Related
was today with:
2.6.35.4_SVS-925mV_BFS_AXI_720p_1113MHz_082710
and
update-cm-6.0.0-N1-signed.zip
with phone idling all day, battery went dead and phone shut off within 8 hours of full charge... wtf?!?
nexusonemeover said:
was today with:
2.6.35.4_SVS-925mV_BFS_AXI_720p_1113MHz_082710
and
update-cm-6.0.0-N1-signed.zip
with phone idling all day, battery went dead and phone shut off within 8 hours of full charge... wtf?!?
Click to expand...
Click to collapse
I've also noticed that with the latest CM's battery life is an issue for me. Ive got KoR roms to last almost two full days but cm is dead within 20 hours.
My battery life has changed as well and I now have to keep my travel charger and car charger with me at all times or suffer with a dead phone.
i had been running rc3 with the 8-19 kernel, and my battery life was similar to stock, but the combination of latest CM and wildmonks are just killing me... i think im going to go back to rc3 with the 8-19 kernel.
Check the active processes. You can't drain the battery in 8 hours unless you have a process stuck, using 100% CPU constantly (possibly Exchange?).
good thought, but im not an exchange user... i cant seem to isolate the issue. im going to do a full wipe and try stock to see if maybe i have a bad battery.
People with battery life issues should try Enom's ROM with a wildmonks kernel. I'm 18 hours in of a full charge and I'm at 76%. That's normal use with full screen brightness, wifi and gps, quite a few background updating apps, etc.
Over 50% of power usage should be the display under even moderate usage.
With wifi, push, and poll active, the battery drop per hour with the screen off should be less than 1%.
If it's higher than that, you need to find the rogue process or get rid of an automatic task killer.
Sent from my Nexus One using XDA App
ChronoReverse said:
Over 50% of power usage should be the display under even moderate usage.
With wifi, push, and poll active, the battery drop per hour with the screen off should be less than 1%.
If it's higher than that, you need to find the rogue process or get rid of an automatic task killer.
Sent from my Nexus One using XDA App
Click to expand...
Click to collapse
Display is most of my usage with over 50% every time. I have one app that auto updates in the background, Twitter, and thats every half hour. I do have 3g on but with wireless on most of the time. GPS, Autosync, and Auto-Brightness is on. I play one game twice a day, World War, once in the morning, once at night, but both times are usually on the charger.
Now that I think about it, Im a part of latitude but maps/latitude never consume battery according the about>battery.
Either way CM6 full charge starting at 4am, with light-moderate use, will be dead at like 5pm. I can go almost 2 days on a single charge of KoR rom. Enoms rom I have tried and lasts a full day +some...
nexusonemeover said:
was today with:
2.6.35.4_SVS-925mV_BFS_AXI_720p_1113MHz_082710
and
update-cm-6.0.0-N1-signed.zip
with phone idling all day, battery went dead and phone shut off within 8 hours of full charge... wtf?!?
Click to expand...
Click to collapse
I have the same issue and have had it since RC2. I can deal with it since I have the desktop dock at work, the car dock, and two wall chargers at home. The drain is pretty noticeable -- after about 30 minutes of the phone being off the charger and left alone with screen off, the battery charge is at 94% with "Display" using 65% of that. Wifi/BT/GPS off.
Like I said, it's not a big deal right now because I have chargers everywhere, but it's really annoying. I'm still searching for the fix, but if I can't find it, back to MCR for me.
I tried CM for 1 week and I must say the extra glitters is not worth the poor battery life., only lasted 1 day if used moderately. I just switched back to FRF91 Stock Rom today, lasts me 2days if used moderately. Longivity of the battery is another long term concern people should think about. I still miss my modded dialpad with big buttons, cool trackball colors and many more, CM is such a TEASE!
What kind of battery life are people getting with Pershoot's latest? It's undervolted, so it should do pretty well.
mythamp said:
I tried CM for 1 week and I must say the extra glitters is not worth the poor battery life., only lasted 1 day if used moderately. I just switched back to FRF91 Stock Rom today, lasts me 2days if used moderately. Longivity of the battery is another long term concern people should think about. I still miss my modded dialpad with big buttons, cool trackball colors and many more, CM is such a TEASE!
Click to expand...
Click to collapse
Tried Enom? I've seen zero difference in battery life, perhaps slightly better, since switching to it from stock Froyo on my N1.
