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

3% battery drain every 5 min. normal?

I know this is another battery topic, but specifically I am getting a drain of about 3% every 5 minutes while browsing the web on data. I am getting this drain at both 50% and 20% brightness. This drain seems high to me. I mean, during that 5 minutes, I am mostly just browsing one long page, so there is not much data activity going on in any case. Bluetooth, gps, and wifi are all off. I would like to hear other folks' experience.
Edit: my old hd2 with a small 1250 battery is running android and is only losing 1% every five minutes while doing the same thing!!

Possibly. Screen white or black factor. Type and speed of connection. Background processes. Battery temp. But that is a little higher.
Sent from my Galaxy Nexus using xda premium

If your on LTE that's your problem. Try to use wifi as much as possible.
Sent from my Galaxy Nexus using XDA App

Same for me. I'm not on LTE, I'm on 3g in Sweden. Just tried it myself and it drained 3% in 5 min of surfing with the stock browser.
And 2% more while writing this reply, that took 2 minutes.
Sent from my Galaxy Nexus using Tapatalk

The battery seems to drain ridiculously fast when you're using the device.

X-Ter said:
The battery seems to drain ridiculously fast when you're using the device.
Click to expand...
Click to collapse
Well the solution here is obvious

jauffRINDIR said:
Well the solution here is obvious
Click to expand...
Click to collapse
I went out to do some Boxing Day shopping in the morning and used the phone quite a lot. Came back with 48% battery about 2 hours ago, haven't used the phone since and it still has 48% battery lol.

X-Ter said:
The battery seems to drain ridiculously fast when you're using the device.
Click to expand...
Click to collapse
Your not supposed to use it, just keep it in your pocket.

Its probably down to bad battery calibration. This is a lot less to do with 'conditioning' the battery - which you don't need on Lithium based batteries - and more to do with Android understanding what level is 100%, 99%, 98% 50% and 0% etc.
Until you've been through a few real cycles from full to empty, the % is pretty inaccurate. Most people recharge at around 20 to 40% just because a charger is near by or its bed time, and that usually results in the levels being even more inaccurate at the higher end.
For example my battery will drop from 100% to 70% very quickly, the next 30% even slower and the last 40% seems to last forever :/
If you're rooted wipe your battery stats, do a full charge and let it drain to 0. The type of usage probably isn't that important, so play a game for 4 hours if you want . If you're not rooted, doing the same will still help make it more accurate, but of course previous usage will mess with those results.
---------- Post added at 04:05 PM ---------- Previous post was at 04:02 PM ----------
EDIT: In fact try this.. turn off the screen timeout temporarily, and leave it on the web page. Check the % every 5 minutes and keep a note of them. You should see that its not 3% over 5 minutes once you get past the first 10 to 20% of the battery.

Here is my overnight battery drain test. My phone was idle the whole time. Only on 2G mode and no wifi, no gps and no bluetooth.
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Try uninstalling Facebook for Android app and also Sign into Latitude, select Do Not Report My Location, and then sign out of Latitude.

Smokeey said:
If your on LTE that's your problem. Try to use wifi as much as possible.
Sent from my Galaxy Nexus using XDA App
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Click to collapse
Should have mentioned that its a GSM model.
Sent from my Galaxy Nexus using xda premium

Silly GSM users commenting on LTE device. tsk tsk... they just don't understand the immense power + battery drain of LTE.
LTE drains battery much much faster then GSM/3G. That's how it is on ALL LTE phones & the fact that the GN also has the biggest screen helps rape the battery. Sadly, what you are experiencing is normal for LTE. Im on my 2nd Nexus & calibrated both of the ones i had. Same exact issue as you and regardless of what apps/settings you adjust/disable, it's not going to help with battery much at all unless you turn off "mobile data"/LTE(or go into airplane mode).
When i have LTE on and am actually using the phone it seems like it's going through 1% battery every 1-2 minutes.... yet if i turn "mobile data" off it goes through 1% every 8 - 10 minutes instead. oh and all you weirdo "look how long my battery lasted NOT using my phone!" freaks... if i activate "airplane mode" & turn off the screen the battery will last 2 days. wee!!.. (why even have a phone lol)

