Database Users

Dialer app and other unneeded apps.

I keep finding Dialer running on my 101. How do I remove it entirely and what other apps can I remove?
Sent from my A101IT using the XDA mobile application powered by Tapatalk

First of all your device must done permanent rooted.
I had used this method http://forum.xda-developers.com/showthread.php?t=930197
After rooted you can move/remove these apps from /system/app to /sdcard/backup via Root Explorer app.
- DemoMode.apk
- OnlineRegistration.apk
- Protips.apk
- QuickSearchBox.apk
- StartupWizard.apk
- TelephonyProvider.apk
- Phone.apk <-- when you move/remove this app an error message will show as force close, reboot your device.
Do it with your own risk.

jakkrith said:
First of all your device must done permanent rooted.
I had used this method http://forum.xda-developers.com/showthread.php?t=930197
After rooted you can move/remove these apps from /system/app to /sdcard/backup via Root Explorer app.
- DemoMode.apk
- OnlineRegistration.apk
- Protips.apk
- QuickSearchBox.apk
- StartupWizard.apk
Click to expand...
Click to collapse
Yeah these can go. There is another one the firmware upgrade thing I don't have access to my device just now but I suspect it can go too.
jakkrith said:
- TelephonyProvider.apk
- Phone.apk <-- when you move/remove this app an error message will show as force close, reboot your device.
Do it with your own risk.
Click to expand...
Click to collapse
And again with the TelephonyProvider.apk and Phone.apk. I can't understand why people want to remove them.
It's not because the Archos is not a phone that they are not needed to support the Android operating system and all the apps that you are going to be install.
TelephonyProvider.apk is only 49k and probably does contain no real functionality only entrypoints for other apps that expect the functionality to be there.
Phone.apk contains the complete contacts management and probably also some empty entrypoints that other applications expect.
So even IF you could remove them it would cripple about 50% of all apps you could install via the market.

wdl1908 said:
And again with the TelephonyProvider.apk and Phone.apk. I can't understand why people want to remove them.
It's not because the Archos is not a phone that they are not needed to support the Android operating system and all the apps that you are going to be install.
TelephonyProvider.apk is only 49k and probably does contain no real functionality only entrypoints for other apps that expect the functionality to be there.
Phone.apk contains the complete contacts management and probably also some empty entrypoints that other applications expect.
So even IF you could remove them it would cripple about 50% of all apps you could install via the market.
Click to expand...
Click to collapse
I'm noticing this is a real bugbear for you!
I think people initially started asking about this because of this thread on the Nook forum. It was suggested that removing these would shut off the cell standby service, and improve battery life ... dramatically.
Have to say, I'm using Uruk 0.5, which has Telephony.apk and phone.apk removed, and have not had any problems installing any apps, using contacts etc.

fisha21 said:
I'm noticing this is a real bugbear for you!
I think people initially started asking about this because of this thread on the Nook forum. It was suggested that removing these would shut off the cell standby service, and improve battery life ... dramatically.
Have to say, I'm using Uruk 0.5, which has Telephony.apk and phone.apk removed, and have not had any problems installing any apps, using contacts etc.
Click to expand...
Click to collapse
Good for you did you read the thread? on page 14 ther are some interesting observations about removing those files. It does not affect battery life. But I guess impression are everything. Anyway I still suspect people are going to run into trouble by removing these things.

wdl1908 said:
Good for you did you read the thread? on page 14 ther are some interesting observations about removing those files. It does not affect battery life. But I guess impression are everything. Anyway I still suspect people are going to run into trouble by removing these things.
Click to expand...
Click to collapse
have to say, no I didn't read much of that thread! Doubt it's something I would have bothered removing myself, but thought I'd mention that the setup I'm using hd them removed and it didn't seem to be causing any problems.
Though, if I do get odd problems with contacts, apps not working properly, I'll know what to check first, won't I

After removed TelephonyProvider.apk and Phone.apk I have not found any problem about Market app download. Contact app still work fine and can sync with Google contact.

