QUestion about having GPS on/off - EVO 4G Q&A, Help & Troubleshooting

Since I had my evo I have always left my GPS on because I thought it just sat idle and didn't use any battery until it was called on by an app.
Now I'm not really sure if leaving it on helps drain the battery or not but I'm going to try leaving it off to test.
My question is, by turning it off...what does it affect? I use beautiful widgets with a clock/location/weather.. so will turning it off mess up anything with that? Like maybe location/weather? If I have to update manually and leaving gps off doesn't mess with anything else as far as phone operations then it may be worth doing if it helps battery life.
Anyone care to elaborate a little on their experience with it on or off?
Thanks guys

i keep mine on, still get about 2 days use outta my evo.
i think with it off, some apps use the data signal instead to trianglulate your signal by using the cell towers, but please correct me if im wrong.

Ahh so leaving it off may actually hurt my battery when the apps are trying to use it...hmm

ANyone else?

It shouldnt effect the battery unless something uses it. You can also use tasker to turn it on when you are using certain apps, that way you can make sure its not being used when you don't want it to be.
The weather widget should be able to get your general location from the network and what towers you are near.

I actually leave my GPS on all the time, but turn OFF the network location. It's supposed to save some battery, although it does potentially take longer to get a GPS fix since it's not assisted by the towers.

