Develop Bugs

WIFI battery usage

My battery usage for WIFI has never gone above 3% and has only hit that once, normally it is 2% no matter how little or much I use it. What percentage of your battery life is used by your WIFI?
I'm just trying to figure out if the number is accurate and using wifi really does save my battery as much as it appears to do so.
Sent from my Galaxy Nexus using XDA App

I've never really bought in to the whole Wifi saves battery power....I've had the Captivate and now the GN and anytime I leave Wifi on at home, my battery just drains faster. Here is an example, if I leave Wifi off, I've reached about 40 - 48 hours on one charge. If I take my phone off the charger at 6:00am....go to work with Wifi off, come home at 4:00pm and turn Wifi on, by the time I go to bed at 11:00pm my battery is at about 40-50%. In the first scenario with Wifi off, my battery is usually around 70% when I go to bed the first night.
In both of those scenarios, the phone is only being used lightly, but I do see a huge difference if I use Wifi in my overall battery drain. So pretty much these days I just turn on Wifi when I actually need it....but having a 6GB data plan helps in not caring when I use Wifi (for the day to day stuff).

I only use WIFI at home but otherwise have it off. I use Y5 to automatically turn in on when I'm home and off when I leave. It seems to really help me save my battery when at home though since my coverage is spotty since for some reason I cannot stay connected to 4G even though I'm surrounded by the coverage.
That's why I'm asking here if the meter is actually correct because even on the weekend if I'm home all day the meter never shows anything other than 2% after a full days use of downloading apps, surfing the web, messing around on Facebook, and reading things on forums. About 43MB worth of usage and 14 hours and 40 minutes of connectivity to WIFI.

Sprint Galaxy S3 Battery Life has suddenly plummeted

I have had this phone for about 2 weeks, and the battery life has been great. However, today, my battery jumped to 90% within 6 minutes! I was doing nothing different today than I have been. Why has my battery suddenly gotten to be so terrible? What can I do about it? How can I tell the health of the battery? I have attached a picture.
I also calibrated the battery within the first week that I had the device

From what I understand about li-ion batteries, the top 10% charge is usually not accurate. Since it's not good to fill li-ion batteries to the max, they're set to display 100% when they're not actually a 100% (since people would complain that it's not charging fully).
Here's some info about these batteries http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries/
As for your specific issue, I've heard there's a problem with the idle (a lot of ROMs claim to have that fixed). As for helping save battery life, if you idle then looking into JuiceDefender is a good idea. JuiceDefender combined with FreeSG3 ROM have helped me get at least 4 hrs of extra battery.

I completely agree with what you said. Now, in just 45 minutes, my phone has 82% battery left. My phone says that it has been in use for the last 30 minutes, but I haven't touched it - the screen has only been on for 15 minutes total. Does the battery drain seem a bit excessive?

lathamc said:
I completely agree with what you said. Now, in just 45 minutes, my phone has 82% battery left. My phone says that it has been in use for the last 30 minutes, but I haven't touched it - the screen has only been on for 15 minutes total. Does the battery drain seem a bit excessive?
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So I think I see where part of the problem is. Sprint Automatic Connections Optimizer turned Wi-Fi on. I am at my house, but it wouldn't connect to our home Wi-Fi at all. It knows the network and the key, so why wouldn't it connect?

Hmm that's weird... I've had some problems with the Wifi at home too, but so does my Linux machine.. so I think it's something with the router and not the devices themselves. On mine JuiceDefender takes care of it though... if it doesn't connect within a specified amount of time it turns it off and tries again later.

lathamc said:
So I think I see where part of the problem is. Sprint Automatic Connections Optimizer turned Wi-Fi on. I am at my house, but it wouldn't connect to our home Wi-Fi at all. It knows the network and the key, so why wouldn't it connect?
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Click to collapse
Disable the connections manager, and stop the service, it is a huge battery drain!