I can't see noticeable battery saving by removing both phone.apk and telephoneprovider.apk; but agree removing them don't have any negative effects so far

Wow.. This battery Saver App really Works

Its stops the tablet from searching for a cell phone signal that eats up some of the battery.
Acer Iconia Phone Disabler (strange name)

zanetti2000 said:
Its stops the tablet from searching for a cell phone signal that eats up some of the battery.
Acer Iconia Phone Disabler (strange name)
Click to expand...
Click to collapse
Please provide a link when posting info in future for reference
here's the reference :
http://forum.xda-developers.com/showthread.php?p=14053121

I went ahead and downloaded the app..but becuase of differing opinions on the feasibility and safety in removing or changing those 2 .apk files...im a bit reluctant to actually use it. Anyone have any wordds of wisdom one way or another?
Chlballi

It's a good app but i worry cannot update to 3.1 after root it. So wait for Honeycomb 3.1. Thanks for sharing

is thera any other way to disable cell stanby? not buying this app?
i've deleted phone.apk and telephonyprovider.apk through system apps remover but cell standby is still draining my battery

Glebaka said:
is thera any other way to disable cell stanby? now buying this app?
Click to expand...
Click to collapse
Well, I did the same thing - downloaded then changed my mind and uninstalled. It's nothing more than renaming the telephony.provider and phone apk's so why pay - you need to be rooted to use it anyway so why not just rename them?
BUT - there's a big issue if you need to do a hard reset and also, you will not be able to get the update because as we know, the updating procedure checks for completeness of all the apps - if any are missing, it won't install.
I'm waiting for Acer to fix this (actually it's a Google problem since many other tablets have this issue).

Convenience, maybe?
It's quick, don't have to mess with remounting /system to read/write. And when it's time to take that update, just run it again and click "Enable" and they are back to normal. After an update, you can disable them again, if they haven't fixed the battery drain issue.
docfreed said:
Well, I did the same thing - downloaded then changed my mind and uninstalled. It's nothing more than renaming the telephony.provider and phone apk's so why pay - you need to be rooted to use it anyway so why not just rename them?
BUT - there's a big issue if you need to do a hard reset and also, you will not be able to get the update because as we know, the updating procedure checks for completeness of all the apps - if any are missing, it won't install.
I'm waiting for Acer to fix this (actually it's a Google problem since many other tablets have this issue).
Click to expand...
Click to collapse

I have a way that seems to work for me... I downloaded power widget, made 2g/3g toggle, clicked it, then unchecked everything. (Doesn't delete or rename anything) and my tablet no longer wastes battery on cell standby

CM7 - things I can delete without a problem?

I've removed these (below) seemingly without any adverse impact.
camera.apk
MMS.apk
Phone.apk
TelephonyProvider.apk
Are there any other apks that the Nook CANNOT use, and could be removed without impacting the device? Like looking at battery use - Phone Idle is the 2nd most active... Can I rip that out anywhere?
My apologies in advance if there is a thread of this (for the Nook) - just post the URL and I'll read that.

There was actually a fair bit of experimentation about this a while back and IIRC it was found that removing the apps didn't affect battery life at all, since they had no hardware to power up to do anything to, but did cause apps to dissapear from the market instead.
Sent from my HTC Vision using XDA Premium App

The only advantage I've found from removing default apps (besides the 10 MB or so of flash that is saved...) is that the Nook boots up faster. Once booted I've seen no differences except the expected FC if you try to launch an app that requires something that you removed.
Martian21

Even if it doesn't effect battery life, I tend to remove things that are of no use on the Nook. My list of removed apk's include:
Camera.apk
Cyanbread.apk
Email.apk (I use Gmail)
FileManager.apk (I use Root Explorer)
LiveWallpapers.apk
LiveWallpapersPicker.apk
MagicSmokeWallpapers.apk
Mms.apk
Phone.apk
Protips.apk
SoundRecorder.apk
TelephonyProvider.apk
ThemeChooser.apk
ThemeManager.apk
VisualizationWallpapers.apk
VoiceDialer.apk
After moving these to my SD card for safe keeping should anything go awry, I reboot immediately and haven't experienced any issues at all. If you don't reboot pronto, it can go into a force close loop, but after a reboot, everything's fine.

shawn605 said:
Like looking at battery use - Phone Idle is the 2nd most active... Can I rip that out anywhere?
Click to expand...
Click to collapse
And in answer to this question, "Phone Idle" is just what the O/S calls it when your device isn't doing anything else (but is still "awake"). Replace the word "Phone" with the word "Device", and think about your car idling, and you'll get the picture.

