Battery drain - Acer Iconia Tab A100

I am losing about 2-3% battery an hour even when tablet is just sitting there. I've put it in airplane mode to see if it was the wireless but it has not helped. I've even done a factory reset and let it sit there in airplane mode without any of my apps installed and it was still losing about 2%/hr. I monitor the usage and it seems that three different kworker/u:0 process is constantly taking up CPU even during sleep. All I can find on Google is that it is a swapping process. Why it is swapping when system is sitting there is beyond me.
Anyone having similar issue?
Sent from my A500 using Tapatalk

Are you on the gen2 build? My tablet ate battery life like crazy when I first picked it up. I tried removing bloat, airplane mode, even factory reset. It didn't go away until I downgraded to gen1 and removed all the un-needed apps, now it will sleep all day in my car in airplane mode and be at 99 to 97% when I get home.

I was on gen2 but I downgraded to Gen1 with all the updates. I only froze all the bloat with titanium backup. Guess I'll uninstall to see if that makes a difference.
Sent from my HTC Glacier using Tapatalk

Try installing auto airplane mode by don and CPU spy so you can see if your tablet is going into deep sleep
By the way I have gen1 on my tablet

Have you tried the tweaked build.prop by crossix? It did quite a difference for me. He did some tweaks in there to lower the battery drain.

I am using the new buld.prop. I just need to track down whatever process is using kworker/u:1. Seems to be the main battery killer.
Sent from my A500 using Tapatalk

I used betterbatterystats on my GB phone to find the source of a battery drain at one point, it shows what apps are holding the CPU in a wakelock and what percentage of time they are held. Don't know if it works with HC though. Haven't had a reason to try it. :-\
Sent from my A100 using Tapatalk

madman_sle said:
I used betterbatterystats on my GB phone to find the source of a battery drain at one point, it shows what apps are holding the CPU in a wakelock and what percentage of time they are held. Don't know if it works with HC though. Haven't had a reason to try it. :-\
Sent from my A100 using Tapatalk
Click to expand...
Click to collapse
ditto. i get amazing battery life. im at 2 days 3hours and at 55%
Sent from my SGH-I897 using xda premium

Gonna check that app out. I did find one source of battery drain though. It was the Google docs app. Look like it was waking up every once in a while to sync. Uninstalled it and only losing about 1-2% /hr now. Getting better.
Sent from my A500 using Tapatalk

Disabling auto-sync and the Background data under settings>accounts & sync can help save some battery as well. You could only enable background data if you really need it (with Market, etc).
Sent from my A100 using xda premium

Autosync is disabled. Not sure why but Google docs just seems to wake the tablet up every once in a while from deep sleep.
Sent from my A500 using Tapatalk

Related

I need a good battery saver app.

Anyone know of a good battery saver app that actually work? Right now I'm using juice defender ultimate and it is OK and I'm sure most of the problem is the rom I'm using (simonsimons34's cm9 for marvelc, great rom) I just charged my phone to 86% and 15 minutes later its at 61%. Any advice or tips are greatly appreciated, thank you.
Sent from my Wildfire S A510c using XDA
Is deep sleep working on that ROM cause that's an awful lot of battery usage... Or were you doing something battery-expensive at the time?
I personally don't believe in battery saving apps. All they do is manage your phone's hardware (wifi,Bluetooth etc.) They are always running in the background so they use even more battery. Apps like BetterBatteryStats help you track your battery usage so you see what's using your battery the most and cut down it's usage
Sent from my Wildfire S A510e using XDA
vbhtt said:
I personally don't believe in battery saving apps. All they do is manage your phone's hardware (wifi,Bluetooth etc.) They are always running in the background so they use even more battery. Apps like BetterBatteryStats help you track your battery usage so you see what's using your battery the most and cut down it's usage
Sent from my Wildfire S A510e using XDA
Click to expand...
Click to collapse
I agree, it's much better to do it yourself via a notification drawer power widget.
Make sure bluetooth and wifi isn't left on all day, turn off gps (gps is still on, albeit in a power saving mode, even if the icon isn't showing) when you aren't using it. Lower your screen brightness. Turn off sync and data if they're not needed, and go into aeroplane mode if you don't have any signal (because your phone will drain the battery desperately trying to find a network tower).
I don't think deep sleep is being used on this rom, and its still in beta so Bluetooth and wifi aren't working right now. I have easy task killer to stop running un needed apps and juice defender helps a little. I have had battery issues before but I seriously want to just throw it sometimes, I feel like I am always at the charger with my phone. But thank you guys for the help.
Sent from my Wildfire S A510c using XDA
ogfrier said:
I don't think deep sleep is being used on this rom, and its still in beta so Bluetooth and wifi aren't working right now. I have easy task killer to stop running un needed apps and juice defender helps a little. I have had battery issues before but I seriously want to just throw it sometimes, I feel like I am always at the charger with my phone. But thank you guys for the help.
Sent from my Wildfire S A510c using XDA
Click to expand...
Click to collapse
A task killer will only drain battery, trust me. Leaving these apps in RAM won't use up any more battery, but having them relaunch after you kill them will.
If deep sleep isn't working, you would benefit from setting a lower minimum CPU clock. You might suffer a slight performance loss when you unlock. Or otherwise, you can try setting different CPU settings for on and off state. I believe setCPU allows this but you'll need to check.
Helped me slightly with modpunks alpha 0 which didn't have deep sleep.
Without deep sleep, I'm afraid most of the other battery saving methods won't work much...
Sent from my Wildfire S A510e using XDA
I dont think that setcpu will help completely, the mentioned drain of battery is a huge amount..and yes the best battery saver is yourself ..maybe your time time change the battery has come up?
I had the same issue a little while ago. when I checked in the battery section of the menu I found that "media server" was running ALOT. often it was using more battery than the screen. after reading a few posts and downloading watchdog lite to see when the process was running, I heard that it could be that the SD card needed formatting (and partitioning as I use INT2EXT). So I formatted my SD, made a new partition reflashed the ROM, gapps and script and BINGO. no more "media server", no more problem.
don't know if this helps but thought id mention it, it was driving me mad.

