I can't say exactly when I noticed this, but it was at least since the CM10 stable, and I've tried a couple nightlies since then. Wifi never seems to turn off according to the battery chart, which I believe because I get somewhat worse battery life now. Had anyone else seen this, or have any suggestions?
Turn off WiFi when not needed. Also, WiFi can save your battery vs a weak signal
LoopDoGG79 said:
Turn off WiFi when not needed. Also, WiFi can save your battery vs a weak signal
Click to expand...
Click to collapse
Well, I'm doing that manually now, but that's not a solution to the fact that it never goes into standby mode when not associated with an AP.
did you go into settings--wifi--menu--advanced and select keep wifi on during sleep only when plugged in?
merrygocow said:
did you go into settings--wifi--menu--advanced and select keep wifi on during sleep only when plugged in?
Click to expand...
Click to collapse
No. I prefer it to stay on wifi when there's good signal, so I have only use good wifi connections set, but not to put wifi to sleep. Regardless of that, wifi should be in standby mode when not actively associated with an AP, such as when in the car or anywhere you haven't told it to remember the APs around you.
Related
Edit: Use at your own risk, it worked for me but people seem to be saying it's not true.
I figured I would share this tip because it worked so well for me. When I first got the Nexus and connected it to my WiFi, the battery was draining at an absurd rate, even at idle. I want to use WiFi because we don't have LTE out here, so turning it on and off was a pain. Then I remembered the Sleep Policy, and there it was set to keep the WiFi on, even during sleep. I'm assuming Verizon did this to help reduce congestion on their network and save them money. After changing this to "only when plugged in" my battery graph at idle flatlined.
Hopefully it will help someone else!
Steps:
1. Settings
2. Wifi
3. Menu -> Advanced
4. Keep WiFi on during sleep
5. Pick an option best for you. I chose Only when plugged in.
From what I have read, keep wifi on during sleep was always the most power efficient. Maybe you have a weak wifi signal?
I'd like to hear what other people have to say on this one.
That's definitely interesting to hear. I'm usually one floor away from my wireless-N router which yields 3 or 4 out of 4 bars consistently. I guess I'll have to see if this works for anyone else then.
This is wrong.
You should set it to Always.
http://www.androidcentral.com/android-101-save-battery-keeping-wifi-alive
Because initiating wifi connection every time you turn on your phone will consume more power.
compywiz said:
I figured I would share this tip because it worked so well for me. When I first got the Nexus and connected it to my WiFi, the battery was draining at an absurd rate, even at idle. I want to use WiFi because we don't have LTE out here, so turning it on and off was a pain. Then I remembered the Sleep Policy, and there it was set to keep the WiFi on, even during sleep. I'm assuming Verizon did this to help reduce congestion on their network and save them money. After changing this to "only when plugged in" my battery graph at idle flatlined.
Hopefully it will help someone else!
Steps:
1. Settings
2. Wifi
3. Menu -> Advanced
4. Keep WiFi on during sleep
5. Pick an option best for you. I chose Only when plugged in.
Click to expand...
Click to collapse
Well it significantly reduced my idle battery use (like at night), so I'll put a warning at the top but I'll keep mine the same.
I guess you haven't turned on the mobile data cause if you do, then this consumes more power than wifi for sure.
Sent from my Galaxy Nexus
Generally, radio management on the Nexus sucks. I want a setting where if it's in standby, ALL RADIOS ARE OFF except for base phone and text messaging. So this helps a little.
Sure, it uses more power initially to turn whatever on, but no where near as much if you don't use your phone for hours, and don't constantly need to be in sync with everything (like when you're at a computer all day, and you can check your gmail, yahoo mail, have gchat and skype and whatever).
I'd even like a setting policy which only turns on data or wifi when you have an app open that uses them.
I may be using my "phone" (my wife said about her Stratosphere, "I forgot I could use this thing as a phone") differently than most people with smartphones. I need it to be my computer and social device when I'm away from a computer, and only when I take it out of my pocket and turn it on.
Wifi set to always on, while at home. Slept for 9 hours, went down from 100% to 94%
andy2na said:
Wifi set to always on, while at home. Slept for 9 hours, went down from 100% to 94%
Click to expand...
Click to collapse
Same here, with WLAN on my Nexus Prime drops about 6% over night.
Interestingly I just lost about 10% in 2 hours with the phone in stand-by but then I remembered I had to change my IP ~7 times in this time frame which likely caused a lot of WLAN activity and used up quite some energy.
