Currently on checkrom revolution 1.0 KI4 with hardcore's latest speedmod k2-8. Have had this phone for ard 5 months now and u can call me a compulsive flasher since I'm always flashing the latest roms, kernels and firmwares.
Throughout these 5 months, this overnight battery drain issue has been bugging me relentlessly, regardless of the firmware or rom used. Typically my phone will be off in the morning if i leave it at anything below 50% charge when going to bed. In contrast i've read of many accounts of sub 5% overnight drains that has lead me to suspect some kind of mistake on my part rather then a fundamental flaw in the design of the phone/software. Would be great if the xda community could assist by giving some insight into this matter, for in sure some of you might be/have been experiencing the same issue and might have solved it or are awaiting similar insight as well.
Sent from my GT-I9100 using Tapatalk
no its not normal. I lose 1-2% over an 7-8 hour period when im sleeping.
Install betterbatterystats and see what your wakelocks are over night. Something is obviously keeping your phone awake. The usual culprits are being signed into latitude or facebook chat.
i would suggest either change kernel or better yet change roms...kernel i would suggest ninp 2.0.5..stable and good battery life..also if you use setcpu i can provide you with frequencies so you can test it..message me so i can give them to you..regarding betterbatterystats i would not use but as skimmingstones say use it and see what your wakelocks are cause ur stats do not sound right buddy
Jeez! 40% overnight? I once had 8/9% drain overnight and got annoyed. Install Better Battery Stats first to see what apps/processes are causing the wakelocks. Then go on to change kernel and SetCPU etc for further betterment, but at first see what's going on background, with the help of BBS.
Post up screenshots of battery usage please.
My sister was loosing 40% each night turned out to be the Hotmail app not sleeping!
LOL 40 % !? your phone is the best drain phone ever :/
maybe U can set your display to low brightness and look of your phone goes to deep-sleep mode (CpuSpy)
Dude,
Try also to calibrate battery.
Look at my signature.
not normal for me lolz
Hey guys, I'm experiencing extremely high AOS usage in the battery stats. It is almost always higher than Display Usage.
SETUP
Rom: HyDrOG3N-ICS 13.05
Kernel: SiyahKernel v3.2.5.1
Battery: Official 2000mah
I've got some UV/UC for CPU and GPU, I don't experience any freezes or slowdown's at all.
I've tried turning off BLN and it didn't affect the AOS usage which means that there must be something else contributing to the high AOS usage.
I've got sync on and some periodic (1hr interval) syncs such as weather. I've got an additional push account. [IMO, this shouldn't be part of AOS]
Does anyone have any ideas how I can find out the culprits for AOS?
betterbaterystats app install an c wats draining....
lambstone said:
Hey guys, I'm experiencing extremely high AOS usage in the battery stats. It is almost always higher than Display Usage.
Click to expand...
Click to collapse
is that betterbatterystats ? or the normal battery stats in the ics options ?
depending on how much screen on time u have ur next big battery sucker will be Aos (since u stated that u have sync on) if the phone is idle most of the time...
in my case i see Aos usage thru the first half of the day being the most battery sucker, passing afternoon its display and calls with Aos after them and at night i have Aos climb back up top... why? because i leave the phone in my pocket most of the time except for when i need to call/send a msg thru whatever app/sms/mms..... or anything and that keeps the phone awake for that short time and then its back to idle in my pocket and the only thing working is Aos checking email and whatever is on in sync
dont be surprized to see it up top its only natural, but keep track of how much power u lose. Losing 0-5% of battery life an hour on idle(screen off/locked) depending on signal strength with sync on is normal... more than that and i would be looking for any wakelocks or whatever is causing the phone to lose so much battery juice.
i have seen bad modems use even more battery juice just trying to maintain a good signal even with data&sync off and 2g
Not sure how I managed to fix it. There wasn't any out of the ordinary wakelocks. I flashed the 3.2.8.2 siyah kernel and at the same time adjusted the polling rate of BMW. Seems like it was battery monitor widget battery polling rate that contribute to the AOS. I always thought that it would show up as a separate usage stat.
