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Suddenly getting crazy battery drain

Anyone else get stupid fast drain while its sleeping? I have wifi sleep policy set to turn off wifi when screen is off, and using the task manager nothing looks to be running that i havent launched myself. But usually i'd have the battery last DAYS and DAYS if i wasn't using it that much, but the last few charge cycles it's been nearly dead at the end of the day. Is there an app I can get to monitor stuff while its sleeping to see if something is keeping it from deep sleep? I can't remember what i've installed recently that could keep it in wake-lock or whatever. Thanks guys.

There's a build in feature in the settings menu to tell you what uses battery

Check that the wifi is actually sleeping when the screen is off. Tap the power button to wake up the tablet then look at the notification bar in the right hand corner to see if the wifi is turning on and connecting. If its not doing that then I dont think the wifi is disconnecting and turning off when the screen is turned off.

For battery issues, two "must have" tools are "better battery stats" and "cpu spy"

gary's right. download better battery stats here:
https://market.android.com/details?id=com.asksven.betterbatterystats
and since the developer of that app loves XDA, there's a free version for us!
OP: http://forum.xda-developers.com/showthread.php?t=1179809
DL: http://forum.xda-developers.com/attachment.php?attachmentid=833619&d=1325149176
Look into the partial wakelock and find the cuplrit!

Battery Drain
Try loading the free util Auto Airplane Mode which has helped fix the SOD issue and the related battery drain during the SOD.

Sorry to push the old post up again.
Recently im suffering from the weird battery drain, i didnt play/use my phone much on sunday , the idle battery drain is huge. like 8 hrs from 100%-40%.
I've installed both betterbatterystats and cpu spy already.
From battstats , it shows that kworker/0:1-3 and kworker/u:12-13 etc using up most of the batt , secondly is the doubletwist music player.
From cpu spy, most of the time is with 200mhz even i didnt use the phone at all, rarely goes to deep sleep mode.
for the process kworker it didnt show whats the process/app is about , anyone else know wt to do now ?

Same problem here :-(
Fully loaded at 7 o'clock and now I'm 34% - this really sucks!

faygo6464 said:
Sorry to push the old post up again.
Recently im suffering from the weird battery drain, i didnt play/use my phone much on sunday , the idle battery drain is huge. like 8 hrs from 100%-40%.
I've installed both betterbatterystats and cpu spy already.
From battstats , it shows that kworker/0:1-3 and kworker/u:12-13 etc using up most of the batt , secondly is the doubletwist music player.
From cpu spy, most of the time is with 200mhz even i didnt use the phone at all, rarely goes to deep sleep mode.
for the process kworker it didnt show whats the process/app is about , anyone else know wt to do now ?
Click to expand...
Click to collapse
All you can do is to check the apps you recently installed or updated. They might lock you from sleep. No easy way to control this

For me it was the "samsung-keyboard" - I froze it and now everything seems normal.

ICS Wifi stays on while on sleep

Hi guy, my wifi won't turn off when my Xoom is on sleep. I have set the settings of 'keep wifi on during sleep' both to 'NEVER' and 'ONLY WHEN PLUGGED' but nothing happens. Wifi stays on and keeps draining my battery life. I am running rooted with the latest version of nightly 62 and I've been having this issue since 55. I have reinstalled, flashed, factory reset, wiped my Xoom.
Is anyone else having this issue? What should I do?

From my experience, wifi stays on for a little while longer after device sleeps. However, some apps in background may trigger wifi back on again. So I turn off wifi when i go to bed. Actually i notice wifi itself will not drain much battery, 1-2% for 10hr. It's the host apps sucking the juice.
I am not an expert though.

OK i've also checked it out and as you said wifi turns off after some time. My main problem now is that my battery life won't last more than 3-4 hours on wifi.
I have posted my battery stats with use of web browsing and watching pictures on gallery...

jimgeroul said:
My main problem now is that my battery life won't last more than 3-4 hours on wifi.
Click to expand...
Click to collapse
What do you mean "no more than 3-4 hours"? In your battery chart, you can get more than that even starting from 75% battery.