Wifi drain or just normal?

Hi,
New to the note 2, not new to being a flashaholic. Being very tame atm and only using stock rom (rooted) with no Cwm.
Strangely I get about 10% drain overnight. Got better batt app but doesn't really show much except wifi is/was on.. And this audio_out_2.
Is that normal on stock rom? On the dhd it was more like 1-2% on experimental roms
Sent from my GT-N7105 using Tapatalk 2
you must have sync on
JLneonhug said:
Hi,
New to the note 2, not new to being a flashaholic. Being very tame atm and only using stock rom (rooted) with no Cwm.
Strangely I get about 10% drain overnight. Got better batt app but doesn't really show much except wifi is/was on.. And this audio_out_2.
Is that normal on stock rom? On the dhd it was more like 1-2% on experimental roms
Sent from my GT-N7105 using Tapatalk 2
Click to expand...
Click to collapse
Disable stuff manually or use Juice Defender Ultimate (3.9.6). I use JD and never turn anything of manually.
I do have sync on. I guess what people are trying to say it's pretty standard on stock rom and I'm in need of an awesome custom rom to flash?
I used jd ages ago but configuring is a bit of a pain.. I may try it again till awesome roms comes out.
Sent from my GT-N7105 using Tapatalk 2
JLneonhug said:
Hi,
New to the note 2, not new to being a flashaholic. Being very tame atm and only using stock rom (rooted) with no Cwm.
Strangely I get about 10% drain overnight. Got better batt app but doesn't really show much except wifi is/was on.. And this audio_out_2.
Is that normal on stock rom? On the dhd it was more like 1-2% on experimental roms
Sent from my GT-N7105 using Tapatalk 2
Click to expand...
Click to collapse
Check you applications, I have 90 apps installed and only have 0.5-0.6% per hour while sleeping with sync on.
Tonight, for example, I left wild blood downloading the last 200 mb it needed.
It took like 5 minutes, then I woke up and I noticed that it kept the device awake for 6 hours even after finishing the download, Battery went for 50 to 43% in 6 hours..
Custom roms won't make a great difference.. Maybe removing some bloatware will do, but you can stay on stock imho.
JLneonhug said:
Hi,
New to the note 2, not new to being a flashaholic. Being very tame atm and only using stock rom (rooted) with no Cwm.
Strangely I get about 10% drain overnight.
Click to expand...
Click to collapse
Just a question, do you, by any chance, have SIM plugged in? I observed quite higher power drain (overnight) when I did not have SIM inside.
Yeah, I have sim in at all times.. Erm apps wise, I've not added any new ones before my upgrade so I guess if there is an issue it would be some bloat apps? I tried to freeze as many as I dare using tb. (well, I followed the script of apps to delete on the other thread).
What app did you used to find what apps drained x amount per hr? That seems like a clever one
Sent from my GT-N7105 using Tapatalk 2
Yeah, I have similar experiences. My phone drains around 10% overnight with no apps in the background and wifi off.
So what I'm doing and it seems that it has marginally helped is:
1. Turn off Sync
2. Turn off Notifications from Email accounts as these come in all the time even overnight and the notification process and the Blue LED will drain the battery
3. Decrease screen brightness to around 40%
4. Turn on wifi only when needed
5. Disable some of the apps I don't use (Chaton, Yahoo Finance and Yahoo news, S Suggest and Samsung Store, etc)
Now I get about of 1 1/2 day of regular use.
Think I found the culprit..
Has anyone got motion feature turned on? There's that sneak wake function ticked on mine as default, I switched that off and I only got 4% drain overnight.
Perhaps others may want to give this a go and see if it helps?
Sent from my GT-N7105 using Tapatalk 2
JLneonhug said:
Think I found the culprit..
Has anyone got motion feature turned on? There's that sneak wake function ticked on mine as default, I switched that off and I only got 4% drain overnight.
Click to expand...
Click to collapse
4-5% per night is what I see on my GT-N7100 (intl), with Wifi on, BT off, GPS off, NFC off, Sync on.
I got Motion on though, with following features: "Tilt to zoom", "Palm swipe to capture", "Palm touch to mute/pause". I am not sure which one is supposed to be "sneak wake" one .
But now, when thinking about it, I realize I do not need any of those, so I am going to turn Motion off completely to see if it has any impact.