In the battery use screen, what's draining the battery with the screen off? Let the phone drain like 10% with the screen off the entire time after unplugging.
several recent nighties and cm6.0.0 seem to have something broken.. Four hours of standby after full charge and the battery level already @ 83%.
cell standby 32%; idle 29%; display (wtf was turned off all the time) 28%.
Drains twice as fast compared to older CM roms..
The LEDs are also considered the Display by the battery meter.
Still, 17% in four hours is enormous. I guess I'll have to hold off on CM6 until they sort this out.
Dicks! 4% battery drain in one hour with almost no use, and that's after flashing pershoot's undervolted kernel. No way.
I'm going to try wildmonk's kernel now. :/
I'm still running 2.3.3 (Original firmware)
For those who ran 2.3.3 and are now running official 2.3.4...was battery life improved?
airwater9 said:
I'm still running 2.3.3 (Original firmware)
For those who ran 2.3.3 and are now running official 2.3.4...was battery life improved?
Click to expand...
Click to collapse
much better bud...but im on a custom rom and my battery life is even better
3d-6h-4d8h All the time.
Email check every 5 min, twitter check 1h. wifi always on. Phone calls and little other usage.
12 hours before stable normal use. Arround 10 now with 2.3.4.
My battery life got much much worse. No custom roms, everything stock, UK non branded phone. Before upgrade (from 2.3.3.) battery lasted about 12 hrs and still 20% left, after update to 2.3.4. removed from charger at 8 am in the morning and 100% charged, after 10 hrs phone at 7%, same type usage as before, actually even little less.
I am very dissapointed with the battery life after upgrade.
Well this was my first day on the new software, will see tomorrow...
The custom rom is better for you battery life.
Sent from my GT-I9100 using xda premium
2.3.5 is reported to be even better on battery life, have a look around and try a custom rom & kernel, you will notice a difference.
Sent from my GT-I9100 using Tapatalk
i am using 2.3.5 and i have the worst battery life
carlitos66 said:
My battery life got much much worse. No custom roms, everything stock, UK non branded phone. Before upgrade (from 2.3.3.) battery lasted about 12 hrs and still 20% left, after update to 2.3.4. removed from charger at 8 am in the morning and 100% charged, after 10 hrs phone at 7%, same type usage as before, actually even little less.
I am very dissapointed with the battery life after upgrade.
Well this was my first day on the new software, will see tomorrow...
Click to expand...
Click to collapse
I've seen the same battery life drop on my unbranded UK phone since kies update to 2.3.4. It barely makes it through the day now. Hoping this gets resolved soon, as it seems I've taken one step forward and two steps back.
pixate said:
I've seen the same battery life drop on my unbranded UK phone since kies update to 2.3.4. It barely makes it through the day now. Hoping this gets resolved soon, as it seems I've taken one step forward and two steps back.
Click to expand...
Click to collapse
I agree, battery life is actually worse with the official 2.3.4 update. With 2.3.3 I got around 1d, 12h, now I'm getting less 6-12h than before, with some synching, push email, calls/sms and light browsing. I mostly use stock apps, except the browser (I prefer Opera). I'm not even playing games or anything. Sammy, I'm dissapoint...
At least now the interface is smoother, but overall I'm not happy with the update. Battery life is (or should be) sacred.
No complaints so far getting more juice left after longer period!
+1 for improved battery life. i didn't do any measurements. going from stock 2.3.3 to stock 2.3.4 and battery was noticeably better all day. on 2.3.3 it wasn't great, so i'm happy for any improvement.
Agreed, the idle times are insane. Before I was only able to pull a day with less than 20% battery remaining. Now I'm able to get over a day of battery now and still have 50% battery left-over. Wonder how a movie marathon would fair now, compared to before the update.
I'm on 2.3.5 and my battery is at 70% after a 12+ day. On 2.3.4 it wouldn't last anywhere near that. I was charging twice a day.
Sent from my GT-I9100 using Tapatalk
Im using phone for 55 minutes now.. Already 15% gone.. I only checked the forum for couple of minutes..
Sent from my GT-I9100 using XDA App
Im on 2.3.5 stock, i think its ok?!!
Sent from my GT-I9100 using xda premium
Battery life impressive on 2.3.5
I did my first full battery drain and managed to get 1d18h with quite a bit of use. Wifi on all the time. At least 2 hours of talking. I have dimmed my display but thats it.