Related

Doubled battery life - but there's a down side

there is a setting under settings / wireless and networks / mobile networks that says "enable always on mobile data"
Switching this to off about doubled my battery life and everything still seemed to work okay as far as data goes. All my apps worked including things that check or update periodically in the background - so I'm not sure what this feature does.
The only downside is that the phone would crash periodically in areas with poor reception. It would go back to the sprint boot animation and come up after a minute and the uptime would not be reset.
Imconvinced part of the battery life problem is due ton inefficient use of data, but I'm wondering what can be done about it without sacrificing stability. Ahylne else have a similar experience or willing to try it out or have more information?
Trying this out, seeing what it effects it has on my normally used apps. So far (first 20 minutes of doing it) everything seems to run fine. I would guess this causes the phone to "hibernate" the 3g radio whilst locked.
I started doing this on Hero and continue to do it on the Evo. The biggest issue is that if you are using pandora (or similar app), it causes problems when the phone goes to sleep.
The setting stops your 3g connection when the screen goes to sleep. This prevents the phone from updating email, twitter or whatever else you use. As soon as you turn the screen on, it turns on 3g, downloads your email etc.
I check my phone often enough (for the time or whatever) that I don't mind not getting my email immediately (it downloads when I turn the screen on).
This has saves a ton of battery life. The only time I enable always on mobile network is to listen to pandora. I have done this since day 1 and have had no issues.
I tried this last week and it made a massive difference in battery life. I turned it back on though because I do like my phone to download things while it is idle. I also don't want to get used to the improved battery life just to have to switch it back later.
i dont know if any of you have heard of juice defender what it does the same thing pretty much. with a few exceptions. whereby you can set the program up to allow your phone to take data even if your screen is off at a certain duration of time, then it will go back to sleep.
thats a really simple explanation of what the app does. if anyone of you does decide to use the app let me know i can share my settings more specifically. I have increases my battery life by 87% and i have have 0 problems.
I have this option unchecked and not only has my battery life improved, but I don't notice any performance or stability issues.
Also, my data continues to download in the background as normal (regardless of whether the screen is on or off). I have Facebook and Twitter set to download data every so often and it continues to do so. Even Google Voice will notify me of messages even if the screen is off.
I think what this option does is, when checked, makes the radio work hard to find and keep a data connection (especially in low signal areas). I notice that with the option unchecked, my data connection drops a bit more often than with it on. I don't mind that though seeing that the data connection simply reconnects automatically and almost instantly.
thanks!
10char
Would you all mind doing an experiment for me? Turn this option off (so data is not constantly on) and turn your screen on and put it in your microwave so it loses signal*.
Watch it and see if it crashes. I suspect something about this setting being off is causing the phone to crash when it loses its cell connection momentarily.
*Don't turn on your microwave.
Okay so after more research I'm pretty sure the main instigator of poor battery life is the data connection constantly going wild. According to SystemPanel my phone hangs out doing nothing downloading at 100-200Kbps for large amounts of time. Not sure what it's downloading.
To find out what apps were causing this I used Spare Parts and saw this:
Click for full size
So a process with the PID of "0" is what is using most of the data connection, followed by UID 10011 which is contact/calendar/mail sync. I can click through to 10011 and get details, but if I try to click on PID "0" I get a force close.
There is also another preference under Accounts & Sync for "background data" and "auto-sync." I'm not sure what the difference is between this background data setting and the one in wireless & networks that says "enable always-on mobile data." Anyone have any thoughts on that?
Also interesting is what was happening when I had always on data disabled:
Click for full size
You can see where my phone was crashing but look at my battery life before and after the crash. It looks like it has dipped significantly. Also, the crashes only lasted a minute while the phone rebooted, not nearly as long as what was recorded here - so it's possible something was going on with the battery life before the phone crashed.
juice defender settings
mastermayhm069 said:
i dont know if any of you have heard of juice defender what it does the same thing pretty much. with a few exceptions. whereby you can set the program up to allow your phone to take data even if your screen is off at a certain duration of time, then it will go back to sleep.
thats a really simple explanation of what the app does. if anyone of you does decide to use the app let me know i can share my settings more specifically. I have increases my battery life by 87% and i have have 0 problems.
Click to expand...
Click to collapse
Could you please post you settings that you use with Juice Defender. Also, please post any suggestions about Juice Defender and Ultimate Juice.
Thanks, John.........
mastermayhm069 said:
i dont know if any of you have heard of juice defender what it does the same thing pretty much. with a few exceptions. whereby you can set the program up to allow your phone to take data even if your screen is off at a certain duration of time, then it will go back to sleep.
thats a really simple explanation of what the app does. if anyone of you does decide to use the app let me know i can share my settings more specifically. I have increases my battery life by 87% and i have have 0 problems.
Click to expand...
Click to collapse
I swore Juice Defender only works with GSM and not CDMA.
It even say this when you go to download the app. Although I did just google it an apparently people have it going on the Motorola Droid rooted.
Who with Android experience wants to prove this?
OMGWTF_BBQ said:
I swore Juice Defender only works with GSM and not CDMA.
It even say this when you go to download the app. Although I did just google it an apparently people have it going on the Motorola Droid rooted.
Who with Android experience wants to prove this?
Click to expand...
Click to collapse
+1 I thought this was the case too. i unchecked the data option. It's been a full day and no reboots
I'm running Juice Defender today and my battery life seems even worse. I'm talking 20-25% drop per hour.
SOMETHING is wrong here.
prjkthack said:
I have this option unchecked and not only has my battery life improved, but I don't notice any performance or stability issues.
Also, my data continues to download in the background as normal (regardless of whether the screen is on or off). I have Facebook and Twitter set to download data every so often and it continues to do so. Even Google Voice will notify me of messages even if the screen is off.
I think what this option does is, when checked, makes the radio work hard to find and keep a data connection (especially in low signal areas). I notice that with the option unchecked, my data connection drops a bit more often than with it on. I don't mind that though seeing that the data connection simply reconnects automatically and almost instantly.
Click to expand...
Click to collapse
The option is not meant to enable/disable applications from using the data connection when the screen is off, so applications should be able to continue updating.
What the option is meant to do is to determine whether your phone should maintain data connectivity all the time, even when there are no apps using data. Unchecking the option means that when an app needs data, it must first connect, then make its request. This makes it take a little longer (or maybe a lot longer for 4G which seems to take longer to initialize a connection).

