[Solved-Don't use 5Ghz Wifi]Having standby battery problems - Galaxy Tab S2 Q&A, Help & Troubleshooting

So yeah I'm getting unusual battery drain during the night.
I disabled localisation, I have wifi on yeah but it shouldn't drain this much. Even my phone during the night with wifi+localisation on drains less than this , wth ?
Any idea what might be the culprit ? You can see on my battery graph I played something on the battery for like 45 min then when to sleep, and it decreased at a steady pace during that
https://goo.gl/photos/gvovhWsJZir9uPWJ8 , here's all the relevant photos. shows battery graph , tablet version and all the apps I have installed
Thanks in advance if anyone can help me solve this, because that's really annoying ;w;

Have you tried Doze ?
is it rooted ?
if so, you should have a look at this guide : [GUIDE][21/12]Extreme Battery Life Thread(Greenify+Amplify+Power Nap)✭ by v7
my 9.7 Tab S2 T815 has 0.1% to 0.5% per hour during nights

Haven't tried it no. But in the past I didn't need to. I also have an old galaxy tab 10.1 tablet and it only loses like 1-2% battery during the night. also with wifi constantly on
So why does this tablet drains so much during the night ? x.x Without being able to view wakelocks it's annoying, and I don't wanna root yet since it's still under warranty lol

Doze is good for non rooted devices, it only allow white listed apps to use network without disconnecting your device
---------- Post added at 01:58 PM ---------- Previous post was at 01:57 PM ----------
Mine is under waranty as well, but I rooted it the 1st day I got it, cant live without root ...

Well I'll check it out for next time then
I hope one day there will be a root method that doesn't trip KNOX :/ Would be nice

Tried out Doze for the whole day, and the problem still persists. Constant like 2-4% per hour battery drain when the screen is off ://
It's really annoying, is there any way to find out where it comes from while being unrooted ?

Hey there !
I have set wifi to off during stand by and also disabled bluetooth.
I noticed a huge improvement when I did this.

The culprit has been found !
Turns out using the 5Ghz Wifi of my house caused the drain. I connected to the 2.4Ghz wifi instead and no more drain during the night, complete flat line ^_^

The culprit has been found !
Turns out using the 5Ghz Wifi of my house caused the drain. I connected to the 2.4Ghz wifi instead and no more drain during the night, complete flat line ^_^

Supernico00 said:
The culprit has been found !
Turns out using the 5Ghz Wifi of my house caused the drain. I connected to the 2.4Ghz wifi instead and no more drain during the night, complete flat line ^_^
Click to expand...
Click to collapse
Curious, do you have a ASUS router?
Sent from my SM-T810 using Tapatalk

Hmm it's a B-box 3 from my ISP Proximus (belgian one)

habskilla said:
Curious, do you have a ASUS router?
Sent from my SM-T810 using Tapatalk
Click to expand...
Click to collapse
I have an Asus router, and I'm using 5Ghz, and my standby battery drain is awful. I'll move to a 2.4Ghz band now to see if that helps.
Why did you ask about Asus routers? Is this a known issue?

With my AVM Fritzbox router, standby drain is perfectly fine when connected to 5GHz.

I don't know what the issue is, but I can confirm that 5Ghz was the source of my battery drain as well. Mine's an Asus and the OP said his was a B-box, so clearly this issue affects routers from multiple vendors.

CincyTriGuy said:
I have an Asus router, and I'm using 5Ghz, and my standby battery drain is awful. I'll move to a 2.4Ghz band now to see if that helps.
Why did you ask about Asus routers? Is this a known issue?
Click to expand...
Click to collapse
Yes it is. Google around and you'll see.
Which router do you have?
Sent from my SM-T810 using Tapatalk

habskilla said:
Yes it is. Google around and you'll see.
Which router do you have?
Click to expand...
Click to collapse
RT-AC87U

CincyTriGuy said:
RT-AC87U
Click to expand...
Click to collapse
You have a problem router. Head on over to http://www.snbforums.com/forums/asus-wireless.37/ and have a read. Maybe Merlin's firmware fixes it.
Sent from my SM-T810 using Tapatalk

