[Galaxy Note II Android Development] magnamentis:
hi, this is a known issue. while i usually have a battery drain of 0.3% per hour in idle mode on cm11 + cm kernel, as you say, once of a sudden

the battery drops by 10-20%, can happen within a few minutes only ( even on charger ) !!!!

similar things albeit only once in perhaps 2 month can happen on the nexus 5 so it's not device specific, it's a know issue in many kitkat roms.

there are several causes, while there is a qualcom-camera-bug on nexus devices, with the n7100 it has soemthing to do with the radios.

precisley phone idle after making a call can kill your battery. as well it happens that if the signal is weak and droping out frequently due

to bad coverage or driving into a garage or for whatever other reason, once of a sudden the same thing happens like described above

with phone idle after making a call. similarly but not that that significantly things can happen on bad wifi signals and/or changing the wifi hotspot.

so it has to do with the radios and even though there are many other possibilities, at least this is one of the know issues which fixes are

on the way. if i remember correctly, CM merged such a fix recently ( it was in the 27th of April nightly ) but i'm not sure if it's a partial fix for

after call events only or if the effect sticks with other similar radio based issues as well.

now as to the workarounds :) reboot is always an option, most often the safest and most certainly working one, while sometimes it's sufficient

to change to airplane mode for a quick second [ or two :) ] and close apps like navigation, bluetooth music etc. and reopen them again.

the latter is an 80%, so if there is a charger close by i choose the later first and if i need the battery to last as long as possible, i choose to reboot.

by the way, beside that "after call" battery drain, see [ http://review.cyanogenmod.org/#/c/63042/ ] it happens for me only under heavy load like

bluetooth media, navigation, radardroid and driving through the mountains with the bike where often the signal is bad for many minutes and often

the signal drops out every 2nd turn and even then it happens only once or twice max per such ride, mostly never at all. so if not already done,

you could choose a cm nightly later than 26th ( today's will have important commits )

Last but not least: No, battery life on cm stock is as good as on agni and devils and thor which i have been using for quite a while.

just got tired to check compatibility upon each nightly flash because cm frequently makes changes which brake compatibility

and so i decided to stay stock cm kernel wise and did not regret ever since. i even achieved that my note2's battery usage in % dropped

under that of the nexus 5 again as it was the best for a long time, while immediately after kitkat release the nexus 5 was unbeatable in

battery life, specially in idle but sot as well.

i hope i could shed some light on the matter for you. as always things are complex and thus there rarely is one way or one explanation

but at least this should tell you that it's not only you and it's not that bad and that it can be managed :)

what do you want to say with that there were plenty of similar commits to solve the bluetooth issue but if you are seriously

trying to say that those with bluetooth issues are dreaming and/or doing somehting wrong, beside the fact that there are

thousands of people having the problem since kitkat throughout many car brands, devices and roms, have a look first at

this link ( CM Changelogs ) to verify that there indeed WAS an issue, at least if you consider that they don't put so much effort

into solving a non-existend problem ( i just don't like those "i don't have the problem" posts since they imply that everybody with

the bug is an idio....t :(

link to cm changelog with bluetooth issue related commits ( some of many in the past ) http://www.cmxlog.com/11/n7100/

as to the battery drain: you don't mention whether it's in idle or non-idle mode but since anything else would be blabala...

i assume it's in idle. so if it's in idle then this drain is huge. for more than 18 months i have never had and/or accepted any

drain higher than 1% per hour in idle and currently i'm on cm11 and get 0.3-0.4% per hours during 8-9 hours night time.

so again i'm not sure what you want to tell us, how good or how bad your battery life is??? if you want to say it's bad, i'll

help you get it much better if you want to say how good it is i must say: IT IS NOT, on the contrary :)

to whom it may concern or feel touched

generally when reading through note 2 threads, how does it come that so many devs angrily stopped developement for

our so good device? how comes that so many devs did not port our device forward to kitkat? how comes that so many

devs produced almost as the last a rom-version for the note 2? there are 2 main reasons for this:

a) exynos chipset is a pain in the a... for devs because they have to do so much coding again just for devices with that chipset

b) generally the tone and attitude in note 2 threads as you can immediately recognize when reading other threads for several roms, devices kernels and

...frameworks and/or mods. all note 2 threads are full of wannabe upperclass members ( not all of course but more than usual ) because the device is

...top of the line, price wise and hardware wise and it is showing.

i'm posting in more than a dozen threads throughout xda and what i've seen here on 3 pages i encounter in other threads in 3 months. like it or not, i don't care it's a matter

of fact observation and it does not make any difference how many people feel offended when xda-rules, politeness and contribution more than leeching are brought to their attention

yes i know that my post are often bull-eye hitting certain narcisstic egos but they alway contain a good amount of understanding and constructive information

and whoever feels like to oversee all the positive parts and just follows his subconscious mind ( instinct ) so what. no-one will gonna change that :) truth and facts

have become a major "crime" in this politically correct world and also on the big global scale, the outcome of all this has well began to show, just watch further :)

Current Devices:

I9100, PAC-ROM 4.3.1 ( Formerly Omni, PA, Dorimanx, etc. )

N7000, 4.1.2 TouchWizz All Stock ( very motivating to continue flashing custom roms further haha.... )

N7100, Cyanogenmod 11, Xposed Framework ( Formerly AOSNP, PAC, Omni, PA, Devil, Thor, AGNI up to 2.7.6, etc. )

Nexus 4, Cataclysm 4.4.2, Franco Kernel r203, Dalvik & Bionic Patched, Xposed Framework ( Formerly PAC, PA, Cataclysm, Faux, etc. )

Nexus 5, Cyanogenmod 11, ElementalX, Xposed, ( Formerly Cataclysm, Franco & FKU Color Control, Dalvik & Bionic, Faux, Bricked, Chaos etc. )