Battery - Wi-Fi and Awake always solid blue

So I've been trying to get more life out of my battery, I get decent now, but not the 18+ hours I've seen other people getting. I think the main problem here is, if I go view the Applications -> Battery Usage screen, the "Wi-Fi" and "Awake" bars are always full blue, even when the phone hasn't been touched in a couple hours.
Does anyone know what actually causes these to now sleep? Is it push email? Or some other setting I'm missing?
Thanks
RubenRybnik said:
So I've been trying to get more life out of my battery, I get decent now, but not the 18+ hours I've seen other people getting. I think the main problem here is, if I go view the Applications -> Battery Usage screen, the "Wi-Fi" and "Awake" bars are always full blue, even when the phone hasn't been touched in a couple hours.
Does anyone know what actually causes these to now sleep? Is it push email? Or some other setting I'm missing?
Thanks
Click to expand...
Click to collapse
Look and find out you can start by turning off wifi if not using it post your screen shots of battery use someone may help
Sent from my SPH-D710 using xda premium
RubenRybnik said:
So I've been trying to get more life out of my battery, I get decent now, but not the 18+ hours I've seen other people getting. I think the main problem here is, if I go view the Applications -> Battery Usage screen, the "Wi-Fi" and "Awake" bars are always full blue, even when the phone hasn't been touched in a couple hours.
Does anyone know what actually causes these to now sleep? Is it push email? Or some other setting I'm missing?
Thanks
Click to expand...
Click to collapse
Try Menu/Settings/Wireless and Network/Wi-Fi Settings. Then press Menu/Advanced/Wi-Fi- sleep policy.
Play with those settings. You are probably set to "Never". Folks have actually been reporting better battery life with this setting (powering on and shutting down the wifi eats up battery) You can play around with it to get your own results.
Hit thanks if this helps!
pojieps said:
Try Menu/Settings/Wireless and Network/Wi-Fi Settings. Then press Menu/Advanced/Wi-Fi- sleep policy.
Play with those settings. You are probably set to "Never". Folks have actually been reporting better battery life with this setting (powering on and shutting down the wifi eats up battery) You can play around with it to get your own results.
Hit thanks if this helps!
Click to expand...
Click to collapse
Ah...yes, it is set to never. So leaving it on "never" gets better results, say if you're at home and always have a wifi connection? Also, if the wi-fi is on, does that mean the device can't sleep I take it, that's what's keeping the device awake with screen off?
Thanks for the tip.
RubenRybnik said:
Ah...yes, it is set to never. So leaving it on "never" gets better results, say if you're at home and always have a wifi connection? Also, if the wi-fi is on, does that mean the device can't sleep I take it, that's what's keeping the device awake with screen off?
Thanks for the tip.
Click to expand...
Click to collapse
I've heard both sides to this argument, and frankly I don't think most people understand why changing it does, or in other cases does not help.
I suspect that the answer to your issue isn't going to be found here. Here's the theory:
- Setting wifi policy to "Sleep - Never" results in better battery life for some; it's likely because these individuals have a fairly low 3g signal, which tends to draw more battery when periodic updates/synchronization occurs (e.g., gmail, calendar, facebook, etc.). By leaving wifi Sleep set to never, the wifi (which THEORETICALLY uses less power than 3g) can do the work instead.
- Setting wifi policy to "Sleep - When Screen is Off" can result in better battery life for a number of reasons, many of the underlying issues being hard to identify. For example, if your router tends to send a lot of 'noise' and wake up your phone, having wi-fi disabled will prevent this. Location services in the OS - which you've probably permitted to 'help locate you faster' - even when you are NOT connected to a wifi network - will periodically ping wireless networks around you to help facilitate faster geolocation. This uses battery as well.
But don't confuse the generalities that have spawned from people's anecdotal situations with what could be a very different problem.
Was your phone primarily located in one location during most of the 'awake' period? If so, then it was probably connected to the same router most of that time. If so, it really shouldn't matter what the setting was for Advanced Wifi - the phone should still sleep.
If you turn off wi-fi on the device, and the device then sleeps, then you've narrowed the issue some, but that is not a solution, because what are you going to do, not use wifi?
You've got to dig deeper; your issue may be any of the following - rogue app that keeps a wakelock, rogue app that updates too frequently, wifi modem issue, router issue, OS issue, etc.
In short, you need to figure out what's keeping the phone awake. Get CPU Spy and Better Battery Stats to help you get insight into what's keeping the device awake.
Capp5050 said:
