Recently, I switched from Oat's Light n' Tasty to CM9 nightlies (currently on 20121202) which I flashed with CWM. I have noticed that the battery drains significantly faster with CM9 when the device is asleep. Looking at better battery stats I found that ath6kl_wow seems to be the culprit, which was reinforced with GSam which reported that 89% of the battery was consumed by wifi. Any ideas of what may be the problem or how to resolve the battery drain?
Thanks.
Have you gone into the advanced WiFi settings and set it to sleep when the screen is off?
Additionally you could try increasing the WiFi scan interval in the build.prop
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-SGA- said:
Have you gone into the advanced WiFi settings and set it to sleep when the screen is off?
Additionally you could try increasing the WiFi scan interval in the build.prop
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I want to be able to get notifications from the device, so ideally i wouldn't want the wifi off when the screen is off. I haven't edited the wifi scan interval yet, any recommendations on a time i should enter into build.prop?
You could try 180, but if you are always connected it won't make a difference.
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Related
Just wondering regarding data connections.
What setting is likely to give the best overall battery life. WiFi set to never sleep or WiFi set to sleep when screen is off
I'm not sure what would use more power. WiFi or 3G
waynefox said:
Just wondering regarding data connections.
What setting is likely to give the best overall battery life. WiFi set to never sleep or WiFi set to sleep when screen is off
I'm not sure what would use more power. WiFi or 3G
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Calibrating battery(free in market) is the best for you battery, full charge til mv=4182(or higher if you get it), then use the phone til it`s completely empty and shots it self off. Then your up to go. You can use Hp power packs as well with hp kernel.
SuperSkill
I've gone back to using HP SR2 and battery life is great. But wifi and Bluetooth doesn't work properly with this kernel
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I am using hp sr2 and its working good wifi and blth. I am on stock v20l. And for me network data drains battrery faster than wifi
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Hi to everyone. I forgat to turn my wifi off during my working hours. In the nd of my shift, i check my battery and it was proximately %5 left and even i didnt use the phone during my shift. it was %50 or something before starting. Does wifi still work even on the sleeping mode?
Thanks guys
no it stays on unless you set up the power saving mode i use custom settings so that wifi etc will turn off at 40% battery
wi-fi is a big battery drainer. Always have it off if you don't need it. Same with gps, data, and auto-sync for various accounts
Try using juice defender. I think the free version always you to enable wifi control (after your phone goes into sleep mode it should turn off the wifi until you wake it up)
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juice defender is in itself a battery drainer. don't use those "battery saver" apps. they're all bs. just get in a habit of turning off connections manually when you don't need them.
Are you aware of the setting: wifi settings/advanced/wifi sleep policy and set it to sleep when screen turns off?
Higgsy said:
Are you aware of the setting: wifi settings/advanced/wifi sleep policy and set it to sleep when screen turns off?
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Thanks I didn't know about that setting, but my question is once wifi turns off mobile data kicks in. Which drains battery more? Wifi or mobile data?
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They both drain battery equally as much. Mobile data shouldn't kick in unless you have it toggled on.
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Use Green Power to automatically disable wifi and data when the phone goes into stand by. There are lots of settings like enabling wifi at certain intervals to sync email/whatsapp/other push services.
On GB for me it's the difference between losing 25% battery overnight without it and losing only 3% when it's enabled and that's with sync every hour.
It seems that on any ICS rom wifi doesn't use any juice even when enabled in standby. Because of the kernel bug in the leaks I'm now on the official CM9 rom and after almost 9 hours with wifi turned on I only lost 4%, on every other ICS rom I tried I get the same results.
wifi
zen0s said:
Thanks I didn't know about that setting, but my question is once wifi turns off mobile data kicks in. Which drains battery more? Wifi or mobile data?
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install battery saver or juice defender , i recommend the second one
firasusman said:
install battery saver or juice defender , i recommend the second one
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I tried juice defender ultimate but connection was on and off and time to time it took ridiculous amount of time to get the connection back :/ also I don't know why with juice defender I noticed sluggish performance phone, after uninstalling everything was much more snappy.
I have wifi on all the time and I only lose about 2-3% over night on stock, I guess it's fine the way it is for me without using all those battery "saver" apps.
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dr. xp55 said:
juice defender is in itself a battery drainer. don't use those "battery saver" apps. they're all bs. just get in a habit of turning off connections manually when you don't need them.
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I disagree. I definitely get power savings with JD compared to without it. Auto-disabling WiFi saved loads of power for a start, and my overnight drain has gone from 3-5%, to approx 1% with JD running. I'm not saying all batt saver apps are worth using, but JD works for me.
