Executive summary = You always want "Keep Wifi on During Sleep" set to "Always" if you care about your battery life.
In post #17 in the "P6210 - Huge Battery Drain on ICS" thread iosandroid found that setting "Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" caused battery drain. Since I feel this is big bug and my mom told me I'm special I thought I'd start a new thread with some more details on this problem, a more descriptive thread title to highlight this issue and a few questions of my own.
I have a Samsung Galaxy Tab 7.0 Plus (aka GT-P6210) WiFi only tablet that had HC (Honeycomb) when I first got it. To save battery I changed "Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" (actually think the wording was a little different back in the HC days, but you get the idea). I'm not sure if/how much this helped, but it didn't hurt my battery life.
Shortly after upgrading to ICS (Ice Cream Sandwich) I noticed my battery life was worse. Apparently I wasn't alone since "iosandroid" (see above) had the same problem and solution. That is, if you set Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" or "Only when plugged in" your better drains much faster when you're tablet is idle. How much faster? In my tests setting this to "Never" drained my battery by 3.10%/hour. If I leave this at its ICS default of "Always" my battery only drains at 0.27%/hour, OVER 10 TIMES BETTER (idle) BATTERY LIFE! See the bottom of this post for a listing of my battery drain tests.
By using "CPU Spy" I could see that with "Keep Wifi on During Sleep" set to "Never" my tablet would never go into deep sleep, but with it set to "Always" my tablet would spend almost all of its time in deep sleep. GSam Battery Monitor showed that "Kernel (Android OS)" was using up most of my battery when this problem is occurring.
This problem isn't limited to ICS, I also got the same results with JB (Jelly Bean). Specifically I used "AOKP Jelly Bean Milestone 1". With stock ICS the default setting is "Always", so only people that mess with their advanced settings will be affected by this. Note that I believe that an OTA upgrade from HC to ICS will retain your previous settings for this. In JB (at least AOKP JB), this problem will have a much wider reach since "Keep Wifi on During Sleep" defaults to "Never".
Now on to my questions:
-Does anyone know the scope of this bug? Does it only affect the P6210, or Samsung devices, or every Android device? iosandroid reported having the same problem with his phone.
-Do I have to open a tech support case with Samsung to report this bug, or is there a better way?
[Battery Drain Tests]
VERSION Keep Wifi on During Sleep? DRAIN RATE
----------------------------------------------------------------------------------------------
HC Always 1.00%/hour (lost 2% total over 2 hours)
HC Never 0.50%/hour (lost 1% total over 2 hours)
ICS Always 0.27%/hour (lost 2% total over 7.5 hours)
ICS Never 3.10%/hour (lost 24% total over 7.75 hours)
JB Always 1.0%/hour (lost 1% total over 1 hour)
JB Never 3.52%/hour (lost 81% total over 23 hours)
-Legend
--HC = Stock Honeycomb (Android 3.2)
--ICS = Stock Ice Cream Sandwich (Android 4.0.4)
--JB = AOKP Jelly Bean Milestone 1 (Android 4.1.2)
-Setting "Keep Wifi on During Sleep?" to "Only when plugged in" behaves the same as "Never" (i.e. it has same battery drain problem)
-Yes, I know my testing time periods vary wildly, but I'm too impatient to wait a day for each of the tests. For example I'm sure JB's "Always On" loss rate is much closer to ICS's.
All I can say or add to this my tenderloin HP touch pad running cm is the same keep wifi on always drains the battery slower than never.
IMO, it would be because of 3G activating when the wifi turn off during sleep.
Try doing your test in Airplane mode to isolate the activation of the Phone radio and stick only to WIFI during your comparison test.
EDIT: ooops! sorry, it just occured to me that you've got a P6210 and not a P6200. My bad.
Airplane mode uses more battery than WiFi always on
viper001 said:
Try doing your test in Airplane mode
Click to expand...
Click to collapse
Yup, my tab is WiFi only. However I did actually test it in airplane mode and found that the battery lost 0.40%/hour (lost 11% total over 27 hours) with airplane mode enabled. This is still worse than the 0.27%/hour you lose when you just leave WiFi on (Keep Wifi on During Sleep? set to Always). This airplane mode battery drain was also unexpected to me, but in googling it seems like this is a common problem.
One last test I did was to manually turn the WiFi off. When I did that the battery only drained at a rate of 0.11%/hour (lost 1% total over 9.5 hours). I should test that longer to get a more precise number, but my short test was good enough to show that manually turning WiFi off does actually save power (it's about time something worked as I expected it to .
