Database Users

Everyone with Battery problem post info here fix soon

Ok, although I do not have a solution it seems that their are a small percentage of people on here that have the same problem as me.
This is what I know:
The EVO has a bigger display, a faster proccessor, 4G, and alot of advanced features this means battery is not going to be the greatest.
However, I am now rooted running CM6 RC2, and although I love this ROM I have been having terrible battery. Also, I was using Fresh's and stock unrooted ROM and had bad battery also, AFTER I PUT IN ALL MY SETTINGS.
When I would hard reset my phone, it would sleep like normal, and the battery would run great, however, I think their is a setting that I use with my phone that is keeping it awake.
Now I am going to give all the settings that I use on my phone without installing any apps from the market. Because I know some apps keep your phone awake but I did a factory reset, put in my settings without installing any apps and my phone stayed awake.
***I have already tried the HTC and Sprint method of "conditioning your battery" I know their are 2 methods I have done both. I have setCPU, juice defender, spare parts, all that stuff that supposedly saves battery, but so far none have helped. Also my phone is set to auto CDMA, i tried that*****
Here is what I think. I am changing some setting in the phone that is keeping it awake and I can't seem to find what it is, I had this same problem with google sync setting and thankfully someone helped me fix it and it solved the problem however, after that I am still having the issue.
Keep in mind I HAVE NOT INSTALLED ANYTHING FROM THE MARKET YET, I have only entered my settings in apps that came with the phone because I believe that is the culprit.
My settings
*#*#4636*#*#
Battery history, since last unplugged
running: 14.6%
Screen on: 10.4%
Phone on: 3.5%
Wireless and network
Airplane mode, wifi, bluetooth, tethering and portable hot spot VPN are all off
Under Mobile network
The options are: data enabled: Checked
data roaming: unchecked
System select (change the cdma roaming guide) options are either home only, affiliated networks, or automatic. I have automatic set.
Voicemail service my carrier
Nothing in the CM6 settings have been changed
Auto brightness, screen timeout 30 sec
Location: wireless network:checked
Use GPS sattelite: unchecked
Accounts and Sync:
Background data: enabled (checked)
auto sync: Enabled (checked)
Facebook-sync if off, I have not synced contacts with Facebook, and the problem I had last time was with google sync, I had google sync turned off and that kept my phone on. Now I have facebook sync turned off, COULD THAT BE THE PROBLEM?
Privacy: Back up my data-checked
automatic restore-checked
Mail settings, never update, I manually update.
News and weather is same thing, could google be trying to update even though its set not too and keep my phone awake?
Under facebook settings: refresh interval is set to never
Notifications are inactive.
About phone
Cell standby:37%
Phone idle:28%
Android system:20%
Voice calls:11%
Display:7%
If anything looks not right, or you think something as little as it may be may be causing the problem, even if it doesn't make sense please suggest it, I have tried everything, thanks.

Not to burst your bubble, but it's been pretty much proven that CM6 has unsatisfactory battery life.
Try Burnt Droid v1 + netarchy-toastmod kernel for optimum battery life.

I know,
but after reading through the thread it seems that about half of them half pretty good battery life, however I had poor battery with other roms, because something was keeping my phone awake.

I'm having a similar problem. On any ROM that's based of HTC's 2.2, my phone will run fine for about a day and then it will begin to stop sleeping. Once that happens the only way to get it to stop is to do a factory reset. What's funny is that using the exact same settings with CM6-RC2 I don't get the 100% awake issue. I've tried everything and can't figure it out.
I've tried turning off all automatic syncing, turning off network time and network location...didn't work. I deleted my Exchange account since I had heard that some people were having Exchange problems...didn't help. This last time around I didn't install anything from the market, it was just the stock apps. I did connect the phone to Sync in my truck and used it quite a bit before the problem cropped up.
I've got a sneaking suspicion that it's some kind background process that tries to run after a specified amount of time, but there's some kind of problem with the Sense-based ROMs that I've tried that won't allow it to run properly. So we need to figure out what the process is and either stop it from running in the first place, or figure out a way to take it out of the ROM so it isn't there to begin with.
I'm going to wipe everything and try installing Fresh 3.1.0.2 again. I'm going to try to remember to reboot my phone every night when I plug it in to charge and see if that helps. While it isn't ideal, it's way easier than having to do a factory reset every other day. I'll post back and let everyone know what happens.

