Develop Bugs

Why is my battery life so bad?

I'm running my tmo G2 on cm7 clocked at 1.2, wtih a off screen profile. I don't have many apps syncing, but the ones that are are syncing at least every 2 hours. My cell standby is taking a huge chunk. How can I prevent that? My battery life seems to be terrible, and my percentages can drop enourmously in only a matter of twenty mintues. What causes cell standby? Any ideas?
Sent from my HTC Vision using XDA Premium App

Hey,
Cell standby is the time that your phone spends on screen off while being connected to the cell network. Try flashing a newer/updated radio and see if that helps improve your power management by the wireless cell signal.

How do I know what radio to flash and how do I do it? Thanks for your reponse.
Sent from my HTC Vision using XDA Premium App

PatrickHuey said:
How do I know what radio to flash and how do I do it? Thanks for your reponse.
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=970809
Theres a pretty useful (although not necessarily perfectly complete) list of radios.
To install, follow the guide there. Basically just download the file, rename it to 'PC10IMG.zip', put on the root of your SD card and boot into the bootloader (NOT CWM Recovery). and it will recognize the .zip and accept the update and let it install. Be sure to note before you do this what radio you're currently on and make sure there is a download available so you can go back to it if need be.
Before you do this, its best to look at all other options to see what could be draining battery such as wonky apps, or unused radio connections, or wakelock issues.
Fwiw, I'm on CM7 too and my 'Cell Standby' is generally in the 30%-40% range in my battery stats, but I get very respectable battery life. You should look into other causes of your battery life as well before just jumping into new radios.

You need to set more profiles with setcpu. Low battery is a good one but, yeah u need the newest radio. Also need taskiller. Auto kill while phone is off. My battery life is supreme
G2 w/ meXdroidMod GingerMex Ghost Chilli

GhostZini said:
You need to set more profiles with setcpu. Low battery is a good one but, yeah u need the newest radio. Also need taskiller. Auto kill while phone is off. My battery life is supreme
G2 w/ meXdroidMod GingerMex Ghost Chilli
Click to expand...
Click to collapse
Don't recommend task killers. They're worse for battery and performance, especially in 2.3 (GB has good RAM management), than not running them. They spam kill necessary tasks and don't let background processes properly run out.
If you want to weed out the rogue processes, download Watchdog Lite and see which processes are using the most CPU and RAM and try getting rid of the bad ones.

You must be kidding. I use Taskiller, and its golden. My phone is fast, no lag, and everything works speedy when i need it. It autokills what i want when phone sleeps, has kill button widget to kill things constantly tryin to run. You freaking crazy.
G2 w/ meXdroidMod GingerMex Ghost Chilli

I had my phone running all day at 1.2ghz and used it heavily from 7am-3pm at work and because of setcpu profiles and my taskiller, i never dipped below 40% range. You need to check yo facts about this ish.
G2 w/ meXdroidMod GingerMex Ghost Chilli

GhostZini said:
I had my phone running all day at 1.2ghz and used it heavily from 7am-3pm at work and because of setcpu profiles and my taskiller, i never dipped below 40% range. You need to check yo facts about this ish.
G2 w/ meXdroidMod GingerMex Ghost Chilli
Click to expand...
Click to collapse
You need to settle down. Your claims of battery life with "heavy usage" are susceptible to an unquantifiable number of variables other than task killer usage.
There is no reason to use a task killer with 2.3, I don't think you'll find anyone familiar with how 2.3 operates that thinks a task killer is better. I haven't seen a person promoting task killers heavily since 2.1.
I think that everyone has their own way of setting up their phone, and whatever works for you works for you, but I don't think that a task killer is the way to fix OP's issue. Identifying problem apps etc is.