Related

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
Sent from my IM-T100K using xda app-developers app
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..
Sent from my iPhone using Tapatalk 2
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
Click to expand...
Click to collapse
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
Sent from my TouchPad using Tapatalk HD

[Q] Wi-fi and Battery relation

Hey guys I got a question;
My wi-fi router seems to be broken, wi-fi signal drops too often (not just on my one, it also happens on my nexus 7 and one s so I think it is broken). My question is; does that make battery drain faster? I mean phone is constantly having on and off wi-fi.
Does the whole network get no data incoming, or are you connected to a WiFi that drops it's connections but still broadcasting it's SSID?
I loss incoming data completely. It happens to often, I mean maybe 6-7 times in a minute. And I noticed my phone's battery draining too fast even without me making a call or using an app or anything. So I suspected if that broken wi-fi causing it. If it is not my battery might have some problem too, which I hope not.
Dharkan said:
I loss incoming data completely. It happens to often, I mean maybe 6-7 times in a minute. And I noticed my phone's battery draining too fast even without me making a call or using an app or anything. So I suspected if that broken wi-fi causing it. If it is not my battery might have some problem too, which I hope not.
Click to expand...
Click to collapse
WiFi shouldn't drain any more than usual if incoming data is lost as long as you remain connected to the WiFi. I might be wrong though. Install GSAM Battery Monitor and see what's draining your battery the most. If you need a more detailed one, try Better Battery Stats (it's free for XDA users, it's in the App forum )
ArmedandDangerous said:
WiFi shouldn't drain any more than usual if incoming data is lost as long as you remain connected to the WiFi. I might be wrong though. Install GSAM Battery Monitor and see what's draining your battery the most. If you need a more detailed one, try Better Battery Stats (it's free for XDA users, it's in the App forum )
Click to expand...
Click to collapse
I can't find it.
And the thing is im not connected to wi-fi all the time, that's the problem. Maybe dropping off and connecting back all the time causes battery to drop low faster than usual, that's what I'm wondering.
Dharkan said:
I can't find it.
And the thing is im not connected to wi-fi all the time, that's the problem. Maybe dropping off and connecting back all the time causes battery to drop low faster than usual, that's what I'm wondering.
Click to expand...
Click to collapse
As long as you can see the WiFI logo on your phone it shouldn't matter whether there is a connection or not for battery drain.
BBS is here
http://forum.xda-developers.com/showthread.php?t=1179809
ArmedandDangerous said:
As long as you can see the WiFI logo on your phone it shouldn't matter whether there is a connection or not for battery drain.
BBS is here
http://forum.xda-developers.com/showthread.php?t=1179809
Click to expand...
Click to collapse
WIFI logo disappears too.
Dharkan said:
WIFI logo disappears too.
Click to expand...
Click to collapse
Then yes it will drain. Your router is dropping the network as well as the connection, so that will drain a lot of battery cos the phone is constantly scanning for available networks when your router is down.
ArmedandDangerous said:
Then yes it will drain. Your router is dropping the network as well as the connection, so that will drain a lot of battery cos the phone is constantly scanning for available networks when your router is down.
Click to expand...
Click to collapse
Thank you sooo much. Now I can ask to my ISP for a new router. Thanks again.
Dharkan said:
Thank you sooo much. Now I can ask to my ISP for a new router. Thanks again.
Click to expand...
Click to collapse
You're welcome

[Q] Horrible battery on 4.3 sense roms?