How do u disable the connections manager?
Sent from my SPH-L710 using xda app-developers app

I think he meant the sprint connections optimizer. I just turned it off, I'll see if it makes a difference.
Sent from my SPH-L710 using xda premium

Running stock with no root yet on my Spring Samsung Galaxy SIII I know that I had my % being displayed when charging my battery and the light went "green" pretty much as soon as it hit 90%. When I unplugged the device it showed 100% for a brief moment and then quickly came down to the 90% that I thought it should have been at all along. Did you have it charging for a long time after it turned "green" or did you just take the device off as soon as it changed from red to green on the indicator light? I still have good overall charge times it is just the top few percent that are kind of wonky.
Hope it helps as a possible reason why that happened to you. I know when I wake up and have had it charging overnight it tends to stay near the 100 mark a lot longer still as well.

I'm happy as can be! I use CM10 nightly and KT747 kernel w/stock battery and I'm a pretty heavy user, no games on these stats but definitely suggest this setup for anyone that's having issues w/ battery. Also the fastest.. Literally secs to open web pages and flies through everything..
To see what's keeping your device awake, open terminal emulator & type: su (push enter) type dumpsys alarm (press enter) this will give you a list of what's waking your device. I use better battery stats app which there's also a forum on here for that's a great reference. Sounds to me like you should drain it to 0% and charge back up. This should solve any calibration issues you may or may not have. What's your signal like where you've been getting mass drainage? That does play a large roll in drain as well..

Wakelocks: VBUS_PRESENT & WLAN _RX_WAKE

I'm running CM10 10.0 Stable and the latest Lightening ZAP Kernel.
I've always had problems with battery life that are somewhat random. Sometimes my phone will last over 24 hours with the same usage as when my phone decides to die in 8 hours. This is very concerning because I know a phone should not be this random with the same apps and usage charge after charge.
I've relentlessly searched for the wakelocks that keep this crazy phone awake using BetterBatteryStats, CPU Spy, Battery Monitor Widget and GSam Battery Monitor. My average charge time on a rooted stock 4.0.4 was about 20 hours. My average time on CM10 stable is 8 hours. I now carry around an external USB battery all the time because of this with a wall charger and multiple micro USB cables in my arsenal.
Now I'm playing with undervolting but I know that's not getting to the source.
My phone does seem to go into deep sleep when unplugged but only 50% of the time. I've read that VBUS_PRESENT is when charging with a non friendly charger. Well I've been using a stock Samsung charger that came with my phone and it still shows up. WLAN_RX_WAKE I'm totally not sure of...it uses a huge amount of time keeping the phone awake why?? I'm not sure. It didn't used to do this and I leave WiFi, Data, and Syncing on. I have the same outcome whether Google Now is on or off as well.
Any help would be really really appreciated. I think I have battled battery run time since I started using Android. I wish it wasn't like that because I love the openness of the operating system compared to iOS which I have used in the original iPhone and every generation up to the iPhone 4. If you guys require screenshots I'd be more than happy to give them. There are so many smart minds here that know far more than me and I know it!!

I'm having the same issue running Gangnam Style CM10 on my Evo 3D. I'm seeing huge wlan_rx_wake wakelock that I haven't seen on any other ROM (same networks).
Apparently, it's multicast network traffic that the phone should ignore, but instead wakes up and replies.
Sucks.

Hmmm strange. I reformatted my phone and wiped everything clean...and reinstalled CM10 stable with the newest lighting zap kernel. But now the phone app is taking a massive amount of power from wakelocks and CPU. My phone is left with a higher than average CPU idle running at 1566MHz for 40% of the time before my battery dies at 10%/hour. Something is really up and I can't figure it out. I know that when my phone was operating at 4+ hours per charge the temp would be under 30C. Now running at idle it's 33C. I normally never feel the back of the phone heat up near the camera LED but now it sometimes feels warm or hot when it's deciding to try to deplete power within a few hours. This is a strange thing....I don't hear of people with CM10 having this problem...or does everyone think having an 8-10 hour burn time is normal?