I am looking to buy the Nitro HD for WiFi only use and maybe occasional prepaid use. I will flash to some deodexed ROM or maybe CM9 so I am not so concerned about software issues in the stock ROM.
What I am more concerned about is - how are the cameras for Skype/Google Video etc?
Any way to turn off all radios except WiFi by default everytime the phone starts up?
Thanks.
^^bump^^
I'll chime in here, I use mine as a wifi only device. As far as Skype/google video goes, video calls are great. I don't have a Sim card in mine and the mobile settings are greyed out which I'm assuming the cellular is off.
I'm currently running the latest cm9 nightlies and the device keeps getting better and better.
Battery life is definitely better than gingerbread. Battery life is within reason for a device this powerful while on wifi. The only battery drain I've found is being out of range of a wifi area. It seems the device goes on over drive looking for wifi and within an hour, majority of your battery is dead. This might be a CM9 issue, I'm not sure on that. Just remember to turn off your wifi when out and about.
Thanks for the response. I got myself a used one for $200 today off Craigslist. Will put leaked ICS ROM on it
Looks much sweeter than my iPhone 4S!!
UP！UP!
The super screen is eye candy. Using wifi it will last for 5-7 hours, while using 3g only for 2-3 hours.
For these two reasons, i often use it only as WIFI.
Will somebody introduce a super airplane mode without shutdown of WIFI？
Sent from my LG-SU640
Get dx battery saver, put it into sleep mode, then activate wifi.
Sent from my LG-P930
You don't need any special app. Just enable airplane mode, then enable wifi.
drumist said:
You don't need any special app. Just enable airplane mode, then enable wifi.
Click to expand...
Click to collapse
oh,no, it is a two-click thing with a wifi interruption.
We want a one-click button.
Sent from my LG-SU640
sandhuxda said:
Any way to turn off all radios except WiFi by default everytime the phone starts up?
Click to expand...
Click to collapse
I got it！
If there is /system/etc/settings.xml, modify it about what is airplane mode （this is, remove “wifi” in the lines of "airplane-mode" ）.
shelz said:
oh,no, it is a two-click thing with a wifi interruption.
We want a one-click button.
Sent from my LG-SU640
Click to expand...
Click to collapse
Don't forget reboots
Anyways, sold off my Nitro and moved on. Thanks for all the responses.
I am suprised, there still is no battery life thread.
People must be very happy with their battery lifes or nobody is buying this tablet
I do have one big issue with battery life.
WIFI is the biggest battery hog, using 2-3 times more battery than the screen.
For 3 hours WIFI roughly 1400mAh.
So I only manage like 5 hours of SOT.
Btw. I have set WIFI to be disabled, when the screen is off.
Any suggestions?
I haven't had mine off charge long enough to really be able to comment about this yet but I can't complain with it so far.
Mine seems good so far. Had one freeze as you can see. 33% left.
bill3508 said:
Mine seems good so far. Had one freeze as you can see. 33% left.
Click to expand...
Click to collapse
Still, I think it is strange (as seen in your screen shots), that WIFI accounts for almost half of your battery usage. And 5+ hours SOT is only 6%?
Could you be so kind and post the screen for wifi too, so we can see the "computed power use"?
When looking at my phone, wifi is at 52 mAh power use over an 18 hour period, on this tablet it is 2700 mAh for 10 hours.
An alarming discrepancy.
Or am I missing something?
supersquishy said:
Still, I think it is strange (as seen in your screen shots), that WIFI accounts for almost half of your battery usage. And 5+ hours SOT is only 6%?
Could you be so kind and post the screen for wifi too, so we can see the "computed power use"?
When looking at my phone, wifi is at 52 mAh power use over an 18 hour period, on this tablet it is 2700 mAh for 10 hours.
An alarming discrepancy.
Or am I missing something?
Click to expand...
Click to collapse
Here you go. I'm guessing screen is only 6% because the tablet has been up now for 4 days, so 6 hours is a small portion of the activity.
supersquishy said:
I am suprised, there still is no battery life thread.
People must be very happy with their battery lifes or nobody is buying this tablet
I do have one big issue with battery life.
WIFI is the biggest battery hog, using 2-3 times more battery than the screen.
For 3 hours WIFI roughly 1400mAh.
So I only manage like 5 hours of SOT.
Btw. I have set WIFI to be disabled, when the screen is off.
Any suggestions?
Click to expand...
Click to collapse
Doesnt Wifi use more battery when its connecting and reconnecting with it disabled when the screen is off?
ZiggSVO said:
Doesnt Wifi use more battery when its connecting and reconnecting with it disabled when the screen is off?
