Develop Bugs

Greatly improved battery life (CDMA)

Last night I restored my phone using the factory image. For some reason I anticipate an OTA soon so I wanted to be ready. Anyhow, before I suffered from the battery drain bug. I forgot to charge my phone last night, and didn't realize it until I got in my car and put it on the car charger and it said 89%. My first thought was that my battery drained over 10% in the hour I was getting ready and not using it! Then I went into battery settings and found out I never charged it.. then I found some pleasant... well, I'll just show you.
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As you can see, I lost less than 5% battery during the 6+ hours my phone was unplugged. I had the phone in the living room charging while watching a movie. Then I unplugged and used it for about 20 minutes in the bedroom which accounts for the first rapid drop in battery. But after I set it down, the phone went into a coma. And I can't see exactly, but it looks like it was only 2 or 3% which is great!
Not sure what changed, I still have the same apps installed, even Facebook. I did, however, NOT disable VZ backup assistant like I normally do. Maybe that is what causes the OS to go bonkers? Thoughts?
Sent from my Galaxy Nexus using XDA App

I got about 20 hours out of mine yesterday (extended battery) with moderate usage (texting, ebay, facebook, web) This is after unlocking the bootloader and rooting. Unlocking the bootloader resets the phone to factory state. I've read a few other posts around the web where battery life is greatly improved after a factory reset. Android OS is still the main things devouring my battery, but I almost don't care with the performance I'm getting. I should also mention that I wiped battery stats from CWM and then calibrated the battery on first charge.
I'm no dev, so I don't know why a reset would help. Then again, maybe it was wiping battery stats and calibrating that helped me. Just my $.02

How did you calibrate the battery?

There's a free tool in the market that will calibrate for you. Have to be rooted though. Just search for calibrate.
Sent from my Galaxy Nexus using XDA App

Surprised this isn't getting more acknowledgement. Any one else experience the same after a reset?
Sent from my Galaxy Nexus using XDA App

Guess maybe I'm one of the lucky few...I've always had this type of battery life. The phone just sips power while the screen is off.
While it is on...well that's different. I keep the brightness high and get about 2-2.5 hours of screen time before it powers off.

The interesting thing here is that it seems that you have the Android OS constantly waking up the phone but yet it still barely uses battery.
Do you have location services turned on or off?

Turned on. I noticed that too but the overall awake time is low. Usually it would be over half of the entire time on battery, sometimes 100%.
Sent from my Galaxy Nexus using XDA App

I used 50% in about 3 hours on my extended battery.
fml.

Great battery life, but you didnt really use your phone much.
Your "Screen on" is only about 15% of those 6 hours. Which ends up being about an hour.
Still, none the less, great battery life/power consumption.

rpnunez said:
Great battery life, but you didnt really use your phone much.
Your "Screen on" is only about 15% of those 6 hours. Which ends up being about an hour.
Still, none the less, great battery life/power consumption.
Click to expand...
Click to collapse
I think you missed the point. I said this was done while I was sleeping. Many people are experiencing extreme battery drain even when they aren't using the phone, as was I. After restoring from the factory image, my issue seems to be gone.
Sent from my Galaxy Nexus using XDA App

kangxi said:
I think you missed the point. I said this was done while I was sleeping. Many people are experiencing extreme battery drain even when they aren't using the phone, as was I. After restoring from the factory image, my issue seems to be gone.
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
I unplugged my phone at 11:30 pm with 98%, woke up at 7:30 am today and it dropped to 76%. So a 20% drop in 8 hrs with the phone just sitting there with wi-fi on and no apps running. It'd be very interesting to see if a factory restore would help.
How's the battery life now that you're using it?

Im thinking of unlocking and rooting mine tonight. havent had a moment to read the walkthrough just yet.

i noticed this too last night/today. i went to sleep after installing bugless beast 4.0.3 cdma, left it off the charger, and today i saw the chart was pretty much a flat line. i don't recall the exact times, but i'll try to time it out. about 8 hours
i wonder if all the initial extreme battery drain reports are due to the 'wowanewphone' effect, where you are molesting your phone 24/7, as opposed to the typical day-to-day use you'll eventually fall back into

1.5 hour battery life

Battery life goes down 1% every minute the screen is on... This is rediculous. I'm running the latest franco kernel + liquid rom.