Just switched to Slim Bean ROM (JB) and still have wlan_rx_wake jamming me up on wifi networks.

u guys need to change the settings under the advanced menu to tell your phone when to enable/disable WiFi sleeping, the delay amount, that's what the wlan_RX wakelock is
as the op stated,vbus is indeed when using a charger other than the stock Samsung one that came with your phone

What should the delay amount be? I used to have it set to 5 minutes under "only when plugged in". I use my OEM Samsung charger and nothing else but I still get vbus.
I just did a test and turned all data and wifi off. Battery drain has been completely normal at less than 1%/hour. This is great so now I need to find my internet culprit. I get the same type of nasty battery drain with Wifi on, Data on, Wifi & Data on.

icenight89 said:
u guys need to change the settings under the advanced menu to tell your phone when to enable/disable WiFi sleeping, the delay amount, that's what the wlan_RX wakelock is
as the op stated,vbus is indeed when using a charger other than the stock Samsung one that came with your phone
Click to expand...
Click to collapse
I'd rather have the wifi never sleep. Why use a low speed, higher power radio (3g) when you have access to a wifi network.
Wlan_rx_wake never kept the phone awake on gingerbread ROMs.

[Q] battery problems?

Hello.
I'm using nexus 7 2013 lte for a couple of weeks and i experience some troubles that quite bother me. Device is running android 4.4.2 installed OTA.
First of all, battery drain in sleep mode is kind of unpredictable. At night (8-9 hours to be exact) device can consume 3%, 5%, 15 or even 20. My first thought was to check installed third-party apps which could cause it. But i didn't manage to find the reason of the problem, the statistics of battery looks OK, tablet can work fine for a couple of days, and then same thing occurs. I found no dependance to 3g and wifi on/off: there can be 3% for night when device is just left with wireless connections, and there can be 10-15% with airplane mode on and precursory reboot. Battery drain happens only in sleep mode, and battery times are absolutely normal on heavy tasks (10 hours of 720p video, 3:45 of gaming). The other device I use works just fine with same apps installed, same settings and cellular carrier: consumption on idle is low and constant.
Some weird jumps in battery level also can be noticed: from current level to 100% and back on: example 1
example 2
No chargers or usb were connected, temperature around was constant. Can't find any reasonable explanation to these jumps.
So should I suspect that my item has any hardware faults of battery, or there can be some software issues?
And another minor question: how good should be wifi reception on nexus? The "other device" I mentioned above (which is galaxy note 2) has solid, good level and speed of connection, while nexus seems quite worse on this subject. For example, in the room where I am at the moment, note has 3/4 bars in wifi symbol and fine, constant speed, and nexus has 1 or 2 bars of 4, and connection looks pretty laggy.
Thanks in advance for any response.

Try factory resetting and testing sleep mode battery consumption again without installing/touching anything. If its a hardware problem, it will happen again. Wifi reception should be the same or better then note normally, but as i said, factory reset and try, if the problem(s) persist, its a hardware problem.

Those battery graph peaks were still present last night.
I've just performed factory reset, will see if it changes behavior of my device.
Thanks!

So, after factory reset on pure system without any non-stock apps I got these results:
Battery consumption on idle was usually between 1 and 1.5% per hour. There was a little of instability (marked red on the screenshot), but just a little. Nothing like sudden 15% per hour that used to happen before. Is 1.5% good enough for sleep mode on stock firmware with 3g(not lte, 3g) and wifi turned on?
No jumps to 100% were noticed during these 24 hours, but they didn't happen every day. They worried me most, so I'll continue to check if they occur again. Hope they disappeared after factory reset.
As for the next step, I gonna install my usual apps and see if it affects battery perfomance.
By the way, about wifi reception: it still had 1-2 bars where galaxy note has 3-4. But then I ran some speedtests, and connection speed on nexus was usually significantly faster then note's. So wifi works just fine, it is just a matter of wifi icon calibration.

For a bit my batt life was suffering. I found it worked to turn it off, charge it fully, and then turn it on again. I actually wanted to know if there r any good task killers for it?

How Bad is Your WiFi Standby Drain?

Reading through some battery threads I was told that the "proper" way to check your overnight drain was to charge up to 100% and not touch it until the next morning. I tried this last night and WiFi drain was in the 30% range (I used my phone before taking the screenshot which is why it's at 22%) with a total drop of 7% (100-93% over 8 hours).
Does this seem high?
I've got WiFi, NFC, battery saver location, mobile data, and double tap to wake on. The phone is rooted and I'm using a custom kernel (but I'm pretty sure it happened with the stock kernel too). I also have an Android Wear watch attached all night. On AOSP ROMs on my OP3T overnight drain was around 2% if I started at 100% and WiFi was never more than maybe 6% of total drain. Again, I'm not asking how to fix this, I'm just wondering if this is something that others are experiencing.
Thanks!