Click to expand...
Click to collapse
I really don't know. You may be right.
I guess the high wifi in battery stats is a reporting error / miscalculation. I have wiped the cache partition in recovery (to fix my ambient light sensor) and ever since wifi is at the bottom of my battery list.
And I did not get any better SOT, so there could not have been any real battery drain from wifi even when it held the top spot in the stats.
Still disappointed with only 4-5h SOT.
Thanks everybody for helping out.
ZiggSVO said:
Doesnt Wifi use more battery when its connecting and reconnecting with it disabled when the screen is off?
Click to expand...
Click to collapse
No its still going to use far less unless your picking it up every 30 seconds or so.
bill3508 said:
No its still going to use far less unless your picking it up every 30 seconds or so.
Click to expand...
Click to collapse
my understanding of how android has utilized the wifi sleep policy is that its best to leave wifi always on when sleep. It will use more battery to reconnect to the wifi network when it is woken up and disconnect when sleeping.
Any sources to support your theory? I'd like to read up on it more.
Info I've always followed. This is from 2011 as well:
"This tip is one that seems counter-intuitive, but you can save a lot of wear and tear on your Android phone's battery if you tell it to keep the Wifi radio turned on and connected while the phone is sleeping. Your phone needs a lot of juice to keep pinging those cell towers, and even more to transmit data to and from them. Wifi radios use much less power because of their design, and they don't have to keep searching for a better access point. It's the way cellular data communication was designed, and it's a necessary evil.
But what if you're spending all day (or all evening) in one place, connected to Wifi? If you tell your phone to shut off Wifi when idle, it bounces back to cellular data (be it 2G, 3G, or 4G) and starts sucking down the electrons again when the screen shuts off. That's no good, and easy to fix:
Open the advanced Wifi settings by pressing the menu button, then Settings, Wireless & networks, Wi-Fi settings, and tapping the menu button again. You'll have a choice to either Scan, or go Advanced -- go Advanced.
Tap the Wi-Fi sleep policy entry, and you'll get a pop up dialog with the choices you see in the picture above. Choose Never.
Now even when your phone goes into standby mode, you'll stay connected to Wifi and be able to get mail and messages without turning the cell radio back on and trouncing your battery life. And for the times when you're not in an area with a Wifi connection, just shut Wifi off, either through the menu or with a handy toggle widget. Your battery will thank you for it."
ZiggSVO said:
my understanding of how android has utilized the wifi sleep policy is that its best to leave wifi always on when sleep. It will use more battery to reconnect to the wifi network when it is woken up and disconnect when sleeping.
Any sources to support your theory? I'd like to read up on it more.
Info I've always followed. This is from 2011 as well:
"This tip is one that seems counter-intuitive, but you can save a lot of wear and tear on your Android phone's battery if you tell it to keep the Wifi radio turned on and connected while the phone is sleeping. Your phone needs a lot of juice to keep pinging those cell towers, and even more to transmit data to and from them. Wifi radios use much less power because of their design, and they don't have to keep searching for a better access point. It's the way cellular data communication was designed, and it's a necessary evil.
But what if you're spending all day (or all evening) in one place, connected to Wifi? If you tell your phone to shut off Wifi when idle, it bounces back to cellular data (be it 2G, 3G, or 4G) and starts sucking down the electrons again when the screen shuts off. That's no good, and easy to fix:
Open the advanced Wifi settings by pressing the menu button, then Settings, Wireless & networks, Wi-Fi settings, and tapping the menu button again. You'll have a choice to either Scan, or go Advanced -- go Advanced.
Tap the Wi-Fi sleep policy entry, and you'll get a pop up dialog with the choices you see in the picture above. Choose Never.
Now even when your phone goes into standby mode, you'll stay connected to Wifi and be able to get mail and messages without turning the cell radio back on and trouncing your battery life. And for the times when you're not in an area with a Wifi connection, just shut Wifi off, either through the menu or with a handy toggle widget. Your battery will thank you for it."
Click to expand...
Click to collapse
I know that leaving WiFi on runs your battery down on any device when its connected and it takes all of 2-3 seconds to connect. No reason to leave it on full time when your not using it. Also, the device is continuously checking and sending small amounts of data to maintain that connection.
Were talking about the pixel here and not a cellular device.
Pretty happy with the C.