My next planned test it to use something like AutomateIt to automatically turn off the WiFi after the screen turns off to see if I can automate the WiFi battery savings.
My GT-P6210 also has the same issue after installing Elements HD rom. I never had this issue even after upgrading from honeycomb to ICS stock.i
jim-j said:
Yup, my tab is WiFi only. However I did actually test it in airplane mode and found that the battery lost 0.40%/hour (lost 11% total over 27 hours) with airplane mode enabled. This is still worse than the 0.27%/hour you lose when you just leave WiFi on (Keep Wifi on During Sleep? set to Always). This airplane mode battery drain was also unexpected to me, but in googling it seems like this is a common problem.
One last test I did was to manually turn the WiFi off. When I did that the battery only drained at a rate of 0.11%/hour (lost 1% total over 9.5 hours). I should test that longer to get a more precise number, but my short test was good enough to show that manually turning WiFi off does actually save power (it's about time something worked as I expected it to .
My next planned test it to use something like AutomateIt to automatically turn off the WiFi after the screen turns off to see if I can automate the WiFi battery savings.
Click to expand...
Click to collapse
If you know how, try looking into the build.prop. you'll find that stock wifi. supplicant_scan_interval=15. try a higher number like 90 or 180. this basically lengthens the time for wifi network searches from 15 secs to 90 or 180 seconds respectively.
As Krusty the Clown says, "it's not just good--it's good enough"
viper001 said:
If you know how, try looking into the build.prop. you'll find that stock wifi. supplicant_scan_interval=15. try a higher number like 90 or 180. this basically lengthens the time for wifi network searches from 15 secs to 90 or 180 seconds respectively.
Click to expand...
Click to collapse
I could probably figure out how to change that, but I've decided that just leaving WiFi on all the time gives me good enough battery life. I enjoy troubleshooting these types of technical problems, but unfortunately I must return to debugging my three year old daughter's Dravet Syndrome. Her cognition is deteriorating, so I'm hoping to find a solution or workaround soon. If any of the multimillionaires that read this forum want to fund a cure for Dravet Syndrome, head on over to dravet.org or dravetfoundation.org
I've got this issue on a Chinese Tablet running JB 4.1.1. After some investigation the conclusion I've reached is that the settings are mislabled on the GUI. "Always" results in disconnection from the SSID 15 minutes into sleep (although WIFI is still 'ON'). "Never" keeps WIFI on and connected indefinitely, and if autosync is also on you'll get lots of wake-locks and reduced standby battery life, particularly if you have location reporting on and google maps installed.
neu - smurph said:
I've got this issue on a Chinese Tablet running JB 4.1.1. After some investigation the conclusion I've reached is that the settings are mislabled on the GUI. "Always" results in disconnection from the SSID 15 minutes into sleep (although WIFI is still 'ON'). "Never" keeps WIFI on and connected indefinitely, and if autosync is also on you'll get lots of wake-locks and reduced standby battery life, particularly if you have location reporting on and google maps installed.
Click to expand...
Click to collapse
Interesting results, but that wasn't my experience. For example with WiFi always on my tablet does stay connected to the network all the time. All of these weird issues is about enough to make you want to buy an iPad.
Related
I have trouble downloading large files using this ROM since when my screen turns off, WIFI is also disabled. How can I change it. I've been looking in the settings but to no avail.
Edit: Found it...you have to click menu when in the WIFI Settings, then choose advanced.
Edit2: Wifi is disabled when screen is turn off even if the Wifi sleep policy is changed to Never.
Any ideas?
then that is some kind of bug. because setting wifi sleep policy to never should behave as such.
related note, setting wifi sleep to never greatly increases batteyr life, as said thru the forums, because back on 3g the data kills your battery much faster. so allowing wifi to stay on makes a huge improvement on battery.
for example if you leave wifi on overnight, you might lose 5% total. but if it switches back to 3g overnight, you might lose 20%.
is this bug confirmed?
me too have same problem with SuperAosp (i will test with other rom....)
First and foremost let me say that I love this phone. But I am having an issue with serious battery drain that's occurring when I have WiFi on. I need to use WiFi Calling in my house,and it worked flawlessly on my previous mytouch 4g, running under the same conditions. In fact, my wife now has that phone and it works great, we actually manage to save a ton of battery with wifi calling turned on.