voxigenboy said:
Silly GSM users commenting on LTE device. tsk tsk... they just don't understand the immense power + battery drain of LTE.
LTE drains battery much much faster then GSM/3G. That's how it is on ALL LTE phones & the fact that the GN also has the biggest screen helps rape the battery. Sadly, what you are experiencing is normal for LTE. Im on my 2nd Nexus & calibrated both of the ones i had. Same exact issue as you and regardless of what apps/settings you adjust/disable, it's not going to help with battery much at all unless you turn off "mobile data"/LTE(or go into airplane mode).
When i have LTE on and am actually using the phone it seems like it's going through 1% battery every 1-2 minutes.... yet if i turn "mobile data" off it goes through 1% every 8 - 10 minutes instead. oh and all you weirdo "look how long my battery lasted NOT using my phone!" freaks... if i activate "airplane mode" & turn off the screen the battery will last 2 days. wee!!.. (why even have a phone lol)
Click to expand...
Click to collapse
I had both the LTE and GSM models. While both are terrible on battery, they lasted about the same. I did have the extended battery in the LTE, so I take that in consideration when saying they lasted about the same. No huge difference on the LTE.

Post Battery Life Here

Just curious to see what everyones battery usage is like. I'll post mine tonight after my battery drains down
Sent from my SAMSUNG-SGH-I747 using xda premium

jdbeitz said:
Just curious to see what everyones battery usage is like. I'll post mine tonight after my battery drains down
Sent from my SAMSUNG-SGH-I747 using xda premium
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Click to collapse
I charged it up during the day yesterday, but then hammered it syncing my emails, sms messages and other things.
So, last night was my first real charge. I took it off the charger at 6am this morning, and right now, at just a few minutes less than 5 hours, I'm at 83% with 70% use being cell standby.
I'm sticking with HSPA+ today, because I know that will drain the battery more than WiFi (at least that was the case on my Atrix) and I'm trying to get a feel for the battery life when away from WiFi.
Now, full disclosure, my phone has 6 email accounts setup for push. An Exchange account, two Gmail accounts and three Imap idle accounts using k9 mail. Still, I would say it's burning battery at a little higher rate than my Atrix with those same six push email accounts.

5 hours and down to 40%.
:-(

I'm seeing a significant increase in battery life whith the s3 over the s2
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I'm a bit of a light user, but a little heavier than average given new phone.

7.5 hrs @ 57%.
I'll post screens when I can.

5 Hours, 45%, screen on 2 hr, 12 min.
Interesting thing: I have a Pandora Widget on my screen, have not used it at all, and 13% of my power, and show son for 22 min.

9.5 hrs @ 29%.
I am using the default juicedefender profile.

Cell standby hogs the battery more than other phones like US One X with same SoC. I think kernel devs can work on this since this is not normal.

To get a good idea on battery life, everyone needs to show their screen on time as it should be the biggest drain.
Sent from my HTC One X using Tapatalk 2

This is on power save mode.
Sent from my SAMSUNG-SGH-I747 using xda premium

^^ I had power saving off for the first 3 hours of the day, and screen was set to 1/4 brightness. I changed screen to auto brightness, disabled wifi network scanning/notification, turned on power saving mode (all options), and it's been like that since about 3 hours into the day. I've done some driving with Slacker Radio streaming via bluetooth to my Jeep.
Seems like cellular standby eats juice. I am in an LTE area.

is the a way to turn off LTE?

This is mine so far, don't really run any battery saving appsetc. Cell standby is a bit too much.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Heavy usage today including a 30 minute trip in the car using gps and lte im at 42% right now
Sent from my SAMSUNG-SGH-I747 using XDA

420SYN said:
is the a way to turn off LTE?
Click to expand...
Click to collapse
this.
op said he just ran on hspa+ so there must be a simple way to do it

jdhommert said:
this.
op said he just ran on hspa+ so there must be a simple way to do it
Click to expand...
Click to collapse
I haven't seen a way to switch. The person in question is probably in a market without LTE like I am and is stuck on HSPA+

so battery life is wayy better on the exynos...
Sent from my SAMSUNG-SGH-I717 using xda premium

I went to work yesterday at 4:30pm and showed people my phone all day as well as had the screen on the entire time for my lunch. Got home at 11:45pm and my battery was at 91%. This is on LTE the entire time also. My Nexus was usually at 60-70% by the time I got home.

