HTC EVO 4G :: Wifi Is Disconnected When On Standby - Battery Drain
Oct 18, 2010
At home i've noticed that even though I have wifi on, it'll drain 15-20% of my battery over night (8 hours). When I turn the display on it'll show that there's no wifi connection available, but wifi is still enabled. After i turn the display on, it'll quickly connect to my wifi. Is this normal? How do i make it stay connected to my home wifi when the display is off/phone is in standby?
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Aug 21, 2011
i have some problems with battery life. The reason is the facebook for android app. I have already turned off the automatic sync, so the app shouldn't start itself but here is the partial wakeup spareparts shows me after a day of very light use (i have sometimes closed the Facebook process when i saw that my battery made jumps of 10% without touching it for an hour.
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Jun 18, 2010
has anyone noticed when you have the evo in standby with it unplugged the hard keys on the bottom are still on. hardly notice it but you get it in dark very dark room and you can see thats its still on almost like a glow
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Sep 20, 2013
I recently purchased this Tablet cum Phone Device (Asus Fonepad) in India. I found this device very impressive with decent battery backup along with great standby time. Everything was allright. In morning I found heavy battery draining during standby.
Next day I uninstalled that Black market application and Uninstalled Exdialer with all downloaded themes. I got full signals and everything was working fine. But the Battery Drain in standby remain same. I observed the situation till next two days. I searched to forums and did following things:
1. I made factory reset to my fonepad. which was haviing 4.1.2 Android after updating through OTA. Which remains same after Reset.
2. I didnt install any other applation
3. I turned of all battery comsuming services like GPS/ Location reporting/ Data/ Wifi/ Uninstalled Google Play Service Updates etc
4. Installed Wakelock detector, Better Battery Stats etc All are showing that phone goes in deep sleep no prblem but Wakelock detector show that Cell Radio wakes up so much time when phone is on sleep mode. Default Battery monitor of Android Showing "Mobile Data" as most battery comsumer.
One thing I want to mention here the device is supportive to mini sim only. I was not having mini sim so I went to market and mobile shop keeper cutted my Sim to adjust into that slot and it woked. I was using same sim from Day first. It's Vodafone INDIA.
I have not rooted nor flashed anything from my fonepad. I am reached to the conclusion that There is some problem with Exdialer installation and applying new/old theme combination to it which made me device with no signal. And now The Cell Radio has been changed which is attempting to achive something in standby mode. Which is causing heavy battery Drain. Standby time is reduced to almost 15-16 Hrous
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Feb 15, 2010
Just to clarify, is there in fact battery pull and drain from BT, Wifi and GPS even if you are not actually using them as there no app running needing them and no icon showing them active in the menu bar?
I am curious if they are sending out polling or searching signals and thus, still draw the battery down? It seem they must, agreed?
Is it a substantial pull? I kind of want to leave them all on, but have started the habit of having them off and just using a widget to turn each on - 1 by 1 - as needed.. but that is kind of a PITA and I wonder if it is not even necessary?
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Jun 3, 2013
Will toggling Wi-Fi on and off drain your battery? I'm asking this because I read:
[URL]...
Essentially, you want your Wi-Fi sleep policy to be "Never" because when the Wi-Fi sleep policy is "Always," your phone searches for Wi-Fi more often and that drains battery (I think that's what it is saying).
At the moment, I toggle the W-Fi on every time I'm using it and off as soon as I'm done using it in an attempt to save battery. I'm not sure if this actually works or it's actually draining my battery because it would search for Wi-Fi every time I toggle it on.
On my Samsung Galaxy S4, I can't find Wi-Fi sleep policy as mentioned in the article, but I found "Keep Wi-Fi on during sleep." Am I supposed to set this setting as "Always" to save battery life?
I toggle Air View and Smart Gestures on a frequent basis as well--not sure if I should do that too.
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Sep 30, 2013
I was wondering, if I set wifi off but I keep the global sync option on in the 4.2.2 tiles, does the apps will try to sync even if wifi is off, and then drain a little bit off battery ?
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May 8, 2010
I know the WiFi uses less battery than the 3G. My question is should I leave the WiFi on all the time if I only have WiFi at home? Will it be actively searching for a WiFi signal when I am out of range of my home network and drain more battery? I have the Network notification unchecked in the WiFi settings if that helps at all. Basically I just want to know if I should turn WiFi off when I leave my house.
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Nov 27, 2009
However I wonder if it is less of a battery drain to use my WiFi at home / work than to simply use the Sprint network / Ev-Do Rev A?
I figured that since it can read my WiFi easier, it might use less power, then again it is a function on the phone that needs to be launched and therefore might be draining more.
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Aug 2, 2010
What is your take on the WiFi sleep policy. I do like the fact that Wi-Fi can remain on all the time, but will it be a drain on my battery? Is it better to keep the Wi-Fi to sleep on screen shut off? I am near a Wi-Fi connection for most of the day and always at home.