How can you argue that the processes that run in the background shouldn't be killed. They are a constant drain on power levels.
G2 w/ meXdroidMod GingerMex Ghost Chilli

GhostZini said:
How can you argue that the processes that run in the background shouldn't be killed. They are a constant drain on power levels.
G2 w/ meXdroidMod GingerMex Ghost Chilli
Click to expand...
Click to collapse
I think El Goog can argue better: http://android-developers.blogspot.com/2010/04/multitasking-android-way.html
Sure Task killers give you the sense that you are controlling the variables, but what's to say that those apps don't start again without you knowing? Android was built with this in mind and rather than allowing the processes to keep running, they are placed in a low level state of hibernation until required. They are ultimately killed off automatically when Android calls for it. It's really down to personal preference and there really isn't a need to get so defensive about it. It's just the way it was designed.
@OP: Give us a list of the apps that you have installed since observing your battery limitations. Perhaps there is an app in there that you use that is set up slightly incorrect or is a known resource hog.

i agree taskillers should be used.. but i do also agree some apps run inthe background or stay running when you exit them or don't fully exit. this is why i use fast reboot. basically kills all the apps.. with cm7 i actually have fast beboot for long press on my search button.. since i never really use my search button.. works like a charm. when im done playin a game, interet or facebook mostly i'll use it to kill everything.. works great. and also if you don't use 3g\4g then you'll notice battery life is amazing.. i have an extended battery chichi one, and dont use 3g.. i get off work, texting all day and have beluga up and open all day.. about an half hour of browsin internet. 30\60 minute of calling.. and i usaually am around 60 at the end of the day on the worst... just my 2cents.

Task killers may seem like they do their job, but these newer versions of android have a built in task killer. Just Google it and get your answer. This is a good discussion though. I mean what else is sugghested? I don't believe I have stuff runnikg in the background. What are some your guys profiles? Or tips?
Sent from my HTC Vision using XDA Premium App

I've got the usual. I mean I use plume and that syncs every 2 hours. I have lookout running in the background without GPS on. So I don't think that it could be. Beautiful Widgets syncs every 3 hours for weather. The battery is just consumed by the cell standby. I want to decrease that.
Sent from my HTC Vision using XDA Premium App

Athrun88 said:
I think El Goog can argue better: http://android-developers.blogspot.com/2010/04/multitasking-android-way.html
Sure Task killers give you the sense that you are controlling the variables, but what's to say that those apps don't start again without you knowing? Android was built with this in mind and rather than allowing the processes to keep running, they are placed in a low level state of hibernation until required. They are ultimately killed off automatically when Android calls for it. It's really down to personal preference and there really isn't a need to get so defensive about it. It's just the way it was designed.
Click to expand...
Click to collapse
Thanks for supporting my theory with the link. Exactly what I needed. I do agree he needs to not be so defensive about it lol.
Task killers use up RAM and CPU to sit there and spam kill apps that keep restarting. They will keep restarting because they are trying to finish tasks they're assigned to do. If you just let them finish running, they will complete the process, and sit in RAM, no longer using CPU. At idle, my background processes are using 1% of my CPU and I have 75% of my RAM available. There is no need to run a task killer to stop processes. I used to be an avid task killer user, until I realized that it is causing more harm than good.
PatrickHuey said:
I've got the usual. I mean I use plume and that syncs every 2 hours. I have lookout running in the background without GPS on. So I don't think that it could be. Beautiful Widgets syncs every 3 hours for weather. The battery is just consumed by the cell standby. I want to decrease that.
Click to expand...
Click to collapse
So what kinda numbers are you talking about here? How much battery is cell standby taking up? and how are your battery life numbers with a normal day's use?
The only thing I could generally recommend without knowing more is dropping your clock down to 1ghz. I use these profiles:
Battery <100% 1017 max / 245 min ondemand
Battery <10% 768 max /245 min conservative
Battery <5% 368 max / 245 min powersave
Screen Off 368 max / 245 min ondemand (I sometimes have wakeup issues if I set to 245max or use the powersave scaling)
Temp > 42*C 768 max /245 min (necessary for any OC I think, good to stop your phone if its getting towards overheating)
Also, using a standard screen brightness lower than 100%, or just autobrightness can help. The best way to cut down on cell usage is an app like Juice Defender, which turns off your 3G data when the screen is off (and enables every 15min (or less/more) for updating). This is really useful if you don't turn your phone on/off every 1min like I do for text messages (turning data on/off often causes more drain than just leaving it on). Unfortunately, Juice Defender isn't updated to work on 2.3 yet .