So when I got the Sensation I hoped for more of the same, great battery life when at home due to wifi calling. However, that is not the case, when I have wifi on, with or without wifi calling enabled, my battery drains at a rate of about +-10% an hour! And thats with out even touching it! Without wifi on, 2-4% per hour battery drain.
Speeds when I do things over wifi are blazing fast, and the signal is full bars, so I know the phone is not searching for the wifi. With wifi, and minimal use, I max out at 5-6 hours! Not sure what to do, as not using wifi is really not an option.
One other thing, coming from the mytouch 4g, a highly underrated phone imo, I do see some lag that wasnt present in the "lesser" phone. In particular, the USA Today app, for example, on the Mytouch scrolling was smooth as butter, not so much on the sensation, I also see it in the Android market when I look at my apps, same app list on both phones, mytouch scroll is smooth as can be, Sensation is very jittery.
Maybe someone has some thoughts, or is having similar issues, cause I am so jealous of all the "OMG my battery lasted 6 months" posts!
Thanks in advance!
Because the phone comes stock with the WiFi sleep policy set to never. In my opinion that's a stupid decision on HTC's part. Easy fix though. Go into Wireless settings and clock on WiFi settings. Then click the menu key and click advanced. You will see the WiFi sleep policy menu. Just change it to "Never When Plugged in" or after 15 minutes. If you change it to Never when plugged in then the WiFi will go into sleep mode when ever you turn your display off.
Ive had it set to the 15 minute setting, but I thought that the wifi calling would block wifi from sleeping. Once when looking at the battery screen, I zoomed either on wifi or wifi calling, and it said something to that effect.
mlish420 said:
Ive had it set to the 15 minute setting, but I thought that the wifi calling would block wifi from sleeping. Once when looking at the battery screen, I zoomed either on wifi or wifi calling, and it said something to that effect.
Click to expand...
Click to collapse
Sorry, I forgot you said you use WiFI calling. That might have something to do with it. I always keep mine of so it doesn't matter if my WiFi sleeps right away.
Wifi can't sleep!
I don't know if i should start a new thread but this was the closest to my problem I could find.
Basically I'm having the same WiFi battery drain issues, and I tried to do the usual Wifi Sleep 'after 15 mins' or 'Never When Plugged in' options in the advanced menu but it always reverts to just 'Never' after a few minutes.
On my power graph it shows that I have had continuous wifi on despite changing the settings. So its not just the option returning to default when i open the menu either.
I'm really confused here, is there something forcing my wifi to be on all the time?
Any help is much appreciated.
Make sure wi-fi best performance is not checked. That will drain battery faster also
Ok, so I've been reading a lot about how people are experiencing battery drain on their TF tablet and TF dock. I wasn't experiencing any battery drain overnight until I installed a bunch of apps and played with many settings. So recently, I would see my tablet go from 80% battery to ~60% battery while I slept (around 10 hours of being turned off).
I checked on the Asus Weather widget and it was set to refresh every 4 hours. I turned that off and set it to refresh only manually. Now my battery goes from 91% to 91% (after 10 hours). I've tested this two nights in a row now so I think I've fixed my battery drain issues. Anyone else experience these results?
Other settings I have:
Wi-Fi sleep policy set to turn off when screen turns off.
Does no one have this issue with the Asus Weather Widget? Does no one care about battery drain?
Dear ScubaSteveo
I have such query also, last night 95% before standby with the wifi sleeping, however, when I woke up and checked only left 72% within 9 hours.
So, I untick the Asus weather auto update and changed to manual also.
I will actually switch off the wifi before sleep tonight to test.
I upgraded to 3.2 just two days before, so I don't know much about the wifi problem and battery problem.
But I am quite sure only wifi could cause such battery draining.
It may be not the Asus weather causing the problem, maybe the setting of "screen off with wifi sleeping" actually doesn't sleep the wifi.
I have heard a lot 3.2 with a lot wifi and battery problems...hope Asus finds out and solve the problems.
I still think it's the Asus Weather Widget because as soon as I turned off the refresh setting and changed it to Manual refresh, I stopped seeing the battery drain.
Let me know if you see your battery do better after switching to manual.
I saw a similar improvement when switching from the 4 hr default to manual. I tested it last night and saw 10% drop in dock battery in ~10hrs, where before it was about 2-3% / hour.