Has anyone else had this problem? since upgrading to a 4.3 sense based rom (tried 3 different roms), my battery life has become horrible..i can barely get 2 hours of screen on time whereas i used to get 4+ on 4.2.2 roms.
i know alot of people have said that 4.3 improves battery, but it hasnt for me, its done the opposite.
also has anyone noticed strange heating up of the device? for example in asphalt 8 the device thats slightly hot and then cools down while playing. but in games like candy crush or zynga poker the device continuously gets hotter and hotter..
tips/fixes/stories anyone?
Mine has been really good. Like, 3-4 hours screen time good. When I'm on wifi (N only, G wifi drains a lot) my battery percent just flatlines on the graph until I pick up the phone again. Sounds like a rogue app since I don't have this issue. I run ARHD 20.1.
Sent from my HTC One using xda app-developers app
Bhavpreet said:
Has anyone else had this problem? since upgrading to a 4.3 sense based rom (tried 3 different roms), my battery life has become horrible..i can barely get 2 hours of screen on time whereas i used to get 4+ on 4.2.2 roms.
i know alot of people have said that 4.3 improves battery, but it hasnt for me, its done the opposite.
also has anyone noticed strange heating up of the device? for example in asphalt 8 the device thats slightly hot and then cools down while playing. but in games like candy crush or zynga poker the device continuously gets hotter and hotter..
tips/fixes/stories anyone?
Click to expand...
Click to collapse
did you upgrade your firmware to 4.3 ( 3.09.401.1 ) also ?
met few guys who had the same problem and upgrading FW helped.
good luck
metal571 said:
Mine has been really good. Like, 3-4 hours screen time good. When I'm on wifi (N only, G wifi drains a lot) my battery percent just flatlines on the graph until I pick up the phone again. Sounds like a rogue app since I don't have this issue. I run ARHD 20.1.
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
I'm running arhd 20.1 aswell. And I would LOVE to see that happen again, my battery drains around 10% overnight, and I'm a really late sleeper, so that means in 5 hours it's lost 10% on standby..and it's weird cause WiFi shuts off after about two hours,so I know that's not causing the problem.
App usage shows android system as the app using the most battery. When I check in the morning it shows android system and kernel to be the top two users.
Could it be a radio problem? I've seen a decrease in signal since ive upgraded to the 4A.17 radio from firmware 2.24.
I'm thinking about flashing the minsense Rom or even a ge rom and see if that helps the problem.
It doesn't seem to be a rogue app cause I actually have less apps then I did on 4.2.2, and none that are new..
Sent from my HTC One using xda app-developers app
Bhavpreet said:
I'm running arhd 20.1 aswell. And I would LOVE to see that happen again, my battery drains around 10% overnight, and I'm a really late sleeper, so that means in 5 hours it's lost 10% on standby..and it's weird cause WiFi shuts off after about two hours,so I know that's not causing the problem.
App usage shows android system as the app using the most battery. When I check in the morning it shows android system and kernel to be the top two users.
Could it be a radio problem? I've seen a decrease in signal since ive upgraded to the 4A.17 radio from firmware 2.24.
I'm thinking about flashing the minsense Rom or even a ge rom and see if that helps the problem.
It doesn't seem to be a rogue app cause I actually have less apps then I did on 4.2.2, and none that are new..
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
I'm still running the current T-Mobile firmware, not 3.x. (I'm still S-ON with hboot 1.44) Thought that was worth noting.
Have you tried putting the phone on WCDMA/GSM auto instead? If your LTE signal is weak (or any kind of signal is weak in general) I see this phone's battery life usually take a nose dive. It has so far from my testing saved me a ton of battery to switch the phone manually into GSM only when I'm inside a building at work to get more bars, then switch back to LTE auto when I leave. Try leaving it on overnight on different radio settings, and with and without wifi. It could be a cell radio drain. And btw get GSAM battery monitor, the stock stats don't seem right to me. Android System being high in the HTC battery stats tells you nothing really from what I'm seeing so far.
metal571 said:
I'm still running the current T-Mobile firmware, not 3.x. (I'm still S-ON with hboot 1.44) Thought that was worth noting.