What I wanted to say is that I think my battery won't last more than 4 hours with wifi on and some serious usage.. from my stats as I can see I've been using it 5 hours but I only had screen on and browsing the web. I think there will be a huge difference if I am watching a movie or playing a game.. I don't have the time to check it now but I will post my results in some days..
According to my previous battery graph do you see any problem or something less from what your Xoom battery holds? Does this battery drain seems normal to you?

jimgeroul said:
Hi guy, my wifi won't turn off when my Xoom is on sleep. I have set the settings of 'keep wifi on during sleep' both to 'NEVER' and 'ONLY WHEN PLUGGED' but nothing happens. Wifi stays on and keeps draining my battery life. I am running rooted with the latest version of nightly 62 and I've been having this issue since 55. I have reinstalled, flashed, factory reset, wiped my Xoom.
Is anyone else having this issue? What should I do?
Click to expand...
Click to collapse
I think you'll find it will stay on for about 15 minutes. There is some setting in a system database (using a sqlite editor) that can be changed to bring this down. I doubt Wifi is what's draining your battery. Are you synching email via activesync or running other stuff in the background?

I am only using my yahoo mail from the EMail app. I don't know if it uses activesync. I have set it to check emails every 30minutes.

wifi not turning off
Edit: I found the wifi sleep option in ICS. Google sure did a great job of hiding it. See attached picture for anyone else having wifi staying on during sleep issues.

So there are three options
Keep WiFi on during sleep
1) Always
2) Only when plugged in
3) Never
What option to set if i want Wifi to turn of after some time of when phone sleeps. Previously i had set the option to 15 minutes but that option is not available in ICS and i m having a hard time understanding how these options work on my sensation.
Can anyone explain what each of these options do ?

lazers378 said:
So there are three options
Keep WiFi on during sleep
1) Always
2) Only when plugged in
3) Never
What option to set if i want Wifi to turn of after some time of when phone sleeps. Previously i had set the option to 15 minutes but that option is not available in ICS and i m having a hard time understanding how these options work on my sensation.
Can anyone explain what each of these options do ?
Click to expand...
Click to collapse
My guess:
1) Always: WIFI always on no matter awake or asleep
2) Only when plugged in: WIFI always on only when plugged to power
3) Never: WIFI will be off if asleep (my current setting)

That was it
invidious07 said:
Edit: I found the wifi sleep option in ICS. Google sure did a great job of hiding it. See attached picture for anyone else having wifi staying on during sleep issues.
Click to expand...
Click to collapse
Thanks, I had not seen the option to turn wifi off during sleep.
--Doug

Bear in mind that (irritatingly) applications can seemingly change this setting.

cspiby said:
Bear in mind that (irritatingly) applications can seemingly change this setting.
Click to expand...
Click to collapse
For an app to change wifi sleep policy, it needs the WRITE_SETTINGS permission.

Battery dies over night.

I use awesome off to turn my pad on and off so I don't have to use the power switch all the time. I always do this so I don't have to go through the whole boot up process when I want to use it. I noticed that when I wake up in the morning the pad is dead or almost dead. Is there a better way to put this to sleep at night? There is always so much stuff running that kills the battery. I read on here somewhere that someone was not even losing 1% by putting it in some deep sleep. Is there a mode for long time sleep that does not use battery or run any processes? But without shutting it down all the way.
Sent from my Toasted Marshmallow using xda app-developers app

Toasted Marshmellow?
Can't you just set the tablet to sleep in 5 or so minutes after being inactive?
You can have the tab cut wifi off in sleep also.
I don't do the wifi off in sleep tho...sometimes it doesn't reconnect after a wake up.
I don't know what awesome off is...I'll have to check that out.
My tab just goes into sleep after 10 minutes when I set it down.

The problem is awesome off. It won't let the pad sleep and is constantly checking for movement, light levels etc. Dump it and use the power button to turn it off and on.

Battery dies
dpshptl said:
I use awesome off to turn my pad on and off so I don't have to use the power switch all the time. I always do this so I don't have to go through the whole boot up process when I want to use it. I noticed that when I wake up in the morning the pad is dead or almost dead. Is there a better way to put this to sleep at night? There is always so much stuff running that kills the battery. I read on here somewhere that someone was not even losing 1% by putting it in some deep sleep. Is there a mode for long time sleep that does not use battery or run any processes? But without shutting it down all the way.
Sent from my Toasted Marshmallow using xda app-developers app
Click to expand...
Click to collapse
I have Nook color power button donate that I got when I had my old rooted Nook color with flaky on off switch. It was in my google apps when I was loading apps on my infinity so I figured try it and see what happens lol It works remarkably well on my tab and does put it into deep sleep . See attached. I have not used my tablet much in last day but you can see that it does put it to sleep and turns wifi on and off and also reboots. Also BTW I then tried it on my rooted ICS leak Bionic and it gives reboot function instead of the long drawn out shut down then turn on process. It does not speed up any of these functions as far as rebooting.