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Nov 21, 2009
I think I figured out why sometimes my Droid stays on for 1.5 days and sometimes after 6 hour of just being idle the battery is drained.
When wifi is turned on an connected to a network, the cellular signal is way low and it just drains the battery.
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Mar 16, 2010
It seems that I have problem to leave Wifi on in order to get skype & SIP calls when the screen shutoff (black screen / idle)
I changed the "wifi sleep policy " to never but still i cant get incoming calls
I tested it several time even tried to ping it but it seems that it is disconnects after the screen shutoff.
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Apr 20, 2010
I have a WiFi network at work and it requires a New password generated from a secure token each time when I try to re-connect. Since Android WiFi setting remembers the password, if it try to re-connect using the saved password (it becomes invalid after disconnected), my secure token become invalid. If I remember to remove the connection each time after I disconnect, I can enter new password when the connection is discovered as a new connection again. The problem is what if I forget. In addition it is inconvenient. Do you know any Android application supports remove a chosen WiFi connection password each time the connection is lost?
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Oct 6, 2010
I have a service which polls a server at certain intervals. I use an AlarmManager and a BroadcastReceiver to start the service. My problem is that after a certain duration, even though the WiFi is still enabled, but for some reason, my application can't contact the server. I get an "Unreachable network" error. Note that I've already acquired a partial wake lock as well as a wifilock. Here's my code for the BroadcastReceiver.
public class ServiceAlarmBroadcastReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
WakeLock wakeLock = null; WifiLock wifiLock = null;
try { PowerManager pm = (PowerManager) context .getSystemService(Context.POWER_SERVICE);
// acquire a WakeLock to keep the CPU running
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakeLock");
if(!wakeLock.isHeld()){ wakeLock.acquire();
} Log.i("ServiceAlarmBroadcastReceiver", "WakeLock acquired!");
WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
wifiLock = wm.createWifiLock(WifiManager.WIFI_MODE_FULL , "MyWifiLock");
if(!wifiLock.isHeld()){ wifiLock.acquire();
} Log.i("ServiceAlarmBroadcastReceiver", "WifiLock acquired!");
context.startService(new Intent(context, ThePollerService.class));
} finally { // release the WakeLock to allow CPU to sleep
if (wakeLock != null) { if (wakeLock.isHeld()) {
wakeLock.release(); Log.i("ServiceAlarmBroadcastReceiver", "WakeLock released!");
} } // release the WifiLock if (wifiLock != null) { if (wifiLock.isHeld()) { wifiLock.release();
Log.i("ServiceAlarmBroadcastReceiver", "WiFi Lock released!"); } } } } }
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Apr 11, 2014
I am trying to get Tasker to turn Airplane mode when the wifi is disconnected IF theres no cell signal and then turn airplane mode off again agter 2 seconds. At the momnt this is what I got:
Airplane mode ON using Secure Settings.
Not Wifi Connected >[code]....
When I press the PLAY button on the task it does turns on Airplane mode but when I test it by turning off my wifi it shows that the Task is active but Airplane mode is not turned on.
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Sep 24, 2010
Many of us have experienced some battery life fall out since the last update. I mentioned this in the battery life thread but I thought it deserved it own topic. I have an app that I downloaded called battery status. it has a battery history. and it says time without sleeping 7h 10m 25s ago. Thats exactally when I unplugged my phone. This explains why I am seeing 2-3% per hour loss while not using the phone and while in airplane mode. Before the update I could keep the phone in airplane mode, not usre it, and leave work with over 94% battery life. So this proves that somehow the phone is not going into sleep mode... I can guarantee that everyone else in that is experiencing battery drain since the sept 16th update is due to this reason. The question is... why the hell is this happening and why won't the phone go into sleep mode?
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Oct 14, 2010
Has anyone noticed an increase in battey drain while using the Lookout Mobile Security app? I noticed my battery drain was a little higher than usual today. I also have an app called battery indicator installed and was wondering if those apps cause higher battery drain also?
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Nov 13, 2010
Rooted Droid 1, running LFY 1.9 with it's 1ghz kernel, SPRecovery. Had a weird issue recently; the phone displayed that my battery life was at 40%, then probably ~30 minutes later it was down to 20%. I wasn't using it during that time, I just unlocked the screen to check something. Anyway, I opened my browser and within a minute or two I got the "15% battery life remaining" message, prompting me to connect my charger. I decided I would allow the phone to just die and shut itself down. So I waited ~45 minutes and it went down to 10%, then almost immediately to 5%. I turned on the GPS just to make it drain faster... I watched a one-hour television show and when it was over, I glanced over to the phone to see if it had died - nope, still on. I turned the LED light on, leaving the GPS running for ~25 minutes and it finally powered down. Then I plugged it in to charge and left the room. Came back in about 2.5 hours later and picked up the phone - it was very hot. Unlocked the screen and checked SetCPU and it was running ~135?F but it immediately started cooling down. It was fully charged, however so I unplugged it. I went to bed shortly thereafter and the battery life displayed 90% as I set the alarm to wake me up the next morning. I happened to wake up shortly before the alarm was set to go off and I picked up the phone to disable the alarm and noticed the red 'charge me' light blinking - unlocked the screen to see 5% and just then it powered itself down.
