yashsingh1/xdaforums huggingface dataset:
[Galaxy Note GT-N7000 General] p107r0:
usually I'm very close to my router, so I choose the lowest one (4dB), the thing is that it seems that the battery current is lower (previously up to 900mA, now closer to 500mA), but when checking with the "iwmultiucall iwconfig wlan0" command in terminal emulator I see the same reading "Tx-Power=398dBm", no matter what setting I chose in the app.
[Galaxy Note GT-N7000 General] ahalford:
Already found the soultion.​

Flashed stock rom again through mobile odin with everoot option only. Warning - whole rom must be flashed, not stock kernel only, to promise right su binaries into system later

Then, installing root & su from here - CWM, SU, BusyBox.

Cleaned cache/dalvick, reboot.

30 minut after reboot - no wi-fi wakelocks. Continue testing...

Credits for guiding me to right root without affecting the kernel goes to pro100gamer from 4PDA.ru and this wonderful guy

Update - 1 hour, no single wakelock.
[Galaxy Note GT-N7000 General] ahalford:
Update - 2 hours, no wakelocks. Seems like it worked.
[Galaxy Note GT-N7000 General] sedohunta:
I am a Note-newbie, as I only got it a few days ago, and I would like to ask you if 5 hours of screen-on time (90 percent of which is wifi websurfing) is acceptable for this device on ICS? It went from 100% battery to switching off with exactly 5 hours of screen-on time. Without wifi, with phone standby, the battery life seems to be several days as it only loses 1 or 2% per night.

Otherwise ICS seems to be silky smooth, not a single FC or any other problems.
[Galaxy Note GT-N7000 General] ahalford:
Seems perfectly in order.
[Galaxy Note GT-N7000 General] sedohunta:
So this means that I could not expect much longer screen-on time on GB either, right?
[Galaxy Note GT-N7000 General] ahalford:
No, I thnk not. Average on GB is ~4hrs of active screen usage. So you're on right track:)
[Galaxy Note GT-N7000 General] sedohunta:
Ok. Thanks again!
[Galaxy Note GT-N7000 General] Twistedchild420:
Not looking too great...was on Alba. Now on Criskelo
[Galaxy Note GT-N7000 General] Twistedchild420:
Since uploading that pic and posting it I'm down to 48% lol.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
Flashed at 100% and calibrated?
[Galaxy Note GT-N7000 General] tdodd:
OK - just discovered the source of one of my problems of runaway CPU, high temps and no sleep. I've been starting the device while still on charge. To me this seems an entirely reasonable thing to do, but it seems there is a major bug where the phone can go nuts if you boot the phone while still on the charger. I'm sure I did this while on GB without any drama, but on ICS I've now spotted the pattern re-occur at least three times. Once was when attached to my laptop and I thought Kies was the problem, but it's also happened twice with the AC charger.

I don't know if this is common knowledge, but worth sharing, I think.
[Galaxy Note GT-N7000 General] ngocdao:
That's not a problem

stop micro-managing all your services thinking its gonna give you a significant boost in battery time. In contrary you're gonna end up disabling certain crucial functions on your phone
[Galaxy Note GT-N7000 General] BBFreak:
I am having the same issue with battery drain. I'm trying a few things to see if I can gain but I think my culprit may also be the wifi not allowing it to go to sleep.
[Galaxy Note GT-N7000 General] ahalford:
Ok, I have some kind of custom solution for wi-fi sleep.

This one - Green power. It can override system sleeping policy, and manually configure each component by schedule - wi-fi, mobile-data, synch, bluetooth. Spend some money for premium version, great one (I'm not the dev:D) - it has day and night modes separately.
[Galaxy Note GT-N7000 General] crizolli:
I'm getting incredibly better than GB battery on ICS.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
Same here
[Galaxy Note GT-N7000 General] dzontra11:
4.5 hourse of screen on,,same like on GB.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
On my day off on thursday im going to flash the latest stock GB rom at 100% install no apps except for my comic book reader and leave it open on the first page so the screen doesnt shut down on auto brightness and take a screen shot at 5% of time on battery with screen on time then i'll charge to 100% and flash stock ICS and repeat the test.

Make for some interesting results..