Have you tried putting the phone on WCDMA/GSM auto instead? If your LTE signal is weak (or any kind of signal is weak in general) I see this phone's battery life usually take a nose dive. It has so far from my testing saved me a ton of battery to switch the phone manually into GSM only when I'm inside a building at work to get more bars, then switch back to LTE auto when I leave. Try leaving it on overnight on different radio settings, and with and without wifi. It could be a cell radio drain. And btw get GSAM battery monitor, the stock stats don't seem right to me. Android System being high in the HTC battery stats tells you nothing really from what I'm seeing so far.
Click to expand...
Click to collapse
the funny thing is i dont have data, since i get wifi wherever i am. i also think its a radio problem though, my gsm signal never seems to be full, and people constantly tell me on the phone that they cant hear me. so what im doing (right now) is flashing a ge rom, specifically sinless rom, then im going to flash the new ge radio, 4A.18, and see how that plays out, prolly going to flash a 4.3 kernel aswell so i can uc to 162mhz or whatever the value is.
i seriously believe its the radio+lack of kernel on 4.3 sense roms that are causing this problem for me. so once this is all done ill test it for the rest of the day and see how it goes. thanks so much for your help
Bhavpreet said:
I'm running arhd 20.1 aswell. And I would LOVE to see that happen again, my battery drains around 10% overnight, and I'm a really late sleeper, so that means in 5 hours it's lost 10% on standby..and it's weird cause WiFi shuts off after about two hours,so I know that's not causing the problem.
App usage shows android system as the app using the most battery. When I check in the morning it shows android system and kernel to be the top two users.
Could it be a radio problem? I've seen a decrease in signal since ive upgraded to the 4A.17 radio from firmware 2.24.
Click to expand...
Click to collapse
If you don't use any apps, of course system uses the most.
You need to check for wakelocks. If you have unexpected battery drain, it's likely that the phone is not sleeping properly, i.e., being kept awake. Betterbatterystats, gsam, wakelock detector etc.
What was the change in signal attenuation, or are you just saying the the display bars are different?
metal571 said:
I'm still running the current T-Mobile firmware, not 3.x. (I'm still S-ON with hboot 1.44) Thought that was worth noting.
Have you tried putting the phone on WCDMA/GSM auto instead? If your LTE signal is weak (or any kind of signal is weak in general) I see this phone's battery life usually take a nose dive. It has so far from my testing saved me a ton of battery to switch the phone manually into GSM only when I'm inside a building at work to get more bars, then switch back to LTE auto when I leave. Try leaving it on overnight on different radio settings, and with and without wifi. It could be a cell radio drain. And btw get GSAM battery monitor, the stock stats don't seem right to me. Android System being high in the HTC battery stats tells you nothing really from what I'm seeing so far.
Click to expand...
Click to collapse
BenPope said:
If you don't use any apps, of course system uses the most.
You need to check for wakelocks. If you have unexpected battery drain, it's likely that the phone is not sleeping properly, i.e., being kept awake. Betterbatterystats, gsam, wakelock detector etc.
What was the change in signal attenuation, or are you just saying the the display bars are different?
Click to expand...
Click to collapse
i use apps, just nothing new compared to when i was on 4.2.2.
and no wakelocks according to gsam, i lost 20% overnight (7 hours)
i dont get what it is. i upgraded the radio to 4.19 now, but for the signal issues, it included lower bars, bad audio in calls, and random loss of wifi.
i removed basically every app, besides some essentials like facebook, whatsapp, and a few others.
i tried switching to an ge rom, but i just cant stay on it for too long, vanilla android is so plain compared to sense.
so the last thing i can think of, is a rom known for its battery life. not asking for a comparison, just your opinion in which rom gives the best battery on 4.3. any suggestions?
Bhavpreet said:
i use apps, just nothing new compared to when i was on 4.2.2.
and no wakelocks according to gsam, i lost 20% overnight (7 hours)
i dont get what it is. i upgraded the radio to 4.19 now, but for the signal issues, it included lower bars, bad audio in calls, and random loss of wifi.
i removed basically every app, besides some essentials like facebook, whatsapp, and a few others.
i tried switching to an ge rom, but i just cant stay on it for too long, vanilla android is so plain compared to sense.
so the last thing i can think of, is a rom known for its battery life. not asking for a comparison, just your opinion in which rom gives the best battery on 4.3. any suggestions?
Click to expand...
Click to collapse
Charge your phone up all the way, put it in airplane mode, and unplug it for an hour then don't touch it. Then post your battery percentage. If it isn't still 100 or 99 then you have a more severe problem that actually relates to the battery itself.