Could be the "wifi location drain"-bug with google maps. From reading the forums it seems quite a few people have it without knowing it. You can of course disable wifi while sleeping, but this will not cure the main issue.
Turn the location settings on in google maps, then make sure that unneeded check boxes are disabled under location settings menu and you should be fine after that. The interesting part here is that google maps will drain the wifi even when the settings are not enabled, perhaps because you can't access the underlying menu without first enabling it. So only after you first enable this setting in maps will it work correctly.
Hopefully this helps, it did for me ..

Yoop,
I watched the awesome off YT video and it didn't look as though the tablet was being sent into full sleep.
I guess with it just grinding away essentially not shut down into a battery save mode it would die.
Doesn't the Tegra3 have a 5th core for minimum power processing or fast wake up?

[Q] Battery drain with dock during sleep (Cromi-X 5.4)

This topic has been up a couple of times before, perhaps most interestingly discussed in this thread.
It appears the problem still exists (asusdec_wake kernel wake), and I'm experiencing extreme battery drain during sleep with the dock attached. Currently running Cromi-X 5.4, and I have tried hunds 3.4.4, and _that 8 and 9 kernels.
It appears to behave as following: The tablet enters deep sleep with low battery drain (0.3% per hr with wifi off), and after a while (have seen it happen after a range of 1 - 5 hours) it starts draining quickly as asusdec_wake wakes the tablet up. It only occurs when the tablet is docked, it can occur at both high charge levels and when the dock is empty (mine always drains to 0%). It does not seem to matter whether wifi is on or off. I monitor the battery with better battery stats.
It's a real pity, since I have to turn the tablet off whenever I want to keep the dock attached.
Is anyone else experiencing this drain? Any suggestions for fixes?
Also: obligatory first post thanks-for-making-my-tablet-great to @sbdags, @_that and all the other contributors to Cromi :good:

rkha said:
It appears to behave as following: The tablet enters deep sleep with low battery drain (0.3% per hr with wifi off), and after a while (have seen it happen after a range of 1 - 5 hours) it starts draining quickly as asusdec_wake wakes the tablet up.
Click to expand...
Click to collapse
How do you know that it first enters deep sleep and that it's woken up later?
asusdec_wake is a wake lock which only keeps the tablet awake, so the question is what causes the wake up and keeps the wake lock?

_that said:
How do you know that it first enters deep sleep and that it's woken up later?
Click to expand...
Click to collapse
It might be a strong assumption, but it's based on the battery drain patterns I've seen. I've tried to monitor this a bit the last few days. Usually the battery drain is as expected during sleep for a while (whenever I check during this period, the asusdec_wake has not been active and the entire period the tablet has been in deep sleep), before it increases and stays high. I attach some screen shots where this can be seen. The change in slope in the battery graph is after about 7 hours. In those screen shots the deep sleep time reported by bbs was 6h24m. I'm not sure the reason for suspend_backoff, but I assume something is forcing the tablet to stay out of deep sleep. If I disconnected the tablet, there are no issues with suspend_backoff (and naturally not with asusdec_wake either).
_that said:
asusdec_wake is a wake lock which only keeps the tablet awake, so the question is what causes the wake up and keeps the wake lock?
Click to expand...
Click to collapse
Good point. Any tips on how this can be diagnosed?

rkha said:
It might be a strong assumption, but it's based on the battery drain patterns I've seen. I've tried to monitor this a bit the last few days. Usually the battery drain is as expected during sleep for a while (whenever I check during this period, the asusdec_wake has not been active and the entire period the tablet has been in deep sleep), before it increases and stays high. I attach some screen shots where this can be seen. The change in slope in the battery graph is after about 7 hours. In those screen shots the deep sleep time reported by bbs was 6h24m. I'm not sure the reason for suspend_backoff, but I assume something is forcing the tablet to stay out of deep sleep. If I disconnected the tablet, there are no issues with suspend_backoff (and naturally not with asusdec_wake either).
Good point. Any tips on how this can be diagnosed?
Click to expand...
Click to collapse
Try turning location services off completely for me in settings.
Does that help? Give it a reboot as well.

sbdags said:
Try turning location services off completely for me in settings.
Does that help? Give it a reboot as well.
Click to expand...
Click to collapse
Yes it did, thank you! 21 hours, only 3% down and asusdec_wake inactive. I will report back if things change.
Will add always turning this off when tablet screen is off to Tasker. Interesting that it caused this huge battery drain, given that gps and wifi was off anyways. Wakeups from com.google.android.gms decreased from many to nearly none when turning off location access, perhaps it is sufficient to turn of google apps location access in settings.
Thanks again!

rkha said:
Yes it did, thank you! 21 hours, only 3% down and asusdec_wake inactive. I will report back if things change.
Will add always turning this off when tablet screen is off to Tasker. Interesting that it caused this huge battery drain, given that gps and wifi was off anyways. Wakeups from com.google.android.gms decreased from many to nearly none when turning off location access, perhaps it is sufficient to turn of google apps location access in settings.
Thanks again!
Click to expand...
Click to collapse
It's Google now constantly polling for your location as far as I can tell.