PatrickHuey said:
I mean what else is sugghested? I don't believe I have stuff runnikg in the background. What are some your guys profiles? Or tips?
Click to expand...
Click to collapse
Honestly, it's trial and error. Try underclocking back to 800MHz if you have OCed and see if that helps at all. If it is in fact just cell standby that is sucking your power dry, then backup your phone with NANDroid and get the latest radio. Flashing radios are less complicated than ROMs since it is easy to flash an older one over a newer one if you change your mind.
I believe a list of radios was posted earlier but I will try to track down a larger list for you.
Good luck!

Athrun88 said:
Honestly, it's trial and error. Try underclocking back to 800MHz if you have OCed and see if that helps at all. If it is in fact just cell standby that is sucking your power dry, then backup your phone with NANDroid and get the latest radio. Flashing radios are less complicated than ROMs since it is easy to flash an older one over a newer one if you change your mind.
I believe a list of radios was posted earlier but I will try to track down a larger list for you.
Click to expand...
Click to collapse
Partially true.
Nandroid backups don't backup your radio, only your ROM. Flashing your radio is completely independent.
But yes, it is easy to flash back and forth between radios. Just be careful that you flash proper radios and have an escape plan to go back to your previous one (aka have your old one in a flashable form also) in case the new one doesn't work.
Here's a list of radios for the G2 I recently used: RADIOS. But as I said before, I think there can be other issues other than radios at play here.

RAM will use the same amount of power regardless if it is 100% full or 5% full. Task killers are useless, linux can manage its own memory just fine.

daganb said:
RAM will use the same amount of power regardless if it is 100% full or 5% full. Task killers are useless, linux can manage its own memory just fine.
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Click to collapse
Exactly. The link previously posted explains it pretty well, but here is another good one:
http://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
Keeping processes in memory is not going to kill your battery life. But I would think that using up CPU cycles to kill the process unnecessarily, only to have it respawn (more CPU cycles) would actually consume more battery then if you left it alone.
I haven't seen any convincing argument that 3rd party task killers should be used (and solid arguments against them). They are mostly just a vehicle for the developers to take your money.

martonikaj said:
Partially true.
Nandroid backups don't backup your radio, only your ROM. Flashing your radio is completely independent.
But yes, it is easy to flash back and forth between radios. Just be careful that you flash proper radios and have an escape plan to go back to your previous one (aka have your old one in a flashable form also) in case the new one doesn't work.
Here's a list of radios for the G2 I recently used: RADIOS. But as I said before, I think there can be other issues other than radios at play here.
Click to expand...
Click to collapse
Ahh, I didn't know that! Learning something every day

Battery life is horrible, yet not much is running?

I have my cpu settings on 245 245 powersave when the screen is off, yet I'm still getting horrible battery. I use my phone extremely lightly, maybe once in a while to listen to music. Check my emails, chat every so often. I use to get 48 hours with light usage. Seems I cant figure what is causing my battery to drain. I have a craigslist app, I had one search enabled so I deleted that to see how much it will effect. Does google talk drain that much? In the past it was fine. My usage shows the 2 main ones are cell standby and phone idle. Any tips on finding out what exactly is draining my battery? Im running CM 7.0.2??, latest stable, forgot. Koni's was the same. I thought maybe sense drained the battery, but it doesnt seem to be the problem.