Uhhh cool story? Use your phone an entire day and post your battery stats when you're at < 5% battery left. Then we can talk about your actual battery life...

Let me bite this troll bait.
I'm sure this phone doesn't last 1.5hours, i'm sure mine doesn't.

@OP that's prolly why the guy sold it
good day.

You should be getting around 4 hours of screen on time, try different kernels if you don't achieve near this. I get 5+ hours everyday usign my set up, just look around at countless other thread to get an idea of what you can do.

chopper the dog said:
@OP that's prolly why the guy sold it
good day.
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I'm sure if I only left the screen on.. it would maybe barely last more than 2 hours.

Might have a bad battery
Sent from my Galaxy Nexus using xda premium

OP looks like you have some serious wakelock problems. And/or bad hardware.

exzacklyright said:
-.-
I'm sure if I only left the screen on.. it would maybe barely last more than 2 hours.
Click to expand...
Click to collapse
Try a different kernal. Come back if that doesn't work.
Sent from my Galaxy Nexus running AOKP+Franco

theking_13 said:
Try a different kernal. Come back if that doesn't work.
Sent from my Galaxy Nexus running AOKP+Franco
Click to expand...
Click to collapse
Um did you see that graph? He has more problems than just the kernel.

Is this cdma/verizon

Mine is and I'll fess up that this is pretty accurate. I can get about 4 hours screen-on time with my 3800mAh extended battery. The 2100mAh extended battery gets me about an hour screen on over the course of a day.
This screen is the hungriest thing I've seen in my life.

stkiswr said:
Is this cdma/verizon
Click to expand...
Click to collapse
yes
theking_13 said:
You should be getting around 4 hours of screen on time, try different kernels if you don't achieve near this. I get 5+ hours everyday usign my set up, just look around at countless other thread to get an idea of what you can do.
Click to expand...
Click to collapse
Which kernels besides franco give good battery life?

If you're getting 1.5 hours battery life then you're NOT using your phone, period. This is a smart phone, if you can manager more than 1 hour then you probably should have kept your StarTAC.
Edit: read a few more posts, wasn't troll bait it turns out.
As someone mentioned earlier in the thread, wakelocks are one avenue to explore. Install Better Battery Stats and follow the instructions/procedures, etc... from its thread here on XDA.

CMNein said:
If you're getting 1.5 hours battery life then you're NOT using your phone, period. This is a smart phone, if you can manager more than 1 hour then you probably should have kept your StarTAC.
Edit: read a few more posts, wasn't troll bait it turns out.
As someone mentioned earlier in the thread, wakelocks are one avenue to explore. Install Better Battery Stats and follow the instructions/procedures, etc... from its thread here on XDA.
Click to expand...
Click to collapse
How does 1.5 hours mean they aren't using the phone..?
Sent from my Galaxy Nexus using xda premium

|Jason8| said:
Mine is and I'll fess up that this is pretty accurate. I can get about 4 hours screen-on time with my 3800mAh extended battery. The 2100mAh extended battery gets me about an hour screen on over the course of a day.
This screen is the hungriest thing I've seen in my life.
Click to expand...
Click to collapse
That's God awful. Are you in a fringe area? The screen isn't THAT bad.. there is something else screwing you over.
Sent from my Galaxy Nexus using xda premium

exzacklyright said:
yes
Which kernels besides franco give good battery life?
Click to expand...
Click to collapse
If you are on 3g/4g and a verizon nexus on stock battery...2 hrs screen time is normal. Get used to it. Sorry. My wife's on stock 4.0.2 does exactly that. Pathetic. We bought an extended battery. Still might get in the 4 hour range. I love the nexus but damn the battery is terrible. I get 6-7 hrs screen on time on my maxx using 3g/4g. Today she got close to 4 hrs but it was a 4g/Wi-Fi mix.
Verizon nexus on 3g gets around 2 hrs screen on time if you actually are using data and keeping everything synced like a smartphone should be able to do.