Who fancies a little friendly bet and see who thinks which will last longest?
[Galaxy Note GT-N7000 General] tdodd:
I'm not convinced that displaying a static image for hours on end will fairly test the strengths and weaknesses of the OS. Mostly it will be a test of which OS drives the screen brighter. What you really need is some proper I/O to the screen, some real processing, like rendering graphics and maybe a healthy dose of data transmission. I would think that if you don't have a proper test suite handy then at the very least streaming a movie or YouTube playlist would be more representative of actual use. Otherwise you'll have the CPU crawling along at 200MHz, twiddling its thumbs and the backlight will be the only thing consuming juice in significant amounts.
[Galaxy Note GT-N7000 General] richlum:
For me the screen on time isn't the problem. It seems about the same as GB.

It's how quickly the battery drains in standby mode when the screen is off that is a lot worse than GB.

Mine is often not going into deep sleep when the screen is off.
[Galaxy Note GT-N7000 General] yyl:
This solution worked for me. Thanks for sharing.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
So possibly have allshare playing a video playlist from my pc?
[Galaxy Note GT-N7000 General] tdodd:
I imagine that would be a better test. No harm in giving it a go. :)
[Galaxy Note GT-N7000 General] Vrayhem:
When I first flashed LPY rom with the CF root kernel using Mobile Odin, battery life was horrible. Then I unfroze all apps on TB pro and reflashed the rom and kernel. After that I used BBS to see where it leaks and spotted the audio out wakelock so followed the airplane mode trick and removed all GO apps except from GO sms pro, power master and task manager. Installed Apex launcher, froze around 20 apps and uninstalled around 30 apps. After 3 recharges from around 20% to full, clearing Dalvic cache and 2 hard resets the phone battery life is best I ever had. At 83% after 6 hours with 45 mins screen on 25 mins calls, full wifi on, bluetooth on for 35 mins.
[Galaxy Note GT-N7000 General] tdodd:
Well my battery performance is still all over the map. Yesterday I thought I'd finally got things sorted out, with the battery holding charge well for several hours. Then I had a major dabbling session and the charge dropped from 100% to 75% while fiddling. No problem there, but I wanted to get the phone back up to 100% before going to bed, so I could monitor the discharge overnight while asleep. To recharge the phone I decided to connect it to my laptop and fire up Kies, just because you never know what might be out there for an update. There was nothing available so I terminated Kies and left the phone attached to the laptop to continue charging. At this point the charge had increased to 77% so all looked to be on track.

A while later I wanted to see how the phone was doing, in terms of charging, so I turned it on. To my horror not only was it hot at the back, but the charge was down to 70%. This FRACKING thing! WTF is going on? I really have no idea, but I wasn't putting up with that BS so I disconnected the phone from the laptop, rebooted it and stuck it on the AC adapter until it reached 100% again. This time no heat. Off I went to bed with WiFi enabled all night and this morning I had this (see attached). Now that I'm very happy with, but WTF was going on when it was connected to my laptop? This thing is crazy...

There seem to be far too many random instances of runaway CPU causing massive battery drain and heat. I don't recall ever seeing anything like this under GB. I upgraded to ICS from stock unrooted GB using Kies and I have rooted using the temp CWM. That's it. I've not used any experimental ROMS at any time. But I can't trust the thing to not screw up when I'm not looking. As soon as it goes anywhere near a charger (or my laptop at least) I'm left wondering if it will end up fracked again by the experience. I really don't trust it to simply do what it is supposed to do.
[Galaxy Note GT-N7000 General] tdodd:
Just remembered - I had exactly the same experience when I performed the upgrade through Kies. The upgrade went smoothly and I left the phone connected to complete charging to 100%. It never got there. It was hot and discharging at an alarming rate. Maybe there is something screwed up between Kies and ICS, or ICS and USB drivers or something.

It seems an odd coincidence.
[Galaxy Note GT-N7000 General] siuming720:
What is the rom and kernel you using ? I think kernel is the battery drain reason
[Galaxy Note GT-N7000 General] kurogane_s:
Hi all, I'd just like to share my findings regarding to battery life.

I managed to get my battery life back to GB usage levels (roughly) by doing the following three tweaks:

1. Use LB2 modem

2. Uninstalled com.samsung.map (MessageNotificationService)

3. Disabled fast dormancy (in doubt, but no harm it seems!)

After that, I noticed a big drop in the l2_hsic kernel wakelock and phone goes in to deep sleep a lot more now. Improved my battery life by 10% over the same usage pattern.

This may or may not work for everyone, but so far I suspect the com.samsung.map is constantly doing something with the network thus generating a lot of wakelocks.