I haven't really payed attention to how long this device lasts, I use it pretty casually so it lasts me up to a week. I have used it to stream movies and it has lasted me the whole day (8 hours) watching movies with about 30% left. Compared to other tablets I've had including the nexus 9 this one blows them all away. My old nexus 9 would die after a few episodes (about an hour)
Sent from my iPhone using Tapatalk
I streamed a good 6 hours of a live feed on battery and the device used around 50%, can not complain with the battery life at all with this device
bill3508 said:
Pretty happy with the C.
Click to expand...
Click to collapse
Was that with bluetooth (and keyboard) on?
Ves said:
Was that with bluetooth (and keyboard) on?
Click to expand...
Click to collapse
No, just WiFi, don't have a keyboard.
As a heads up, there appears to be a WiFi issue with MM itself. I'm seeing the same issue on my Nexus 7 2013 running a MM ROM, and I found a thread online talking about it...maybe from the Android Central forums or something, I can't remember now. People seem to be unsure as to whether or not WiFi is actually causing a battery drain, or if it's just reporting incorrectly. But at least on my N7, the battery can drop 40-50% in one day while on standby, and when I have WiFi set to Off when it's sleeping. And I used to get DAYS of standby time before going to MM.
Edit: Here's an XDA thread about it: http://forum.xda-developers.com/google-nexus-5/general/guys-call-wifi-battery-drain-6-0-t3219870
I had the same issue with WiFi battery bug on the nexus 5. Fixed it via router by turning off the auto disconnect (the option where router decides if a device can connect based on signal strength) on both 2ghz and 5ghz. After this the Wifi went back down to the bottom of the battery list. Long shot, and most likely not even related, but hope it helps anyone.
On a Asus rt router.
So I have an HTC 10 and I generally like this device but I have a few problems though. Wondering if anyone can help me out.
1. I have extremely high battery drain while using WiFi. Like 1% every minute or two. If I go to sleep leaving the WiFi turned on I may lose 10 to 15% battery life which feels like quite a lot.
2. The battery history graph always displays WiFi as turned on no matter if I turned it on or off. It's basically a solid green line. Does anyone else have this problem or know of any solutions?
Thanks for helping!
jhadsfi said:
So I have an HTC 10 and I generally like this device but I have a few problems though. Wondering if anyone can help me out.
1. I have extremely high battery drain while using WiFi. Like 1% every minute or two. If I go to sleep leaving the WiFi turned on I may lose 10 to 15% battery life which feels like quite a lot.
2. The battery history graph always displays WiFi as turned on no matter if I turned it on or off. It's basically a solid green line. Does anyone else have this problem or know of any solutions?
Thanks for helping!
Click to expand...
Click to collapse
There's a few threads about Wi-Fi issues. I have bad drain as well along with many others.
Here is a main one:
http://forum.xda-developers.com/htc-10/how-to/wifi-constant-suspend-resume-leading-to-t3392562
Check if Wi-Fi scanning is turned on in Wi-Fi setting and turn that off. It keeps Wi-Fi active even when Wi-Fi is off.
andybones said:
There's a few threads about Wi-Fi issues. I have bad drain as well along with many others.
Here is a main one:
http://forum.xda-developers.com/htc-10/how-to/wifi-constant-suspend-resume-leading-to-t3392562
Check if Wi-Fi scanning is turned on in Wi-Fi setting and turn that off. It keeps Wi-Fi active even when Wi-Fi is off.
Click to expand...
Click to collapse
Thanks a lot for helping. I cannot find the WiFi scanning setting though. I checked in Settings > WiFi > Advanced WiFi. Nothing there.
jhadsfi said:
Thanks a lot for helping. I cannot find the WiFi scanning setting though. I checked in Settings > WiFi > Advanced WiFi. Nothing there.
Click to expand...
Click to collapse
Settings->Locations->Three dots(menu)->Scanning
At home using wifi. When at work or on the road, LG G4 uses LTE but wifi setting remains on. Question, does this reduce battery life? In other words, does the phone keep looking for wifi networks and drain the battery in the process? If so, should I find an app that turns wifi off automatically whenever leaving home?
htcnext said:
At home using wifi. When at work or on the road, LG G4 uses LTE but wifi setting remains on. Question, does this reduce battery life? In other words, does the phone keep looking for wifi networks and drain the battery in the process? If so, should I find an app that turns wifi off automatically whenever leaving home?
Click to expand...
Click to collapse
I would asume yes it uses power always trying to find a open hotspot even if data is on. If u leave wifi on its on all the time. Prob in a lower power state just searching for open spot or known wifi . instead of downloading or streaming which bring it to full power.
I am going to try an app called wi-fi matic for the next few weeks. It allows turning off wifi radio when away from home. Let's see if it makes any difference with battery life.