TL;DR -- Phone only got hot that one time, phone hasn't gone dead in stand-by mode again like it did that night. Battery drains at a seemingly normal rate based on my regular use from 100% down to 40%, then it rapidly drains after that, always skipping 30% and when it gets down to 5% it stays alive for quite a long time under heavy load. Is there a way to 'teach' the phone how to check and calculate actual and remaining battery % and to display it correctly? Is it kernel-related? I heard somewhere about doing a 'battery wipe' but I am unsure what that entails and searches are proving fruitless for me so far.
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Aug 12, 2010
does battery status pro drain your battery life?
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May 7, 2010
I have a Motorola Milestone with Android 2.1. I'd like an app which shows the battery level in the notification bar. Nothing fancy, no estimation of remaining battery life nor fancy eye candy. If it can show a more precise reading than the Milestone built-in one, which only decreases in 10% intervals, fine, but only if this isn't a drain on the battery. I know there are several such apps, but which do you think is the best for my needs? There are so many it's hard to try them all and choose. I just want something basic and simple which doesn't drain the battery. I tried "battery indicator" and "battery status pro"; they both do what I need, but I'm afraid they might be an additional drain on the battery.
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May 14, 2010
When my phone goes into standby (is that the same as sleep mode, BTW?) is it still connected tothe internet ? If not is there a setting that will automatically disable it (I don't mind manually re-connecting it again)?
I don't have anything auto-synching, so I don't need to be connected while I'm not actually using it. (Just thinking of ways of saving valuable juice )
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Jun 28, 2010
I usually charge my phone before I go to bed and wake up to it in the morning somewhere between 93% and 97% battery left.
This morning when I woke up I was at 75%. I checked the battery usage history and the "Dialer" used 92% of battery since unplugged.
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Jan 14, 2010
Just got my Nexus One yesterday, and I'm loving it! My only concern is the battery life meter is telling CELL STANDBY 67%?? When you click on it, it says time without signal 50% and then it says thats whats causing battery consumption.
Before I go on, I have no issues with 3G, been getting a solid signal since I got the phone yesterday, just a little confused on what to do? Shouldn't standby SAVE battery?
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Apr 29, 2010
This is probably a really dumb question but my battery life info says that the android system is using 96% of my battery and standby and idle are both using only 2%. Is this a good thing or a bad thing? Should my standby time be higher? Or is it better that it is a low number when it is idle/on standby. First smartphone ever here and I just don't know if that is good for my battery or not.
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Jul 29, 2010
I charge my evo while I'm sleeping. Last night I went to sleep with it at 100% and woke up 10 hours later to find that I had lost 50%. Battery indicator told me that it was 48% cell standby and 48% phone idle and only 2% Android system. Is this usual? I didn't know just leaving my phone on the table would kill so much.
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Nov 27, 2010
Does anyone know how to stop this. I didn't use my phone at all today and 70% of the battery was used by the calender, I tried to uninstall it and I couldn't, I hit force stop but it started again. Anyone know how to fix, or disable calender?
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Jul 29, 2010
I got a DX on the 15th and about a week ago I turned my eris on to check something, well this morning to my astonishment the phone was still on.. Pretty good standby time if you ask me, my razor didn't even last that long...
Lasted over 8 days. I can't post the pic now because I'm on my phone, but I'll upload it later.
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Jul 11, 2010
Im trying to figure out the consumption issues with my battery and cell standby. it is currently responsible for 39% which is at the top of the list just above phone idle. what really concerns me though is my time without a signal is 49%!! but everytime i look at my phone it has 3bars! how can this be? and im assuming this is whats killing my battery? it should be noted that i dont think i have the "bug" others seemed to have.
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Apr 30, 2010
I was just wondering if anyone had the same issue as I do, with about 44% of my battery use coming from the notorious call standby.
I heard some speculation that this is akin to the issue with the Eris 2.1, so it would be solved by the Airplane Mode trick, but I have not found any results favoring that remedy.
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May 12, 2010
For some reason, which I can't figure out yet, when I go to Settings -> About -> Battery and look at usage, my cell standby is always highest which is fine but Bluetooth is always #2! I'm talking on average it's always 25% or close to that.This seems odd because it's just on, not connected to anything. If I turn off Bluetooth it immediately drops (obviously) so it just seems that for some reason the Bluetooth on this phone eats battery life like no tomorrow. What's stranger is WiFi (which I leave on 24/7) hardly goes above 10%.Very odd. Anybody notice the same? I guess I just have to get into habit of turning off BT when I'm not using it.
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