Develop Bugs

Major battery consumption at idle

I recently installed the new Kingx Kernel #10 CFS and noticed it had major battery consumption at idle when the screen is off. I would turn off the sync, at setcpu to powersave at 245. In about an hour my battery dropped 10% with absolutely no usage. I noticed this was a problem with King #10 so I switched to King #9 BFS and have the same issue, even when I underclock all the way to 245. My phone lasts about 8 hours with minimum to no usage. What is going on here?

Your phone is probably not sleeping...some apps are known offenders...system panel or maybe default app manager may give you a clue

are you wiping dalvik-cache and cache before you flash?

Uninstall SetCPU and let your processor try to manage power consumption on its own. SetCPU does NOT help with battery life, contrary to popular belief. Do that and report back.

Yes I am wiping cache and dalvik before each flash. I never had a problem with this before. I will try disabling setcpu and see what happens.
Also I believe the phone is sleeping correctly. When I check the awake times and time it from when I turn the screen off, its usually only ahead by a couple of seconds.

check if you have installed tango, that's known to rape your battery

mrono said:
check if you have installed tango, that's known to rape your battery
Click to expand...
Click to collapse
Yeah, they need to include a jar of KY with that download.

So I un-installed SetCPU and my battery consumption went back to normal. I dont get it. I also switched to Kings BFS #9. I have never had problems with SetCPU consuming battery at idle. In fact I could easily get 24 hours usage when I set my phone in powersave mode when not in use. Now it drains battery even in powersave.

[Q] SetCPU

What are the settings you guys have to save battery life? Also How do I setup the profiles?

Help From No One???

I turn background data off, turn data and wifi off. My setcpu profiles. Screen off max300 min300,100 priority. I got a droid x and my battery lasts with medium to light use 24 hours before I have to charge.
Sent from my DROIDX using XDA App

Check your governor settings too.
I've found conservative with 80/55 up/down threshold, 10% steps to give a good medium between performance and battery life. Also, I've downclocked the max cpu speed to 921Mhz. 128Mhz for sleeping.
Edit: I do have background data turned on, as well as enable always on data toggled on under settings/networks/mobile data. Wifi is to never sleep. I do try to use wifi over 3g whenever possible - it extends battery life considerably.
With light use, I get 3-4 days, moderate use ~2 days, and heavy use will give a good solid day.

Can't thank from Tapatalk, but excellent reply. I like the detail.
gpz1100 said:
Check your governor settings too.
I've found conservative with 80/55 up/down threshold, 10% steps to give a good medium between performance and battery life. Also, I've downclocked the max cpu speed to 921Mhz. 128Mhz for sleeping.
Edit: I do have background data turned on, as well as enable always on data toggled on under settings/networks/mobile data. Wifi is to never sleep. I do try to use wifi over 3g whenever possible - it extends battery life considerably.
With light use, I get 3-4 days, moderate use ~2 days, and heavy use will give a good solid day.
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Click to collapse
Sent from my PC36100 using Tapatalk

N/P.. I experimented with a number of different settings a while back, and although i'm sure this could probably be tweaked even further, it works exceptionally well as is. One of the methods of measuring was to see the stats from 'time_in_state'. I was looking for good utilization of cpu freq's between the min/max. My other criteria was good response in interactive apps (email, browser, scrolling).
ymmv.
PS. I do not use setcpu, but the above along with the sleeping script in the rom (see below), achieves the same thing.

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?
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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.
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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
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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.
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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
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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.
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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
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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

[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.