I've been running System Monitor and can confirm a 1% average CPU usage from the Wifi calling app. I suspect this would be hastening battery drain. This is even with the wifi calling set to off. I turned on wifi calling once to test it and turned it off after that.
Tested on the stock firmware without any modifications.
Related
Hello there guys ..just wanted to post a quick question / add some findings i've seen with respect to the effect of toggling edge/wifi / 3G
I've had my phone for just around 10 days now, and have been noticing how quickly my battery life drops..
Until now, I had kept 3G + Wifi switched on (wifi toggled automatically with Y5-battery saver app), and, no matter how hard I policed background applications, my battery life would automatically fall at the rate of about 1% every 5 minutes (even if I were not using the phone, and it was just lying idle)...
Today, I tried switching off Wifi altogether, and forcing my network data to 2G ...my (probably flawed ) logic being that push notifications can happen even over edge/GPRS, and when I need to use more internet heavy applications, I could switch wifi/ 3G back on for the duration I needed it ..
I have been seeing pretty decent results over the past few hours ... battery has dropped just about 4% in the last 2 hours...i've attached a (crude) image of my battery usage screen, and on it, you can see the usage curve changing to a lower rate from about the same time I turned wifi off completely..
Could anyone with more knowledge about wifi/edge/3g battery usage pls let me know if this is a genuine improvement, or if its just some placebo effect
I'll continue monitoring it over the day and keep you guys posted
I believe battery usage from most to least goes:
3G
EDGE
Wifi
Sent from my Nexus S using Tapatalk
Thx hfm ... i think that's generally the order in which battery is consumed as well - EXCEPT when wifi reception is spotty..
I think what was happening until now was that the 'Y5 Battery saver' app was recognizing my 'home' as a location with a known wifi connection..and was constantly switching on / searching for wifi connections whenever I'm at home..
but the problem is that in some parts of my home, wifi reception is a bit spotty...so all that 'scanning' would happen for no good, and no connection would be fixed..
the battery saver didnt really save much battery then
I just upgraded to stock GB 2.3.5. Everything seems fine (I did a Factory Reset to kill the Tethering Manager error and haven't seen it since).
I re-installed GPS Test app from the market, which I had before.
I've used it a few times. Every time, I end up exiting out and exiting the program thru Task Manager. So right now it is NOT running and doesn't show up in the list of running Apps.
Yet according to my Battery Usage screen, both Wifi and GPS Test are among the top users of battery, EACH at 24% of usage (don't pay too much attention to the high % as this is over the past 2 hrs where only 3% of total battery has been used, as the phone has been sitting on my desk resting). The thing that is weird is that they stay in Lock-Step with each other all the time (ie both always report the same usage percentage). I have Wifi set to "NEVER SLEEP" because I have read that this is actually better for battery life, although here in my office it is not hooked up to wifi. So I understand that Wifi might use battery if it's searching. But WHY does GPS Test use any battery if the program isn't even running? And it does this REGARDLESS of whether I actually shut off the GPS or turn it on in the settings.
Any ideas? I'm about to just uninstall GPS Test but wondering why this might be happening, as I'd like to have the app on my phone in general.
Hello,
I have a SGS with ICS CM9 (Build 16) by teamhacksung and when the phone goes into standby, the internet connection change from wlan to 3g automatically.
How can I prevent this?
Check if there is a setting to prevent this behavior, your cm9 is in its early stages for your devices and if it is not there yet, it most likely will be at a later point.
For now you could use an app like this
https://play.google.com/store/apps/details?id=eu.thedarken.wl
to keep your device from going fully into standby.
Yes i have found an option to disable standby, but this works only when the battery is charging.
When i use this app to prevent the standby mode, the battery drains faster, or?
Yes, preventing standby will cause the cpu not to deep sleep, which will cost more energy.
Okay, thank you. Then I'll wait for a bugfix.
Basically I am on Nexus S JellyBean 100% STOCK and this issues is happening with work WIFI.
How I noticed it...when I am at home I drop 1% battery on Wifi per hour. 10hours = 10% (sometimes less).
I go to work on the Wifi, I DONT USE ANYTHING ON THE PHONE and the battery is DRAINING LIKE CRAZY!!! 5%/h or more!!!