Click the link in my sig and run that battery conditioning routine for one. What kernel are you using?
And dump SetCPU. Useless app, seriously...

1. Update to the latest stable version...7.0.3.1 released this morning.
2. Google talk could be draining, but I've never used it
3. Perhaps install it under a clean install and see if that helps.

Get tge system panel app. It'll show you what apps and everything that's eating your battery. Does the kernal your on perflock unlocked for over /under clocking cause if it isn't setcpu doesn't work.
Sent from my PC36100 using XDA Premium App

HipKat said:
Click the link in my sig and run that battery conditioning routine for one. What kernel are you using?
And dump SetCPU. Useless app, seriously...
Click to expand...
Click to collapse
+1 SetCPU is great for Sense ROMs, but not necessary for CM based ROMs.

looks to me like you were in pretty crappy coverage. that makes the phone work hard. it's justifiable that you'll have a lot of battery drain then, even while sleeping.
you can greatly reduce this by:
1: upgrade to newest cm7
2: flash a custom kernel. may i reccomend tiamat 4.0.1?
3: put your governer on smartass, and uninstall setcpu. smartass does it better.
4: use a bsm from viperboy. they decrease voltages. work almost too well.
5: USE JUICEDEFENDER! this will save a ton of battery in low coverage, because it turns off 3g when screen is off. this still lets you get calls and texts, but with mobile data off, your battery will last much longer while sleeping.

what prl are you on?

[Q] How to get longer battery life on Deck's gingerbread-evo-deck 1.2.1 Rom

I was wondering is someone can help me. I've been using Deck's ROM's for the HTC EVO 4G for some time now and I hear about all these guys getting 20-30 hrs of battery life. I'm currently on 1.2.1 and have never got probably more then 11 hours out of my battery life with heavy or mederate usage. I've updated all my radios, wimax, etc....I've tried different kernels, I've installed vipermod and undervolted, I have CPU profiles. I've installed a new 3F3D driver. I've tried the wake lock fixes and still nothing has changed. Am I missing something here to how these other guys can get that performance out of their batterys. I'd like to post this directly to his thread but this is my first post and I guess I need at least 10 posts. I'm a bit of a noob but can hold my own.

I run decks with tiamat kernel 4.0.5 and I get outstanding battery life. Give this a try then let me know how it works out. Check your accounts to see if anything is synching that's insignificant. Then check your apps update frequencies. Lastly, turn off all of the haptic feedbacks, animations, and effects. Live wallpapers kill a lot of battery too. You might also want to try enabling and disabling auto brightness to see which is more energy efficient. If your overall goal is great battery life, then a lot of the bells & whistles are pointless.
It is nice to be important, but it is more important to be nice.

BluInception3 said:
I run decks with tiamat kernel 4.0.5 and I get outstanding battery life. Give this a try then let me know how it works out. Check your accounts to see if anything is synching that's insignificant. Then check your apps update frequencies. Lastly, turn off all of the haptic feedbacks, animations, and effects. Live wallpapers kill a lot of battery too. You might also want to try enabling and disabling auto brightness to see which is more energy efficient. If your overall goal is great battery life, then a lot of the bells & whistles are pointless.
It is nice to be important, but it is more important to be nice.
Click to expand...
Click to collapse
I've tried tiamat 3.3.7, 4.0.5, and 4.0.6 and have got the same results with all three. I've tested each and one of these over about a week period. Currently I am trying SavagedZen 2.2.1 and up til this morning it hasn't changed much. I've took off all auto syncs. All haptic feedbacks, animations, and effects have been turned off. Never use live wallpapers and have read that lighter wallpapers will conserve battery. Right now I have auto brightness off and down to about 35-40%. I did however just checked off data enabled about 2 hrs ago and seem to have got better battery since. So far I'm at 82% with about 4 hours of moderate use. (mostly texting and surfing the web). I didn't know if there was any other tweaks internally that I'm missing or if it's more of a puzzle with what combinations to use.

