Database Users

Battery life on 2.6.32.15 kernel looking good...

I have an EVO that is completetly stock latest SW-3.29.651.5 and kernel-2.6.32.15 and the battery life stock is looking real good. I have not done any battery saving techniques such as turn off wifi and background syncs. This is an average daily use for me...could easily get 2 full days with some battery saving. Personally I am considering just staying stock on this EVO. Side by Side comparisons with my other rooted one has going either way a good deal...

I agree. With this latest update and kernel, my battery life is about 1 day now, or 12 hours with a lot of usage, which is what a lot of evo users have been getting from the start.
I'm also running fresh 3.3 and the newest htc kernel, and have stopped using all task kills, startup killers, cpu adjusters, ect.

I seem to be getting about 4-8 hours of use out of the phone. I am not really concerned with standby time.
So during the week, I will easily get 20 hours of out it before it complains, weekends maybe longer as I am not using it as much.

That's really impressive! I have the same kernel and build number, but my battery life doesn't seem as good.
Just curious, are you on wifi most of the time? And do you keep GPS on and always-on mobile data?

How's the battery life when using talk time? I'm looking at picking an evo up but there are days I use a solid 2 hours a day talking.

imekul said:
That's really impressive! I have the same kernel and build number, but my battery life doesn't seem as good.
Just curious, are you on wifi most of the time? And do you keep GPS on and always-on mobile data?
Click to expand...
Click to collapse
My wifi stays on as does gps ect. The only thing I do when I do a fresh reset is first off turn off vibrate and any hepatic feedback. That is just a personal thing for me and is the only battery saving thing I do. I did however do a full battery charge thing...you know where you have it plugged in power on and full charge. Then unplug and turn off...re-plug and full charge/green light. This may or may not be why the battery life is so good but I am liking it for sure.

Best rom/kernel combo for battery life?

I know this is beating a dead horse to a pulp, but I'm going to ask any way. I have never been a typical user, and I burn my phone to the ground fast. My usage fluctuates so much testing is almost impossible.
Just asking anyone who has had the patience what they have found the best results with.
I'm currently on Super Clean 0.9 and the OTB ul 1200. Flameless responses appreciated.
Sent from my SCH-I500 using XDA App

I have the same setup that you do and it seems that I am blowing through my battery even faster with the lower voltage, which makes no sense. I also have noticed significantly worse battery life with DJ05. Not sure if you have noticed these things as well and was the reason for the post.

Im not sure if super clean 0.9 is based off of dj05 as I use my own fragmented rom with prices of everyone elses ROMS. But the best battery life I get is out of dj05 for sure. Running a random kernel that I think adrynalyne or jt posted in irc and I usually get a full day with moderate to heavy web browsing and 3-4 hours of music. But I also have outstanding 3g in both of the places where I live so that doesn't deplete my battery like most people
Sent from my phone using XDA App. With a very flame-free response sir wolven

With stupidfast 1.54 and superdark dj05 I feel like battery life has improved. I can go through a whole day, minimal use, and still have 82% battery life at the end of the day or hover around 40-50% with regular use.
its 9:20pm right now and I am still at 76%. With some browsing, music, phone calls.

Kamar234 said:
I have the same setup that you do and it seems that I am blowing through my battery even faster with the lower voltage, which makes no sense. I also have noticed significantly worse battery life with DJ05. Not sure if you have noticed these things as well and was the reason for the post.
Click to expand...
Click to collapse
I have seen the same with lv kernels both here and on my N1. possibly needing more pull for higher resource usage, but I'm lacking on the technical knowledge to make sense of that, and have had too much egg nog as of now.

ksizzle9 said:
Im not sure if super clean 0.9 is based off of dj05 as I use my own fragmented rom with prices of everyone elses ROMS. But the best battery life I get is out of dj05 for sure. Running a random kernel that I think adrynalyne or jt posted in irc and I usually get a full day with moderate to heavy web browsing and 3-4 hours of music. But I also have outstanding 3g in both of the places where I live so that doesn't deplete my battery like most people
Sent from my phone using XDA App. With a very flame-free response sir wolven
Click to expand...
Click to collapse
I somehow seem to get better life from a stock with BS apps removed, but like I said, haven't tested properly. I usually hate battery life threads but have been aggravated by 9-10 hours before death as of late. Probably just excessive usage, but I'm banking on the community to share exp. with their phones.
Flameless response appreciated.