stkiswr said:
If you are on 3g/4g and a verizon nexus on stock battery...2 hrs screen time is normal. Get used to it. Sorry. My wife's on stock 4.0.2 does exactly that. Pathetic. We bought an extended battery. Still might get in the 4 hour range. I love the nexus but damn the battery is terrible. I get 6-7 hrs screen on time on my maxx using 3g/4g. Today she got close to 4 hrs but it was a 4g/Wi-Fi mix.
Verizon nexus on 3g gets around 2 hrs screen on time if you actually are using data and keeping everything synced like a smartphone should be able to do.
Click to expand...
Click to collapse
THanks for the reply.. guess i have to leave it plugged in all day... lmao.

either that or get a sgs3... when it comes out

Gsm gnex (europe) on 4.0.4 gives between 4-5 h screen-ON time on stock setup and 1750mAh battery. Way to go verizon and LTE for ruining the phone's reputation. Most of the people reporting issues here on the forums are verizon or sprint users.
Sent from my Galaxy Nexus using xda premium

Jellybean batt life observation

Seems jb batt life is pretty bad. 2%/hr idle. Alot of wake locks also from maps and networklocator. :Im assuming all from google now?

Noticed that over the last 24 hours battery life was worse than usual while I was on jellybean. Think you are probably right that Google now is the culprit, I really hope that it gets better before the ota but at the moment it just doesn't seem like it will be worth "upgrading".
Sent from my Cyanogenmodded GNex

emerica243 said:
Seems jb batt life is pretty bad. 2%/hr idle. Alot of wake locks also from maps and networklocator. :Im assuming all from google now?
Click to expand...
Click to collapse
Well, it must be Google Now. I turned it off and my battery is relatively the same as it was before. When using background location update, you can expect it to drain battery a little. Google Now uses your location data quite a bit.

I left my phobe at 96% came back 4 hours later and still on 96
Sent from my Galaxy Nexus using xda premium

I thought JB was pretty good on the battery from my experiences. Did my overnight sleep test and it drained 3% in 8 hours just like ICS did.
As for screen on time, I feel that it's even better than before.
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I would be getting 4 hours screen on time if the battery drained to 0.
I'm very satisfied.
Sent from my Galaxy Nexus using xda premium

I'm getting pretty good batterylife with JB. Over 10 hours on battery and over 3 hours of screentime and I still got 40% left with 2000mah oem battery.

I have yet to flash JB, but one thing concerns me. Is this not just a dev preview and not the final product that will be pushed out mid-July? Not to sound harsh, but I don't see why complaints are being made about battery life at this stage of JB. Just my 2 cents, fyi...
Sent from my Galaxy Nexus using xda app-developers app

My battery life is no different.
You also have to remember this is a developers preview build and not the official release.
Sent from my Galaxy Nexus using xda premium

My battery life over the ~12 hours i had jelly installed seemed the same. Good standvy times also. I think it will depend on how much of the new stuff google added you use that will determine battery life. Some of that stuff will make a big impact.
butter and jelly please...

leelaa said:
I left my phobe at 96% came back 4 hours later and still on 96
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
What kernel are you on? and what freq\gov?

emerica243 said:
What kernel are you on? and what freq\gov?
Click to expand...
Click to collapse
All stock, changed nothing at all, for me its best that way (for now)
Sent from my Galaxy Nexus using xda premium

Even though its just a Dev preview and to early to comment on this, I think its about the same on ICS if not better.
Completely stock , not even rooted.
Sent from my Galaxy Nexus using Tapatalk 2

If you are getting bad battery life and wake issues, check your apps. I've heard LightFlow was causing wakelocks b/c it isn't optimzied for JB yet. I've deleted it until they can get it updated. So far, my battery life hasn't been great b/c I can't keep my hands off of it

Yeah, I would agree that battery life seems pretty good. It seems a little worse on Franco.kernel than stock, but hey, it's a new kernel and he is still trying to get all the kinks worked out. Also, no wakelocks on Light Flow, but I hope they update it soon, lots of my notifications stopped working.