[TIPS] How to make your G2's Battery last longer

Its time we need a thread like this to ensure every G2 user is getting the best out of their battery.
Here are my tips:
- WiFi: Should ONLY be ON when you are actually using it!
- WiFi Sleep Policy=NEVER: it takes more time and power to seach for a Wi-Fi AP than actually staying connected to it. Settings > Wireless & networks > Wi-Fi Settings > MENU > Advanced > Wi-Fi sleep policy > Never.
- Bluetooth: Should ONLY be ON when you are actually using it!
- Use 2G when possible: If you know you are in a area with NO 3G support, than set your phone in 2G mode so it doesn't use power looking for 3G. Settings > Wireless & networks > Mobile Networks > 2G only
- Haptic feedback=OFF: I personally leave this OFF because minor vibrations are annoying plus consume battery. Settings > Sound > Haptic feedback
- Audible Selection=OFF: For obvious reasons, we use the touchscreen the entire time, enabling this will case battery drain everything you make a selection in Android, App, Web. Settings > Sound > Audible Selection
- Display - BRIGHTNESS=30%: I use about 30% brightness when indoors - when I am outside I turn it up brighter using Power Control widget. Settings > Display > Brightness.
Note: You can also leave it on AUTO, which is will provide optimal bnrightness with respect to ambient light.
- Display - Animations=Your choice: I personally have ALL of them enabled, but that is scarificing a small amount of battery power. If you do NOT need the pretty transitions, you can opt for other options. Settings > Display > Animation.
- Display - Screen Timeout=30: I leave mine at 30 seconds, as I think that's ideal for most situations. Settings > Display > Screen timeout.
- Location - Wireless networks=OFF : The phone uses tower and signal strength to calculate your APPROXIMATE location, which is a waste when you have GPS. NOTE: This feature assists in fiding your location indoors. If you plan on using GPS outside on than you should leave it OFF. Settings > Location & Security
- Location - GPS=ON: It should be ON if you plan on using MAPS or Navigation. NOTE: GPS is ONLY used when system needs it! Having it Checked OFF does NOT help battery life. The only time GPS is active is when you see the icon in the notification bar. Settings > Location & Security
MAJOR CONSIDERATIONS
- DATA - (3G/HSPA+) - Hogs the most battery, even more than the brightness of the phone. The reason for that is when you are surfing, searching, texting basically anythin that requires 3G/HSPA+ data the radio, CPU, and RAM are always working to ENCODE and DECODE data going in and out the device. This process requires all 3 major components to work simultaneously which draws more power from the the battery!
- Widgets - Widgets like facebook, twitter, weather, news do have processes running in the back which draw DATA depending on your refresh options. ie, You will draw less power if your facebook/twitter updates every 3 hours instead of 1.
- APPS - Always keep in mind that APPS like messengers and others which constantly need data DO run in the background. Background apps will draw DATA AS needed, which bring it back to the point above. Always make sure that you SIGN OUT of APPS that require background data, IF you don't plan on using them.
- Live Wallpaper - yes, it looks pretty as we all know it. Sadly, the truth is that both CPU and GPU are working hard in the background to bring a smile to your face when you look at the screen. Live wallpaper will affect your battery about 5 - 10%, dpepending on which one are you using.
- Vibration - Considered important as well.... if you are a CONSTANT texter/EMAIL-er AND you dont need Vibration, than you should turn it off. Vibration actually takes more battery power than actualy sounds.
- Volume - Should be considered important because the higher the volume the more battery power it'll take. If you can do just fine with a Mid-level volume than you should set ringer to mid level!
YOU SHOULD NOT USE A TASK KILLER APP
http://geekfor.me/faq/you-shouldnt-be-using-a-task-killer-with-android/
^^^ That explains everything about it ^^^
I'd be happy if one of the MODs made it a sticky, so we dont get Qs or reposts
and ofcourse I will also include any tips you guys have.... please leave a comment and explain why&how you think it saves battery life. I will than add it in this list