rmtobler said:
With stupidfast 1.54 and superdark dj05 I feel like battery life has improved. I can go through a whole day, minimal use, and still have 82% battery life at the end of the day or hover around 40-50% with regular use.
its 9:20pm right now and I am still at 76%. With some browsing, music, phone calls.
Click to expand...
Click to collapse
ROFL. If I could ever put my phone down i might see better life. I like the stupidfast, but saw some minor performance delays that led me back to voodoo. Not much of an improvement on my life tho.

I have been frustrated with battery life on the sf from day one. I called VZ the other day to have the lady tell me it's normal to charge it 3 times a day due to widgets, I then proceeded to waste my breath by telling her I don't run widgets.. Her response was well they will still drain your battery.
I don't want to un root my phone just to take it in to a store and get the battery replaced and apparently calling them won't get me any where either
Sent from my SCH-I500 using XDA App

I use blue tooth + 3g for an hour drive to work and since the voodoo 5 kernels with the ul settings I have been at 85+% each day from the normal 75+%. So my battery life has improved greatly! Keep up the awesome work devs!
Sent from my SCH-I500 using XDA App

I get pretty decent battery life out of the DJ05 OTB Voodoo sv combo (around 7 hours with periods of heavy usage). I also use juicedefender but I've heard it cant control the CDMA radio properly (ie disable data and etc) but it appears to lengthen my battery life (could just be a placebo effect however)

I had the same problem....crappy battery life with DJ05 and I tried everything from wiping to endless kernel/rom combos. In the end I found out standby was killing me. Like sometimes an hour would pass without me touching my phone and it would drop 5%. Someone suggested dialing *22899 ( I think that was it) and it was instantly fixed. Now idle I drop maybe a percent every 3 hours.

What I have found is the governor does a great job of managing battery use of the CPU in conservative mode. My best combo is jt 1129 novoodoo kernel paired with black hole 2.1+ (I noticed no significant difference between 2.2 and 2.4 for battery life). My usage is fairly high, 3-8 hours of display on each day, running light apps (hardly any music, never games, synched email). Some of my numbers are posted.
Counter to intuition, I can't seem to get aggressive undervolt kernels to give me an improvement. I think it is because the minimum processor has to be kept a little higher to sustain the underlying, so on average more offline drain. This makes no sense though, because when I look at it in os monitor, the governor seems to be doing fine.
Speculating here is pretty dicey, because I have a hard time doing a lot of testing of something that doesn't seem to work. I use my phone a lot, and it is hard to justify having 40% less life span when I know of better combos.
In summary:
* I have NOTHING to say about voodoo kernels.
* negligible difference from leaving wifi and GPS and live wallpaper on.
* negligible difference between dj05 roms.
* running a custom rom gives a noticeable improvement betrays simply running ADW on to of touch wiz
* stock kernel is pretty darned good for battery life, competitive with best kernels.
* the cpu does great self management stock and mostly runs at 100 mhz for my use
* certain under volt kernels appear to under perform during non intensive tasks, but it is hard to be certain.
* bluetooth matters, only turn it on when driving or planning to talk; it does eat battery.
* leave brightness at auto or lower, pick a dark theme wherever possible. Display is the number one eater of battery. White sucks your life.
* there isn't a lot you can do to optimize battery life. Retraining the battery either works or it doesn't, but it isn't really necessary for most system or kernel changes and should be done infrequently.
* there are a few ways to eat battery fast.
* use a theme that shows battery in 1% increments, great for sanity!
* rule of thumb display on uses 4.5 times the power of display off for light apps. -- So theoretical max life on this phone is around 8.5 hours with display on, 42 hours with display off. (typical is about 4.5 hours of display on before I charge it) and yeah I should check my math... I have never had a practical test anything close to 8 hours. I would expect about 6.5 if I never locked it and kept it running in a dark app, with little data and sound use. I think a review I read got about 7.5 hours of playing avatar on loop (probably tmo galaxy s)- a result I found mystifying at the time. My personal best is about 5.5 display on.
Swyped w/ XDA App. When in doubt, jingle.