[Q] Relatively unfair battery drain issue (Running stock JB 4.1.2 XXDLL4)

Or so I've come to believe it's unfair anyway, I just don't get how some people achieve 19+ hours or so on battery life, with 'heavy' usage as well like they claim.
I have posted some battery usage screenshots if it might be of any help.
When I was using the phone out of the box with an earlier stock firmware, it was the same as of now, even after my current XXDLL4 update. I always kill background apps, from ram and from running tasks, turn GPS off and other unused features, e.g. NFC, S beam, you name it. Like for example with these screenshots, I was using the phone moderately all day, a bit of browsing, some phone calls and a few games. Is 3 hours of screen time supposed to be normal with this battery reading? I don't get it Is there anything I can do to get these long hour performances on battery that everyone else seems to be getting with their note 2?
Im on stock unrooted 4.1.2 rom. Battery life was decent until I went to settings, application manger and then to all and disabled apps that I don't use including some widgets. Eg Simple alarm, learning hub, remote controls, Samsung sync etc and battery is significantly better.
With Whatsapp and Facebook running on the back ground all the time. .. I still manage to get 6hrs screen time.
However you must understand battery life is very much subjective to your signal strength, usage and the apps running in the background. Generally 4 to 5hrs on screen time with heavy usage such as 3d gaming etc is considered pretty good.
As long your phone can get through the day with a single charge, I would say that's good enough and enjoy every features of the phone without worrying about battery life
Hope I helped.
Sent from my GT-N7105 using xda premium
Thanks for your thoughts, another issue that I notice I'm having is this mediaserver battery drain, I've tried performing a few fixed including removing album art, trying .nomedia, even removing all music altogether, but nothing seems to work. I'm starting to believe all these people with 10+ hours of screen on time have been photoshopping the screenshots! LOL! Seriously, the battery life is starting to resemble an old iPhone 4 that I used to own.
Update your rom....
Sent from my GT-N7100 using xda app-developers app
Looks like your phone is always awake!
Look at this screen shot
Your phone must go in sleep mode to achieve a good battery life.
Best regards
Sifou
Using a Samsung N7100
Can you be more specific? Which rom do you know out there that isn't custom? I prefer stock only. If Thanks
Sent from my GT-N7100 using xda premium
Are u able to identify what are the apps constantly running in your background?
I highly suggest u to do these few things for now.
1) update your rom to the latest 4.1.2 rom provided in your country. Go to settings, about device and go to software update or download Samsung kies, connect your phone to samsung kies if you have the latest stock rom.
2) Turn off sync.
3) Run through all your apps settings and phone settings. Turn off unneeded notifications
4) Go to application manager, scroll to all and disable whatever stuff you dont use. If it breaks something, just re enable it.
5) After all of above, go to application manager again, scroll to running applications and see what is running in your phone background.
6) if you have problems with media scan, go to application manager. Scroll to all and clear cache of the following apps. Download provider, downloads, media storage, gallery and drm protected storage and reboot the phone.
Another small tip is I diabled google search, Dropbox, disabled online search under contact settings, disable sync with wifi in gallery settings, disabled talkback, turn off all notifications in google plus settings. Turned off Facebook notofications and auto update.
Let us know if it works for u
Sent from my GT-N7105 using xda premium
update to the latest rom februari edition
Thanks I have already tried all your suggestions. I just dont want to go down the extended battery route, as there are many of them which I dont trust, unless you know a well known brand I could go for?
Sent from my GT-N7100 using xda premium
There are currently no new February firmwares for my country/carrier. The latest one was in December, which I'm using right now.
Sent from my GT-N7100 using xda premium
I think your stats are okay. Because you're using H+. If you switch to 2G you'll see massive gain in backup.
Besides, 4.1.2 literally killed 15-20% backup from 4.1.1, don't know what was ****ing point, but Samsung did it! Just keep monitoring via Better Battery Stats, which apps/process are causing wakelocks, and then do the needful.
'Swyped' from my GT-N7100
It seems like there is too much wakelocks, judging by your stats. You are not rooted, right? If so, it's impossible to diagnose the wakelocks without simply guessing and eliminating which app is causing them.
The maps wakelock caused by Google now, along with AudioOut_2 and media scanner are among the most dire. The first can be "fixed" by disabling location services.
Sent from my GT-N7100 using Tapatalk 2
Ilker123 said:
There are currently no new February firmwares for my country/carrier. The latest one was in December, which I'm using right now.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
Just for your information. Your battery performance really below par which note 2 it should be.
2hours plus on screen time and 10 hours operating time left 5% was totally unacceptable.
With super heavy use, note2 at least must be able to last 10hours++ with 3.5 hours on screen with 20% left.
( with 3g, wifi and gps always on. Continuos download 2 movies using qvod for about 2 hours)
Sent from my GT-N7100 using xda premium
Sent from my GT-N7100 using xda premium
Delete

