Samsung Captivate :: What Would Be Draining Battery When I Sleep?
Aug 9, 2010
I went to bed at 1am and woke up at 10:20am. My battery was at 65% before bed and 44% when I woke up.
I killed all tasks with advanced task killer as I do throughout the day as well. I don't use the email program on my phone nor do I get any notifications for any other programs. My Wi-Fi sleep policy is set to never because I have Wi-Fi at home. Brightness is at a low setting too. So, any ideas what would be draining my battery during the overnight when I'm not using my phone? I don't have problems during the day when I use it.
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Dec 1, 2010
After noticing my battery was draining quickly, and then after reading this thread, I installed Android System Info to see what was draining my battery so fast. I notice that whenever I would turn on WiFi, the phone will never go to sleep , regardless of what I set the WiFi sleep policy to. After turning off WiFi, the battery still drains heavily.
The WiFi will shut off after 15mins (if you set it to "When screen turns off" or "never when plugged in"). However it seems to keep the CPU on causing it to drain down the battery.
It would seem that whenever WiFi is enabled, the Android system process creates a partial wakelock that does not go away even if you turn off WiFi. The only way to resolve this is by powering off or rebooting the phone.
You can verify this in Android System Info by going into Battery-History-Other Usage-Partial Wake usage to see how much time the "Android System" process holding a partial wake.
I even did a factory reset on the device; and it is still happening so it doesn't appear to be any app that caused the issue. As I said, it works fine as long as I don't enable WiFi.
I already know of two users having this issue, but I'm wondering if folks having battery problems are going through this as well. Is anyone else having similar issues after using WiFi? I'm hoping someone will be able to identify what exactly is putting the wakelock on and we'll be able to find a fix for it. Other than not using WiFi at all or rebooting the phone after using Wifi.
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Nov 12, 2010
I've been getting pretty good battery life (about 14-16 hours on average) when I use the airplane mode trick and kill the Media Hub service. However, my phone has not been able to sleep since the past 2 days and the battery is draining quickly.
The up time indicates that the phone cannot go to sleep. I'm just surprised because I haven't changed any of my phone settings so I don't know why this is happening. I uninstalled the last app that I downloaded and that didn't help.
Should I try doing a hard reset? Are there any apps that will specifically tell me what is keeping the phone awake?
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Nov 18, 2010
Since I got my Captivate just a couple of weeks after it hit the market, I experienced really good battery life. I could plug the charger in at 6:00 when I get up, take it off the charger at 7:30 when I leave for work, and make it til the next morning most days.A couple of weeks ago, I left for work with a full charge, and around 11:00 I took out my phone to test WiFi coverage for some new access points we had installed in the office. The phone felt very warm, and the battery indicator was yellow. For the next couple of days it went like this. I had a spare Samsung battery from when AT&T sent us a new one for my wife's Captivate when she was having random shutdown issues, so I swapped batteries. Things were fine for 10-11 days. Then suddenly last evening about 7:30, when I went to look something up online with my phone, it was very warm again, and the battery indicator was red. Had to put it on the car charger when I left church.When I got home, I put it on the charger all night. By midday today, it was in the yellow, and it finally died about an hour ago. again the handset felt very warm. I don't have a spare USB cable here at work, so will have to wait to get home to charge it. Anything particular I should look for on the phone (running apps, etc.)? Or do I just need to go ahead and place a call to AT&T support?
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Aug 7, 2010
I got my Captivate about a week ago and some far I am liking it a lot. However, I thought I was having some battery issues, as my phone is draining faster than my brother's iPhone.
Using one of the battery status widgets, I've noticed that my batter drops about 1 percent for every text that send and receive (send one text+receive one text = 1% drain) meaning that I'd only be able to send about 100 texts in a day on a full charge. Most days I don't reach that but there are some days which are pretty text heavy. Is this a normal rate at which the battery should be draining for doing something like that? I am using Juicedefender and Advanced Task Killer to monitor what is going on, and the only widget I have running is Fancy Widget.
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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 24, 2009
Battery life issues for me are over. In the beggining I would be happy if the battery lasted for 2 days. Now I can have my phone always on for 7 days straight, that is 168 hrs (when using very limited wireless data connectivity of course), thanks to Galaxhero and some other tweaks.But anyway, lately I've been doing some tests regarding Google Latitude. I suspected that Latitude was messing (not just) a little bit with the battery life.So, yesterday at 9AM I unplugged the fully charged phone that had the Latitude feature on. Result: at 5PM the battery was at 90%.Today, I decided to turn off Latitude (leaving the rest of the configurations intact) and unplugged the fully charged phone again at 9AM. Result: it's 5PM and the battery status is at 100%.