Still can't get rid of the AudioOut_1 wakelocks though, but as of now, battery life is a little more acceptable to me.
[Galaxy Note GT-N7000 General] ahalford:
Be aware with a such tweaks. After flashing lb2 modem, Wi-Fi stopped to work. Depends on region, may be, but I warned you.
[Galaxy Note GT-N7000 General] tdodd:
If you're addressing me, and it's not clear whether you are, I'm using the stock LPY ROM which was downloaded and flashed using Kies.

I'm afraid I'm not sure what exactly the kernel is, but the only non stock modification I have is to have rooted using the procedure here - http://xdaforums.com/showthread.php?t=1647148. Now I have no idea whether doing that has changed the kernel, but that's my setup. I did notice when booting for the first time after rooting that a brief message appeared saying that "Android was updating" or words to that effect. I don't know if that's expected or not.

When I first upgraded with Kies I did not wipe anything, but I did see a number of FCs and funny behaviour, including the stock camera app going wobbly. So I performed a factory reset and wiped Dalvik too. The thing is, sometimes the battery behaves exactly as expected. At other times it's being drained at an alarming rate due to high CPU clock for no good reason, which of course is preventing deep sleep completely.
[Galaxy Note GT-N7000 General] gam3r20:
Oh thank u It works with me .. now I have a good battery life
[Galaxy Note GT-N7000 General] kurogane_s:
No problem with Wi-Fi here. Working fine.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
I have a strange problem.. I have 2 routers at him one for virgin media the other for bt..if I connect to bt its fine if I connect to virgin it keeps dropping and reconnecting every so often.. Only since ics.. Router related or ics?
[Galaxy Note GT-N7000 General] gaddy888:
I had the same l2_hsic wakelock a few days ago. Didn't have to do anything, but it's now gone. Not completely though. But the phone is going to deep sleep atleast between 70 -90% of the time now. No idea what caused it or fixed it. I did remove Apex and Nova Launcher. And also updated Samsung Apps when advised.
[Galaxy Note GT-N7000 General] alexdumitru:
You should try a different kernel. I tried multiple kernels and battery lifetime varies.
[Galaxy Note GT-N7000 General] kurogane_s:
Already disabled Samsung Apps since I never use it along with other Samsung bloatware.

l2_hsic seems to point to the modem waking up to send/receive packets based on what i found on xda, so my main suspicion lies in some rogue app doing it... com.samsung.map definitely seems to be the most suspicious one.
[Galaxy Note GT-N7000 General] incisivekeith:
For me the biggest battery drain comes from screen, which is expected but I wish this bottleneck could be improved. If this is improved it will definitely make me want to use my Note much more than I use it already.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
With any Android phone.. And by that I mean all of them.. The screen will always be the biggest battery drain, more so on the note for obvious reasons but on any device that can display an image the vdu will be the most power hungry. So unless you keep the phone in your pocket and never use it (why?) Then screen will remain top of the list
[Galaxy Note GT-N7000 General] jah:
I had massive battery drain and a hot Note. Solution was to stop the Android calendar app from trying to sync with Google calendar.
[Galaxy Note GT-N7000 General] Goodm7sn:
My experience on LPY battery while using the phone...

To be honest , my standby time is great (1%-2% per hour), deep sleep state most of the time when my screen is off , But .... while using the phone normally, it feels wrong, like its draining ALOT and FAST , the % just shooting down so fast that u wont even notice 1% every 2-3 minutes now!!!!!!! (see 1st screenshot) , cant remeber it was like this on GB......

I used the phone normally during my day:

-Wifi on all time.

-Autobrightness.

-Bluetooth audio in car for a a bit.

Please also note that:

- I installed German ICS thru mobileodin with ever root option checked (coming from GB ROM) .

- I fully wiped 2 days after installation,just to be on a clean ics build...

- Most Samsung bloatware is uninstalled (including Touchwiz) , im using apex pro.

To prove this issue , i started monitoring, using several apps... here are my results so far... (i was only browsing on xda app and an rss reader for about an hour as those screenshots were taken)

Is this normal ?? i cant remember GB eating as much juice as it does now while using my phone.