B50 tablet and dock, 3.2 stock, battery saving mode test does not work
chupig said:
But I am quite sure only wifi could cause such battery draining.
It may be not the Asus weather causing the problem, maybe the setting of "screen off with wifi sleeping" actually doesn't sleep the wifi.
I have heard a lot 3.2 with a lot wifi and battery problems...hope Asus finds out and solve the problems.
Click to expand...
Click to collapse
I now have to agree with you. I've tested the Asus Weather Widget (still on manual refresh) with Wi-Fi sleep policy set to turn off when the screen turns off, and I have around 3% battery drain per hour. Apparently I have had Airplane mode on for a while so WiFi was not activated while I was sleeping.
This is not good.
So why the heck is the Wi-Fi not sleeping when it is supposed to??
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.
I have my Tf700 rooted but locked. I have been trying to just put the tablet to sleep rather than shut off (long boot times). With the sreen off and using Auto Airplane Mode by Don, my tablet is draining by 15 percent overnight (9 hrs).:crying: I'm using Battery Stats Pro. It shows that 'Cell Standby' is using >90% battery. I'm at work right now and my tablet is at home charging so am unable to post a screenshot
jcp2 said:
I have my Tf700 rooted but locked. I have been trying to just put the tablet to sleep rather than shut off (long boot times). With the sreen off and using Auto Airplane Mode by Don, my tablet is draining by 15 percent overnight (9 hrs).:crying: I'm using Battery Stats Pro. It shows that 'Cell Standby' is using >90% battery. I'm at work right now and my tablet is at home charging so am unable to post a screenshot
Click to expand...
Click to collapse
Where can I find this auto airplane mode app? Will it work on stock unrooted also? I have noticed "Maps" automatically gets turned on and used by WiFi after the jb update. Anyone know how to fix this? WiFi just stays on and drains the battery.
Sent from my SPH-D710 using xda app-developers app
winfan said:
Where can I find this auto airplane mode app? Will it work on stock unrooted also? I have noticed "Maps" automatically gets turned on and used by WiFi after the jb update. Anyone know how to fix this? WiFi just stays on and drains the battery.
Sent from my SPH-D710 using xda app-developers app
Click to expand...
Click to collapse
Play store: Auto Airplane Mode by Don
There's Battery Widget Reborn that will do this also. But then I'm using JuiceDefender Plus on my 3 devices. Works pretty well on my TF700, there's a "night mode"... My tab hardly loose any juice over night. Maybe try one of those...
acme99 said:
There's Battery Widget Reborn that will do this also. But then I'm using JuiceDefender Plus on my 3 devices. Works pretty well on my TF700, there's a "night mode"... My tab hardly loose any juice over night. Maybe try one of those...
Click to expand...
Click to collapse
I have Juice defender Ultimate installed. The problem is that I want the tablet to deep sleep every time I put it in standby. I am still losing 90% of battery to 'cell standby" even with juice defender.
Anyone have an idea about the maps issue?
Sent from my SPH-D710 using xda app-developers app
"90%" Does not mean it drains 90% of your battery.
It means 90% of the current battery drainage belongs to that process. So 90% of the 15% battery drain comes from Cell Standby, the remaining 10% are other processes (usually Screen.). So something else is draining your processes.
Cell Standby is the same as Idle Processes on Windows: Nothing.
It should use about 1-3% per night even without 3rd party airplane mode. So, based on not using that, which of these do you have enabled:
WiFi (Especially the "Keep during sleep" setting. Even with WiFi toggled off, this keeps running undetected. Same goes for USB Ethernet.))"
GPS
Power saving, Balanced or Performance mode?
Power Saving in settings
Auto brightness
Location services (settings --> location services), any of the settings in this menu.
Ever used a USB Ethernet adapter?
Using any overlay apps? (handwriting, graphic effects, alarm etc?)
Does the tablet's location get very cold overnight? Lithium-Ion batteries hate the cold, drains them 10 times as fast.
ShadowLea said:
Cell Standby is the same as Idle Processes on Windows: Nothing.
Click to expand...
Click to collapse
Idle is called "Tablet idle" on my TF700. "Cell Standby" sounds like the connection to a mobile network, which should not even run on a wifi-only device.
_that said:
Idle is called "Tablet idle" on my TF700. "Cell Standby" sounds like the connection to a mobile network, which should not even run on a wifi-only device.
Click to expand...