I've heard both sides to this argument, and frankly I don't think most people understand why changing it does, or in other cases does not help.
I suspect that the answer to your issue isn't going to be found here. Here's the theory:
- Setting wifi policy to "Sleep - Never" results in better battery life for some; it's likely because these individuals have a fairly low 3g signal, which tends to draw more battery when periodic updates/synchronization occurs (e.g., gmail, calendar, facebook, etc.). By leaving wifi Sleep set to never, the wifi (which THEORETICALLY uses less power than 3g) can do the work instead.
- Setting wifi policy to "Sleep - When Screen is Off" can result in better battery life for a number of reasons, many of the underlying issues being hard to identify. For example, if your router tends to send a lot of 'noise' and wake up your phone, having wi-fi disabled will prevent this. Location services in the OS - which you've probably permitted to 'help locate you faster' - even when you are NOT connected to a wifi network - will periodically ping wireless networks around you to help facilitate faster geolocation. This uses battery as well.
But don't confuse the generalities that have spawned from people's anecdotal situations with what could be a very different problem.
Was your phone primarily located in one location during most of the 'awake' period? If so, then it was probably connected to the same router most of that time. If so, it really shouldn't matter what the setting was for Advanced Wifi - the phone should still sleep.
If you turn off wi-fi on the device, and the device then sleeps, then you've narrowed the issue some, but that is not a solution, because what are you going to do, not use wifi?
You've got to dig deeper; your issue may be any of the following - rogue app that keeps a wakelock, rogue app that updates too frequently, wifi modem issue, router issue, OS issue, etc.
In short, you need to figure out what's keeping the phone awake. Get CPU Spy and Better Battery Stats to help you get insight into what's keeping the device awake.
Click to expand...
Click to collapse
Thank you for that very informative post. My phone was on my desk all day today( worked from home ) and wi-fi is set to always on, and it never slept, not even once.
I'll try disabling wi-fi( should have done this earlier to be honest and checked ) and then I'll download those apps, I just got Badass Battery Monitor, I'll check out the two you recommended as well. Thanks for the info!
Your phone should still go into deep sleep with wifi on. If it doesn't then you have something else wakelocking your phone. However, if wifi is set to never sleep, and wifi is enabled, the bar on the battery chart will always be solid blue.
So just installed CPU Spy, it looks like IM+ is the biggest user of wakelocks. I like to always be signed in to my accounts, but not at such a huge cost of battery, does anyone know of a better multi IM client that will push updates to you? I used to have IM+ on the iPhone( yea I know, just switched two months ago, and never looking back ) and the push on it worked great. The 'push' IM+ says it has is awful, most of the time I never get my IMs sent to me at all.
Also have skype signed on all the time, not sure if that is wakelock'ing anything, I'll have to keep an eye on it, it didn't show up on CPU Spy.
Try IMO, free from the Android Market. Its a multi-IM client that combines most common clients including Skype. I've used it. It creates some wakelocks, but not sufficient to wake the phone. I don't use IM very often so I'd be curious to hear how it works for you.
Capp5050 said:
Try IMO, free from the Android Market. Its a multi-IM client that combines most common clients including Skype. I've used it. It creates some wakelocks, but not sufficient to wake the phone. I don't use IM very often so I'd be curious to hear how it works for you.
Click to expand...
Click to collapse
Thanks ... Giving it a try today, I'll let you know how it goes.
Capp5050 said:
Try IMO, free from the Android Market. Its a multi-IM client that combines most common clients including Skype. I've used it. It creates some wakelocks, but not sufficient to wake the phone. I don't use IM very often so I'd be curious to hear how it works for you.
Click to expand...
Click to collapse
So been trying IMO the past couple days. Seems much better than IM+. Haven't seen any disconnects, I get my IMs about 30sec - 1min after the computer gets them, which is fine, and the wake-locking is extremely minimal. IM+ was awful with the wake-locking.
So that clears up the Always awake issue, flashed Blazer 3.8 last night, so can't comment on battery too much yet, also calibrating today.
RubenRybnik said:
So been trying IMO the past couple days. Seems much better than IM+. Haven't seen any disconnects, I get my IMs about 30sec - 1min after the computer gets them, which is fine, and the wake-locking is extremely minimal. IM+ was awful with the wake-locking.
So that clears up the Always awake issue, flashed Blazer 3.8 last night, so can't comment on battery too much yet, also calibrating today.
Click to expand...
Click to collapse
Thanks for the feedback, glad to hear it helped, and I now feel a little more confident leaving my IM 'on' more often.

