain!
The culprit of the battery drain has to do with the Kernel for instance Anthrax Kernel is awesome but will drain your battery quicker then ****!
@OP I suggest you try meanrom it has a very good battery life and Mikeyxda is constantly trying to make it better and you have your choice between four different Kernels to choose from You have the new one (I dont remember the name) Ziggy's, Anthrax's and stock. I prefer Ziggy's and I get good battery life with it.
From what I have seen most if not all ICS roms are using Anthrax! As I stated before Anthrax Kernel in sleep mode drains your battery at 2% an hour so you can imagine how much it uses when its awake.
Dont get me wrong anthrax is blazing fast!
I assumed recovery had nothing to do it. Will try meanrom and report back.
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Flashes ex4 recovery. It's sweet. And latest meanrom. It has dodava kernel. Battery still sucks. But ill give it a day to settle in.
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Classic
sent from my EVO 3D s off using xda premium
Batt life the same
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Give up :'(
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How much screen on time? Do you have good signal? Are you leaving 4g on all the time? With constant use, it is normal to only get a few hours, especially with low signal or 4g.
Could be a rogue app. I like better battery monitor (available on xda) and bad ass battery monitor (in market) to see what is draining my battery.
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urquidezj said:
Batt life the same
Click to expand...
Click to collapse
I'm running MeanRom w/ dodava and it is BY FAR the best batt life i've had on this phone to date. On light usage days I can go all day (12+ hours) and still have >75% left. I also use Juice Defender Ultimate to auto-disable data/gps/etc on screen-off but from what you're saying it sounds like your batt life is freakishly bad. I don't think it's even a wakelock issue, you must have a runaway application eating 100% cpu all the time or something severely broken in your OS.
I'm guessing you didn't do a full wipe of the phone before flashing MeanRom?
Also, after flashing a new kernel/rom your battery stats may be messed up and you may need to recalibrate before it's accurate again:
I use the app "BatteryCalibration" by NeMa (free in Market).
Just follow the instructions in the app.
So... You need to flash it again but this time:
1.) Do a full wipe by flashing one of those Wipe utils first. There's a link to one on the MeanRom page as MikeyXDA mentions it. DO NOT Reboot after doing the wipe but proceed immediately to install the MeanROM zip. This will wipe out any data that doesn't sync to google. Your SD card will not be erased but everythign else will.
2.) Do be extremely selective about re-installing your applications. The Android system may have gotten FUBAR'd from flashing of different ROMs on top of each other and that may be the cause and would be fixed by #1 above but it's just as likely you've installed some very bad application(s). When you open Google Market for the first time after a clean wipe and flash it will start re-downloading everything you had installed before. STOP it from doing that. Even if you have to pull the batt out or whatever. Next time you open it, it won't automatically start installing everything but will let you choose them one at a time. Install only the bare minimum apps at first and check an App Killer and CPU monitor like SystemPanel Lite to look for high CPU usage and kill any stuck apps. Each day maybe you can add a few more apps and this way you'll know when your batt life goes to hell again which app it was that sent it there.
Anytime you switch from one ROM to another you should do a full wipe. The only exception is when maybe flashing a newer version of the same ROM on top of an older one. (i.e. Flashing MeanRom 4.3 on top of 4.1 or something.) I've noticed that after kernel upgrades even though my battery often needs to be recalibrated.
I unplugged my phone 3+ hrs ago, lightly checked it a couple of times this morning and glanced at it a few times while writing this and I'm still at 96%. I'm running MeanRom 4.1 at the moment but will upgrade to 4.3 tonight maybe.