Definitely better for me on 2.3.4 - no question about it.
Rather than compare my findings with other peoples the only fair thing to do is compare with the level of my 2.3.3 drain previous to updating. My usage is pretty like for like during the week so this makes for a fair comparison.
On 2.3.3. I could get a couple of days use out of it (a few hours of music, heavy twitter, frequent push gmail updates, camera use, calendar use, alarms etc) and be down to about 20% or so and that made it worth a recharge overnight. That was still ok for me and fair enough.
From a full charge yesterday morning and now into the afternoon on day 2 I still have 70% left. Even if I use some during what's left of the day I'm going to way better off under 2.3.4 - could probably run three days or more at this rate?
I guess it all depends how you use you phone and what parts you use most as to whether any update is better or worse. For me this is way better and I say well done to the update!
My phone is running Rom Kitchen KI4 2.3.4 ROM with CF-Root KI4 Kernal, since I took it off charge 1d 5h 19m, battery = 66%...
Android OS = 1h 19m
Display = 58m
Cell Standby = 1d 5h 19m
Phone Idle = 1d 4h 21m
Wifi On = 1d 5h 19m
Bluetooth = 1d 5h 6m
Android System = 39sec / Stay Awake = 4m 50s
XDA = 2m 42s
Facebook Synch every hour
Beautiful Widgets Synch every 4 hours
Gmail Push notifications on
MyBackyp Pro runs a schedule every day at 11:59 to backup SMS, MMS, Call Logs, Dictionary, Android Home and Settings.
Have received a few sms and emails, browsed the web with Dolphin HD and XDA forums via their app... looks good to me, on the previous 2.3.3 Stock ROM, It would be near dead by now...
On 2.3.3 (stock, NL), my battery was absolutely fine. I got between 2 and 6 days with light usage.
After upgrading to 2.3.4 it got worse. Hardly get 2 days now.
What's even worse is, that now my Android OS process takes 60%, which wasn't the case before. It seems as if 2.3.4 introduced the OS bug, instead of getting rid of it!
The only thing I changes more or less at the same time when I made the update (well, two days earlier actually), was to enable "Use wireless networks" under Location and security. But according to several forums this should not use significantly more battery.
Any ideas what is going on here?
I don't know if it's my imagination, but since the 2.4.6 update, my battery life has dropped a bit. By the time I get into my office from my morning commute, I'm anywhere in the 65-70% battery life after unplugging from a full charge. I haven't done anything new. I always unplug around 8:30 am when I head out, I do some light chatting with gf, browse some sites, check facebook (usually very briefly), and maybe sometimes do a little reading on my device. By the time I get into the office around 9:30 or 10 AM, I'm usually around the 80-85% area with battery.
Lately, doing the same thing, I'm seeing the aforementioned 65-70%.
Is anyone else experiencing decreased battery life since 2.3.6?
I'm on a Tmobile Nexus S, running stock 2.3.6 (no custom ROMs).
2.4.6 ? .... maybe 2.3.6 ... and yes, I also noticed a slight increase in power consuption after the upgrade. The stand-by is still great .. about 0.8 - 1% per hour.
Sorry, yes I meant 2.3.6.
Thanks for replying Ro_explorer. Is your increased power consumption significant? Seeing 65-70% when I'm used to seeing 80-85% as I get into my office, I find, is a large change. To be frank, the battery life of the Nexus S in general isn't so fantastic to begin with... this hit makes it worse.
Anyone else?
I used to get home with about 40-50% after a whole "normal day" (unplugged at 8AM, and getting back home at ~8PM) .. now (with the same average usage) I'm getting home with ~30-40% ... that why I said "slight increase" ...
Not your imagination, I too have noticed this. I hope the next update, will fix this - as I used to get pretty good battery life (even with over 250 apps).
When I recently updated to the 2.3.6, it caused a bug of continuous reboot (every 1-3 minutes), so I had to do a hard reset - now it works fine, but I only have added back about 15 apps - and the battery life sux!
Downgrade OS' it will be ok.
This is so weird. Why is the battery life worse?
onthecouchagain said:
Sorry, yes I meant 2.3.6.