thanks for this.
auto-brightness works for me. also, wireless network location is kind of necessary because gps won't locate you when indoors. when you're indoors you don't really need an exact location anyway because you probably know where you are. but using wireless networks to get your approximate location enables you to quickly search for things nearby.
one more thing I might add - my G2 seems to constantly switch between edge and hspa. I think I recall this being an issue for the N1 too. if I'm not mistaken, switching taxes the battery. so I set the phone to only use 3G (or only 2G depending if I want to use less battery). you have to have Anycut. then crete a shortcut to "phone info." here you can control the radio behavior. WCDMA is 3G, while GSM is 2G.
also, question: anybody ever have any luck conditioning their battery? I keep hearing that it improves battery life but it's never really helped me

Thanks for the tips! Though, what are you sources saying that WiFi sleep uses more battery? Auto-brightness does work for me, it is just very slow to make changes and tends to be on the brighter side.

most of these tips are pretty much universal for most of the current and past android phones.
LET IT BE KNOWN the main reason for battery drain (slow or fast) is APPS. They drain more than talking on the phone. They also are the main reason your screen (the next big battery killer) would stay on. In other words, don't complain about battery usage if you're using your phone constantly throughout the day @ work or home. ITS NOT GONNA BE GREAT!

joebobjoe said:
Thanks for the tips! Though, what are you sources saying that WiFi sleep uses more battery? Auto-brightness does work for me, it is just very slow to make changes and tends to be on the brighter side.
Click to expand...
Click to collapse
As an Electrical engineer, I work with wi-fi chipsets... The process is that when wifi is "sleeping" it temporarily goes to OFF when you lock the phone. [exception: when not using apps like pandora]. So when you turn the phone back ON, WiFi turns back ON and searches for the AP you were connected to. >> this process of turning OFF, ON, and SEARCHING, requires a more battery power than staying connected. When you are connected the router and phone are exchanging information (packets) on AS needed basis like when we use 3G/2G.
i did try Auto Brightness, its a bit Bright for me, i'm gonna continue to use it for the next few days, see how I like it.

joebobjoe said:
Thanks for the tips! Though, what are you sources saying that WiFi sleep uses more battery? Auto-brightness does work for me, it is just very slow to make changes and tends to be on the brighter side.
Click to expand...
Click to collapse
Auto-brightness seems to be buggy on the software side. The light sensor is very quick to detect changes, but the brightness doesn't drop back once it goes up. I feel that the brightness gets set to full at too low of a light level too. Using a screen protector and case does help a little by blocking some of the light, but it's not enough.

Actually, having GPS on consumes battery even when it is not used. And quite a lot. I have seen mayor battery boost after I started to turn it off when I do not use it. (on G1).

I've done some monitoring with PowerTutor and noticed that the Facebook app significantly drains the G2's battery (even when all features are disabled). If you sign out of it you should notice a 2+ hour increase in your battery life. People in my other thread have confirmed this and I think it might be a bug with facebook 1.3.2. I recommend making a link on your home page to m.facebook.com instead of using the facebook app.
I have also noticed that the e-mail app (NOT G-MAIL), when using Exchange ActiveSync, drains a good bit of battery when used with a Hotmail account (I'm not sure if other exchange servers have this problem or if the problem is in the e-mail app itself). The remedy that I have come up with for this is to make a new G-mail account, set hotmail to forward to it, and then on the gmail website go to Settings-> Accounts and Import and under the Send Mail As: section, add your hotmail account to it and set it as the default.
This way you get g-mail's lightweight mail pushing (which is just as fast as exchange) and it's transparent to you and everyone who has your hotmail address.
Besides those two tips, I recommend using PowerTutor to diagnose any abnormally low battery life issues you may have. My power usage is way down after fixing these two problems. Once in PowerTutor, go to View Application Power Usage, set Time Span to total, disable LCD monitoring, and set Sort By to Energy usage. Reset the power profiler and lock your phone and let it sit idle for about 30 mins to 1 hr, and then look at the application power usage. PowerTutor will probably be the top one, but you should also see what other applications are sapping your battery life.
Note: PowerTutor itself drains battery, so you should not constantly run it. I think it is set to start automatically so you will want to go in to settings and turn that off.