Any remarks,observations,graphic interpretations from some experts and constructive comments/suggestions are very welcome here :)

Cheers
[Galaxy Note GT-N7000 General] jb9217a:
My battery life is much worse with ICS, when I was using GB i would easily get a full days use and have 20 or so left over. Now I'm lucky if i hit 10 hours and have 20%. NOT HAPPY. What's worse is i would have my brightness at 100% with GB...now i have it at 70 and the battery life sucks.
[Galaxy Note GT-N7000 General] Twistedchild420:
I must say....for me....Kingdroid ICS is the most stable LPY ICS rom available at the moment.....battery life is not too shabby as well

---------- Post added at 05:32 PM ---------- Previous post was at 05:25 PM ----------

Also this
[Galaxy Note GT-N7000 General] tbong777:
Im running

FB updates at 3 hours

Latitude/Maps on

BT on

WiFi on

5 Pulse widgets updates 3 hours

AP updates 3 hours

GoEx Launcher

Screen 100%

Call record process running

Nothing frozen

Us FM Radio 4 hours a day

maybe 10 minutes calls

I get 10 hours before warning and I have no issue with that.

Same as GB for me. I carry an extra battery home and work and charge every night.

All in all I have never had a battery "issue" with any of my phones from the captivate to our SGS 2 and Note. That said if this were an iPhone of HOX and the battery could not be easily swapped out I would be looking to ration use and find short cuts and basically not use all the features available which is one of the reasons I dumped the iPhone after a two week try out. Found my self turing this and that off and not using the device because I could not charge it or had to carry a monstrosity pack to attach to it.

I am thankful Samsung has not gone the way of HTC and allows battery swaps so we can USE theses devices as much as we want without regard to battery life.
[Galaxy Note GT-N7000 General] nnick:
Same here. Plus the heating issue.
[Galaxy Note GT-N7000 General] xelir13:
I got to prolong my stock ics to almost 24hrs with a minimal usage.

Less than 1hr talk time

1hr browsing using mobile network

Its like not using the note at all.ICS really suck at battery life. Its maybe the best way to use ICS is to buy an eztra battery to prolong your usage specially if your always on the go.
[Galaxy Note GT-N7000 General] ahalford:
This thing and your screenshots prove, that your wi-fi is always on, even in deep sleep state. 1-2% per hour is terrible. It should be less.
[Galaxy Note GT-N7000 General] Goodm7sn:
Wif been like that the whole time even on gb (the 1-2% per hour on stabndby is ok too) . Cos I'm always on wifi (home and University). I never turn it off and I guess that's how it keeps me connected..

The problem is it sux alot while I'm using the device.... (1-2% per minute)
[Galaxy Note GT-N7000 General] ahalford:
Look for my posts in this thread...

This:

http://xdaforums.com/showpost.php?p=26041269&postcount=67

And this:

http://xdaforums.com/showpost.php?p=26088090&postcount=86

I configured wi-fi in Green Power to wake up every hour for 2 minutes, while in standby/screen-off together with autosync. Actually, I did with custom app what system has to do - wake up on demand only. Results are amazing - 2% battery drain per night in standby, for now - 40 hrs of battery life with 3 hours of screen time (surfing), still 20% of battery left.
[Galaxy Note GT-N7000 General] Kcake:
ICS>GB

The battery life is good and bad. I took off the charger by 10.15am i played Battlefield bad company 2 (a cpu intensive game) for about an hour, listening to music with data ON. By 1.30 i had about 68%. I turned data off and now the phone has entered deep sleep with a drain of 2-3% per hour.

GB was generally bad all the time regardless of data ON/OFF . ICS seems to save battery enormously with data OFF.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
Hmm.. Really strange all the bad battery life people are getting. I took my phone off charge at 6.20 am to head to work.. Had 2 hours 2 mins of screen on time by 8pm and still had 42% battery left. With moderate usage I can easily get 24 hours plus. I'm on stock non rooted ics
[Galaxy Note GT-N7000 General] Goodm7sn:
Thx for the suggestions mate, appreciated.

As I said. Standby been always like that (1-2% per hour) since froyo days on my desire hd.

Using third party apps to modify the behavior of my device isn't a solution for ics drain to be honest.

How am I supposed to get viber calls and whatsapp messages (heavily relied on apps) if I module my wifi/3g connection to on/off periodically? This defies the fact how the "smartphone" was made to be used and disturbes the user experience.

I know these apps do prolong battery life. But this isny the issue we r talking about here. The issue is ics battery life out of the box.. Which in my opinion is heavily smashed by poor coding from Samsung.
[Galaxy Note GT-N7000 General] tdodd:
The battery life under ICS seems absolutely fine UNLESS you get a rogue process hogging CPU and keeping the phone awake. Connecting to Kies via USB seems to cause this problem, repeatedly for me, and so does connecting USB memory via OTG. There have been other instances of odd things happening for me too, like the audioout_1 wakelock, the cause of which I cannot explain.