metal571 said:
Charge your phone up all the way, put it in airplane mode, and unplug it for an hour then don't touch it. Then post your battery percentage. If it isn't still 100 or 99 then you have a more severe problem that actually relates to the battery itself.
Click to expand...
Click to collapse
good idea, testing it now, will report back in an hour.
metal571 said:
Charge your phone up all the way, put it in airplane mode, and unplug it for an hour then don't touch it. Then post your battery percentage. If it isn't still 100 or 99 then you have a more severe problem that actually relates to the battery itself.
Click to expand...
Click to collapse
been an hour and 5 minutes, still 100%.
so im guessing it has something to do with the radio?
Bhavpreet said:
been an hour and 5 minutes, still 100%.
so im guessing it has something to do with the radio?
Click to expand...
Click to collapse
Show us a graph of your signal strength from GSAM, and show us a screenshot with how many bars you have. At least you know now that the battery is definitely not shot. It is probably mobile data related...hmm did you ever try letting the phone sit with mobile data disabled as well? It should drain almost as minimally as airplane mode.
metal571 said:
Show us a graph of your signal strength from GSAM, and show us a screenshot with how many bars you have. At least you know now that the battery is definitely not shot. It is probably mobile data related...hmm did you ever try letting the phone sit with mobile data disabled as well? It should drain almost as minimally as airplane mode.
Click to expand...
Click to collapse
funny thing is, i dont have data..long story.
i just use wifi as its always available basically everywhere i am.
and thanks for all your help so far, helped me eliminate one possible problem
Bhavpreet said:
funny thing is, i dont have data..long story.
i just use wifi as its always available basically everywhere i am.
and thanks for all your help so far, helped me eliminate one possible problem
Click to expand...
Click to collapse
So wait, your signal is really good but your phone drains like crazy, and while you're on WiFi? Okay, what wifi router are you using and is it G or N and is it dual band?
metal571 said:
So wait, your signal is really good but your phone drains like crazy, and while you're on WiFi? Okay, what wifi router are you using and is it G or N and is it dual band?
Click to expand...
Click to collapse
its absurd i know..its already down to 93% with 9 minutes screen on..
and its a dual band router, im normally connected to the 2.4ghz band, and its with wireless ac, which the one supports. Which is weird cause i thought ac improved battery life..
edit: im an idiot, wireless ac only works on 5ghz bands, but that still doesnt explain the drain on wireless n..as my previous router was also wireless n
Bhavpreet said:
its absurd i know..its already down to 93% with 9 minutes screen on..
and its a dual band router, im normally connected to the 2.4ghz band, and its with wireless ac, which the one supports. Which is weird cause i thought ac improved battery life..
edit: im an idiot, wireless ac only works on 5ghz bands, but that still doesnt explain the drain on wireless n..as my previous router was also wireless n
Click to expand...
Click to collapse
Have you tried 5 ghz N by forcing the router or your phone to operate only at N speed? I use a TP-Link dual band N router and I remember seeing s drain of about 4 percent overnight for 8 hours of full idle with full sync.
I have tried with both 2.4ghz n and 5.2ghz ac, same problem persists
Awake is 3x screen on, I don't think that's normal, somethings keeping the phone awake much longer
Sent from my HTC One using xda app-developers app
metal571 said:
Have you tried 5 ghz N by forcing the router or your phone to operate only at N speed? I use a TP-Link dual band N router and I remember seeing s drain of about 4 percent overnight for 8 hours of full idle with full sync.
Click to expand...
Click to collapse
so ive done a bunch of other tests, and i can confirm its wifi thats causing this massive drain, not wakelocks, not roms, or anything else.
when the phone is left with wifi on, but not being connected to any network, battery drain is minimal overnight.
its the same on both 2.4ghz and 5ghz bands, so it this a router problem? if so, do you know any tips that could fix it?
Do you have "Best wifi performance" checked? That seems to eat battery.
iElvis said:
Do you have "Best wifi performance" checked? That seems to eat battery.
Click to expand...
Click to collapse
i have no option for best wifi performance, just "wifi optimization". i found the problem, it has something to do with my new router and its bad compatibility with android devices. the phone seems to be awake 2x the screen on time and the main culprit is "wlan_rx_wake" wakelock