Its a lot easier to have a well-behaved app that DOESN'T use a lot of power itself manage your connection toggling rather than having to remember to do it yourself.
dr. xp55 said:
They both drain battery equally as much. Mobile data shouldn't kick in unless you have it toggled on.
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Wrong. WiFi uses more power. Its a separate transmitter being driven by the battery, whereas as mobile data will use the existing transmitter (phone) that's already on, but obviously drive it a little harder than if it was all off.
I have always found the battery life to be poor but I have come to accept this device has a large screen and great processing power etc!
My UK phone is rooted on the latest ICS and has various apps frozen with titanium backup manager! It use to be in deep sleep mode for about 68% of the time but since 2 days ago cpu spy says it hasn't been in deep sleep mode! I have installed various apps that kill running apps but the phone fails to sleep!
Any ideas why it isn't sleeping, just sits at 200mhz!
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AudioOut_1 and alarm manager appear as wakelocks in Better Battery Stats app!
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newgen2005 said:
AudioOut_1 and alarm manager appear as wakelocks in Better Battery Stats app!
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Go to Settings -> Sounds -> Go to the bottom -> disable touch sounds. (Better if you untick all 4 options). Reboot. Leave phone for 10 mins. Check CPU Spy. :good::highfive:
Thanks for the reply, I did that when I first got the phone! Just checked and all the boxes are un-ticked!? Any other ideas?
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newgen2005 said:
Thanks for the reply, I did that when I first got the phone! Just checked and all the boxes are un-ticked!? Any other ideas?
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Turn off custom power saving mode.. Check after that.. I faced issues with these two.. Sometimes even l2_hsic goes crazy and drains the battery.. Check that too.
Thanks, again this setting is disabled on my phone! Still sitting at 200mhz! Though the battery doesn't seem to be draining as much!?
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newgen2005 said:
I have always found the battery life to be poor but I have come to accept this device has a large screen and great processing power etc!
My UK phone is rooted on the latest ICS and has various apps frozen with titanium backup manager! It use to be in deep sleep mode for about 68% of the time but since 2 days ago cpu spy says it hasn't been in deep sleep mode! I have installed various apps that kill running apps but the phone fails to sleep!
Any ideas why it isn't sleeping, just sits at 200mhz!
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newgen2005 said:
Thanks, again this setting is disabled on my phone! Still sitting at 200mhz! Though the battery doesn't seem to be draining as much!?
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hello sir..
hmm since i read that you installed various apps that kill running apps, maybe that is cause to kernel wakelock since your system always working to searching what app running and killed it in various time you set
..many system app that switch back on like google app no matter you turn off except you log out your account
or maybe you can try one off the famous airplane metode which is
- switch your phone to airplane mode
- turn off your phone and pull out your battery (until 10 sec or more)
- put again your battery and turn on your phone
- after complete reboot let it for a while then turn off the airplane mode
I had the same problem with audio_out one but only in imilka's paranoid Android.. Couldn't fix it in any way so left the rom..
the reason taskkillers are disputed is because memory works different on android. It reloads certain stuff afterbkilling it, causing a cycle of killing and reloaded that can cause more drain than is intended to safe
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So I've been having some massive drain since I've flashed slim bean. I ran battery calibration, that didn't seen to help. So I checked my battery settings and this is what I saw
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What I can see is wifi on battery drains from wifi alarm on polls for times. Also Facebook apparently has instant notifications on and avast looks like it is checking on Facebook. That means 2 active apps running on wifi with clock running so system isn't going to sleep. Try limiting Facebook checks and do manual checks for between times that it checks. Smartwifi toggle app is also good as if you leave wifi area wifi shuts down saving battery. Alarm well not much goes on there but will wake device to make sure your alarm is accurate.
As a side note I am down to about 1% drain per hour on slimbean overclocked to 1612
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Hi,
I changed the setting to turn off Wi-Fi when the tablet is in sleep mode. However, when I check my battery usage, it indicates that Wi-Fi is on almost 100% of the time.
Can I do anything to fix this?
Try better battery stats available here at XDA. Although it's designed to help you find out what's using your battery, the info the app produces will show you what programs are running the most. Odds are one of those uses wifi and that's what's keeping it on during sleep. Just remember that you'll need to be on battery and not plugged in or docked to gather the app usage info.
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Definitely an app keeping wi-fi awake. I have mine set to never turn off during sleep and I only lose 3-4% overnight. Wakelock Detector is another app that can identify which apps are keeping wi-fi active.
Thanks, I'll try to see if these apps can diagnose the problem.