Thanks for replying Ro_explorer. Is your increased power consumption significant? Seeing 65-70% when I'm used to seeing 80-85% as I get into my office, I find, is a large change. To be frank, the battery life of the Nexus S in general isn't so fantastic to begin with... this hit makes it worse.
Anyone else?
Click to expand...
Click to collapse
You want bad battery life? Try an Evo 4g with a Sense rom. I averaged about 6hrs using a 1500mAh battery, in stock form.
The nexus is pretty light on power consumption, if you ask me. I average 15hrs on the stock 2.3.7 rom/kernel combo, with stock battery.
Sent from my Nexus S 4G using XDA App
I'm on 2.3.6 and need to charge every two days. I text a lot and do light gaming. I'm typing this from my phone. Maybe you could drain the battery and wipe battery stats? I'm not even at 50% yet and I charged yesterday.
Sent from my Nexus S using Tapatalk
I also noticed that the battery last less time
I've been waiting to see if anybody else reporting this issue
i noticed a decent increase in battery life going to 2.3.7 and thought that previously the battery life had been fairly poor :\
I am non rooted, and get around 20 hrs on light to moderate use. Again. Stock, non rooted.
How do I recalibrate my battery? I wonder if it could be that...
There are many was to recalibrate. Some involve wiping batt stats, some plugging and unplugging phone several times after charge.
I have always found that using the battery almost all the way down, but not past 5%, and then full recharge conditions it very well.
Oh I've been here to solve the problem
"Why last 2 weeks my Nexus s drain battery so fast ? or I have to calibrate it"
Thank for your notice about update OS to 2.3.6.
I think that's a root cause for me too.
1. Could I rollback to 2.3.4 ,how?
2. Does battery calibration is useful for this case , how?( someone suggest to calibrate when flashing new rom )
Thank you very much..
i want to know who have some methods to do with this stuff
borrowedchief said:
There are many was to recalibrate. Some involve wiping batt stats, some plugging and unplugging phone several times after charge.
I have always found that using the battery almost all the way down, but not past 5%, and then full recharge conditions it very well.
Click to expand...
Click to collapse
Whenever switching roms, kernels, or batteries, i always perform the following :
1. Charge to a true 100% (Battery Monitor Widget will register +0 to +2 mA)
2. Wipe battery stats using recovery (Amon RA has this option for the Evo, not sure about cwm), Battery Monitor Widget, or a dedicated app.
3. Discharge battery to 0% with normal usage. When the phone shuts down, I pull and re-install the battery and power back up (it will shutdown again very quickly).
4. Recharge battery and be on my merry way.
Sent from my Nexus S 4G using XDA App
I found one workaround solution for this issue on
ww.google.com/support/forum/p/Google+Mobile/thread?tid=1684c50cea15282a&hl=en&fid=1684c50cea15282a0004af022e5ed212
Sproogle77 's solution
Problem solved. Using the OS Monitor app, I found that the main culprit was Google Services - the Contacts sync specifically. Even though I had this disabled (only Gmail was being allowed to sync) it was constantly working, apparently trying to fix a location. The message log showed that it was generating continuous debug messages, all about locations - around 10 of these every second.
I have solved the problem by disabling 'Use wireless networks' under the Locations & Security settings.'Use GPS satellites' is still running. This immediately dropped my CPU usage - which had been running around 30 to 40% even when otherwise idle, to around 10%. Google contacts sync is now using 0% of the CPU. The difference in battery life was pretty much immediate and is now back to what it was before - the change in the slope on the battery usage graph is remarkable!
This doesn't really seem like a solution to me, and I don't know whether other aspects of my functionality are being affected, but at least my phone is properly useable again.
I'm testing for 1 day and I think that's working for me.
onthecouchagain said:
This is so weird. Why is the battery life worse?
Click to expand...
Click to collapse
One reason is that the new version of the stock kernel removed a speed stepping, so it'll power to higher levels faster, thus using more battery.
rentaric said:
One reason is that the new version of the stock kernel removed a speed stepping, so it'll power to higher levels faster, thus using more battery.
Click to expand...
Click to collapse
That actually isn't the problem. I'm using netarchy's kernel and still get this problem.
My battery life dropped from 16 hours --> 6 hours. the slope on my battery usage life is horrible the system is also awake almost constantly even when I'm not touching it / getting no messages.
I will try the fix suggested on the google support forum and see if that does the trick. sloppy update.