Just saw my background data was enabled. I unchecked that as well. We will see how this goes I guess.

It seems like it's definitely data related. I downloaded skype from one of the forums strait to the phone and my battery percentage went from 79% to 68% just for the duration of the download. Is this common?

Do you use an SBC kernel? Have you whipped battery stats in recovery? Have you tried using the kernel governors (smartass, powersave, conservative) without setcpu?
It is nice to be important, but it is more important to be nice.

amase005 said:
It seems like it's definitely data related. I downloaded skype from one of the forums strait to the phone and my battery percentage went from 79% to 68% just for the duration of the download. Is this common?
Click to expand...
Click to collapse
No, not with a rom as good as Decks.
It is nice to be important, but it is more important to be nice.

BluInception3 said:
Do you use an SBC kernel? Have you whipped battery stats in recovery? Have you tried using the kernel governors (smartass, powersave, conservative) without setcpu?
It is nice to be important, but it is more important to be nice.
Click to expand...
Click to collapse
I have used kernels with SBC and without and haven't seen much difference besides the initial 10% loss of battery. I usually I wipe cache, Dalvik cache, and battery stats everytime I flash a new ROM in recovery. I usually do a factory restore too. I've used smartass and savaged zen as governers as well. Currently I'm using savagedzen governer with a max at 1036 and a min at 245. I also calibrate the battery when i flash a new ROM. Currently I'm standing at 60% battery with about 7hrs and 37 min on battery. Probably the best battery life I've seen. I'm still seeing massive drains when I use 3G. I was just on xda forums on my phone for about 5 min. and the battery went from 65% to 60%. If I turn 3G off it stands idle for awhile.

I'm scratching my head trying to think of what will help. You probably won't like this, but when my rom has me stumped with a problem, I wipe and start over. Maybe an extended battery is the answer? They are dirt cheap for the EVO now.
It is nice to be important, but it is more important to be nice.

Yea I was thinking about an extended battery as well. It seems like taking 3G off does wonders for the battery. Are you keeping yours on or off to get great battery life?
Sent from my PC36100 using XDA Premium App

amase005 said:
I have used kernels with SBC and without and haven't seen much difference besides the initial 10% loss of battery. I usually I wipe cache, Dalvik cache, and battery stats everytime I flash a new ROM in recovery. I usually do a factory restore too. I've used smartass and savaged zen as governers as well. Currently I'm using savagedzen governer with a max at 1036 and a min at 245. I also calibrate the battery when i flash a new ROM. Currently I'm standing at 60% battery with about 7hrs and 37 min on battery. Probably the best battery life I've seen. I'm still seeing massive drains when I use 3G. I was just on xda forums on my phone for about 5 min. and the battery went from 65% to 60%. If I turn 3G off it stands idle for awhile.
Click to expand...
Click to collapse
Lowering your max and min cpu frequencies will improve your battery life. I've always used 128 MHz as a min with no ill effects. Ever since I got my evo I've kept the max at 998 MHz and it was plenty fast, but I am currently trying out 691 MHz max and it seems just as snappy so far (battery life was great at 998 MHz max for low or moderate usage, but with heavy usage I've noticed it drains too fast). I'll probably try out some lower max frequencies to see how low I can go without affecting performance.
amase005 said:
Yea I was thinking about an extended battery as well. It seems like taking 3G off does wonders for the battery. Are you keeping yours on or off to get great battery life?
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
Use JuiceDefender to automatically toggle your data connection (3g/1x) off when the screen is off. This will dramatically improve your battery life especially when you're in areas with poor signal. If you want, you can set it to turn on the data connection at user-defined intervals so emails, google voice, and anything else that needs a data connection to be refreshed periodically can go through. With the paid version, you can even allow exceptions for programs like google music, pandora, or wireless tether, so they can keep the connection while the screen is off if they're in use.