Mine dropped 2% over four hours of sleep. I'll try with battery saver on.

Mine averages about 3% in 8hrs with wifi on, I'll post a screenshot tomorrow, on freedomos using simplegx kernel

My WiFi drain is very low during idle. Like most flagships of this era.

mine is as same as op, but last night i charged it upto 74 and slept and when i got up after 6 hrs or so it dropped 2 %, strange ... maybe it's the way the phone is charged and calibrated for dash charging

I'm loosing 4-5% in 8 hours.

xocomaox said:
My WiFi drain is very low during idle. Like most flagships of this era.
Click to expand...
Click to collapse
Thanks for these screenshots. Obviously I don't have nearly the SOT that you do in my screenshot, but it looks like if our SOTs were the same you'd probably have similar WiFi percent usage.

Mine's been surprisingly bad - at least, worse than my Moto G5S, Galaxy S8+ or iPhone 8 Plus were. I'm losing like 5-7% every four hours, my battery drain while connected to wifi at work is way worse than either of the other phones mentioned too.
All in all it's kind of disappointing considering how good the OP5T is in literally every other regard.

shadeau said:
Thanks for these screenshots. Obviously I don't have nearly the SOT that you do in my screenshot, but it looks like if our SOTs were the same you'd probably have similar WiFi percent usage.
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Click to collapse
We may have similar WiFi usage. But my drain is about .5% per hour, overnight. I don't consider that high, and battery consumption has to be attributed to something. Here is my current usage since yesterday's charge.

On 8.0 the WiFi drain % is even lower, but idle drain per hour is the same. So it doesn't really matter.

Very bad.. Battery go. Down quickly in night..

My wifi drain is also really bad on the latest 4.7.4
Hope they release a fix soon...
Edit... I did a fresh install with stock 4.7.4 and it isn't as bad but still is present. At least it's more tolerable.
Sent from my ONEPLUS A5010 using Tapatalk

So I did another test last night (4.7.4 and SimpleGX kernel) and had 3% drain. With all the comments here I think the high percentage of WiFi is normal and probably not affecting battery life a lot. I am starting to think the kernel may be providing better results than stock 4.7.4 though since a lot of people are mentioning poor battery on 4.7.4.

I don't even know how long, all I can say is my battery drains 3% every 9 and a half hours. Both bluetooth and wifi was on. This is on the stock rom and kernal, not sure how you guys have such high battery drain... Are you guys sure it isn't another app hijacking your battery? Because from my experience the battery stats isn't always perfect. Sometimes I was told that it was my screen (on my old phone) in which it was actually a 3rd party app. After removing the app, my battery drain went a lot slower than usual.

Has anyone tried this toggle in Developer options?

showofdeth said:
Has anyone tried this toggle in Developer options?
Click to expand...
Click to collapse
Just tried that setting last night and it doesn't make much difference.
For all wondering I have an Android Wear device connected 24/7 and location set to battery saving. I also keep NFC and data on all night. I'm not using screen-off gestures though.

I wish it was only 7% or something like that on my OP5T.
I used to be one of you 3%-battery-"drain"-at-night-guys, until the official update to Oreo. Now it uses 36% in 6h38m, of which WiFi is reported being 29% (1044mah, despite 0m active and background usage reported). There is 2.8MB additional use according to the WiFi data usage report that was set to count from today, yet the numbers per app have decreased, so there goes reliability on that. I haven't added or removed any apps, only wiped cache after the update. On standby, it only takes 18 hours for it to drain, which used to be several days.
Another weird thing is that WiFi is terribly slow since the same update, but only on this device. (No numbers yet)
Right now my plan is to test all the mentioned related settings, as well as WiFi off, make screenshots after each nightly test, and finally do a complete wipe and perform the same tests with a minimum of apps, and then redo them again with my usual set of apps. It could still be one or more apps that misbehave on Oreo specifically I suppose, so if there's any indication for that, I will start eliminating apps one by one until I find the culprit.