n910c note 4 wifi battery drain bug or hardware issue, owners please contribute

I have noticed that the WiFi on my note 4 drains 30% of the phones battery on average and this exceeds the battery drain of the screen even with an SOT of 4 hours.
this is easily overlooked because the stock battery monitor does not show how much battery WiFi consumes. It only shows if its on or not. However the GSAM app will show it.
My phone is an n910c.
Smart network switch and WiFi scanning are both off. Phone is connected to a stable WiFi but when in the WiFi menu it shows that its scanning ever few seconds. this might be normal.
Attached are screenshots of battery consumption of WiFi and my settings.
Please post here if you have the same issue.
I find the GSAM app very incorrect, just look at the SOT, my said max screen on time per charge like 5 hours while i was at my 6th, so automatically was wrong.
Scanning is off for lication services but you have notification for open networks which requires frequent scanning and you have keep alive during sleep.
Sent from my SM-N910T using XDA Free mobile app
If you have set your Location service in "high accuracy" or "power saving" modes, then you have also permitted use of Google's location service, which scans wi-fi and/or mobile networks at all times - including when you have supposedly turned your wi-fi "off".
Have you tried a reset of your phone and see if the problem is still there?
Is that an n910c?
henklbr said:
Have you tried a reset of your phone and see if the problem is still there?
Click to expand...
Click to collapse
shinasurada said:
Is that an n910c?
Click to expand...
Click to collapse
As stated in my signature: SM-N910F
Just got confirmation from another n910c owner that the WiFi can account for up to 53% 53% of the battery consumption when turned on. From what I see on the battery thread, the n910f even when connected over WiFi for 40 hours only takes less than 3%.
If we figure this out we will definitely be seeing Snapdragon like battery life.
I'm trying to combat this myself. On another note, how do you have access to WiFi Timer? I don't have that as an option. N910V 4.4.4
That would explain so much. The phone still lasts me a day but I was always surprised by the WiFi battery stat in GSAM and thought it might just be reporting it wrong. I hope this issue (if it is indeed one) is addressed in the 5.0 ROM magically ;_;
I too had massive battery problems. I couldn't use my phone for more than 8 hours.
Then I downloaded this:
https://play.google.com/store/apps/details?id=com.rrr.android.mediaserverkiller
Set it to kill the server every 1 or two hours.
Now my battery lasts three days!
N910U wifi is 3% for me
Thanks for the datapoint ausboy.
Seems like n910c is the only variant affected.
Samsung should take note, this is why the battery life on the n910u is much better even though both are exynos.
I'm on 4g now and the battery life on 4g is way better than with wifI on. I've tried different routers and it doesn't make too much of a difference.
Not sure why you guys are getting such poor battery life I am getting consistently 7-8 hours screen on time with location on Bluetooth on connected to my gear s sync on pushing 5 email accounts wfi about 75%and when I lte I don't really have a good signal most of the time - I also have a 10,000 mah zero lemon battery but I get such good battery life with the stock battery it is never really needed the extra time
And do you have the n910f or n910c?
DEdwards22 said:
I'm trying to combat this myself. On another note, how do you have access to WiFi Timer? I don't have that as an option. N910V 4.4.4
Click to expand...
Click to collapse
There is a exposed based app called amplify which you can chance service scan times for pretty much everything. Highly reccomend.
snowblind2142 said:
There is a exposed based app called amplify which you can chance service scan times for pretty much everything. Highly reccomend.
Click to expand...
Click to collapse
I actually meant the feature that let's you set up specific times for WiFi to be turned on automatically. I've got a third party app for that currently and would prefer to have the Samsung version.
Can anyone with the n910c try other firmwares and report back if the n910c still experiences the same problems?
So far two users with the Malaysian firmare experience this wifI battery drain issue. I'm not sure if the others are on the same fw.
Hi, I have been noticing that I have not had that great a battery life as with other users of the note 4. Was searching all this while for an explanation until I came across this thread. I am also using a SM-N910C with XSG firmware that is UAE and am also facing this drain. I installed GSAM as you mentioned and can see that Wifi is accounting for up to 27% for me. I will post the screenshots once I run through and entire charge cycle.
Had earlier contacted Samsung online support about the same but they simply asked to go to a service center and get the battery checked. But I guess that this is a particular issue to only the N910C.
shinasurada said:
Can anyone with the n910c try other firmwares and report back if the n910c still experiences the same problems?
So far two users with the Malaysian firmare experience this wifI battery drain issue. I'm not sure if the others are on the same fw.
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Click to collapse
shinasurada said:
Can anyone with the n910c try other firmwares and report back if the n910c still experiences the same problems?
So far two users with the Malaysian firmare experience this wifI battery drain issue. I'm not sure if the others are on the same fw.
Click to expand...
Click to collapse
I m with pre-installed firmware from U.A.E, no root, no disabled app, using as it's came out of the box, SM-N 910C