Hi everyone
So I recently got a S2, upgraded it from stock Gingerbread to stock ICS via Kies, then flashed CM9. CM9 was great, but I quickly noticed worse battery drain than that of GB. I sorted out all wakelocks, now facebook is the top one in better battery stats list and it's only 10mins in a day so I don't think that's a problem. When charging, vbus_present shows up and keeps the phone from sleeping, but that's a normal thing when the phone is plugged, right? CPUspy shows the phone is in deep sleep the majority of time I don't use it, so I assume I have no wakelock problem.
But even then, the battery still seems a bit bad. When in deep sleep with wifi and mobile data off, it would lose around 1.5% per hour; and with moderate/high use (internet with wifi or gaming), I'd be lucky to have it last 3 hours. Charging to 100% from zero takes about 3 hours.
I also tried recalibrating the battery through BC, but haven't noticed too much of a difference.
Recently I found a guide on disabling fast dormancy via the build.prop file. Still waiting for results though.
So, my questions
1, My battery usage seems normal, doesn't it? 1.5% per deep sleep hour is acceptable I guess, but 3 hours of usage seems a bit short. Too short.
2, What effects does fast dormancy have?
1) Totally unacceptable. Mine lasts at least 7-8 hours with high use..
Does your phone heat up while the heavy use ???
What brightness level do you use for the display ???
How many apps do you have that can gain internet access ???
2) By default, the Samsung Galaxy S II has Fast Dormancy support enabled. One of the goals of Fast Dormancy is to increase the battery life of a device, by limiting the amount of signaling between the phone and the cell network. But, when Fast Dormancy it is not enabled in the network and is enabled on the phone it ironically works the other way around, and actually drains more battery than before.
Luckily, Fast Dormancy can be disabled on the phone. For the Galaxy S II, do the following:
Dial *#9900#
Press “Disable Fast Dormancy“
Press “Exit“.
Easy as that!
Thanks for the suggestion I have brightness manual and at around 20%. Wifi is disabled when not used, and mobile data is always turned off unless I need it, so basically apps only get internet access when I want them to. I have also disabled sync for both google and facebook, but fb still pushes notifications to me while it's connected. Is that a major battery drain, and if yes, how to disable it?
Anyways, facebook, instagram, youtube are the only apps than can access the internet. No messengers or anything that may keep a wakelock.
My phone doesn't heat up during normal use, maybe a bit when I do some gaming (Max Payne?)
Also, *#9900# doesn't do anything on my phone. It doesn't bring up a menu or anything like that.
Bump. Guys?
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Install BetterBatteryStats (search for it on here/Google Play), might help you nail what's causing the drain.
Yes I did, as said in my original post. After a night the highest wakelock are just around 10 minutes, and that one was facebook. Uninstalling it however had no effect.
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Thinking logically, there's got to be something else in those stats (partial wakelocks in particular) that's causing that drain. There's no way having fast dormancy enabled/disabled is either going to cause/fix the drain you've mentioned getting '3 hours of usage'; (I can get 5 & a bit hours screen on with CM9 & variable usage/mostly 'moderate' use) given everything else you say you've tried.
Post BBS logs here if you want someone to have a look.
Edit to add - Also post a screenshot of the 2nd screen in settings/battery, the one that has history 'details' at the top, with the 'mobile network signal' bar underneath the main battery graph.
Here you go: pastebin.com/1UwicChJ
I just registered half a day ago and don't have enough posts yet to paste links, so sorry the phone was only on battery for nearly 2 hours with some light browsing and facebook, but I hope it works.
Anyway, I looked through my running processes, and dsp manager is the only non-OS process running, besides facebook. I got CM9 so it came by default. Could dspmanager be the culprit?
Delivered using Nyan Cat's rainbow powers.