Ill try juicedefender. I had it before but didn't really know what settings to use. Current battery is doing well. I'm curious to if all these people experiencing 20-30 hrs of battery life have data turned off a alot. I'm currently at about 14 hrs. with about 42 percent left. Thanks for all ur advice.
Sent from my PC36100 using XDA Premium App

amase005 said:
Ill try juicedefender. I had it before but didn't really know what settings to use. Current battery is doing well. I'm curious to if all these people experiencing 20-30 hrs of battery life have data turned off a alot. I'm currently at about 14 hrs. with about 42 percent left. Thanks for all ur advice.
Sent from my PC36100 using XDA Premium App
Click to expand...
Click to collapse
I can easily get over 40 hours with light usage and over 20 hours with moderate usage, but that's only because of JuiceDefender. Without it, my battery drains like crazy at work where there's really bad reception.
I use the customize profile with mobile data enabled, schedule enabled at a frequency of 30 min, and apps enabled when the screen is off for google music, pandora, and wireless tether. I also enable the text notification which puts the icon in the status bar. I've run into problems when I disabled notification where JD gets shut down in low memory situations, but having the icon in the status bar prevents that. I leave wifi, location, and night mode diabled, but that's just because they're not useful for my usage. I'm sure the other profiles work fine as well, but I just like knowing and controlling exactly what JD is going to do.

Try using saveged Zen with conservative governer, viper mod and other little things people have mentioned
Sent from my PC36100 using Tapatalk

raphenucleus said:
I can easily get over 40 hours with light usage and over 20 hours with moderate usage, but that's only because of JuiceDefender. Without it, my battery drains like crazy at work where there's really bad reception.
I use the customize profile with mobile data enabled, schedule enabled at a frequency of 30 min, and apps enabled when the screen is off for google music, pandora, and wireless tether. I also enable the text notification which puts the icon in the status bar. I've run into problems when I disabled notification where JD gets shut down in low memory situations, but having the icon in the status bar prevents that. I leave wifi, location, and night mode diabled, but that's just because they're not useful for my usage. I'm sure the other profiles work fine as well, but I just like knowing and controlling exactly what JD is going to do.
Click to expand...
Click to collapse
I'm going to run JD all day today with those settings to see what it does for battery life with my data on. Yesterday seemed to be the best battery life I've recieved with data off for the majority of the day. Got about 17 hrs with 39% left. I'm happy with that. If JD can get me something like that without having to toggle with data on/off that will be nice.

Crossrocker said:
Try using saveged Zen with conservative governer, viper mod and other little things people have mentioned
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
I've run viper mod with tiamat before and undervolted 50mv with little or no change in the overall performance of the battery. Any suggested settings for savaged zen using viper mod?

Undervolt as much as you can, all phones are different. As for jd, sorry I forgot about that. It's a HUGE improvement. Your battery can pretty much double. It can be a little annoying in some cases.
Sent from my PC36100 using Tapatalk

Didn't really get to do a full trial on battery life yesterday. I downloaded a Sense Rom and tried some troubleshooting that I read on Deck's page but it didn't work. Today will be the first full day I try JD with 3G on. I will probably try viiper mod tomorrow after the results I get for today. Thank for the help guys.

amase005 said:
Didn't really get to do a full trial on battery life yesterday. I downloaded a Sense Rom and tried some troubleshooting that I read on Deck's page but it didn't work. Today will be the first full day I try JD with 3G on. I will probably try viiper mod tomorrow after the results I get for today. Thank for the help guys.
Click to expand...
Click to collapse
You can't judge in one day.. you have to wait like 3 days of use to let it settle down
Deck's + SZ + SuperCharger script + ViperMod script.