Battery drain on Android 6 Marshmallow when IDLE

I've found several threads about drain, but all of them are Android 5 related.
Unfortunately I still have this problem on Marshmallow.
I don't notice it when using the phone, but while idle, it drains battery. Attaching the screenshot indicating I charged my phone at around 10 pm and at 1 pm next day it was already at 15%. Screen on time was only 2 hours.
Wakelock Detector does not work on Marshmallow. Installed BetterBattery Stats to try to find out what's causing this, but If any body's experienced it and has any idea what should I do, please share your opinion.
I've got MRA58R, bootloader unlocked, rooted, root aps list is: call recorder, adaway, betterbattery stats, es file explorer, gmd gesture control, nexus 6 double tap to wake.
Don't know if any of this is really important, but still. The rest is pure stock installed with full wipe.
PROBLEM SOLVED:
Nexus 6 on Android 6 has bug with 5 Ghz WiFi networks, use 2.4 Ghz and your battery will be fine!
Today before going to sleep I charged the phone to 100%.
I left it with wifi on for the night. In the morning after 8 hours I had 65% left. Screen on time was only 42 mins.
Attaching screens from battery and better battery stats.
What should I do next?
I would appreciate any opinion.
I wanted to try turning off Google Now (it helped my friend on Nexus 4), but on Nexus 6 I just can't find this ON\OFF switch of Google Now, how to turn it off?
I'm running pure nexus and get none of that. Around 6 hours sot. I'm not sure what would cause this, have not seen it
Sent from my Nexus 6 using XDA Free mobile app
donnyp1 said:
I'm running pure nexus and get none of that. Around 6 hours sot. I'm not sure what would cause this, have not seen it
Sent from my Nexus 6 using XDA Free mobile app
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Click to collapse
What are the possible ways to detect what's causing this?
cL0uD` said:
Today before going to sleep I charged the phone to 100%.
I left it with wifi on for the night. In the morning after 8 hours I had 65% left. Screen on time was only 42 mins.
Attaching screens from battery and better battery stats.
What should I do next?
I would appreciate any opinion.
I wanted to try turning off Google Now (it helped my friend on Nexus 4), but on Nexus 6 I just can't find this ON\OFF switch of Google Now, how to turn it off?
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Click to collapse
i bet, 99.999%, that its your wifi. try leaving it off your wifi then check idle drain. my work wifi does the same thing, so i rarely use it.
simms22 said:
i bet, 99.999%, that its your wifi. try leaving it off your wifi then check idle drain. my work wifi does the same thing, so i rarely use it.
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Click to collapse
This. I had a similar issue a while back (although it didn't happen every time). One thing someone told me was to avoid the 5g band on wifi. Whoever it was correctly determined that I was connected to the 5g band of wifi at home and suggested I use it on the 2.4 instead. I did so and my drain dropped significantly. Now if I charge to full, leave it on my nightstand overnight off charge, I wake up 6 or 7 hours later and lose *maybe* 1% per hour. That's with wifi, bluetooth, gps all on etc.
simms22 said:
i bet, 99.999%, that its your wifi. try leaving it off your wifi then check idle drain. my work wifi does the same thing, so i rarely use it.
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Click to collapse
I must say you've revived my spirit! I am always using WiFi in order to save mobile traffic, it's on even when screen's off.
Morpherios said:
This. I had a similar issue a while back (although it didn't happen every time). One thing someone told me was to avoid the 5g band on wifi. Whoever it was correctly determined that I was connected to the 5g band of wifi at home and suggested I use it on the 2.4 instead. I did so and my drain dropped significantly. Now if I charge to full, leave it on my nightstand overnight off charge, I wake up 6 or 7 hours later and lose *maybe* 1% per hour. That's with wifi, bluetooth, gps all on etc.
Click to expand...
Click to collapse
And you've made my expectations even better, because I am using 5Ghz band all the time!