It's a new phone he's got there and I doubt it could be anything battery related itself.
I'm using CM9 nightlies and I get around 9 hours moderate use. It has been said though that a lot of these CM9 builds have battery drain and heat issues.
I use Juicedefender to help with the battery life which seems to work.
Sent from my GT-I9100 using Tapatalk 2
MistahBungle said:
Edit to add - Also post a screenshot of the 2nd screen in settings/battery, the one that has history 'details' at the top, with the 'mobile network signal' bar underneath the main battery graph.
Click to expand...
Click to collapse
About 1/3 of this time was on wifi browsing. The drop is much more drastic if I play games.
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A couple of observations. There's nothing that stands right out in the BBS log. The other one is, looking at that graph you've lost ~15% over a bit under 2 hrs. The screen has been on most of the time the phone has been awake (confirmed by the BBS log) if you look at the respective bars. You've also been using WiFi for most of the time the screen has been on/phone has been awake.
Roughly speaking, going by the screenshot, you'd get ~5hrs+/- screen on time if you kept using the phone in the same way you had during that just under 2 hrs, and this is pretty much normal. I haven't had drain issues for ages, so I double checked my details on the 2nd screen of settings/battery to make sure CM9 is reporting these details accurately (screenshot attached). Certainly in my case, this screenshot reflects what my phone had been doing for the just under 5 hrs it had been off charge/since last reboot; that is, >90% of the time in idle/deep sleep. So it probably isn't CM9 reporting these details inaccurately in your case either.
The BBS log & screenshot don't illustrate the problem you talked about in your OP. Now, if I had to take a stab in the dark at what's causing problems when you do have them (and FWIW, I do believe you're having the problems you mentioned in your OP at times), in the absence of any other info, maybe your WiFi router is constantly sending the phone packets (what's been referred to as a 'dirty router' on here before) when you're connected to WiFi & not actually using it. This scenario has been known to cause relatively high levels of drain.
So to be honest with you, based on that screenshot & the BBS log, I'm not really seeing a problem.
Now, if you want to post the same again when you actually have a problem with drain similar to what you described in your OP, happy to have a look at them. But for that ~2hrs covered by the BBS log & screenshot you posted, that's pretty much normal.
MistahBungle said:
A couple of observations. There's nothing that stands right out in the BBS log. The other one is, looking at that graph you've lost ~15% over a bit under 2 hrs. The screen has been on most of the time the phone has been awake (confirmed by the BBS log) if you look at the respective bars. You've also been using WiFi for most of the time the screen has been on/phone has been awake.
Roughly speaking, going by the screenshot, you'd get ~5hrs+/- screen on time if you kept using the phone in the same way you had during that just under 2 hrs, and this is pretty much normal. I haven't had drain issues for ages, so I double checked my details on the 2nd screen of settings/battery to make sure CM9 is reporting these details accurately (screenshot attached). Certainly in my case, this screenshot reflects what my phone had been doing for the just under 5 hrs it had been off charge/since last reboot; that is, >90% of the time in idle/deep sleep. So it probably isn't CM9 reporting these details inaccurately in your case either.
The BBS log & screenshot don't illustrate the problem you talked about in your OP. Now, if I had to take a stab in the dark at what's causing problems when you do have them (and FWIW, I do believe you're having the problems you mentioned in your OP at times), in the absence of any other info, maybe your WiFi router is constantly sending the phone packets (what's been referred to as a 'dirty router' on here before) when you're connected to WiFi & not actually using it. This scenario has been known to cause relatively high levels of drain.
So to be honest with you, based on that screenshot & the BBS log, I'm not really seeing a problem.
Now, if you want to post the same again when you actually have a problem with drain similar to what you described in your OP, happy to have a look at them. But for that ~2hrs covered by the BBS log & screenshot you posted, that's pretty much normal.
Click to expand...