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Aug 3, 2010
The last day or so after charging my phone to 100% overnight (phone is on when charging) and then putting in standby mode I'm losing like 5-7% of battery every hour.Over the weekend I was losing just 6% every 9 hours in standby mode. Today in 4 hours time I'm down to 65% already with mostly standby mode and a few minutes of browsing. I even had JuiceDefender installed since last night and it's not helping at all.To me it seems that something is in the background that is draining the battery though I when I check running services I don't see anything that shouldn't be there. When I was losing only 6% every 10 hours I did have a live wallpaper, weather/clock widget, and task killer. I didn't change anything on the next charge and now I'm constantly losing battery even in standby mode.
I have Wifi/GPS/background data off, brightness at minimum, no animations, etc. So pretty much followed all the battery saving pointers. I thought it was working good when I got just about 36 hours over the weekend with standby and moderate usage. So I don't know what has happened to my battery all of a sudden.The two times that I have managed to do 30+ hours on a single charge I had Advanced Task Killer running.However, even after doing 36 hours on one charge the next day even with ATK the battery started to drain a lot every hour in just standby. Anyone else having similar issues? I don't know what else to do at this time. I've uninstalled many of the apps thinking it might one of them causing the issue, but still having issues.
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Jul 16, 2010
Battery is draining fast on SGS. comes down from full charge at 4 am to 70% by 8 am without any usage. During the day will have to charge it twice. Any possible causes or tips to manage it? am on EDGE with air-tel but use wi-fi mostly.
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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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Sep 5, 2010
I'd like to thank the people over at XDA.I think they may have found the culprit for the horrible battery performance some of us are seeing. There are two threads of interest over there:Time without signal > 50% - xda-developers Wow battery from 100 to 10 in 3 hours xda-developers.The short of it is that the 3G signals don't stay locked and the phone keeps hunting.If you go under the battery life settings and click on "Cell Standby" there's a field for "Time Without Service".Mine and many others were hover around 50%.This is constantly draining battery even while you do nothing.So the temporary quick fix is to turn on Airplane mode, then turn it right back off.This fixes some incorrect setting.On my phone, Time Without Service dropped from 52% last night to 0% today.And my battery only dropped about 9-10% idling over night.This is MUCH better than the 30% draining overnight I was seeing over the past few days.
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Dec 2, 2010
I noticed this today, I use my phone to USB tether, and after coming home from running errands today my phone was at about 80% battery life, so I put it on the USB cord that it came with and connected it to my computer so I could check email and facebook, etc. Well after a few hours I took my phone off the charger and the battery had dropped to 40%. How is this possible, I know tethering uses power from the phone, but if its connected to the computer and charging as well, why is it still draining my battery? my droid never had this problem and i tethered all the time, is it possible that I have a bad battery?
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Nov 17, 2010
I just rooted a few days ago. Put a custom ROM on it (KaosFroyo v38). Ever since I rooted my battery dyes in about 3 to 4 hours. My phone says its awake 99.9% and the android OS is using 40-50% battery. Is it possibly the ROM? If so how can I change to a new one? I have a Droid Eris.
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Aug 30, 2010
Looking for an app or widget that will automatically disable 3G and change my phone to 3G (Edge) when the screen is asleep or I press the lock button.and the re enables when I unlock.
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Sep 14, 2010
I've heard everyone mention that setting wifi to never sleep has helped battery life but I can't figure out where to find the controls for that policy.
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Sep 9, 2010
I've noticed when the phone goes into standby mode (press the right power button), the 3G eventually turns off. Is there a way to prevent that from happening? I'm assuming I can't get any notifications (i.e. Instant Messenger clients, Google Voice, etc.) while the 3G is off, but not sure. I'm also assuming 3G goes into sleep mode, as when I power the phone up I don't see the 3G icon (is that assumption correct?).
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Sep 14, 2010
When I select the power button to bring the phone out of sleep the phone screen will turn off within a second or two. Is there a way to keep the screen on longer? If I press power and look away for a second the screen goes black again. Its liek I have to hit power and jump right on it to enter my swipe code.
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Sep 6, 2010
Anyone else having a problem of not having the screen turn on when you press the power button from sleep? It doesn't happen often but it does happen. This is my second Captivate as my last one would shut itself off randomly and that phone also had this problem.Yes, I make sure I pressed the power button and waited a couple seconds to make sure it just wasn't lag but I can guarantee you it is not. Like I said, it doesn't happen all the time but maybe once every 2 days. I'm guessing it's a slight problem with other users as it happened on my last phone but I'm not sure. Hopefully it's a software issue.
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Jul 22, 2010
I am new to smartphones and thought that this might be good for others who are new and don't have the unlimited data plan grandfathered in to know.
This was posted in reply to another question I had had about Pandora so the credit goes to poster MeVirtually.
By default the wi-fi setting is set to go to sleep (and use cellular data instead) when the screen is off, which will most likely happen while you are streaming music as well as other things. To change it so the wi-fi never turns off, to into the phone's menu -> wireless and network -> wi-fi settings -> tap the menu button and select advanced which has an option for wi-fi sleep policy that had been defaulted to sleep "when screen turns off". There you have the option to change it to "never" or "never when plugged in".