That was very informative.

I'm on Blackhole 2.4 and I tried one of the Stupidfast undervolted kernels (v1.5.4) for a week and although the battery useage improved a bit, it was somehow affecting my phones wireless reception, wifi and mobile signal. My phone usually flies thru webpages at home when it gets wifi yet it was crawling when I was on that kernel. My phone would randomly freeze as well. I just switched back to JT's 12/12 DJ05 kernel and eventhough battery useage is less desireable, I got my wireless reception back. I also just switched to a dark wallpaper, used to have an ocean / blue sky image as wallpaper. I think those beautiful/fancy weather/clock widgets affect battery useage on how often it updates itself. I switched out of beautiful widgets to gTabSimiClock widget, see if that makes a difference. I like its more simpler look.

Juice Defender With Ultimate Juice Benchmark!

Hey guys im in the process of doing a little experiment to see actually how much Juice Defender with Ultimate Juice actually improves the battery life on my Evo4G. I'm sure this has been done somewhere else i just couldn't find it so i decided to do the experiment myself and post my findings this may be useful to some people or may not!
Phone: Evo 4G
ROM: Cyanogen Mod 6.1.2
Kernal: Zendroid BFS @ 1.52ghz w/ smartass scaling
Launcher: Go Launcher
-----------------------------------------------------------------------------
Phone running Juice Defender With Ultimate Juice
Phone Unplugged At 11:42am
Phone Died At 8:59pm
Usage: For the most part it was moderate use, no gaming, 2 calls lasting for a total of aproximatly 45 minutes. 120 texts were sent and received 146 within the time frame. There was no browser usage just mostly texting like i said. 3 Pictures were taken. No Wifi. Bluetooth or 4G used either.
-----------------------------------------------------------------------------
Phone running without Juice Defender With Ultimate Juice
Phone Unplugged At: 2:50pm
Phone Died At: Never
Usage: Well my phone has been unplugged since 2:50pm and its now 12:35am and my battery is sitting at 55%. Weird... very weird. I had about the same usage as yesterday i played 1 game for a total of probably 10minutes and installed 4 apps. A had wifi enabled for probably an hour total.
-----------------------------------------------------------------------------
Final Thought: I think Juice Defender doesnt help at all, infact it seems to hurt your battery more than anything. I think it may be because its constantly turning things off and back on consuming battery? Thats the only thing i can think of. Does anyone else have any thoughts on why this is? Using Juice Defender reduced my battery life dramatically it almost cut its life in half as a matter of fact. Please share your thoughts on why this is people!

bump bump bump!!!!!

beanx said:
Hey guys im in the process of doing a little experiment to see actually how much Juice Defender with Ultimate Juice actually improves the battery life on my Evo4G. I'm sure this has been done somewhere else i just couldn't find it so i decided to do the experiment myself and post my findings this may be useful to some people or may not!
Phone: Evo 4G
ROM: Cyanogen Mod 6.1.2
Kernal: Zendroid BFS @ 1.52ghz w/ smartass scaling
Launcher: Go Launcher
-----------------------------------------------------------------------------
Phone running Juice Defender With Ultimate Juice
Phone Unplugged At 11:42am
Phone Died At 8:59pm
Usage: For the most part it was moderate use, no gaming, 2 calls lasting for a total of aproximatly 45 minutes. 120 texts were sent and received 146 within the time frame. There was no browser usage just mostly texting like i said. 3 Pictures were taken. No Wifi. Bluetooth or 4G used either.
-----------------------------------------------------------------------------
Phone running without Juice Defender With Ultimate Juice
Phone Unplugged At: 2:50pm
Phone Died At: Never
Usage: Well my phone has been unplugged since 2:50pm and its now 12:35am and my battery is sitting at 55%. Weird... very weird. I had about the same usage as yesterday i played 1 game for a total of probably 10minutes and installed 4 apps. A had wifi enabled for probably an hour total.
-----------------------------------------------------------------------------
Final Thought: I think Juice Defender doesnt help at all, infact it seems to hurt your battery more than anything. I think it may be because its constantly turning things off and back on consuming battery? Thats the only thing i can think of. Does anyone else have any thoughts on why this is? Using Juice Defender reduced my battery life dramatically it almost cut its life in half as a matter of fact. Please share your thoughts on why this is people!
Click to expand...
Click to collapse
thanks for the info. i try to tell people that juice defender doesn't help. but no one listens so i gave up and just tell them cool app and walk away lol.