I will turn off WiFi now and give it a try! Thank you guys!
I will then test 2.4Ghz WiFi to see if it's really only 5Ghz WiFi that's causing the problems
cL0uD` said:
I must say you've revived my spirit! I am always using WiFi in order to save mobile traffic, it's on even when screen's off.
And you've made my expectations even better, because I am using 5Ghz band all the time!
I will turn off WiFi now and give it a try! Thank you guys!
I will then test 2.4Ghz WiFi to see if it's really only 5Ghz WiFi that's causing the problems
Click to expand...
Click to collapse
I'll keep my fingers crossed for you that this fixes the issue. Additionally I should have noted, the person who suggested I use the 2.4 band instead of the 5 specifically noted that there is a documented "bug" where 5g wifi bands cause significant drain. That's apparently the reason that 5g specifically tends to be the culprit.
cL0uD` said:
I must say you've revived my spirit! I am always using WiFi in order to save mobile traffic, it's on even when screen's off.
And you've made my expectations even better, because I am using 5Ghz band all the time!
I will turn off WiFi now and give it a try! Thank you guys!
I will then test 2.4Ghz WiFi to see if it's really only 5Ghz WiFi that's causing the problems
Click to expand...
Click to collapse
I have a similar problem as well. I have had wifi turned off all day today and its at the top of the list on battery usage. I have looked at every possible wifi option and turned it off. I dont understand what could be causing this. Im only bootloader unlocked, non-rooted, running stock image MRA58K
dcjose48 said:
I have a similar problem as well. I have had wifi turned off all day today and its at the top of the list on battery usage. I have looked at every possible wifi option and turned it off. I dont understand what could be causing this. Im only bootloader unlocked, non-rooted, running stock image MRA58K
Click to expand...
Click to collapse
When you set it up did you set it to allow it to keep wifi scanning even when it is off for the location settings? I leave my wifi on 99% of the time and my battery life is great.
zelendel said:
When you set it up did you set it to allow it to keep wifi scanning even when it is off for the location settings? I leave my wifi on 99% of the time and my battery life is great.
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Click to collapse
I dont remember if I did but I did turn that setting off when I was trying to diagnose the issue. I don't know if maybe it's a 6.0 bug that needs to be fixed. Good thing that being a nexus I hope it won't take too long.
I updated the firmware on my router and after doing thus none of my devices would enter power save mode on the 5ghz radio anymore and drain is now massive (check your router logs)
I tried flashing back to the prior firmware but still no go, so it must have been a driver update on the Quantanna radio as that's the only thing that was updated and it's a known issue with my particular model.
That helped me! Thank you guys! I connected to 2.4 Ghz and lost only 6% overnight!
I wish this information was easier to find, I'll update first post when I get home, it'll probably be useful to a lot of people.
l0ud_sil3nc3 said:
I updated the firmware on my router and after doing thus none of my devices would enter power save mode on the 5ghz radio anymore and drain is now massive (check your router logs)
I tried flashing back to the prior firmware but still no go, so it must have been a driver update on the Quantanna radio as that's the only thing that was updated and it's a known issue with my particular model.
Click to expand...
Click to collapse
It is a known issue with Quantenna radios on multiple routers; my ASUS RT-AC87 is one of them. Specifically as you said, on the 5GHz band. Switching to 2.4GHz wireless can fix this for the time being on Quantenna-based routers.
I've also had times where my battery seemed to have excessive drain if the cell signal dropped to non-existent; the N6 appears to drain fairly quickly searching for a signal. Unfortunately, AT&T occasionally drops in my house, and that's the carrier my work is on, so I have to live with it.

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