[Q] Battery issue: sometimes it drains very quickly

Sometimes the battery works great, lasts a couple days. And sometimes, I get strange spikes where the battery drains extremely quickly (see attached images).
I have tried:
1. New device - I swapped my unit yesterday
2. Hard reset - restore all factory settings (and erase everything) off the phone
3. Battery cycle - i.e. let the battery run out entirely, recharge it from scratch
I have also tried diagnosing the issue via the stock battery app, GO Power Master, and BetterBatteryStats, but I don't see anything out of the ordinary when the battery usage spike occurs. Maybe there is some process running wild, but it doesn't seem to do anything...
Has anyone had similar issues? The only non-Google Play store app I have installed is Visual Voicemail - the apk I downloaded from this board.
You have tried everything I would normally suggest, but might have noticed something. Your sharp drop coincides with that red band on your signal bar. The red part signifying no cell tower signal. The sharp drop seems to start there. Is your phone stuck searching for cell towers when it has already re-established a signal? The earlier dip in the battery also has a red bar under it.
Also battery performance is not linear. If you are at 50% after 24 hours, you will not necessarily get another 24 hours. I am alwaysfinding myself at 50% after 18 hours and think, "Cool, I've found the right kernel" but sure enough I'm still plugging it into charge at 24 hours!
I know you say you normally get two days (which is very good) but this is all I can think of.
I use a powerful automation app called Tasker. With it you can set any phone setting to any phone condition. I've just checked, and it is possible to set a profile based on signal strength. With this you could specify a weak or no signal to do any manner of things, from play a notification sound, to turn off 3G and auto-sync. Set an exit task and it will also turn 3G and auto-sync back on when signal strength is healthy again. Might be worth a try.
Edit: If you have root access, Tasker supports the app 'Quick Boot Plus' as a plugin. With this you could set Tasker to reboot your phone if it is out of signal for more than 'x' seconds. I know it might not be very practical, but it would tell you if you we are looking at the real culprit.
Another edit: Scratch that. You could set Tasker thatif it sees no signal for 'x' seconds, turn on airplane mode, wait 'y' seconds, turn off airplane mode. No need to buy a plugin.
Thanks, wnp_79 - appreciate the thoughtful response!
Yes, that's a good point - there is a drop in battery starting with the red line for the signal. I take the subway to/from work in the morning and evening. But I don't see any problems connecting after I get outside (i.e. it doesn't seem to be searching for signal).
Perhaps next time I can try setting airplane mode on/off when I notice the battery draining quickly - and see if that helps the issue. If it does, clearly it's a signal issue.
I like the Tasker idea, I will give that a try! Thank you for the suggestion.
I wasn't by any means expecting another 24 hrs, but that drain of "50%" occured over a span of like 3 hours... with no screen usage (i.e. the phone was just sitting next to me at the desk, supposedly "idle").
Whatever you do, don't cycle your battery deeply unnecessarily.
Sent from my HTC One X using Tapatalk 2
Thanks tsleng, will keep that in mind.
I guess I am surprised other people haven't seen this issue. Maybe it's something specific to my software...
I've got this issue but it's down to my signal. At home it's fine and battery last's me well but as soon as I get to work my battery starts to dip due to Vodafone having poorer signal. Bad signal is killing my battery too bad we can't change radio's as of yet due to no S-OFF.
what happens when we can s-off? i mean what adv will we encounter regarding with the issues that we are having?
mohaimed said:
what happens when we can s-off? i mean what adv will we encounter regarding with the issues that we are having?
Click to expand...
Click to collapse
Well S-OFF, we can unlock bootloader without having to use HTCDev meaning we can revert back to stock easily and without it tampering the status. We can lock it back to it's original state.
We can flash kernels without having to use fastboot.
We can flash radios. By flashing other radios we can improve our signals if one radio is bad, an improved signal is friendlier on the battery.
I get a weird spike too but mine causes the phone to die. Also mine was done overnight when I was sleeping. (see attachment) I'm not really sure what I can do. I hope this was a one time problem...but i'm not so sure. I'm still under warnty and this is my second HOX
neocryte said:
Sometimes the battery works great, lasts a couple days. And sometimes, I get strange spikes where the battery drains extremely quickly (see attached images).
I have tried:
1. New device - I swapped my unit yesterday
2. Hard reset - restore all factory settings (and erase everything) off the phone
3. Battery cycle - i.e. let the battery run out entirely, recharge it from scratch
I have also tried diagnosing the issue via the stock battery app, GO Power Master, and BetterBatteryStats, but I don't see anything out of the ordinary when the battery usage spike occurs. Maybe there is some process running wild, but it doesn't seem to do anything...
Has anyone had similar issues? The only non-Google Play store app I have installed is Visual Voicemail - the apk I downloaded from this board.
Click to expand...
Click to collapse
You have the LTE version of the one x Maybe they can help you there:
http://forum.xda-developers.com/forumdisplay.php?f=1538