( I am in airplane mode in both place)
So I was thinking, WTF with this work wifi, i am not doing anything at all on it. Then I look at my wifi icon I have a constant RECEIVE icon. And I bet my phone does not go to sleep or something.
So why in the world my work wifi is draining my battery and the one at home is not. I will check tonight but I dont think I have traffic like this. I am registering 5-6kbytes/s for nothing. There was an explanation given in one of the links below about existing wifi traffic that goes through my phone but I do not agree with it fully. YEs sure there are several pings and beacon emitted back and forth but i do not think it is enough to cause 5-6kbytes/sec . The wifi is not in Monitor mode and it only receives the packets destined to my phone.
This is madness!!!! BTW When I had a different kernel back on ICS this behavior stopped. I will try to monitor again. So there is definitely some kernel switch that can force the wifi to idle.
Here are the links where they discuss this somewhat.
http://forum.xda-developers.com/showthread.php?t=1738171
http://forums.androidcentral.com/verizon-galaxy-s-iii/188929-your-wifi-constantly-downloading.html
kalinusa said:
Basically I am on Nexus S JellyBean 100% STOCK and this issues is happening with work WIFI.
How I noticed it...when I am at home I drop 1% battery on Wifi per hour. 10hours = 10% (sometimes less).
I go to work on the Wifi, I DONT USE ANYTHING ON THE PHONE and the battery is DRAINING LIKE CRAZY!!! 5%/h or more!!!
( I am in airplane mode in both place)
So I was thinking, WTF with this work wifi, i am not doing anything at all on it. Then I look at my wifi icon I have a constant RECEIVE icon. And I bet my phone does not go to sleep or something.
So why in the world my work wifi is draining my battery and the one at home is not. I will check tonight but I dont think I have traffic like this. I am registering 5-6kbytes/s for nothing. There was an explanation given in one of the links below about existing wifi traffic that goes through my phone but I do not agree with it fully. YEs sure there are several pings and beacon emitted back and forth but i do not think it is enough to cause 5-6kbytes/sec . The wifi is not in Monitor mode and it only receives the packets destined to my phone.
This is madness!!!! BTW When I had a different kernel back on ICS this behavior stopped. I will try to monitor again. So there is definitely some kernel switch that can force the wifi to idle.
Here are the links where they discuss this somewhat.
http://forum.xda-developers.com/showthread.php?t=1738171
http://forums.androidcentral.com/verizon-galaxy-s-iii/188929-your-wifi-constantly-downloading.html
Click to expand...
Click to collapse
for now what u can do, is to set your wifi to go to sleep when the screen is off
I've noticed that despite setting "Keep Wi-Fi on during sleep" to "only when plugged in" and disabling "scanning always available" Wi-Fi continues to deplete the battery at idle. According to the details in the battery stats, the Wi-Fi never turns off at idle (the Wi-Fi is shown as being on the entire time the phone is unplugged). I've found the only way to stop the Wi-Fi from depleting the battery is to disable it entirely. Has anyone else experienced this? Does this have anything to do with the kernel I'm using? Is it possibly a bug in Franco's kernel? Does this vary with the stock kernel or other custom kernels? It's not a major problem, but I'd just like to know why Wi-Fi is using up juice when it's supposedly turned off. Thanks.
BirchBarlow said:
I've noticed that despite setting "Keep Wi-Fi on during sleep" to "only when plugged in" and disabling "scanning always available" Wi-Fi continues to deplete the battery at idle. According to the details in the battery stats, the Wi-Fi never turns off at idle (the Wi-Fi is shown as being on the entire time the phone is unplugged). I've found the only way to stop the Wi-Fi from depleting the battery is to disable it entirely. Has anyone else experienced this? Does this have anything to do with the kernel I'm using? Is it possibly a bug in Franco's kernel? Does this vary with the stock kernel or other custom kernels? It's not a major problem, but I'd just like to know why Wi-Fi is using up juice when it's supposedly turned off. Thanks.
Click to expand...
Click to collapse
It's a 4.4 deal. Pretty certain it's intentional on Google's part.
The setting worked for me. Whenever the screen was off it would switch to my data connection instead. This turns out to use 3x as much battery while idle then WiFi did in my case.
You could disable background data which wouldn't use WiFi or data but also leave your phone unconnected.