[Q] Excessive battery drain 5.0.1

I recently noticed after the latest update excessive battery drain as seen in screenshots posted below. I have tried a factory reset and then unlocked bootloader to root and added greenify to try help save my battery. Does anyone have any tips on what else to try?

Have you tried to figure out what the Miscellaneous drain is? At least on my tablet I don't have that category in battery usage.

MidgetMob said:
Have you tried to figure out what the Miscellaneous drain is? At least on my tablet I don't have that category in battery usage.
Click to expand...
Click to collapse
Miscellaneous is android figuring out the rest of the battery stats, it's normal for new devices.

Themaniacboy said:
Miscellaneous is android figuring out the rest of the battery stats, it's normal for new devices.
Click to expand...
Click to collapse
If by "new" you mean recently flashed/factory restored, then I'm not sure what to say. Even after flashing a recovery image I've never noticed that category. The only reason why I asked was because I assumed that was what you were referencing as being excessive.
If you were referencing the 24+ hour battery life graph shown in your screenshots, then that seems about right. Unfortunately the tablet has never been known to have stellar battery life unless it's on battery saver 24/7.

MidgetMob said:
If by "new" you mean recently flashed/factory restored, then I'm not sure what to say. Even after flashing a recovery image I've never noticed that category. The only reason why I asked was because I assumed that was what you were referencing as being excessive.
If you were referencing the 24+ hour battery life graph shown in your screenshots, then that seems about right. Unfortunately the tablet has never been known to have stellar battery life unless it's on battery saver 24/7.
Click to expand...
Click to collapse
Seems about right?! He had 7min 2sec screen on time. If thats "about right" to you... you need to RMA your tablet.
Clearly whatever "Miscellaneous" is, is his issue.

mackay508 said:
I recently noticed after the latest update excessive battery drain as seen in screenshots posted below. I have tried a factory reset and then unlocked bootloader to root and added greenify to try help save my battery. Does anyone have any tips on what else to try?
Click to expand...
Click to collapse
Ok, so I noticed the very same thing when I got my Shield, I haven't rooted (I had on KitKat to restore some backups, then didn't do it again in Lollipop yet). I contacted Nvidia's service via livechat and got this answer. It did some considerable difference, although I still think it's draining a little too fast, but my old tablet had a pretty strong battery so I was just spoiled by it it seems >.<
So here it goes:
Nvidia Shield Callibration: (this takes a while)
You will have to calibrate the battery for just one time and observe the device battery backup for 2-3days to see the changes.
1: Drain your Shield tablet battery by using it normally until it turns off by itself.
2: Power-on your Shield tablet, if it wakes up and if you see some power left, follow step 1.
3: If Shield tablet is now drained to the point it can't wake up, set the device to charge for 7-8 hours.
The device should remain off when you set it for charging here.
4: Unplug the charger after 7-8hours, power on and wait for the battery charge to drop down to 90-95%.
5: Once the device battery drops down to 90-95%, plug in the charger and charge for one complete hour.
6: Unplug the charger once the device is fully charged.
7: Go to Shield settings > Shield power control > Apps> select optimize all option.
8: Go to Shield settings > Shield power control > system>
• Set the brightness to auto.
• Change the sleep option to 2 minutes of inactivity instead of default 10 minutes inactivity.
• Change the processor mode to either optimized or Battery savings.
• Check the WiFi optimization on.
Observe the device performance and report to us if you are still facing issue with the battery backup..
And then they gave me some tips for better battery life in general, I follow them (mostly) and my battery seems to hold on decently:
1: Always use the Shield tablet charger and not the computer USB ports or any other charger as the power specifications vary from the device to device.
2: In case if the charger is missing, use the back port of the desktop computer to charge the device instead of front port.
3: Always remember to exit the application instead of tapping the home button which will continue to run the application in the background.
4: Restart your Shield tablet at least once in a week. This will refresh the device making it work faster and efficient.
5: Connect the charger only when the battery comes down to 15% and unplug the charger only when it reaches 90% or above. This will reduce the number of charge cycles which will make battery last longer.
6: Use a third party app manager like Clean Master and free the memory at-least once a day to keep the device running faster.
To notice if the battery is fully/optimally charged when the device is off, look for the led indicator next to the charging port. It should be green, indicating it is fully/optimally charged