Wifi Battery Drain

Hi guys
I have a LTE Note II and have had this battery drain on standby where wifi will absolutely destroy my battery. This has been going on for months and months and I'm just not sure if Samsung are ever going to resolve this and it is quite the pain in the arse.
I've done many tweaks to my phone, and all location services are off. Also, I've set it as a static IP, but nothing seems to help. I think this is related to the wlan_rx_wake wakelock? I get the impression my phone is responding to the wifi and getting woken up constantly.
Does anyone else experience this and do you have any suggestions?
P.S. please don't mention my apps causing it. It definitely is not. I know my way around Android and also, my Nexus 4 with the same setup (but location + google now turned ON) absolutely annihilates my Note II battery life on standby. This is clearly a Samsung problem that they have ignored for the best part of a whole year, and it seems to be related to wifi.
Any help would be greatly appreciated.
Thanks
Do u have some figures about this battery drain to be able to compare with my phone?
It could be a bad modem/connection. What is your configuration?
Primokorn said:
Do u have some figures about this battery drain to be able to compare with my phone?
It could be a bad modem/connection. What is your configuration?
Click to expand...
Click to collapse
No exact figures but I have been observing it for months now and it hasn't been the case with any other phone I use. With wifi on, it'll drain around 20% overnight. With Wifi off, it'll drain 5 or so %. With Wifi on on every other phone I own/owned, it will barely drain at all overnight.
Type *#0011#
Check wifi setting
Sent from my GT-N7100 using xda app-developers app
This is what I got when I entered that it
After *#0011# go to menu and select wifi in order to see if power safe mode is on.
Yeah it is on
Is that bad?
Sent from my Nexus 4 using Tapatalk 4
That's not bad, it improves battery usage. I don't recognize your problem. Does the phone go into deep sleep with wifi on? Which rom do you use?
Hielko said:
That's not bad, it improves battery usage. I don't recognize your problem. Does the phone go into deep sleep with wifi on? Which rom do you use?
Click to expand...
Click to collapse
Stock ROM. And yeah, but it is constantly being woken up.
Sorry for the bump, but this hasn't changed.
I'm not sure if this is to do with just the N7105, but it is something that just won't go away. I'm now finding I lose between 20 and 30% overnight (around 7 hours) with wifi on, or about 10% with data on. With these both turned off but the phone radio still being on, it only drops about 2% in the same time. This was tested with bluetooth/gps and sync turned off.
I don't really have the time to write up everything that I have tried, but suffice to say I have tweaked the phone a lot over the past few months trying to sort this out, but nothing works.
Here is a quick summary of the stuff I have done.
Firstly, I have to run a stock rom and kernel because there is an app I need that will not work on custom roms/kernels. It also doesn't work on root but I have found a procedure to toggle unroot/root when need be and it works fine. Therefore I'm stuck on 4.1.2 as I want to be rooted but I cannot use any custom rom or kernels.
I have tried factory wiping the phone/installing later versions of 4.1.2, etc etc and the same problems still exists with a freshly wiped phone and no apps installed. This problem also doesn't happen with my Nexus 4 or any other phone I have owned with the same setup, so I am very certain it is not due to a misbehaving app.
I have frozen a lot of bloat with titanium backup, I have hibernated a hell of a lot of stuff with greenify (including system app where there are no perceivable negative consequences)
I have added a few tweaks to the build.prop such as to disable fast dormancy and a few other supposed power saving ones which are meant to help with the msm_hsic wakelock.
There are many other things such as setting a static IP, and also tweaking with my router based on some advise I found on these forums. Nothing much has helped.
Location services and google now are off, and I'm not using the Samsung bloatware apps.