So, I decided to finally root my SGSII..and everything went smoothly..n I was happy knowing that now I could do many things with my phone...it eas working normally with no issues but, after some weeks, my battery life was just awful..it wouldn't even last 15 hours..n I was worried..started searching for solutions, but didn't find them..n then Istarted getting used to to this poor battery life..
Now the interesting story..
One day,I went to fetch my SGSII n I was expecting it to be off, with no battery, n thats what happened,n I didn't even bother charging it..it remained fully discharged for, I think more than 24 h, then the next day, I needed it so, I fullY charged it, turned my phone on, n started using it..
by night I was expecting my phone to be fully discharged..BUT, it wasn't the case this time around as my phone's battery started working normally..just as it before...
Try it...at least it is not risky
Sent from my GT-I9100 using xda app-developers app
Sorry, I saw empty post. My response is now useless.
But... how will I survive an entire 24 hours without my beloved SII?
Most people just learn why the battery drain occurred. And fix that.
Basically this works with Battery Cycles - discharging your phone from 100 to 0 and charging it all the way up again without interruption; has proved to be a handy way to keep a healthy battery life just as my SII has did.
do u huys have experience with battery caloboration apps?
andysoserious said:
do u huys have experience with battery caloboration apps?
Click to expand...
Click to collapse
They don't work. Ignore them. Simply charge your phone to 100% from flat and its battery will be calibrated.
Also disable chatting programs like msn messenger, whatsapp, kaokaotalk, facebook will save your battery. Those apps keep updating and sync at background.
neo335 said:
Also disable chatting programs like msn messenger, whatsapp, kaokaotalk, facebook will save your battery. Those apps keep updating and sync at background.
Click to expand...
Click to collapse
Never had a issue with Whatsapp or Facebook when set to PUSH mode rather than scheduled updates.
Epic first post. I found that if I don't use my phone, the battery lasts longer than if I do use it. Hope others share their tips too, as there's a shortage of battery threads.
Its not that important that you wait 24 hours.
The most important thing is that you let your phone discharge until it has very few percents left or even shuts down by itself.
If you then fully charge it while it is shut down you should get much better battery results with your next circle :good:
battery life
my battery life is awsome!! after 22 hours of a very little bit of use i had 76 % battery life left !
siyah kernel 3.5.2
rootbox JB 2.0
i had almost 2 day with rr 2.6.1 and cm9 . i think that this is the perferct combination for baterry.
Leaving empty (0%) lithium-based battery without charging for more than 2 hours is stupid - lithium batteries are degrading very fast in empty state.
// tip for notebooks and phones
i getting also faced this problem too. Empty that battery and charge handphone on offline to make it fully chargging.
SniperDW said:
But... how will I survive an entire 24 hours without my beloved SII?
Click to expand...
Click to collapse
LOL!! I agree cant go that long with out it..Might go crazy!!
[QUOTE=
I usually get slightly over a week with my OEM battery. I put it in Airplane Mode and leave the screen off.
Swyped from Outer Space
Don't worry about the battery life. Just use the phone through the day as God intended, dock it at home or in the office and charge it over night.
Job done.
Sent from my GT-I9100 using xda premium
I think this will be a good general discussion:
Whats the battery performance like for you guys on a 2 year old phone, i know after a while the battery begins to degrade which is why im trying to see if this is the case for everyone :laugh:
Also what rom, kernel, tweaks are you using to get your current battery
1.5 years ago I easily get 6-7 hours screen on with power saving mode, for now i only get 4-5 hours with the same usage with Hurricane rom.
this phone is not two years old......
Yeah this phone is not 2 years old yet.. but aside, I love the Note 2 and don't plan on upgrading. I have 6 batteries for it, plus a external charger, so I never have to plug my phone in again. As far as UI goes, yes, it's missing some features, especially on 4.1.2 (luckily I never did the update ), but its multitasking features are kick-ass. At least for beginners. I had to tweak things to my liking, thanks to Xposed, such as default expanded notifications, Multiwindow for all apps, and such, but now that I have so much time into tweaking this phone I have no reason to upgrade.
I hardly noticed any difference between the time I purchased and now. My phone is 18 months old now.
Then again it could b me using 2 batteries and rotating the battery between uses so it doesn't degrade that fast.