The problem with all this is that you don't know if/when your phone has got itself into one of these stupid states unless you keep checking. I should not have to be nursing the thing beyond the normal activities of disabling unnecessary functions such as WiFi when not needed. But to never be sure whether the phone will suddenly surprise you with a depleted battery when you expected it to be nearly full is not a comfortable user experience. We should not have to be hoop jumping for our phones to work "correctly". These issues should simply not exist.

Why does attaching to Kies via USB and leaving attached to charge screw things up?

Why does attaching and correctly unmounting OTG USB storage screw things up?

Why does the audioout_1 wakelock go crazy?

Why did having WiFi enabled permanently cause heavy drain just after the upgrade to ICS, and why does it no longer seem to be an issue? What fixed it?

What's with the "fix" many people have used by enabling airplane mode, rebooting and disabling airplane mode? Why is that necessary? Does it really work? Why does it work? How long does it work for?

I'm on a stock ROM, and always have been, so why are these problems materialising more than ever before? It's seems to me to all be something to do with Samsung code somewhere or other. All in all it's pretty tiresome to baby sit the wretched thing and not just get on with using it freely.
[Galaxy Note GT-N7000 General] frasch42:
I had the l2_hsic lock yesterday and the day before. Then tried the airplane-mode trick and that helped for about 24h. At some random point the l2_hsic came back and stayed for hours until I rebooted.

German stock ICS with cf-root.
[Galaxy Note GT-N7000 General] Braxos:
+ 1
[Galaxy Note GT-N7000 General] E90 Commie:
For me, the battery life with screen on has decreased with ICS. Approximately 1% every 1-2 minutes when using the S-Note or browsing the web.

It is important to note that the standby consumption is normal and comparable with GB. It is the "active screen consumption" that is higher.

I have also noticed the h2_lsic wakelock etc and my decision is to temporary return to GB. My impression is that the ICS LPY is not yet optimized, especially the kernel is a problem (the brick risk adds to that). When the custom kernels is released, the problem with high consumption when the screen is on will certainly be solved.

The high consumption has been experienced both on stock LPY and with RocketROM and I will now wait for enhanced versions and custom kernels before I return to ICS again (and a permanent solution for the brick problem).
[Galaxy Note GT-N7000 General] p107r0:
gave up today and went back to LC1, mostly due to completely uncontrollable battery consumption behavior - with all the unnecessary battery hogs disabled/turned off/uninstalled, it could play as nicely as 2mA usage in standby (just like I had under GB) and then go up to 130mA for no apparent reason,

even worse - I tested 6 hours of movie playback with minimum brightness and in plane mode: under GB usage was at ca. 280-320mA, on ICS similar with lots of wild jumps to 500-600mA, all in all I don't want to waste any more time on investigating processess, my stock GB was more stable, for now I'll wait for next stock ICS or - preferably - for a bit more mature CM9 revision
[Galaxy Note GT-N7000 General] Yucko:
No problems with battery consumption.

I use Profile Scheduler+ and whenever I'm on location (work, home, girlfriend) where there's WiFi it disables 3G (and tunes some other settings like volume and screen brightness and things like that). I'm now 38h+ on batterypower and still have 62% left. When I was using Toggle Settings before, ICS (and GB for that matter) consumed much more power during the day, but then again ... Toggle Settings couldn't disable 3G automaticaly for some strange reason so maybe that's the problem as I think I saw others mention in this thread.

Anyhow, very pleased so far :D

just to be clear:

phone goes into flightmode between 23:00 and 04:00 (I get up every day at 04:00 :( )

NoLed disables during the same period to prevent unseen notifications draining (even as little as they do) the battery.

from 04:00 until 23:00 WiFi is enabled during the whole day

When actually connected to a WiFi network, 3G automaticaly gets disabled

Android screen brightness set to 25%

Screen filter set to 50%
[Galaxy Note GT-N7000 General] Goodm7sn:
So yeah, I guess we l have the same issues...

Hopefully samsung will fix it soon
[Galaxy Note GT-N7000 General] p107r0:
Waiting for it to. For now I feel relief. ICS was nice, but somehow, don't know why, I feel better with GB after return, like being on familiar territory again.
[Galaxy Note GT-N7000 General] nuclearmonkeyuk:
I wouldn't say its that bad