funkadesi said:
Its time we need a thread like this to ensure every G2 user is getting the best out of their battery.
Click to expand...
Click to collapse
+1 Sticky Please.

pmstc said:
I've done some monitoring with PowerTutor and noticed that the Facebook app significantly drains the G2's battery (even when all features are disabled). If you sign out of it you should notice a 2+ hour increase in your battery life. People in my other thread have confirmed this and I think it might be a bug with facebook 1.3.2. I recommend making a link on your home page to m.facebook.com instead of using the facebook app.
I have also noticed that the e-mail app (NOT G-MAIL), when using Exchange ActiveSync, drains a good bit of battery when used with a Hotmail account (I'm not sure if other exchange servers have this problem or if the problem is in the e-mail app itself). The remedy that I have come up with for this is to make a new G-mail account, set hotmail to forward to it, and then on the gmail website go to Settings-> Accounts and Import and under the Send Mail As: section, add your hotmail account to it and set it as the default.
This way you get g-mail's lightweight mail pushing (which is just as fast as exchange) and it's transparent to you and everyone who has your hotmail address.
Besides those two tips, I recommend using PowerTutor to diagnose any abnormally low battery life issues you may have. My power usage is way down after fixing these two problems. Once in PowerTutor, go to View Application Power Usage, set Time Span to total, disable LCD monitoring, and set Sort By to Energy usage. Reset the power profiler and lock your phone and let it sit idle for about 30 mins to 1 hr, and then look at the application power usage. PowerTutor will probably be the top one, but you should also see what other applications are sapping your battery life.
Note: PowerTutor itself drains battery, so you should not constantly run it. I think it is set to start automatically so you will want to go in to settings and turn that off.
Click to expand...
Click to collapse
i think with exchange rather than having the user select the refresh interval (ie 30 mins, 1 hour) the system is a ALWAYS ON connection which constantly checks your e-mail. As oppose to G-Mail..... they as get PUSHED to your phone by google's servers every time you get an e-mail as oppose to an ALWAYS ON system.
There is a lot of hush going on about the facebook app draining the battery... hence I addressed the widget/app parts..... as of now I think we should wait for an update to see how things change, it is a software bug.

Location - Wireless networks=OFF
By turning this off won't you in turn be turning off assisted GPS?
IE - the GPS will not have an approximate location and begin locating from there but will rather have to cycle much further to dial in and take much longer to calculate your position?
Just asking - if you haven't noticed a difference then that's cool.

I also noticed shop savvy was taking up alot of my battery drain. Looks like it was running in the background non stop. I uninstalled it.

Isn't WCDMA the HSPA+ network and CDMA the 3G? I currently have mine set to edge only since the speeds are slow all across the board in my town. Even on the phones down at the tmobile store. Hoping its just a minor tower issue in my area.
Sent from my T-Mobile G2 using XDA App

funkadesi said:
i think with exchange rather than having the user select the refresh interval (ie 30 mins, 1 hour) the system is a ALWAYS ON connection which constantly checks your e-mail. As oppose to G-Mail..... they as get PUSHED to your phone by google's servers every time you get an e-mail as oppose to an ALWAYS ON system.
There is a lot of hush going on about the facebook app draining the battery... hence I addressed the widget/app parts..... as of now I think we should wait for an update to see how things change, it is a software bug.
Click to expand...
Click to collapse
Exchange activesync should push email. I had set it to push and hotmail supposively supports this. Even if it doesn't, I tried setting it to polling and it still seemed to use a decent amount of battery life. Anyways something is wrong with activesync pushing.
Sent from my T-Mobile G2 using XDA App