Click to collapse
Okay, much appreciated so I guess I'll take it from your reply that 5 hours with wifi browsing isn't too bad. Seems okay, but I still find it a bit strange that (in my case) wifi browsing uses just as much battery as games do. I always thought it was a light activity!
Or maybe it wasn't the battery that had a problem, but that I set my expectations a bit too high. I came to this S2 from a BlackBerry 9700, whose battery would last half a week with very frequent use. But anyway, I just got this phone for a week, so I consider myself a pretty heavy user. Probably when I get familiar with it, I won't feel the need to play with it every five minutes and battery will last a bit longer then! xD
Nah. Anything with screen on is far from 'light activity'. Screen consumes far & away the most juice. In saying that, I've seen some people on here say they can get 8-9 hrs screen on with 2000mAh battery. How they do it I have absolutely no idea.
But if yeah, 5 hrs with the screen on most of the time whether browsing or playing games (games in particular are very CPU/GPU intensive & thus use a lot of zzzzs; unless they're really basic games like chess or similar), or anything else isn't too bad. Can you do better ? Obviously, if people say they can get 8-9 hrs. But it's not a matter of doing A, B & C and you'll magically end up with massive screen on times. Every phone is setup & used differently, and getting the absolute max out of every charge takes a lot of trial & error and experimenting with settings/setup.
There are tons of threads about the subject on here if you feel like going down that path. For me, I'm happy with the battery life I get these days because you can really obsess over it & spend a lot of time stressing over it/trying to maximise it for often very little gain. I'd rather simply use my phone a lot during the day & charge it at night.
Yeah Crackberries are like Japanese cars, they can run on fumes pretty much ;-) Having a dual core processor, a decent GPU & a huge screen kinda changes things.
There is one thing you can do fairly easily tho. And that's to make sure the phone spends as much time as possible in deep sleep when you're not using it. That will ensure that you have enough juice to get you by when you do want to use it. Simple ways to help achieve that is to turn off data/WiFi completely when you're not using it (tho many people don't like to do this for different reasons; which is perfectly OK if you're happy to live with the resultant drain), and make sure you've got no apps that are doing things they shouldn't be doing (like syncing, for example) while the phone should be sleeping. Again, there are lots of threads about same if you ever feel like a bit of light reading ;-)
So yeah, if you do find you experience drain that's not normal/outside the usual pattern you have, definitely post details & people can have a look for you. And as you said, you'll get to know what really is normal with regard to drain & so on is as you use the phone more (I tended to use it constantly for that first couple of weeks as well).
nyancatland said:
Okay, much appreciated so I guess I'll take it from your reply that 5 hours with wifi browsing isn't too bad. Seems okay, but I still find it a bit strange that (in my case) wifi browsing uses just as much battery as games do. I always thought it was a light activity!
Or maybe it wasn't the battery that had a problem, but that I set my expectations a bit too high. I came to this S2 from a BlackBerry 9700, whose battery would last half a week with very frequent use. But anyway, I just got this phone for a week, so I consider myself a pretty heavy user. Probably when I get familiar with it, I won't feel the need to play with it every five minutes and battery will last a bit longer then! xD
Click to expand...
Click to collapse
Already took such measures. Wakelocks killed my battery over my first night with the phone, and I woke up after 7 hours to find a ~50% battery completely empty. Now things are alright, I clear CPUSpy stats before I sleep and wake up to around 95% of deep sleep time. Overnight drain varies between 5 and 10%.
And yes, yes you are right. Maybe I should stop going nuts. I'm checking BBS and CPUSpy every hour, reading every XDA thread on battery, and calculating my battery drainage every morning I wake up :laugh::laugh::laugh:
Re: dirty/'noisy' WiFi networks, have a look at this post as an example of what I was talking about above.
MistahBungle said:
Re: dirty/'noisy' WiFi networks, have a look at this post as an example of what I was talking about above.
Click to expand...