very helpful post. I noticed too it doesnt seem to really help it just monitors mobile data and turns it off when screen is off and occasionally powers it on to download emails and ****. I dont like it because i like to kno when i get an email instantly versus it checking every 30 min.

I also found that juice defender seemed to have a negligible impact on my battery life while also decreasing speed of sync/convenience. You'll notice that it also makes android system skyrocket towards the top of the battery use list.
On a related note, I also found that setcpu profiles don't have an impact on battery life and may even hurt.
Ultimately, android is optimized to manage a lot of these things on its own and introducing an app that consumes battery both monitoring and brute forcing some of these activities doesn't make sense. The only active monitoring app I use now is Tasker for some specialized automation activities.

i cant believe this is an app that most people recommend to improve battery life tho. Especially with how much it hurts rather than helps. Very disappointing.

It has helped mine because I use the widget to manually shut it off and on. I don't let it control it. Since the epic doesn't have the shut off data in the power menu its good for me. Otherwise I agree with you all. I keep my data off until I need it to look something up. Personal preference. But hey it does shut my data off when I tell it to.
Sent from my Epic 4G
Rom: Never stock, but always with some Gingerbread.

I had been using juice defender and setcpu for a while trying to get the best battery life, but I ditched them both about a month ago and I'm getting better life than ever before lol
I've got 58% left in the battery and the phone has been up for 32 hours. I thought I was helping by micromanaging the phone with JD but I think it was really just hurting it.

deathsled said:
I've got 58% left in the battery and the phone has been up for 32 hours. I thought I was helping by micromanaging the phone with JD but I think it was really just hurting it.
Click to expand...
Click to collapse
32 hours up and only down to 58%? Mind if I ask how you set thigns up that your phone is so energy efficient?

It was a great application, Donut times, it literally made my Magic 32a survive the day against the not-even-a-day battery life at those times. Nowadays it is simply useless due to android better app management.

Hmmm...I have been using this for a few months now and I've seen dramatic improvement in my battery life. I usually unplug my phone at 7 each morning and by noon on moderate usage days I'm at 60%. Using JuiceDefender, my phone is typically at 80%. By 5pm with its only at %60. Normally I would get home at 5 and it would be around 30%. Interesting.
Running Samsung Captivate
Stock Android Eclair 2.1
Rooted
Zeam Launcher

With more iterations of Android they are improving power managment, Ya back a little bit ago this helped some people alittle it closing out processes and way to handle things but with android development alot of this stuff is getting worked into the OS, basically now all your doing is running a app constantley that does something handled by the OS now in newer builds.
I wonder in some cases if the juice defender and the OS both trying to do power management if it can actually cause more power loss due to a conflict in the two trying to controll items. Of course OS should have higher pid but could cause some of your increased power drain using both

try the beta

im using it on my epic and my evo i think it helps both but i am also using the free beta i dont think the regular one works

i'm shocked there's even a thread for this. i put it on a stock epic and it made a WORLD of difference.. especially in locations where my signal was poor and evdo service kept dropping. my issues with it are of a different nature. seems to get corrupt alot and the wifi locations service sucks