funkadesi said:
i think with exchange rather than having the user select the refresh interval (ie 30 mins, 1 hour) the system is a ALWAYS ON connection which constantly checks your e-mail. As oppose to G-Mail..... they as get PUSHED to your phone by google's servers every time you get an e-mail as oppose to an ALWAYS ON system.
There is a lot of hush going on about the facebook app draining the battery... hence I addressed the widget/app parts..... as of now I think we should wait for an update to see how things change, it is a software bug.
Click to expand...
Click to collapse
Exchange uses Activesync, which pushes messages as well. The ongoing sync is for contacts and calendar items which if you do not make a lot of changes, change to off and sync then yourself manually.

markdurant said:
Exchange uses Activesync, which pushes messages as well. The ongoing sync is for contacts and calendar items which if you do not make a lot of changes, change to off and sync then yourself manually.
Click to expand...
Click to collapse
I had turned all Syncing off besides mail and it was still eating battery on push mode... just something to keep in mind for Activesync users who are experiencing abnormally low battery life

raqua said:
Actually, having GPS on consumes battery even when it is not used. And quite a lot. I have seen mayor battery boost after I started to turn it off when I do not use it. (on G1).
Click to expand...
Click to collapse
GPS ONLY uses battery when it is in use. You will know this because the icon will appear when it is being used. It doesn't use battery just being on. WiFi and Bluetooth do because they have to constantly "keep their eyes open" for things like networks and bluetooth devices that want to pair/communicate.
ddgarcia05 said:
I also noticed shop savvy was taking up alot of my battery drain. Looks like it was running in the background non stop. I uninstalled it.
Click to expand...
Click to collapse
I noticed this too on other Android phones but not on my G2. It would just show up in Battery Use even though I wasn't using it. If you want to see what is keeping your phone awake you can use the hidden Battery History menu. The "partial wake usage" is usually a big contributor for bad standby times. You could also try changing from WCDMA Preferred to GSM Auto PRL. This helps some people.

khaosxiii said:
Location - Wireless networks=OFF
By turning this off won't you in turn be turning off assisted GPS?
IE - the GPS will not have an approximate location and begin locating from there but will rather have to cycle much further to dial in and take much longer to calculate your position?
Just asking - if you haven't noticed a difference then that's cool.
Click to expand...
Click to collapse
A lot of people have been reporting that this feature as of NOW updates every hour, regardless of which services/apps need it. If you ask me, I haven't noticed any significant amount in the time it takes to get GPS location having that feature turned OFF. If you do a cold start (i.e. restart your phone) than the GPS will take a couple of more seconds to initialize for the first time use. However, from than on everytime you use the GPS it shouldn't take more than 10 seconds to acquire your position.

hah2110 said:
I noticed this too on other Android phones but not on my G2. It would just show up in Battery Use even though I wasn't using it. If you want to see what is keeping your phone awake you can use the hidden Battery History menu. The "partial wake usage" is usually a big contributor for bad standby times. You could also try changing from WCDMA Preferred to GSM Auto PRL. This helps some people.
Click to expand...
Click to collapse
Could you explain more about this settings, and how would one get to this setting.... If it helps save the battery I'll add it to the list

funkadesi said:
Could you explain more about this settings, and how would one get to this setting.... If it helps save the battery I'll add it to the list
Click to expand...
Click to collapse
Sure... At the phone menu (must be the native dialer), dial *#*#4636#*#*. Then chose Battery History and you can use the drop downs to control what you view. If you go to "phone information", you can change the preferred network type. Here you can force 3g only, etc. WCDMA Preferred fights to get a 3G signal and keep it. GSM Auto PRL uses a downloaded list to choose whether to use 3G or 2G, thereby saving battery in certain cases.

Google maps power drain

I have updated google maps to the latest update yesterday and now google maps has 2 processes constantly running/sitting in memory and power consumption went up a lot. Battery usage also shows now that google maps is using quite a bit of power, which never happened before. Has anyone noticed the same thing or is it just me?

have you logged into Lattitude?