Ehh I don't think its terrible at 2% an hour. Better than 10% an hour. I'll take a little drain for the beauty of JB
Sent from my JellyBelly Gnex

IMO I think it's draining a little fast, but I think that's because I keep flashing kernels and add-ons which reboots and causes the battery to drain super fast... and I've been messing with apps a lot too. So I'm gonna give it another day or two for a definitive answer.

kristovaher said:
Well, it must be Google Now. I turned it off and my battery is relatively the same as it was before. When using background location update, you can expect it to drain battery a little. Google Now uses your location data quite a bit.
Click to expand...
Click to collapse
How do i turn it off
Sent from my Jelly Beaned GNexus

I don't understand what people expect??? They want to have an awesome huge screen, fast processor, 4G speeds, want to run apps like crazy and then have Google Now constantly updating and expect the battery to last all day?? People just need to be realistic!

I'm completely stock and my battery is almost the same. Think it's a bit early to tell yet, we've all been playing more with the new rom
Sent from my Galaxy Nexus using xda premium

I am under the impression that the drain is slightly higher than on ICS, I am now 5,5 hours after charging, with 88% left (and a screen time of 18mins). On ICS I would be around 90 to 93% (with the 2000mAh battery). But nothing really to worry about.
Having said that, I did have lightflow installed and it did show in the wakelock screen, so I uninstalled that to see if the next charge gives me even better endurance.

[Q] Odd N5110 Battery Drain :(

Hi all
My N5110 has an odd battery drain.
Normal Internet browsing with the odd YouTube vid can see the battery drop from full to 1% in as little as 2.5hrs.
The strange thing is that it will then run at 1% for a few hours before dying (with the screen dimmed due to auto power saver).
I am running civz rooted rom but have tried several different stock and custom roms, all of which have the same issue.
Anyone have any ideas?
Thanks in advance
Sent from my GT-I9505 using Tapatalk

Anyone?
Sent from my GT-I9505 using Tapatalk

4ndynic said:
Anyone?
Sent from my GT-I9505 using Tapatalk
Click to expand...
Click to collapse
what are your kernel settings and civ's rom version you have?...
internet dains battery very fast... so keep in mind playing hd videos using internet will drain battery very fast....

Thanks for the reply mate
Doesnt explain why it's running for hours at 1% tho, guessing the battery stats have screwed up somewhere along the line but then surely they are over written by a rom flash!?
Sent from my GT-I9505 using Tapatalk

Current version
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4ndynic said:
Current version
Sent from my GT-I9505 using Tapatalk
Click to expand...
Click to collapse
ok, and N5110 kernel and rom settings?

Lol, try this one!
Sent from my GT-N5110 using Tapatalk

4ndynic said:
Lol, try this one!
Sent from my GT-N5110 using Tapatalk
Click to expand...
Click to collapse
ok,
can you explain with details how do you use your note 8 (from 100% to 1% battery), i mean what applications you use, in youtube (hd content, 1 hour length or 2, etc)
besides that, how do you install the rom?... FULL wipe (erasing internal SD card from recovery and clear cache)??

Hello.
I have one N5110 stock. After upgrading from 4.1.2 to 4.2.2, I have the same exact behaviour... very fast battery drain. On standby the Note8 uses very little battery. With the screen on browsing internet it does not get to 2 hours screen time without going below 5% and entering power save mode. Then I can still browse internet for more than a hour with the dimmed screen.... very odd. Seems like it's not callibrated or something...
If I start playing games like RealRacing3 I can depleat the hole battery in less than 30min. With the 4.1.2 version it used to last more than 2 hours playing the same game.
I'm thinking on returning the device under warranty.