Hmm, i'm confused on how this could actually hurt battery life, especially by the amount you displayed unless you have it doing all kinds of other management as well. I have mine setup to only manage the data APN, disabling on screen off, and seem to have gained decent battery life from it. The widget to toggle data on/jd on/off is very handy as well.
Pretty sure android doesn't do anything natively that turns off data when phone is at rest/screen off, does it? Someone please correct me if i'm wrong.
I will admit, the new versions of JD do seem to be pretty bloated and sluggish.. i've been on the fence of whether to remove or not... The main reason i keep it on my device is because i work in a basement and get about 65% TWS and severe battery drain from that. With JD managing 3G, it helps mitigate that somewhat, and having it be automatic is much more convenient than toggling it manually all the time.
I may have to join you on some testing, because if JD is not gaining me anything, i'll definately be removing it as it sometimes causes some initial sluggishness when turning the screen on. From daily usage experiences (and i watch it like a hawk), my battery life has definately not been made worse.. older versions seemed to net me more life, and i'm undecided on the new versions. Not enough time with it on/off to decide yet.

Most Def Work
JD helps... it will slow down notifications and stuff, if you need always on data then this won't help. However, during the day I'm usually already online and don't need non-stop notifications and if you use JuicePlotter you can clearly see that while sitting idle with JuiceDefender on you use significantly less battery than if you don't have JuiceDefender active and have it sitting idle.

for those that think jd works...
are you using the free, pro, or ultimate version? looking to buy if it really saves battery life.

which configs did you use? I had it a few months ago and my battery did actually improve. Trying some different settings makes a huge improvement.
I am using superpower now. (from XDA actually) And this is really working, it also takes some configuration, but eventually it will benefit your battery life.
Superpower turns data to 2g when your screen is off, disables wifi and bluetooth and sets your cpu to a 400mhz cap (at least with my phone) I noticed a 1% overnight drain and a 200% increase in battery life. (basically I do two days with heavy use vs. one day before)
Hope this helps some people!

The only thing that actually changes the battery in an evo is a kernel. No quick fix app is going to help how your system interacts with your battery! Senseui is garbage and it sucks up battery life like no bodies business!

[Q] What's your Battery Life after EB01

I hear constant griping about battery life since EB01. So I was curious what amount of time are people getting on their full charge? I am getting about 13hours. Definitely less than before but tolerable. Have done all the battery wiping techniques. Why is there such a different between users?

I get about 15 hours of good use out of it since updating to EB01. this is with moderate use.

After about 18 hours, I'm generally ~1/3rd the battery left. I'd say a large part of the variance is how we actually use it. I think it'd be good if at the end of the day, you wrote down the unplugged time, the % remaining, the % of the top several items in battery use, as WELL as the actually amount of time for each of them. Right now 'display' has used 41% of my battery, but only been on for 11m45s (the phone has been unplugged for 6h45m, with 72% remaining).
Without the full context, it's extremely hard to actually have any idea what's going on (terms like 'light'/'heavy' use are totally meaningless). One person that regularly gets 2 days (depending on my use I can easily), vs a person that can barely make it through a day... that doesn't mean that the latter person's phone is messed up, they might stream LOTS of music & videos, while the other leaves theirs in airplane mode half the time.
Edit: I'm on SC 2.1, with GPS, all location services, WiFi, and auto rotate off. I leave sync on always, and I'm nearly to 9 hours now... with still 72% remaining... and just dropped to 71%!

Horrible... with vanilla froyo v5 it was amazing, but every other has been almost intolerable. Sc2.4,blackhole,gingerbread... I've tried all of them, for several batt cycles. On second day of miui, ill report in a few days. I've always flashed at full battle, never have GPS or wifi on, turn sync off a lot, and always have my screen turned down. I'm at around 10 ta 13% drain an hour
Sent from my SCH-I500 using XDA App

I know I said I was getting 12-13 hours. Well I did the battery script download and am now at 63% after 12 hours. I would highly recommend giving it a try. It didn't seem to do anything the first day. More the second day couldn't be happier.
Sent from my SCH-I500 using XDA App

SC2.2 nonvoodoo with no power management apps. Overnight off charger for 8 hours battery loss is about 3%. My typical numbers starting from a full charge averaged below.
Screen 3.5 hours.
Calls 45min.
Gmail sync avg. 20 emails.
SMS avg. 30
TWS +/- 4%
BW weather updates hourly.
Those numbers usually get me to about 15-20% battery. So with that usage it can be done in one day or I have also stretched that usage over 2 days.
good day.