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Apr 19, 2010
For some reason my battery is draing QUICK in a couple hours goes dead, thinking must be some bad app? I deleted a few of the last apps I installed but it could be an update, wish it was easier to solve, but now Media is my number one battery usage, even after I uninstalled a couple new apps.
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Jul 5, 2010
Is there an LED light on the Captivate to notify of email, missed calls, texts when the screen is locked or in sleep?
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Sep 24, 2010
So I painfully watched my Cappy's battery door crushed under my friend's car as one of their "harmless" joke. Now there's not a single site on the internet selling these doors, and I'm desperate. I found dummy/display Captivates though, so I was just wondering if anyone knows if the dummy battery door can replace the REAL door by any chance?
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Aug 10, 2010
I have downloaded a number of widgets and apps.is this the reason? Im using Tajm, BattStatt, 3g Watchdog, DroidStats, Internal and external memory notifications, retro clock.Ive got all of these as widgets spread out over the 7 screens.Also guys if your phone was not used all day and locked how much battery would you say would get used?
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Dec 16, 2009
After the ota update I went from getting full day battery life with pretty heavy usage to 10 hours. The update was supposed to improve battery life but it made it worse. I tried going a day without using home++ (home replacement app ) and my battery life went from 10 to roughly 36 hours!!! So if you are one of those people complaining about battery life after update like I was,and you are using this app try taking it off. hope this helps some ppl.
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Jun 28, 2010
My wife's phone has used almost 4GB of data this month and her battery has been draining much faster than mine, especially at night. Last night we watched in SystemPanel at the Net Receive indicator and it was constantly downloading at least 200+ kps. I had read about some issues with Facebook so we removed the Friendstream widget and saw the downloading go close to zero.
This morning, I checked the 8 hour monitoring in SystemPanel and saw that the CPU activity was still high overnight (running near 30%) and her battery drain was twice mine (over 13% used over ~7 hours, mine was around 5% drain).
I loaded up Spare Parts on her phone and was looked under Battery History, Network Usage and took this picture (sorry about the quality, her screen protector makes it hard to get a good picture and she is not rooted). Can anyone explain what UID 10006 is and why it is downloading so much data? I do not see it listed on my phone in Spare Parts. What do we need to do to turn this off or at least slow it down?
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Aug 18, 2010
I am annoyed with the fact that the phone sleeps when on a call. I primarily use it with bluetooth while driving and to end a call i need to unsleep the phone and then I can do so.
Is there an app or setting that will disable the sleep "feature". To me this is one of the most annoying things about this phone.
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Jul 2, 2010
I am using BB V0.4 with Chevys 1.2 ghz ul kernel.My battery meter has been on 100% all morning normally it drains much faster than this. I know there is a CHANCE my battery just isn't being drained because of the 1.2 ghz ul, but it seems pretty slim to me. I have been using it for probably 4 hours without it going down form 100%.
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Sep 7, 2010
What is up with this program? Everytime I open task killer it shows Amazon MP3 as running.I have NEVER used Amazon MP3. Amazon MP3 came with the phone, yet my carrier won't support it ( cough Sprint ), they say call the application provider.I can't get a phone number to Android to give them a piece of my mind.I call Amazon and get sales people that don't want to listen and dump me on anyone they can find and are the wrong people. Why can't I get support? Why can't I uninstall Amazon MP3?I don't want Amazon MP3, not if it is going to run all the time and drain my battery.
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Nov 9, 2010
A while ago I got rid of Handcent because it was very laggy following updates.Having heard this had been fixed, I have downloaded it again and it's no longer laggy which is great.However, it is draining the battery. I know this because I've had the System Panel monitor on, and the history shows that the CPU usage for Handcent is high for about 15-20 minutes after I send a message (as opposed to the stock, which just goes down as soon as I've sent a message).Is there a setting somewhere on Handcent that I'm missing, that's keeping the CPU usage high?
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May 25, 2010
Just wanted to get a feel for what the consensus view in this area is, as i'm slightly torn.On one hand i've read online (here I think, and elsewhere) that fully draining the battery regularly is bad for it and will damage its cells. (I'm not sure what regularly means, daily/weekly/monthly?) Hence i'm a little cautious to do it.However I tend to get far better batter usage after draining, turning the phone off and doing a full overnight recharge. Little top-ups, like taking it from 60% (where it reached through a day of medium usage) to 100% seems to result in inferior performance.A lot of people on here talk about overnight charging, which i've no problem doing. (In fact i'm used to it as my old Samsung Omnia required it) But 'how' do people do it? As in, do you regularly use 70-80% in a day and then leave it overnight? My current behaviour is to use it throughout the day in during (odd bit of browsing, txting, app usage etc) which can take 50-60%, then get home top-up for an hour or so, which gives me about 40% back, so I know i've got plenty in the evening when out.
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