Database Develop

battery life question

There is a lot of conflicting info about Wifi vs 3g.
Which is better to use in term of saving battery?
Does Signal strength of either affect battery life?
IF using wifi, should you have it to always on ( when in wifi zone of course) or should you have it set to sleep when screens off?

I've done testing on that and I've noticed that when using the phone in long intervals, its better to disable connections but when using the phone in frequent bursts it's better to just leave it on. But this is when you are in wifi range the entire time.
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I typically have my wifi (and 3g) disable itself when the screen goes off. It seems to restore very quickly. I use Juice Defender (in market) to manage this, which I believe does a pretty good job improving battery life.

wbcollins said:
I typically have my wifi (and 3g) disable itself when the screen goes off. It seems to restore very quickly. I use Juice Defender (in market) to manage this, which I believe does a pretty good job improving battery life.
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Completely agree, some people say juice defender drains your battery, but don't believe them haha
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with the whole jD controversy. I'm assuming it has to do with how often the phone is coming out of sleep. If your using your phone every 5 or ten minuets a day then JD probably is going to use more battery then not having it vs lets say you let your phone sleep for half an hour or hours at a time...
Turning a car on and off ( im assuming) takes more gas then letting it run for a few minuets ( correct me if im wrong, but its just an analogy ;] ) but leaving your car run for a hour because your going to use it ina bit isnt effective at all.

Agreed that turning off networking when not needed (Wifi or 3g) will help battery life.
Signal strength of 3G and Wifi will impact battery life, as both protocols will adjust the power when the signal strength is high - low. Your phone will also crank up the power when the signal for basic voice service is weak to keep you connected.

I think over the course of a day at work, juice defender pays off. You can use it in lots of different ways, though the interface is a little clumsy. It also helps me, with help from juice plotter, to determine if my data connections are indeed staying off when I want them to or consuming more energy than they should. When my phone is in my pocket, I don't want it doing much.

can anyone get into more detail about the question at hand?
as in what is better then what .
2 wifi bars better then 2 3g bars?
which uses LESS power ?

IMO, i would say wifi uses less power since the signal doesn't need to travel far to get to your access point vs a 3G signal that needs to go a mile to get to the cell tower. But I'm not an electrical engineer so take it for what it's worth. I leave wifi enabled and use JuiceDefender to turn it on and off as needed. I'm more concerned about data usage since for me wifi is unlimited and 3G is not.

most ISPs limit Bandwidth to 250GB a month. so its not unlimited... so try to stay under that ;]

My experience, turn off wifi is better for bettery life. The battery level almost constant when the wifi is off. The level drop about 2-4% Per hours if wifi is on.
Sent from my cappy.

If you leave wifi on when you're not connected, it drains a lot of battery.
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[Q] Does wifi turn off during sleeping mode?

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.

[Q] Battery drain from wifi on CM9?

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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battery drain on webos and android

I have hp touchpad 16gb, recentlythe battery drain more than badly, on webos >-500ma on with wifi off normal use, and when wifi on it >-1900ma without using just let it stand by with wifi and screen on,
when on android it's -20ma on stand by and >-2000ma when wifi on without use
Is there anyone having the same problem, and know how to fix it
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Have the exact same issue on my HP touch pad 32gb wifi. My battery drain is 500-750 ma on both android and webos with wifi off. It is a constant 1750ma on android and webos with wifi on. The upper half on the back becomes too hot with wifi on.
It seems to be a wifi hardware or router problem and not is os related?
Tried several things as below but none helped.
Acme uninstall and clean acme install - solved no wifi issue in cm10.1 but no change in wifi battery drain
Reset webos ,touch pad wifi fix patch etc
Have Asus rt-n16 router - tried changing dtim , beacon interval etc
Reset the router
Update router to latest Asus firmware of 7-7-13
Changing router channels etc
Seems this issue is not very rare as several people have reported this issue on webos nations. Link
Any help will be much appreciated.
Thanks

Keeping the wifi on, without even connecting to a wireless network results in huge battery drain as described above.
Does this mean wifi hardware is at fault and not a router problem?
Anybody..
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Honestly, I'll bet it's your WiFi hardware. My battery is fine in webOS and Android when I leave WiFi off, but when I turn it on in Android I drop a few percent instantly.
Your router shouldn't be at fault if your battery is still draining with WiFi off. Have you overclocked or done anything else that could adversely affect battery life? Try enabling airplane mode for a while and see if that saves your battery.
Sent from my SAMSUNG-SGH-I747

WMH7 said:
Honestly, I'll bet it's your WiFi hardware. My battery is fine in webOS and Android when I leave WiFi off, but when I turn it on in Android I drop a few percent instantly.
Your router shouldn't be at fault if your battery is still draining with WiFi off. Have you overclocked or done anything else that could adversely affect battery life? Try enabling airplane mode for a while and see if that saves your battery.
Sent from my SAMSUNG-SGH-I747
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Thanks wmh7 for the reply.
My touch pad is not overclocked or not using any mods.
Wifi battery drain is present in both webos and android. The drain starts as soon as I switch on wifi and persists even if I connect to router or not. Airplane and wifi off modes are fine with battery drain. But without wifi what's the fun of using touch pad.
The heat with wifi on is also a major issue.
As you mentioned I also think my touch pad wifi hardware is at fault.
Thanks
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Mackay Rom battery

Welcome guys
Does anyone know what's the best kernel for increasing battery life time
thnx all

you can increase battery life in every kernel. Under clock your cpu or change the governor. There are few apps for this, best for me is set cpu

SloAngel said:
you can increase battery life in every kernel. Under clock your cpu or change the governor. There are few apps for this, best for me is set cpu
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I'm using mackay kernel and my governor is ondemandX
But under clocking will make the phone too slow (which I cannot get used to)
but in some roms like v30B ICS and I remember cm7 and Zeus
the whole night(wifi off / mobile data off / GPS off / Bluetooth off) just connected to network and it may consumes only 2%-3%
So is there any thing to do with Macaky rom/kernel
thnx

from 85% to 18% in just 6 Hours wifi on but not connected and screen off and everything else was off
I think this is huge now I will try BBS

hemo-ali said:
from 85% to 18% in just 6 Hours wifi on but not connected and screen off and everything else was off
I think this is huge now I will try BBS
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Set wifi to off, when screen is off, also I really recommend Greenify, this saves a lot of juice, if you freeze the right apps
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I also strongly recommend Greenify.
I have purchased the paid version and have most of the apps (including system ones) greenified. Battery life significantly improved and no problem with receiving messages etc.
I use "Better wifi on/off" as well, to automatically turn wifi off when my home network is not connected.
I would also advise switching automatic sync off. That's the culprit of battery drain for my OB.
Hope these helps.

Hi, all CM 10/CM10.1 roms seems to be more battery draining.