Anybody try any of the battery saver apps like super power or juice defender? I have tried juice defender but it wasn't toggling data so now I'm trying superpower & it toggles fine but keeps the phone in partial wake according to spare parts so I wonder if there's any real benefit... I'm now down to 11% after 10 hrs off the charge.
Sent from my SuperClean'd SGS

After trying the battery wipe script, and several battery cycles, I'm about 1/3 less battery life than I was on DL09. I'm hoping once we get source, we can get a LV optimized kernel to get it back to where it was.

garywojdan81 said:
Anybody try any of the battery saver apps like super power or juice defender?
Click to expand...
Click to collapse
I used Juice Defender back on DL05, but found that it made my battery run down faster AND it'd cause many of my apps to update inconsistently (using both the default setting, as well as others). Even after disabling, and then uninstalling it, my sync settings were screwed up until I flashed EB01.
I'm not going to trust any of those apps again... thinks work better if you just find apps that aren't power hogs (such as constantly polling the network!).

Back on DL09 SC 0.9, with Adrynalyne's undervolted Voodoo kernel, I could get two days with light usage without trying very hard. Now on EB01 SC 2.4, I struggle to make a full day. Not sure if the drain can be fixed with working kernel source code or not, but I imagine it will help a lot. Until then, I can't bring myself to go back to Eclair again, so for the moment I'm putting up with the poorer battery life and lack of Voodoo sound.
Posted from my EB01 SuperClean Fascinate with Voodoo

battery issues

Has anyone having issues with battery runs out drasticlly. Charge it and then with in minutes its dead. Get a full charge turn it off and back on then its dead.

I had that problem with my epic after flashing a custom rom. battery needs to be calibrated if it was not flashed at 100%. you can download battery calibration app from the market place.

Ya calibrate will help the readings but don't expect amazing battery. I have the seido expanded battery and it still can't make a day of heavy use.
Sent from my SPH-D700 using XDA App

i installed the syndicate frozen rom 1.1 and now enjoying a battery that still has life after return home from work (12-14 hours unplugged....medium use....about 40% remaining when i get home)

I'm using syndicate 1.2 with genocide 2.0 undervolted extensively on conservative and with the 3300 mAh battery I don't get that
AJ4VS said:
i installed the syndicate frozen rom 1.1 and now enjoying a battery that still has life after return home from work (12-14 hours unplugged....medium use....about 40% remaining when i get home)
Click to expand...
Click to collapse
Sent from my SPH-D700 using XDA App

I had this issue on a few ROMs, specifically the Anonymous i3. I would charge all night and by the time I got to work (1.5 hours on the bus) I would have only 50% or less battery from listening either to Pandora or other music and with 4G off. It's infuriating. I have not calibrated my battery as of the moment, however I did go to the RandomRom and my battery life is phenomenal in comparison so I would recommend (and my recommendations carry no weight because I am nothing more than a casual user who only recently began rooting) looking at what you are running and checking battery drain on other ROMs.

Your specific issue is calibration. Its that simple, its misreading you battery status
Xiutehcuhtli said:
I had this issue on a few ROMs, specifically the Anonymous i3. I would charge all night and by the time I got to work (1.5 hours on the bus) I would have only 50% or less battery from listening either to Pandora or other music and with 4G off. It's infuriating. I have not calibrated my battery as of the moment, however I did go to the RandomRom and my battery life is phenomenal in comparison so I would recommend (and my recommendations carry no weight because I am nothing more than a casual user who only recently began rooting) looking at what you are running and checking battery drain on other ROMs.
Click to expand...
Click to collapse
Sent from my SPH-D700 using XDA App

I figured that was likely it, but never worried about it since I still got good usage without ever calibrating. The anonymous i3 is the only one that didn't have decent battery life for me. Random has been the best so far, gets me about 10 hours with basic use.
Sent from my SPH-D700 using XDA App