diogoquintao said:
Hello.
I have one N5110 stock. After upgrading from 4.1.2 to 4.2.2, I have the same exact behaviour... very fast battery drain. On standby the Note8 uses very little battery. With the screen on browsing internet it does not get to 2 hours screen time without going below 5% and entering power save mode. Then I can still browse internet for more than a hour with the dimmed screen.... very odd. Seems like it's not callibrated or something...
If I start playing games like RealRacing3 I can depleat the hole battery in less than 30min. With the 4.1.2 version it used to last more than 2 hours playing the same game.
I'm thinking on returning the device under warranty.
Click to expand...
Click to collapse
The biggest issue that causes battery drain is Google Music Player... Once you go from 4.1.2 to 4.2.2. You can disable it in application settings.
ANother issue is DVFS... If rooted, you can run xposed framework and Wanam Xposed.

Opened my note 8 and disconnected the battery for 1 hour... the battery shower 1% when i did it. After reassembling the battery and back cover battery indicated 73%. Now discharging speed is back to normal...
Enviado do meu GT-N5110 através de Tapatalk

diogoquintao said:
Opened my note 8 and disconnected the battery for 1 hour... the battery shower 1% when i did it. After reassembling the battery and back cover battery indicated 73%. Now discharging speed is back to normal...
Enviado do meu GT-N5110 através de Tapatalk
Click to expand...
Click to collapse
Disabling DVFS will do the same, but will require rooting, which is safer than opening and disconnecting things.

Can you please explain what is dvfs? How do I do that?
Thanks
Sent from my HIGHWAY using Tapatalk

diogoquintao said:
Can you please explain what is dvfs? How do I do that?
Thanks
Sent from my HIGHWAY using Tapatalk
Click to expand...
Click to collapse
Well, one will need to root their device... I recommend saferoot on 4.2.2 and earlier, or CF Auto Root for 4.4.2.
Once you root, you can use xposed framework and install either Wanam DVFS for a fast and easy option or get the Wanam Xposed module and enjoy even more options.
DVFS is Dynamic Voltage File System... Samsung developed it, and it seems to be a problem with battery charge rate. There are two issues one that is how Android reads battery data. For example, if you plug in your device to charge it will estimate from polled data. So it is not as accurate as a laptop or cell phone. Becuase is uses a data base, anything can cause an issue with how the battery is being charged. With DVFS active in Touchwiz, it causes the battery polling to go out of cycle and looses perspective when charging and discharging.
I have tested and found that if DVFS is left enabled, you can get a very slow charge or a very fast drain according to how the battery polling database is out of sync.
If Android used hardware polling from the battery's smart interface, DVFS would not be an issue, and would work as designed. Since there are a few apps that kill the database and makes it start from scratch, you may find the problem reoccurring and must keep the app installed. I rather just disable DVFS and not deal with such battery optimizer apps that really don't optimize.

diogoquintao said:
Hello.
I have one N5110 stock. After upgrading from 4.1.2 to 4.2.2, I have the same exact behaviour... very fast battery drain. On standby the Note8 uses very little battery. With the screen on browsing internet it does not get to 2 hours screen time without going below 5% and entering power save mode. Then I can still browse internet for more than a hour with the dimmed screen.... very odd. Seems like it's not callibrated or something...
If I start playing games like RealRacing3 I can depleat the hole battery in less than 30min. With the 4.1.2 version it used to last more than 2 hours playing the same game.
I'm thinking on returning the device under warranty.
Click to expand...
Click to collapse
this is the exact issue i am having. just in the process of sending it back to samsung though, as its only 6 months old...
is battery drain still back to normal after you removed the battery?