Zacisblack said:
I went to work yesterday at 4:30pm and showed people my phone all day as well as had the screen on the entire time for my lunch. Got home at 11:45pm and my battery was at 91%. This is on LTE the entire time also. My Nexus was usually at 60-70% by the time I got home.
Click to expand...
Click to collapse
are you rooted? cause 91% left and you had it on for about 7 hours??? that's damn good. where you running any apps?

[Q] Battery life for Note 2

This is a question for the new owners of the galaxy note 2. Have you noted the "screen-on" time for battery to go from fully charged to drop dead? One of the biggest problem with the Super AMOLED devices is the (relatively) abysmal battery life when web browsing as they do quite well when playing video. Let's say if you were to primarily browse the web on the device how much screen-on time would you get?

im on my 3rd day now without a charge with heavy use.
Sent from my GT-N7100 using Tapatalk 2

eRode said:
im on my 3rd day now without a charge with heavy use.
Sent from my GT-N7100 using Tapatalk 2
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ummmm - wow...
Can you post a screenshot showing your battery life and screen-on time?

Yes please... that seems insanely good. Pics or it didn't happen!!

eRode said:
im on my 3rd day now without a charge with heavy use.
Sent from my GT-N7100 using Tapatalk 2
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Sorry! I don't believe Note 2 can do like that. How about your heavy meaning?

On my original Note1, I got 4 hours max of screen-on time while browsing/facebooking.
Hopefully the note2 will be an improvement over that!

I got my Note 2 today, brand new and box-fresh. At 09:30 this morning I fired it up and it had 55% battery, so I logged into my Google account, did what you do with a new Android smartphone, downloaded a bunch of Apps, really put it under some heavy load, made a few calls, SMS, plenty of multi-tasking etc. At 15:30 it was showing 6% battery life including 2h50m of screen time.
For a fresh battery and heavy use, I think that's pretty good going.

My stats at this moment:
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And this one from yesterday:
Brightness 60% and power save mode (both)
Sent from my GT-N7100 using xda app-developers app

So about 6 hours of screen on time per full charge. Not bad, actually, its about a 50% improvement over the 4 hours of the note1.
I might still consider investing in an extra battery for those long days...

Moved To Q&A​
Please post questions in the Q&A section.​

thats odd as phone arena tried a battery test and found they would get around 9 hours continous video playback at full brightness and they say with half brightness they would come close to razor maxx at 14 hours screen time?
but still ill wait till others have tested it properly
http://www.phonearena.com/reviews/Samsung-Galaxy-Note-II-vs-Galaxy-Note_id3136/page/4

Video playback doesn't consume much battery on AMOLEDs, web browsing is more battery-consuming due to white backgrounds. Also, phone Arena said clearly that the phone was on airplane mode.
Sent from my GT-N7100 using xda app-developers app

very good battery life... for almost 2 days (I used S3, S2 before and this is a very good phone)

The mains adaptor that comes as standard with the Note II has a 5 Volt 2 Amp output that should be good at charging the battery as many existing power supplies are 1 Amp or less.
If you plan on using a car adaptor, don't buy a cheap low current one - most are only 500mAh or 750mAh.

looks like battery looking good so far from you guys..i say give it a week of cycles. still needs braking in...does the back get really warm when charging? is charge time fast?

After few more cycles the battery life is just CRAZY
And I wasn't even using battery-saver mode !
Sent from my GT-N7100 using xda app-developers app

Just found that:
Set to playing a video file at full screen, with Wi-Fi and 3G switched off (this is out standard test for tablet battery life) and screen brightness set to 50 per cent, the Samsung Galaxy Note 2 lasted for just under 12 hours.
Click to expand...
Click to collapse
Source: www.trustedreviews.com

Here is my Note II battery usage.
First day
Out of box without charging at all. Used it from around 49% to 3% for around 5 hours+ Screenshot attached.
View attachment 1371758 View attachment 1371759
Second day
The night before charged from 3% to 100% with my Note II power on for around 9 hours. Then unplugged and heavy using from 100% to 10%, it stayed more than 14 hours. I am saying this is pretty good juice. Screenshot attached.
View attachment 1371760 View attachment 1371761

How long are you guys putting this on the charger? Normally put my phone on charge when I go to bed and when I wake up it is fully charged. This phone was on the charger for 7.5 hours and went from 7%-63%. WTH????