But then again I'm not on stock rom. I was using miui in the past. Then regret upgrading to 4.3 which I found it too big of a hassle to downgrade to use miui again (4.1) and used hurricane rom with note3 mod installed. I tried ditto kitkat beta and rc1 but always reverted back to hurricane after a day of usage.
Sent from my GT-N7100 using Tapatalk
Mine last fine, about 5 or 6 hours of screen on.
Kitkat official, about 30apps frozen (Samsung I hate you lol), and greenify ftw.
Enviado desde mi GT-N7100
imran429 said:
I think this will be a good general discussion:
Whats the battery performance like for you guys on a 2 year old phone, i know after a while the battery begins to degrade which is why im trying to see if this is the case for everyone :laugh:
Also what rom, kernel, tweaks are you using to get your current battery
Click to expand...
Click to collapse
Im getting 4+ hours screen time with average 15+ hours minimum of use .
this is on 4.3 stock rooted and AGNi kernel set to extreme battery saver.
normally charge phone when still at 20%.
On stock 4.3 I was getting best 14 hours.
pvaldeben said:
Im getting 4+ hours screen time with average 15+ hours minimum of use .
this is on 4.3 stock rooted and AGNi kernel set to extreme battery saver.
normally charge phone when still at 20%.
On stock 4.3 I was getting best 14 hours.
Click to expand...
Click to collapse
Hmmm thats what i get roughly without the extreme battery saver but with the touchwiz power save mode turned on!
imran429 said:
Hmmm thats what i get roughly without the extreme battery saver but with the touchwiz power save mode turned on!
Click to expand...
Click to collapse
thats minimum because when playing clash of clans all day in a marathon to collect lute really kills battery. With norman use easy get 18+ hours easy.
I also de blotted my stock 4.3. Eitherway better battery than before.
cheers
I was stock rom and after numerous useless updates from samsung my battery wont last even 12 hours. I moved to xperized rom and even then battery backup was less. I have just switched to SuperBeam and I am seeing an improvement. will post detailed update later. right now getting near 14 hours with 3-4 hours screen time with wifi and bluetooth constantly on.
agm_105 said:
I was stock rom and after numerous useless updates from samsung my battery wont last even 12 hours. I moved to xperized rom and even then battery backup was less. I have just switched to SuperBeam and I am seeing an improvement. will post detailed update later. right now getting near 14 hours with 3-4 hours screen time with wifi and bluetooth constantly on.
Click to expand...
Click to collapse
Hmm yeah thats what i get too here and there depends on if i play games or not which i rarely do! Im trying out Omega rom v27 4.4 atm and testing the battery for a couple of days :fingers-crossed:
really guys only 6-7 hours? I go at least 10-12 hours, yeah of course it depends how much you use it for example when I use 3G and Wifi Hotspot simultaneously the battery drains like 1 second for 1%. I recommend you guys to install WakeLock Detector app. This app will tell you which app drain your battery, and guys, remove the facebook app as soon as possible it was on the top of the list.
manuel1992 said:
really guys only 6-7 hours? I go at least 10-12 hours, yeah of course it depends how much you use it for example when I use 3G and Wifi Hotspot simultaneously the battery drains like 1 second for 1%. I recommend you guys to install WakeLock Detector app. This app will tell you which app drain your battery, and guys, remove the facebook app as soon as possible it was on the top of the list.
Click to expand...
Click to collapse
please reread,they are speaking of screen on time not total time
After a long time i cn see this result.Thanks to geekynoob.
I am on Stock 4.3 and last battery report attached
Sent from my GT-N7100 using xda app-developers app
My battery life is steadily declining. Still getting by the day, but not easily like it previously was. Hopefully it'll last until the Note 4 hits.
Is there an app out there that can accurate measure the battery of your phone?
There are tons of battery app , there is one that comes with CleanMaster app hope that should be good as cleanmaster is good app
I get 2 hours and 30 min with screen on and 5 hours with the phone off the charger and on 3g and 2 hours with screen on and 4 hours on 4g with screen on with stock 4.3 and custom roms and i get 7 hours with the on wifi and 2 hours 30 min with the screen on that is with good signal and on Telstra.
Apps i am using are facebook and facebook messenger and pocket cast and google apps that is all on 3g
I've only had the Phone since 16th of January 2013 and that is with two battery as well
After 1 year 2 months of usage, my note 2 lives around 7 hours screen on for wifi and 5 hours screen on for 3G