I use betterbatterystats and the partial wakelocks are fine. Very low infact.
However, IMO it is two "kernal wakelocks" which are causing me the problem.
wlan_rx_wake - in regards to the wifi
mdm_hsic_pm0 - in regards to the data
These are by no means outrageously high. My estimation is perhaps 10 mins wake up time and around 2000 "expire time" (whatever that means) every 3 hours or so. However, these two are always the highest kernel wakelock depending on if i'm using wifi (wlan_rx_wake) or data (mdm_hsic_pm0). My phone is also not being kept awake too long too in general.. at a guess around 3 hours awake time for every 2 hours screen on time for every 15-20 hours.
I can't remember if these kernel wakelocks were super duper high in the past, and the fixes I tried actually lowered them, but I still notice this massive Idle drain when on data or wifi (just over 1% per hour - or 2-3% per hour respectively).
In regards to the Wifi.. I suspect that packets are being sent from my router which are constantly waking up my phone. Unfortunately, I haven't been able to solve this problem with any of the router-side fixes I've tried.
This leads me to suspect that the wifi and data radio of the N7105 is power hungry, or I've had a faulty unit since day one. I keep hearing about this stellar battery life for this phone but, for me, the best I've ever got is around 20 hours. This may sound good but the problem is it is 20 hours with 6 hours screen on time, or 20 hours with 2 hours screen on time. This doesn't seem to make a difference where I should be getting two days when I only have 2 hours screen on time.
Any help would be greatly appreciated, and any experiances of others with the N7105 may help find out if it indeed is more power hungry. I'd also like to add that my network does not support 4G yet so this is all on 3G and NOT LTE.
Thank you, and sorry for such a long post.
fade2black101 said:
Hi guys
I have a LTE Note II and have had this battery drain on standby where wifi will absolutely destroy my battery. This has been going on for months and months and I'm just not sure if Samsung are ever going to resolve this and it is quite the pain in the arse.
I've done many tweaks to my phone, and all location services are off. Also, I've set it as a static IP, but nothing seems to help. I think this is related to the wlan_rx_wake wakelock? I get the impression my phone is responding to the wifi and getting woken up constantly.
Does anyone else experience this and do you have any suggestions?
P.S. please don't mention my apps causing it. It definitely is not. I know my way around Android and also, my Nexus 4 with the same setup (but location + google now turned ON) absolutely annihilates my Note II battery life on standby. This is clearly a Samsung problem that they have ignored for the best part of a whole year, and it seems to be related to wifi.
Any help would be greatly appreciated.
Thanks
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I ain't expert...
but, I would suggest like this :
Go to wifi, press menu and then Advanced (advanced setting of the wifi).
uncheck/untick "Scanning always available"
"Keep wifi on during sleep" = set to Never.
uncheck / untick "auto network switch btwen wifi network and mobile networks"
all these helps me to minimize the usage of wifi during night times (when I sleep). Anyway, device also need to have a deepsleep
Hope can help you as well.
Sent from the corner of this rounded earth.

Location

Does anyone have any idea why location data keeps automatically switching from Battery Saving to High Accuracy?
Sent from my toaster
@blackknightavalon because Google really messed up when they changed the location method, used to be that it used wireless no matter what, unless you turned it off, the GPS for when you're out and about. Now its just a mess, it'll never be as good as it used to be, its all to do with Google wanting to know where you are so they can improve their maps, know where you are, move a step forward to knowing everything in the world etc etc..its not ideal and not as battery friendly as it used to be but that's the way it is now. Sad really..

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