It's good until now after I unplugged the battery.
Sent from my HIGHWAY using Tapatalk

[Q] 5.0 extreme battery usage

I loaded the 5.0 factory image last week and my battery usage has been awful since. I am 100% stock. No root or mods at all.
Yesterday I took my fully charged N7 off the charger about noon. I hardly used it. Sent 3 emails and checked football scores a few times. 10 minutes use max. 95% of the time it was sitting with the screen off. By midnight it was almost dead. I have wifi off during sleep. This morning it's been off the charger for 2 hours and is down 20%. I have not used it at all other than to check the battery. Previously it would last 2-3 days between charges with light use. Not seeing anything standing out as using excessive amount of battery. Android System uses the most at 17%
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I know there was a wifi bug but I thought that was fixed prior to the release of the factory images. Strange thing is I have run all the L previews and currently a pre image release of a 5.0 AOSP rom on my N5 and I've had no issues at all.
Anyone else seeing this or have any suggestions?

I been looking for a thread like this. Coming from 4.4.4 all stock battery was great, I don't have any statistics but moving from 4.4.4 to 5.0 still stock no-root, the device gets really warm and battery drop isn't very comforting.
I hear the nexus 9 also gets very warm, must be a 5.0 bug.

5.0 with NRT Sideload update and no issue with battery nor wifi. I loose max 1% by hour in the night ! As I have a little use I can keep it during 3 days without charge !

hokuto34 said:
5.0 with NRT Sideload update and no issue with battery nor wifi. I loose max 1% by hour in the night ! As I have a little use I can keep it during 3 days without charge !
Click to expand...
Click to collapse
my friend 1% per hour is much
with wifi and sync all the time during night i get 0.1%/h
i confirm drain battery on 5.0 for nexus 7 unfortunatelly!

Same here. Pretty bad battery life with 5.0. Battery would not last more than a day. On 4.4.4 I can easily go 2 days.
Sent from my Nexus 7 using Tapatalk

61% left 1 day 11h

I was on XDABBED's rooted stock-image, the battery usage was as bad as the OP's situation.
Since then, I moved to XDABBED's latest AOSP release ... the battery usage has been GREAT.

Also on stock and I can confirm that the battery is worse.
Previously on stock 4.4.4 I had calculated that 10% battery can get me through one day or one hour SOT.
After flashing factory image I can confirm that the most I can manage is 4-5 hours SOT in two days.
That's 30-40% higher battery consumption.

why don't you download an App Ops tool from google play store
and deactivate any location service.
Currently, there are not that many app ops tool that can support lollipop.
One from Lars Team works on Lollipop, so I am using that.
For me, google play service was using extensive amount of power for location search,
and after I turned down location search capability of google play service, the power drainage stopped.

Same Issue
Yes I am also facing the same problem. Terrible battery time. I charged my Tablet yesterday and pulled it out at 100% at 10pm. I put it on Airplane mode and went to sleep. When I woke up today at 6am the battery was showing 70%. It ate 30% at night doing what? I am very disappointed. On Kitkat 4.4.4 I never had such terrible battery performance. I am going to try it out today again and ensure that all apps are closed. Lets see what the performance will be like. Will update tomorrow.

I loaded Battery Batter Stats last night and left unplugged overnight so that I could check for partial wake-locks this morning. Unfortunately the battery was completely dead when I woke up. I put it on the charger when I left for work so I can check tonight.

nike984 said:
One from Lars Team works on Lollipop, so I am using that.
Click to expand...
Click to collapse
i followed your advice i disabled the location query and the right to keep the device awake and will report later tha night or tomorrow :good:

I can confirm that the tablet gets a little bit warmer with Android L and that was just Initial Setup, idk yet about battery I will fully charge tonight and test tomorrow.

nike984 said:
why don't you download an App Ops tool from google play store
and deactivate any location service.
Currently, there are not that many app ops tool that can support lollipop.
One from Lars Team works on Lollipop, so I am using that.
For me, google play service was using extensive amount of power for location search,
and after I turned down location search capability of google play service, the power drainage stopped.
Click to expand...
Click to collapse
This was a good advice I must admit [emoji4]
I installed App Ops and noticed huge Location usage from Android System. After I disabled this the battery drain is a lot smaller. Not as good ad KK but very tolerable.
Also noticed that my video player, Archos, is using more power on Lollipop that before. I use it same or less than on KK but it drains the battery a lot more and is always at the top in battery usage.