Click to collapse
Umm...so I just woke up, and noticed a wakelock in the kernel category. It was PowerManagerService, and it occupied around half an hour. Overnight, aftet I've slept 10 hours (got a day off ), my battery came from 24% down to 13%. That's a rate of roughly 1% per hour. Is that normal? And also, what is that PowetManagerService wakelock?
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Fantastic. Looks like you got your 10 posts That tip is about as useful as "don't plant cauliflowers in concrete".
trojans63 said:
Turn off wifi and dont play games and your batter will last longer
Click to expand...
Click to collapse
finally found a thread on this issue after posting
http://forum.xda-developers.com/showthread.php?t=1748301
sorry mods, pls delete
Me too ... it's driving me nuts.
I am experiencing this. My battery life is horrendous. Even when I barely touch the phone the battery drains extremely quickly. I have already rooted the phone with a few different roms with the battery setting "fix" to no avail. I'm on at&t. I have disabled wifi and gps. I have tried to use both the stock app killers and 3rd party ones recommended by these forums. My battery monitoring apps (both stock and 3rd party) consistently attribute the battery loss (always more than 90% of battery use) to an android system app. The android system app or file changes from day to day seemingly randomly. Files have included: UltaCfg, com.samsung.app.playreadyui and security storage.
Any help will be extremely* appreciated. I love the phone but it is nearly useless in this state.
zeesubalpha said:
I have been experiencing some serious battery drain issues. Looking at my battery stats, "Android System" is responsible for over half of the drainage. These are the only apps that run constantly besides those which the phone requires to operate:
- SetCPU
- HDWidges
- The Weather Channel
- LBE Privacy Guard
- avast! Mobile Security
other phone info is in sig. Any insight/advice??
Click to expand...
Click to collapse
I am draining my battery as quickly as I can (streaming Netflix through 4G LTE with max screen brightness, max overlclock w/ performance gov) and then i'm going to power off and do a full recharge. this seemed to have fixed similar issues in this thread:
http://forum.xda-developers.com/showthread.php?t=1756776
let you know the results.
edit: suppose i should say that i was not experiencing this issue until i updated KT747 this morning.
this is what i did:
1) drain the battery completely. let the phone die.
2) charge to 100%. do not power the phone on until it is completely charged to 100%.
3) when i powered the phone on I was at 99%. i plugged it in and it went to 100% in about 2 minutes.
this seems to have completely solved my problem. the android system has gone from using 57% of the battery to 6%. it seems like the kernel i was using vastly overestimates the percentage of the battery to allocate to the android system until it "learns" the capacity of the battery
zeesubalpha said:
this is what i did:
1) drain the battery completely. let the phone die.
2) charge to 100%. do not power the phone on until it is completely charged to 100%.
3) when i powered the phone on I was at 99%. i plugged it in and it went to 100% in about 2 minutes.
this seems to have completely solved my problem. the android system has gone from using 57% of the battery to 6%. it seems like the kernel i was using vastly overestimates the percentage of the battery to allocate to the android system until it "learns" the capacity of the battery
Click to expand...
Click to collapse
So this worked for you? I am having excessive battery drain with my Telus S3?
colemac said:
So this worked for you? I am having excessive battery drain with my Telus S3?
Click to expand...
Click to collapse
I am also a Telus user. I had big time battery drain issues even with trying everything: enabling power savings mode, running Juice Defender, using wifi more, using darker wallpaper, keeping a closer eye on syncing operations, screen brightness and some other stuff.
After about 10 days I went back to the vendor (Futureshop) and convinced them to give me an exchange on the battery. They have a 14 day return/exchange policy for cell phones if you are not completely satisfied. I took some screenshots to argue my case. Thankfully the rep said ok and further explained how much power an AMOLED screen uses. I really didn't want to convince him that I am quite informed on battery drain issus and took the new battery and ran!
Conclusion is the new battery is so much better it's like night and day. I have the capacity now that others have been raving about.
If you can exchange the battery, do it. Then get the new battery and charge it up fully first thing.