I believe I have found what i belive is just about the perfect setup for this ROM
My evo is lightning fast, in app performance is almost comparable to my xoom
And with heavy usage my battery lasts at least twenty hours
Kernel: savaged Zen 2.2.1 bfs
Setcpu info: Max clock to 1136, try 1152 if 1136 is stable for Max clock, min 245. Savaged Zen governor, screen off profile with interactivex governor and min bumped to 384mhz. Eliminates all screen on lag
Market app: chainfire 3d its a graphics driver that increases all animations, 3d effects efficiency and speed, and improves battery life IMO follow in app instructions and install the driver, make sure to nand backup first and to not have the phone connected to the charger or computer when installing
Market app: battery calibration wipes battery stats to build new ones that are correct for your ROM kernel setup
Advanced setting in settings menu: performance settings, VM heap size set to 48
Market app : SD booster set SD cache to 3000 makes all SD apps and media faster.
Market app : busy box install 1.18.4
After all this install any user apps you wish and run fix permissions in ROM manager or recovery
Its a lengthy setup, but there is much profit to be had. This setup is faster then I've ever seen an evo run and has the best battery life of any ROM kernel combo I've tested.
Sent from my Xoom using XDA Premium App

Battery drain is ridiculous...please help

My battery is draining like CRAZY and i cant seem to find out what the issue is. Ive tried calibration several times and using a task manager that turns off running apps every few seconds(which seemed to make it worse) and that didn't help. Auto updates are turned off and fbook is only set to update every hour and brightness is set to minimum yet my battery only seem to last 8hrs. please help. i would really like to pinpoint what the issue is.
Oh...im running ERA Legendary 2.1, CPU speed and voltages are stock

That screenshot is worthless. It doesn't show anything useful. Percentages are meaningless. Get Betterbatterystats to see what is running as far as processes and partial wakes. Get CPUspy. To make sure your phone is going into deep sleep. Get Memory Booster Lite to see what is using your battery and get rid of the auto task killer. That will kill your battery fast.
Sent from my SPH-D700 using XDA App

kennyglass123 said:
That screenshot is worthless. It doesn't show anything useful. Percentages are meaningless. Get Betterbatterystats to see what is running as far as processes and partial wakes. Get CPUspy. To make sure your phone is going into deep sleep. Get Memory Booster Lite to see what is using your battery and get rid of the auto task killer. That will kill your battery fast.
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
i only posted the screen shot to show the time vs percentage. i already got rid of the task killer and here is a screenshot from better battery stats. idk how to stop the processes though...

Again the percentages mean nothing. In Gingerbread everything goes through Android system so it will always be highest. If you use your phone only an hour or two a day then it will drop to around 60% with cell standby getting higher. They will always add up to 100% whether on a minute or 10 hours.
You didn't post the partial wake locks screen. Also did you check CPUspy for deep sleep? Did you uninstall the autokiller? You can go into settings>applications>running services and stop applications that shouldn't be running like Facebook or music and video players, etc. Sometimes it's best to get an app like Bloat freezer and freeze apps that keep reloading if you don't use them often.

CardnalSyn said:
My battery is draining like CRAZY and i cant seem to find out what the issue is. Ive tried calibration several times and using a task manager that turns off running apps every few seconds(which seemed to make it worse) and that didn't help. Auto updates are turned off and fbook is only set to update every hour and brightness is set to minimum yet my battery only seem to last 8hrs. please help. i would really like to pinpoint what the issue is.
Oh...im running ERA Legendary 2.1, CPU speed and voltages are stock
Click to expand...
Click to collapse
Another question and maybe the most important...what is your screen on time? I didn't see it in the screen shots. I think Max screen on Time I have gotten is right around 4hours. All the battery tweaks in the world wont help, if your screen is on a lot. Also...make sure to freeze drm, sns and system updates. Use randomlking's zip file.
If none of that works...wash, rinse, repeat. Wipe clean and reflash, rom and kernel.
Sent from my SPH-D700 using xda premium

As I'm sure you know, everyone's battery drainage is widely independent. However; I'm on "stock" Legendary 2.1 and recently with the updated Samurai kernel as well and run Juice Defender Ultimate. I've got some advance settings set but over the past 3-4 days, I average about 20 to 22 hours on a single charge.
My usage in an average day is: about 20-30 texts, about 10 minutes of phone calls, 10-12 emails in and out, 10 minutes of web, whatever app updates there may be and maybe about 15-30 minutes of light to medium use games.
If JDU is something you might want to look into, I would be more than willing to post my setup to get you started. <--For some reason, people are real stingy with their JDU settings.