Click to collapse
This was my first idea as well -- your 700 doesn't even have a cell connection, so this is a strange entry. Try using BetterBatteryStats or something alike, because the standard Android report of battery consumption is notoriously vague, and most of the times downright incorrect.
This harkens back to my SGS2 tweaking days in which loads of users were clamoring for tweaks to get the Android System consumption down from 99% -- "it is killing my battery" -- even when they had less than 2% overall consumption overnight. LOLOLOL!
These are high-powered devices, people -- if you'd want two weeks of standby time, you should have hunted down an old Nokia Communicator.
I still find a 15% drop in 9h of stand by time a bit high. Mine is a lot less than that...
ShadowLea said:
"90%" Does not mean it drains 90% of your battery.
It means 90% of the current battery drainage belongs to that process. So 90% of the 15% battery drain comes from Cell Standby, the remaining 10% are other processes (usually Screen.). So something else is draining your processes.
Cell Standby is the same as Idle Processes on Windows: Nothing.
It should use about 1-3% per night even without 3rd party airplane mode. So, based on not using that, which of these do you have enabled:
WiFi (Especially the "Keep during sleep" setting. Even with WiFi toggled off, this keeps running undetected. Same goes for USB Ethernet.))"
GPS
Power saving, Balanced or Performance mode? - Power Saving
Power Saving in settings
Auto brightness - off brightness at <30%
Location services (settings --> location services), any of the settings in this menu. -all off
Ever used a USB Ethernet adapter?- yes
Using any overlay apps? (handwriting, graphic effects, alarm etc?)- no
Does the tablet's location get very cold overnight? Lithium-Ion batteries hate the cold, drains them 10 times as fast.- not below 68F
Click to expand...
Click to collapse
I answered your questions in bold type face. thanks for your help
jcp2 said:
I answered your questions in bold type face. thanks for your help
Click to expand...
Click to collapse
Hm. Regarding the USB Ethernet adapter: Did you ever set the option "Keep during sleep"?
Reason I ask is because the moment I turned this on, it started draining my tablet+dock in a day, even without the adapter. Turned keep during sleep off and it went back to 1% a day. Never showed up in any battery monitor.
jcp2, do you have the TF700KL model version??
I will plug the usb ethernet adapter back in when I get home and see if the option "keep during sleep" is checked.(I only used the usb adapter twice.) I have the TF700T model.
Update.... I docked the tablet and plugged in the usb ethernet adapter. "keep ethernet awake during sleep" was checked. I unchecked it. I will let it sleep overnight and check the battery usage in the morning.
jcp2 said:
I will plug the usb ethernet adapter back in when I get home and see if the option "keep during sleep" is checked.(I only used the usb adapter twice.) I have the TF700T model.
Update.... I docked the tablet and plugged in the usb ethernet adapter. "keep ethernet awake during sleep" was checked. I unchecked it. I will let it sleep overnight and check the battery usage in the morning.
Click to expand...
Click to collapse
Fingers crossed, then.
Great news everyone! After following ShadowLea's advice about the unticking the USB Ethernet option for "Keep during sleep" (Which is only visible if you have the USB Ethernet adapter plugged in BTW) I am very happy to report that my tablet lost only 2-3% over a 9 hour period overnight. :victory: Thank you very much everyone, especially ShadowLea for the heads up! :highfive: :good:
Glad it's solved
Send from my Samsung Galaxy S3 using Tapatalk 2
Same problem here, except even more extreme. My battery dropped from ~90% Tab + ~30% Dock to 24% Tab and a dead dock overnight. The culprit for me also appears to be cell standby at 90% of usage.
I do not have the KL model and so there is no cell radio, and have never used a USB to Ethernet adapter (didn't know that I could, I might try it out now that I know).
Keep WiFi on set to never
GPS Off
Power Mode in Balanced
Power Saver enabled after 30%
Location & Google Search the only location service enabled
No overlay apps.
Kept inside at a reasonable temperature.
I'll try turning off the Location & Google Search, but anyone have other ideas?
EDIT: See screenshot http://db.tt/ph1d0FVT
I keep Airplane mode checked
GPS off
location settings all unchecked
under ASUS customized settings: check "mobile dock battery saving mode" and also check " disconnect network during sleep" , Uncheck "enable smart backlightlighter adjustment"
These settings cured my battery drain problem. Good Luck!
There is a known bug with Location Services that causes battery drain, as it keeps checking for a signal, even with WiFi and the app off. Turn it off