After three failed flashes of JellyBro 231 from 8/1 and Devil 1.0.4 test3, I thought I had it. Things were buttery. I had an entire morning of slick performance.
I then played with the Devil Kernel Config app to try and get some additional time out of my battery (drain is considerably higher than what I had on Team Whiskey's last Froyo build which, admittedly, sets the bar quite high for efficiency). Playing with deep idle and min/max freq settings invariably seem to reward me with sleeps of death.
I'll take this ROM as it is with Devil - it works, it's smooth, and I can charge my phone at work. If anyone has suggestions for squeezing out a few extra hours, though, I'd happily take them.
[Bump]
OK, at least part of the issue appears to be due to Exchange Services and excessive wakelocks due to said service. It appears to be a common issue on all 4.x devces. Rebooting my device appears to help for some time but then the issue returns within a day or two. Battery life is average when wakelocks aren't killing the battery entirly but when the device is held "awake" by the service, it drains 75% in about 6 hours.
FYI, my exchange account is set to poll once an hour, not "push". Such a schedule helped my battery life immensely on my Froyo install. Hope echange services get fixed eventually.
My question still remains if there are any other power-saving tips people might have.
What are your current settings in devil config?
I don't use exchange, in fact I removed it.
A couple of things that help me
1. Re calibrate battery!
I went from 6hrs on charge to 16+ after calibration with battery calibration app!
2. I keep sync off and manually sync when needed....
3. I have minimal widgets, and no live wallpapers (battery killers)
4. In settings>WiFi>press menu>advanced>WiFi when sleep (never).
All these things I read on a thread about extending battery life.
Currently running Hellybean 0806.
drool on my chin from a mouth full of jellybeans
samsgun357 said:
What are your current settings in devil config?
I don't use exchange, in fact I removed it.
A couple of things that help me
1. Re calibrate battery!
I went from 6hrs on charge to 16+ after calibration with battery calibration app!
2. I keep sync off and manually sync when needed....
3. I have minimal widgets, and no live wallpapers (battery killers)
4. In settings>WiFi>press menu>advanced>WiFi when sleep (never).
All these things I read on a thread about extending battery life.
Currently running Hellybean 0806.
drool on my chin from a mouth full of jellybeans
Click to expand...
Click to collapse
I reverted my settings in devil config to the defaults, so nothing remarkable there. As for your suggestions, please see below:
1. Perhaps, but consider this: after charging overnight, my battery drained 20% in less than 2 hours. The battery usage chart indicated that the Android System process kept it awake the majority of that time. Rebooting the phone causes it to have a much more modest drain, my "Awake" status bar isn't a continuous green bar but, rather, a broken bar as I would expect. It would seem it's not just Exchange at fault, nor is it simply a battery calibration issue, otherwise I wouldn't see the excessive drain in association with a "keep awake" process. The measure of charge drop can be directly correlated to the keep awake status - the less the phone is kept awake, the less my battery is drained.
2. I've been using Froyo for 1.5 years and have had the same sync settings that I have now in Skang - hourly for Exchange and default for Google. After 16 hours uptime in Team Whiskey's ROM, I was generally down to 50%-60% battery. Now I don't even last 6 hours with this issue.
3. No more widgets than what I had in Team Whiskey's ROM. My calendar and Google Voice inbox are the only two. No live wallpapers either.
4. WiFi is on but, again, this is exactly what I had set in Team Whiskey's ROM.
I'm not trying to trumpet Team Whiskey's Froyo ROM for the sake of promoting it. Simply trying to indicate that, from a settings standpoint, I got apples to apples here. I already was aware of your suggested means of getting extra time and, not trying to be dismissive, but I prefer my settings and I know it should be possible to get better battery life with them. Perhaps I should have been more explicit in my question - does anyone have a means of squeezing extra battery life using the Devil Kernel Config. Deep Idle and min clock do a great job of saving battery... and sending my device into a SoD. If there are specific clock speeds to avoid/try, that would be helpful, not to mention if there is anyone who actually got deep idle to work. In concept, it is great.