Battery life issues

Hi,
Something seems to be draining my battery. I froze QuickRemote apps, it didnt improvement.
Any ideas? This way since i bought it
I turned of sync in the settings. And I described services with the built in task manager. Long press home button then tasks manager. Then hit the menu key. You will see a list of everything with services. I checked almost all of mine then hit OK.. It keeps those spots listed from running background services. Helped My battery life out..
Sent from my LG-E980 using xda app-developers app
I am also facing the battery drain issue and wifi stuck during browsing or downloading. Stand by time is also not good 7% drain in 7 hour. How can i find the issue is in battery or is hardware problem?
Charge your device up by to 100% and then fully discharge your battery to recalibrate the battery. I'd say try this two times.
Also, one thing weird about this device is, turning on WiFi drains the battery faster than using LTE.
Sent from my LG-E980 using Tapatalk 2
I get like 15hr of medium to heavy use with mine
Sent from my LG-E980 using xda app-developers app
Its probably because of the value pack update. Its modem causes constant wake locks. Going back to the original stock modem will fix that.
Sent from my LG-E980 using xda app-developers app
Flash the official stock rom fully discharged the battery and charge it to full. Play music use wifi half an hour and medium use. Attaching pics. Is it ok now or ?

Battery life

Just a general question, i have no problem with my devices battery life during useage, but whats annoying me is how much battery life i'm losing when the device is "asleep"!
i can lose between 10 and 25% battery when the device is asleep overnight, or while i'm at work.
this isnt a one off, it seems to happen most of the time, so i'm having to charge it every couple of days, rather then once or twice a week.
is this a general problem, or do i need to do a reset.
thanks
There are many apps found out there (some need root) that can track down what's eating the battery and or preventing device sleep. Google Search app is probably one of the culprits. I disabled it long ago.
If you're not rooted, try to disable some "bloatware" apps in your device settings > applications. .... If your rooted, freeze apps from self-starting using greenify app or remove with Titanium backup app. Just backup them first
I could go on and on, but at least some pointers where to start. Good luck
Have your wifi sleep when not in use. You may have some apps hijacking your bandwidth. You should only lose a few percent overnight...
Sent from my SM-G900P using Tapatalk
Itchiee said:
Have your wifi sleep when not in use. You may have some apps hijacking your bandwidth. You should only lose a few percent overnight...
Sent from my SM-G900P using Tapatalk
Click to expand...
Click to collapse
I have the 8.4, fully stock and hardly a thing installed on it (it's like my 5th tablet for use) and I think its at 50% after idling for 15 days.
only thing that beats it so far is my Nook HD+, which probably idles for 4 months, literally.
having the same problem.
i do have google search in my pages. disabled it , gonna see how it goes ...
whats a good app to recommend that i can check out what is causing my device to wake while it should be asleep?
im rooted btw

Categories

Resources