Nope, I never use Latitude. Just checked and it is off.
Actually I have just uninstalled the update and was able to kill maps process and it didn't come back. Then installed it back and now, even if I kill google maps in the running apps manager, it immediately comes back

Well, THAT happened/happens on mine from the very first beginning even with no maps-update after unboxing and I received one of the first batches of SGS II in Europe.
But since I do not have a batt drain prob (even with heavy use my SGS II lasts minimum 24 hrs) I did not mind maps consuming SOME power ................
.......... and BTW I wouldn´t know how to stop maps-proc since I am (still) not rooted...............

Mine stops eating battery if I disable "use wireless network" under "Location and security". But of course it takes longer to locate me since it needs to get a GPS fix each time I use Maps.

Lupusoff said:
Nope, I never use Latitude. Just checked and it is off.
Actually I have just uninstalled the update and was able to kill maps process and it didn't come back. Then installed it back and now, even if I kill google maps in the running apps manager, it immediately comes back
Click to expand...
Click to collapse
BlueScreenJunky said:
Mine stops eating battery if I disable "use wireless network" under "Location and security". But of course it takes longer to locate me since it needs to get a GPS fix each time I use Maps.
Click to expand...
Click to collapse
That was the pair of tips I used to get the use I needed with no background process killing my battery. don't update the app for now until I hear the issue is sorted and only use the GPS, not wireless network, to navigate. The latter part is fine as the GPS lock is so fast anyway - usually about a second or two to be down to about 60ft or less.
The extra bonus is that if I'm out with only a 3G connection then dropping the wireless part under "location and security" also stops the wireless services from kicking in on the back of the maps system trying to use it for location. I can be using my phone all day and not have "wi-fi sharing" pop up and start gobbling up %'s even by the end of the day.

I got same issue - Maps process starts randomly and stays up for long time last time I saw it it was 125h consuming up to 14% of battery :/ quite annoying if you kill the process it pops up back again right away...

That Latitude stuff is horrible for battery.
Settings- Applications- Manage Applications- All- Maps- Clear Data.
Regards.

Possibly the cache map tiles in advance (forget the exact title) in the maps menu is checked and is downloading even when you don't have maps open?

Just disable "use wirelrss network" in settings...it should do the trick...seems like it updates your location continuously when you set that feature on....you can always turn it back on when you actually have to use maps....
My problem is that the battery used by gps nd google maps is enormous.... :-(
Sent from my GT-I9100 using Tapatalk

Frustrating battery problems

/I posted this in another thread but I'm desperate for help at this point.
At one point last week, my Nexus 7 had been running on eight hours from a full charge, screen had only been on for 1:15 and Android OS had kept the device awake for almost five hours, and used 50 minutes of CPU total. My battery was at 71%.
After receiving advice to do a factory reset, I did so on Friday and my battery life improved dramatically over the weekend. Android OS was using a much less percentage and keeping the device awake less. My battery lasted over two days with +4 hours of screen time. But once I commuted to work this morning, my problems started again. Android OS' percentage used and time kept awake shot up and my battery is down to 61% in 22 hours (1:11 of screen time) and Android OS has kept the device awake for over 6 hours.
Is this an operating system problem? Does anyone else commute to work and use Google Now for public transit updates? I have Latitude updating off but otherwise all GPS, etc. is turned on.
I am absolutely baffled and would love some help. Thanks in advance.

crazygameofpoker said:
(...) I have Latitude updating off but otherwise all GPS, etc. is turned on. (...)
Click to expand...
Click to collapse
That seems to be the culprit. Try turning ALL options in the Location services off (Google's location service, GPS satellites, Location & Google search) and turn them only on when you need them.
This did the trick for me.
Otherwise use the tools CPU Spy and BetterBatteryStats (both available in the Google Play store) to get a better idea what exactly is causing the battery drain on your device.