Unfortunately they come back when you flash an update.

dargocitfer said:
And in answer to this question, "Phone Idle" is just what the O/S calls it when your device isn't doing anything else (but is still "awake"). Replace the word "Phone" with the word "Device", and think about your car idling, and you'll get the picture.
Click to expand...
Click to collapse
Clever, so what do we remove?

epitaphromance said:
Clever, so what do we remove?
Click to expand...
Click to collapse
In order to increase battery life? As far as anyone can tell, removing APKs doesn't really make your battery last any longer, as the O/S doesn't use them unless called upon to do so. (If, for example, phone.apk was eating your battery, then you would see "Cell Standby" on the Battery Use screen.) Removing them (refer to the list ChrisDDD posted) can make the Nook boot up faster, but if some application tries to access them and they aren't there, then you can get Force Close errors.
A large "Phone Idle" percentage just means that most of your battery was taken up by your Nook sitting there, awake, waiting for you to do something with it. It is actually the lowest battery drain status you can have, except for Deep Sleep. If your Nook is not going into Deep Sleep, then you'll want to read through the other threads on this issue for ideas on how to fix that. (Turning Wifi turn off when the screen is off seems to help me.)

bigbob23 said:
Unfortunately they come back when you flash an update.
Click to expand...
Click to collapse
Not if you remove then from the /system/app folder in the ROM .zip file before you flash it. Grap 7-zip and have at it.

Guide/HowTo/Tips'nTricks - The perfect Nook Simple Touch Setup w/ battery optimizati

Guide/HowTo/Tips'nTricks - The perfect Nook Simple Touch Setup
Nook Simple Touch (N2E) power management / battery optimization
Prerequisites:-
You know how to backup & restore,
You have a working backup
Unregister & wipe user data
(It is not required to register the device!)
Start with stock N2E running f/w v1.0.1/v1.1.0/v1.2.0
(If you have customized it somehow, please reset to stock)
Update to f/w v1.2.0
(This has the 1.1.0 kernel + some WiFi corrections)
Root the N2E device
Lets Begin:-
Uninstall the following stock apps:-
AFfileDownloadService.apk (Hint: disables book covers, skip it if you like book covers)
AccountAndSyncSettings.apk
BnAuthenticationService.apk
BnCloudRequestSvc.apk
CloudService.apk
DemoMode.apk
DeviceManager.apk
DeviceRegistrator.apk
Music.apk
NookCommunity.apk
Phone.apk
QuickStartActivity.apk
Shop.apk
Social.apk
TelephonyProvider.apk
WaveformDownloader.apk
(Hint: you can just delete the above apks from /system/app/ directory, then reboot)
In file /system/lib/egl/egl.cfg
Delete the line
0 0 android
(I suspect doing this forces h/w rendering, needs more testing)
Download & adb install CPU utility(easier way)
play[dot]google[dot]com/store/apps/details?id=it.sineo.android.noFrillsCPU
Set Min AND Max clock freq. To 300 MHz
Set CPU Governor to ondemand
Set I/O scheduler to noop
check “Apply on boot”
Click Apply
Click Exit
Press Nook “U”/reverse“U” Button> Settings> Screen>Screen Timeout
Choose 2 Minutes.
Exit
Charge the battery to 100%/Full
Reboot
Results:-
Your CPU is now running at max 300MHz
When you want the N2E device to sleep, remember
DO NOT PRESS Power Button to set the N2E device to sleep
DO NOT LONG PRESS the “U”/Reverse“U” Button to set the N2E device to sleep
If you leave the N2E device alone, it will AUTOMATICALLY go to sleep,
after the 2 minute timeout set by us.
After a overnight/12 hour period check the battery level indicator by waking up the N2E device,
if it automatically entered sleep state at 100% battery charge, it should wake up at 99%
(Ideally loses ~1% charge, and most certainly less than < 3%)
Before this process, it would lose battery charge at the rate of ~3%/hour of sleep.
Further customizations:-
Launcher:-
Best launcher seems to be ReLaunch v1.3.8
Also note: It seems to use ~20% CPU while idle, time to bug the developer
meanwhile best not to leave it running then huh?
Button reccommedations:
set the lower left page turn button mapping to Android back button
set the lower right page turn button mapping to Android menu button
App recommendations:-
Browsers:-
Both Opera Mini & Opera Mobile work great
(Perhaps if someone can point out how to disable all opera menu animations, they annoy a bit)
Note: browsers use CPU & GPU,
better set your CPU scaling
min 300 MHz
max 800 MHz
only while browsing, and then reset it back to 300 MHz max when finished with browsing
eReader App:-
Nook stock reader is the BEST ePub reader,
FBreader & coolreader are good
(Hint: disable all animations etc) these are useful to read *.mobi
mantano free/paid app
useful for reading PDFs (also reads epub/mobi/etc)
(Note: Nook's 6inch screen is problematic for reading PDFs )
Kindle App (v3.0.1.70) works w/ Nook android 2.1
(I need to figure out how to use it as a reader w/o registering with amazon, else its useless)
Firewall :-
One would assume iptables would be build-in to the linux kernel, but no that module is missing
netfilter.ko
x_tables.ko
xt_tcpudp.ko
nf_sockopt.ko
ip_tables.ko
ipt_addrtype.ko
iptable_filter.ko
I can't use Droidwall firewall, need to do something about net security
Device syncing options:-
Recommended to use calibre to sync your library to device'SDcard
Currently, I'm Rsyncing the SDCard to PC & back via Samba file sharing, Rsync running at PC end.
(If its possible to have Sdcard as EXT4 instead of FAT32 mounted, then simple Rsync at PC end will be best)
Hint: (ofcourse all this rsyncing & samba to avoid dropbox roundtrip)
Requests:-
Please try the above process to further narrow down the power management issues, so that it becomes
easier for all of us to set the NooK N2E to sleep properly.
After testing the process, perhaps it's best to host this content on the nook wiki here:-
nookdevs[dot]com/Portal:Nook_Simple_Touch
Also, would be nice to get a proper firewall for N2E, need kernel module
Screenshots:-
hxxp://i[dot]imgur[dot]com/q1a34.png
hxxp://i[dot]imgur[dot]com/EPcqH.png
hxxp://i[dot]imgur[dot]com/W6Zbw.png
hxxp://i[dot]imgur[dot]com/wK8z8.png
Post your feedback here!