Yesterday I charged it from 10% to 100% in about 2h30

Standby drain

When you sleep, does your phone sleep, or does it stay up all night and crunch 1s and 0s? Rate this thread to express how you deem the speed at which the Samsung Galaxy S7's battery drains under standby conditions. A higher rating indicates that when the phone is not in use, the battery drains minimally.
Then, drop a comment if you have anything to add!

hi there. got my s7 few days ago and it sleeps like a baby hehe 1% lost in 6 hrs
Sent from my SM-G930F using Tapatalk

I lost 10% of battery the past two nights. I have the always on feature turned on tho.

The mine 0,5% a hour
Inviato dal mio SM-G930F utilizzando Tapatalk

I typically lose about 4-5% overnight. Not bad, but not as good as a Nexus

I have a massive batterydrain in standby when I am connected to WiFi. When I'm on mobile data I have no batterydrain at all in standby
I don't have a clue why it is like this

I lose 18% over 8 hours. Maybe I'll try turning wifi off tonight. That said, battery life overall seems really good. No problems whatsoever getting through a full day on one charge.

fredriks said:
I have a massive batterydrain in standby when I am connected to WiFi. When I'm on mobile data I have no batterydrain at all in standby
I don't have a clue why it is like this
Click to expand...
Click to collapse
Go to WiFi > more > keep WiFi on during sleep > off
More than likely your WiFi is causing the drain by the always scanning feature turned on

captobie said:
I lose 18% over 8 hours. Maybe I'll try turning wifi off tonight. That said, battery life overall seems really good. No problems whatsoever getting through a full day on one charge.
Click to expand...
Click to collapse
Yes, do try that. It would be interesting for me too to know.
chungdae said:
Go to WiFi > more > keep WiFi on during sleep > off
More than likely your WiFi is causing the drain by the always scanning feature turned on
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Click to collapse
Have that setting now but should not have to. On my S6 I have it allways on and there is no batterydrain problem.

with heavy use, 2 days battery life without charging. and also its charging is pretty fast too

I loose 1% over a 7h night on plane mode.
SM-G930FD

I bearly loose 1% per night (wifi on/always on display). Even in heavy use, the battery doesn't give up that easy...

shekinah said:
I bearly loose 1% per night (wifi on/always on display). Even in heavy use, the battery doesn't give up that easy...
Click to expand...
Click to collapse
What tweaks/optimizations do you have? Exynos version or SD820?
I have the SD820 with package disabler pro and greenify and I lose about 5% overnight...
Sent from my SM-G930V using XDA-Developers mobile app

gleggie said:
What tweaks/optimizations do you have? Exynos version or SD820?
I have the SD820 with package disabler pro and greenify and I lose about 5% overnight...
Click to expand...
Click to collapse
Hey man,
I have the exynos version. Still on stock, i just used "package disabler pro" - as you do - to get rid of all the bloatwares and apps i don't use.
Oh, and i don't know if that's relevant, but i disabled the fast charge, in order not to preserve the - non switchable - battery, it still charges quite fast.
I've checked three times now, i was never below 99% when i woke up.
Hope it helps.

shekinah said:
Hey man,
I have the exynos version. Still on stock, i just used "package disabler pro" - as you do - to get rid of all the bloatwares and apps i don't use.
Oh, and i don't know if that's relevant, but i disabled the fast charge, in order not to preserve the - non switchable - battery, it still charges quite fast.
I've checked three times now, i was never below 99% when i woke up.
Hope it helps.
Click to expand...
Click to collapse
only lost 1% with Always on Display? That doesn't sound right
I lose about 2-3% over night without Always on Display

vhc said:
only lost 1% with Always on Display? That doesn't sound right
Click to expand...
Click to collapse
Yet this is. I just turn the phone back (with the screen hidden) so that the "always on" doesn't turn on.

I am having massive battery drain
My phone drops 20% in 2 hours on standby and I'm at my wits end trying to figure out why android os is taking 500mb of data a day

20% Over night absolutely not normal!
Have to recharge phone twice a day.
I am on stock and cannot apply root (this is company phone).
When I had Nexus 5, battery drain was not so horrible.

Here is a picture of my battery drain
From start I have WiFi on and then I turn WiFi off and the battery drain stops
Can't understand why WiFi is draining my battery like this ?
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Anyone wanna explain wtf is going on with this, I don't have any backing up turned on. No syncing no diagnostics uploading. No Google photo no Google Drive, all of that disabled with tons of apps disabled with package pro disabler
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