Perhaps, now that I've seen these two "keep awake" issues (Exchange and Android System) this thread is less relevant - I'm convinced that I will get similar battery life to Team Wiskey's ROM if I can just keep certain processes from keeping the phone awake. Admittedly, "Android System" is not the most helpful in diagnosing the issue as it appears to be a dumping ground for miscellaneous processes' statistics rather than a specific process. In any case, I appear to have an easy way of reproducing the issue - charge for an extended period of time and remove from the charger without a reboot. Rebooting seems to fix the issue until the next charging cycle. I can live with that for now.
Thanks for your input, samsgun357. Sorry I wasn't more explicit in my original question as well as measures I've already considered - I could have saved you a little typing.
If anyone else has noticed this issue with "keep awake" processes that go away after reboot, I'd appreciate input. I'd like to see if there's any way I could help to uncover the root cause of this issue.
PlacidCat said:
I reverted my settings in devil config to the defaults, so nothing remarkable there. As for your suggestions, please see below:
1. Perhaps, but consider this: after charging overnight, my battery drained 20% in less than 2 hours. The battery usage chart indicated that the Android System process kept it awake the majority of that time. Rebooting the phone causes it to have a much more modest drain, my "Awake" status bar isn't a continuous green bar but, rather, a broken bar as I would expect. It would seem it's not just Exchange at fault, nor is it simply a battery calibration issue, otherwise I wouldn't see the excessive drain in association with a "keep awake" process. The measure of charge drop can be directly correlated to the keep awake status - the less the phone is kept awake, the less my battery is drained.
2. I've been using Froyo for 1.5 years and have had the same sync settings that I have now in Skang - hourly for Exchange and default for Google. After 16 hours uptime in Team Whiskey's ROM, I was generally down to 50%-60% battery. Now I don't even last 6 hours with this issue.
3. No more widgets than what I had in Team Whiskey's ROM. My calendar and Google Voice inbox are the only two. No live wallpapers either.
4. WiFi is on but, again, this is exactly what I had set in Team Whiskey's ROM.
I'm not trying to trumpet Team Whiskey's Froyo ROM for the sake of promoting it. Simply trying to indicate that, from a settings standpoint, I got apples to apples here. I already was aware of your suggested means of getting extra time and, not trying to be dismissive, but I prefer my settings and I know it should be possible to get better battery life with them. Perhaps I should have been more explicit in my question - does anyone have a means of squeezing extra battery life using the Devil Kernel Config. Deep Idle and min clock do a great job of saving battery... and sending my device into a SoD. If there are specific clock speeds to avoid/try, that would be helpful, not to mention if there is anyone who actually got deep idle to work. In concept, it is great.
Perhaps, now that I've seen these two "keep awake" issues (Exchange and Android System) this thread is less relevant - I'm convinced that I will get similar battery life to Team Wiskey's ROM if I can just keep certain processes from keeping the phone awake. Admittedly, "Android System" is not the most helpful in diagnosing the issue as it appears to be a dumping ground for miscellaneous processes' statistics rather than a specific process. In any case, I appear to have an easy way of reproducing the issue - charge for an extended period of time and remove from the charger without a reboot. Rebooting seems to fix the issue until the next charging cycle. I can live with that for now.
Thanks for your input, samsgun357. Sorry I wasn't more explicit in my original question as well as measures I've already considered - I could have saved you a little typing.
If anyone else has noticed this issue with "keep awake" processes that go away after reboot, I'd appreciate input. I'd like to see if there's any way I could help to uncover the root cause of this issue.
Click to expand...
Click to collapse
I have an Infuse SGH-i997.
I've seen quite a few reports of battery drain, simply because I'm looking for them.
Here is a thread for you to check out. There are quite a few links from there too.
http://forum.xda-developers.com/showthread.php?t=1408433
note times and dates
have fun