Cybermancer said:
That seems to be the culprit. Try turning ALL options in the Location services off (Google's location service, GPS satellites, Location & Google search) and turn them only on when you need them.
This did the trick for me.
Otherwise use the tools CPU Spy and BetterBatteryStats (both available in the Google Play store) to get a better idea what exactly is causing the battery drain on your device.
Click to expand...
Click to collapse
Thanks for the response. That's probably my last resort. I mean, I bought this device because of features on Jelly Bean such as Google Now, which relies heavily on location services, and I have to turn all of them off? That disappoints me.
It's interesting to me that I had all of these services on at home over the weekend, yet it did not have this effect on my battery. Only because my device leaves the house should it freak out. That's a serious flaw.

crazygameofpoker said:
Thanks for the response. That's probably my last resort. I mean, I bought this device because of features on Jelly Bean such as Google Now, which relies heavily on location services, and I have to turn all of them off? That disappoints me.
It's interesting to me that I had all of these services on at home over the weekend, yet it did not have this effect on my battery. Only because my device leaves the house should it freak out. That's a serious flaw.
Click to expand...
Click to collapse
This may or may not help, but I too was having battery problems but narrowed it down to being only when I was away from any Wi-Fi connection whether I was connected or not. I think there is a bug whereby if the tablet cannot establish your location from nearby Wi-Fi access points, rather than giving up it just keeps on trying to the detriment of your battery. I solved this issue by using an app called Automateit to instruct my Wi-Fi to turn off when the screen is off (as it would be the majority of the time while travelling). These kinds of apps allow all kinds of qualifiers, for example my Wi-Fi doesn't turn off if Spotify is in focus as I am streaming music using Wi-Fi. Give this a go and see if it helps.

akalias1981 said:
This may or may not help, but I too was having battery problems but narrowed it down to being only when I was away from any Wi-Fi connection whether I was connected or not. I think there is a bug whereby if the tablet cannot establish your location from nearby Wi-Fi access points, rather than giving up it just keeps on trying to the detriment of your battery. I solved this issue by using an app called Automateit to instruct my Wi-Fi to turn off when the screen is off (as it would be the majority of the time while travelling). These kinds of apps allow all kinds of qualifiers, for example my Wi-Fi doesn't turn off if Spotify is in focus as I am streaming music using Wi-Fi. Give this a go and see if it helps.
Click to expand...
Click to collapse
Thanks. When I'm at work it stays connected to the same WiFi access point as far as I know.

Here's an update to the situation: I looked at my data usage over the last few days. Over the weekend, Android OS used virtually no data. Since then, it has used about 50 MB of data in the background. I work at a university so maybe it's trying to connect with other access points on campus even when I'm in my office. Any ideas? Thanks.
Edit: At work, the down arrow on my WiFi signal is constantly on, like it's always doing something. At home, not.

Google sync not letting phone go into deep sleep

so as of this week i've noticed battery drain..
I removed all APPs i recently installed and still drain no deep sleep.
Better battery stats never helps, all it says us "Suspend Backoff" for kernal wake lock but never tells me what is causing the wifi to be hit so much
i finally went into google sync options and unchecked ALL options and reset CPUSPY..
with in a few min im getting sleep.
i re enable all my google sync options and reset CPUSPY
no more deep sleep after a few min
now i enabled all sync again, and UNchecking each of them one by one to see which one is the culprit but its not just one.
sometimes its SoundSearch, sometimes its KEEP, sometimes its People Details..
doesnt make sense and i'm leaving the phone alone, i'm not adding or changing any data on the phone or the computer in KEEP, PEOPLE, GMAIL or MUSIC
so why is this happening?
I know a lot of people disable all their sync in here to get better battery life but of the people that still sync their google services automatically, is anyone seeing this?

Maybe something is preventing sync from completing successfully which causes sync services to be constantly on.
Personally I haven't faced the issues you have mentioned. Try clearing data of play store, Google services framework and play services.
Sent from my Nexus 4

use titanium freeze Google+, GoogleMusic, GTalk
should solve