Thread Updates
Reserved for links

Nice!
Nice!
just one note - my book covers no longer showed, when I restored AFfileDownloadService.apk then the book covers were visible again - on NSTGL

Good work. This does make one wonder why B&N would leave things like Musik.apk and Phone.apk and TelephonyProvider.apk on a device that doesn't have these capabilities.
Has anyone yet determined everything that can be removed from init.rc? I have looked at it several times and there appears to be a lot of junk in there. I am wondering if we could see an increase in battery life and/or performance by getting all unnecessary services turned off.

reader-app
jam_dev said:
Guide/HowTo/Tips'nTricks - The perfect Noost Simple Touch Setup
eReader App:-
Nook stock reader is the BEST ePub reader,
Post your feedback here!
Click to expand...
Click to collapse
hi,
good alternative imho is the Mantano Reader
> mantano.com/mantano-reader-for-android
has some outstanding features and PDF-rendering is the best I have seen so far

updated thread
@ladykayaker
Updated the HowTo, to include a hint/warning that deleting AFfileDownloadService.apk will result in losing book covers
(I do not browse by book covers as there's too much scrolling!)
@David0226
B&N just took the same system from Nook Color and adapted it to an e-ink perl display screen
they only did the bare minimum changes needed to reduce cycletime/turnaround for their product
Reg. further battery optimization, there are 2 major power suckers in any device
a) the CPU (which we scaled to 300 MHz, undervolting is not advisable)
b) screen (using eInk display so its already low)
we optimized the sleep function to ensure the 2 major power hogs are under control
any other power usage reduction from killing idle process will not have a statistically significant benefit, (i think)
better you go for an extended battery pack instead
@b-m-n
I've included mantano readed as pointed out by you in the HowTo
though reading PDF is very painful on 6inch screen, either lots of squinting or lots of scrolling
Do let us all know how the battery usage is after using the HowTo
cheers!