This kinda thing just happens sometimes, and usually clears up on it's own. Especially common after flashing new software.
sent from my secret underground bunker

[Q] 8h battery life (on idle)

Hi all!
How do I find what exactly is draining the battery?
Ie. is there an app or something that can tell me what exactly is doing the damage?
(Settings - About - Battery use is not very helpful: now i know that it's Android System and Cell standby.)
It used to work perfectly fine for up to two days with wifi, 3g and sync. Up until cca a week ago. Now, if 3g is ON, the phone gets really warm and eats battery life in just a few hours. Wifi, on the other hand, can be on (sleep policy: never off) and i still get 1-2 days of battery life.
Specs:
Wildfire
CM7 nightly 256 *
latest radio *
* doubt any of these two is the culprit - trying to resolve the battery issue i updated my CM7 nightly (v.80 or so) to the latest one (v.256). Full wipe as always. That didn't do the trick. That's when i found some posts on xda suggesting that flashing the radio might help. Tried that too. No joy.

Try with these 2 apps. It should provide an overview:
CPU Spy (To see if your phone downclocks automatically or not. An 8 hour battery life on idle doesn't suggest it to me)
http://forum.xda-developers.com/showthread.php?t=1011497
Better Battery Stats (Important - You can check the Wakelocks and actually see the process name which is consuming CPU cycles / battery. Its all explained nicely in the OP)
http://forum.xda-developers.com/showthread.php?t=1179809

I am using CM7 Nightly 256. I'm getting a good battery life (1 day approx) I recommend you to remove unwanted apps, disable autosync, disable gps when not in use. And ya use the apps recommended by 3xeno as above
And consider using SetCPU. Screen-off profile.

Thanks for the suggestions. Looking into it at the moment with better battery stats (and it's documentation). Will post a solution if i find one.

i have the same problem with battery...must charge daily.

same problem here
Running CM7 7.0.3,and after starting to use the ICS theme,started to get battery drain.
BBS shows the progress "suspend" work extensively,but can't figure out which program is causing this.
CPU Spy show 84%-85% in deep sleep,which means something is running back there.
See attached Jpegs.
Will a newer kernel flash do the trick?or will a Rom upgrade?
Thanks in advance.

Try to use CPU Master Pro. In Screen Off Profilles try to put 264Mhz Max CPU frequency
Before that my battery live 3 days

yohaim said:
Running CM7 7.0.3,and after starting to use the ICS theme,started to get battery drain.
BBS shows the progress "suspend" work extensively,but can't figure out which program is causing this.
CPU Spy show 84%-85% in deep sleep,which means something is running back there.
See attached Jpegs.
Will a newer kernel flash do the trick?or will a Rom upgrade?
Thanks in advance.
Click to expand...
Click to collapse
84-85% on deep sleep is fine. As per your screenshot, are you getting 18Hrs battery life (From 100 to 40)? If that's the case, it's actually pretty good battery life.

i wanted to ask. do heavy themes consume too much battery?

In my eyes any colours on the screen would use more battery than a black image. It's probably not that noticeable though.
Sent from my HTC Wildfire using xda premium

Scratch0805 said:
In my eyes any colours on the screen would use more battery than a black image. It's probably not that noticeable though.
Sent from my HTC Wildfire using xda premium
Click to expand...
Click to collapse
Blacks are more energy efficient on LED screens only, since there the LED can just turn off.
Here the LCD needs to display a black color.