@jam_dev
I have finally figured out how to remove DRM from the various ebooks, kindle, epub, etc using calibre.
So I am now converted to only using Calibre.
Now that I have deleted all the apks you suggest, and am using only Calibre I have four books that I purchased through B&N which are still showing in the library.
At my account at B&N I have archived these four books - so they are not showing up as active books at my B&N online account.
On the nook, I deleted the books from /data/media/B&N downloads.
I have deleted the files from /sdcard/.docthumbs
I have removed all the calibre books from my nook.
So now I don't have any books on my nook.
But my nook library still lists the four books that I had purchased from B&N - with the irritating option to download them.
Now that the function to download from B&N has been removed I can no longer sync to B&N. I tried copying the apks back into /system/app but the funtion to sync with B&N is not working anymore - even after copying the apks back.
Is there somewhere the info regarding these B&N books is being stored so that I can clean that as well?

jam_dev said:
Guide/HowTo/Tips'nTricks - The perfect Nook Simple Touch Setup
When you want the N2E device to sleep, remember
DO NOT PRESS Power Button to set the N2E device to sleep
DO NOT LONG PRESS the “U”/Reverse“U” Button to set the N2E device to sleep
If you leave the N2E device alone, it will AUTOMATICALLY go to sleep,
after the 2 minute timeout set by us.
Click to expand...
Click to collapse
Awesome! I've had trouble with battery drain since rooting and this solves it completely.
If I accidentally (old habits die hard...) press the power button my NST will drain battery faster in sleep. Ok, but what happens after that? What if I wake the NST, read some and then want to put it to sleep. Can I then just leave it and the auto sleep in battery saving mode will happen again? Or do I need to go through the CPU utility steps again?

I accidentally delte the line above the
0 0 android
In file /system/lib/egl/egl.cfg
can you tell me what is written there?
the screen is spplitted and reversed and keep flashing

@ladykayaker
Sorry, no idea, i haven't really botherd with the B&N side of the stuff, busy reading instead
@teran_swe
it's automatic, you need not do the reset cpu freq.steps all over again, just let it go back to sleep on its own
@tendousj
original file(<root>/lib/egl/egl.cfg) contains the following two lines
0 0 android
0 1 POWERVR_SGX530_125
cheers!

Hey, how do you get to that filesystem to delete those extraneous apps? I can't seem to find it on my Nook

Ongar said:
Hey, how do you get to that filesystem to delete those extraneous apps? I can't seem to find it on my Nook
Click to expand...
Click to collapse
Use root explorer.apk. The apps can be found in system/app.
And, can anyone provide an updated list of apps that can be safely deleted? i use a rooted nook 1.2.1.

I removed almost apps in app folder, hơever the result does not seem better. My nook, without no frills cpu, lost 1% baterry in nearly 10 hours. Relaunch stills use 10-20% cpu even in idle mode. If i use default lancher.apk, the results seems enhanced (1% per 12 hour)

ectacy said:
I removed almost apps in app folder, hơever the result does not seem better. My nook, without no frills cpu, lost 1% baterry in nearly 10 hours. Relaunch stills use 10-20% cpu even in idle mode. If i use default lancher.apk, the results seems enhanced (1% per 12 hour)
Click to expand...
Click to collapse
Default launcher?
My rooted nook is 1.2.1. Only the relaunch is available. How to shuttle between launchers?
And, what all were the apps you removed?

shriramks said:
And, can anyone provide an updated list of apps that can be safely deleted? i use a rooted nook 1.2.1.
Click to expand...
Click to collapse
AFfileDownloadService.apk (Hint: disables book covers, skip it if you like book covers)
AccountAndSyncSettings.apk
AirRuntime.apk
BnAuthenticationService.apk
BnCloudRequestSvc.apk
Browser.apk
CloudService.apk
DemoMode.apk
DeviceManager.apk
DeviceRegistrator.apk
Gallery.apk
GoogleSearch.apk
Music.apk
NookCommunity.apk
Phone.apk
PicoTts.apk
QuickStartActivity.apk
Shop.apk
Social.apk
TelephonyProvider.apk
TtsService.apk
WaveformDownloader.apk
I have uninstalled them all in my NST, so far so good (quite a while)

Problems wuth N2E 1.1 and Home screen
I tried the above with a nook touch 1.1.0 rooted with touch nooter 1.11.20.
After that, whenever I went back to nook's launcher home screen (you now, pressing "u" inverted button and then the "Home" icon) I got an error message.
Anybody else had this problem, or after this procedure we are no longer supposed to use some of the nook native apps?

Mnurlan said:
AFfileDownloadService.apk (Hint: disables book covers, skip it if you like book covers)
AccountAndSyncSettings.apk
AirRuntime.apk
BnAuthenticationService.apk
BnCloudRequestSvc.apk
Browser.apk
CloudService.apk
DemoMode.apk
DeviceManager.apk
DeviceRegistrator.apk
Gallery.apk
GoogleSearch.apk
Music.apk
NookCommunity.apk
Phone.apk
PicoTts.apk
QuickStartActivity.apk
Shop.apk
Social.apk
TelephonyProvider.apk
TtsService.apk
WaveformDownloader.apk
I have uninstalled them all in my NST, so far so good (quite a while)
Click to expand...
Click to collapse
I just got a Nook UK in the last sale and it's my first one, so I'm a total noob to the e-book world.
However, I'm an android user and rom flashing addicted for long, so since I got my reader I've only been tweaking it and haven't actually read a word... haha.
So, already updated to 1.2.1, rooted, kernel tweaks and the whole lot. I haven't installed gapps on it to keep it minimal as possible, I'm dowloading the apks on my phone and installing via ADB.
So, on to the question:
by removing all these B&N apps does it mean I won't be able to sync/buy from their store?
I'm already getting to know Calibre and checking other places to buy books, but it looks like that if I remove the apps and one day would like to buy from B&N again the only option would be to re-install the apps in order to get the ebook or am I missing something?
tl;dr
Want to keep my NST minimal and remove all clutter, but:
how do you guys manage your ebooks and where do you buy them from without the B&N apps and what to do If I ever want to buy from them again?

Deep Sleep Battery Saver sleeps the kernel whenever the screen gets shut off. It's also highly configurable.
I've been using it to sleep the Nook using the power button. I haven't been following my battery life all that closely, but it seems to reduce battery consumption, substantially.
But it also functions as a background task-killer. If you buy the pro version, you can whitelist which apps get killed.

Mnurlan said:
I have uninstalled them all in my NST, so far so good (quite a while)
Click to expand...
Click to collapse
BnCloudRequestSvc.apk
Shop.apk​I found the without these two apps, the Nook reader had a couple of minor hiccups. Neither the More… menu entry nor double clicking on a book in Library gave book details, for my side-loaded books. I reinstalled the two apk files.

Hi,
I have recently brought the Nook Simple Touch and have routed it using NookManaager 0.5.0. I've been unable to remove the files listed below as they appeared to be in use. I installed TaskXP so I could easily see and kill the running apps so I could then try again but to no avail.
I then reset to stock 2.1, used the Factory option so as not to require registration at all, then rooted and tried again, but again these files are not removable, I have tried both with the reader being connected to the PC and using windows file manager and on the device using the ReLaunch file manage or ES File Explorer but again I am unable to remove these files.... as my device stands at the moment It's discharging at about 1.5 - 2% per hour even when not used.
Any advice on why I might not be able to remove these files would be greatly appreciated.
Regards,
Robert.
jam_dev said:
Guide/HowTo/Tips'nTricks - The perfect Nook Simple Touch Setup
Uninstall the following stock apps:-
AFfileDownloadService.apk (Hint: disables book covers, skip it if you like book covers)
AccountAndSyncSettings.apk
BnAuthenticationService.apk
BnCloudRequestSvc.apk
CloudService.apk
DemoMode.apk
DeviceManager.apk
DeviceRegistrator.apk
Music.apk
NookCommunity.apk
Phone.apk
QuickStartActivity.apk
Shop.apk
Social.apk
TelephonyProvider.apk
WaveformDownloader.apk
Click to expand...
Click to collapse

[Q] CPU usage

I've rooted my new NST, and I noticed that the CPU usage is always above 20% ALL of the time without any apps open.
Is this normal? Because I've also been experiencing battery drain.

No, that's definitely not normal. If you're not using the device, it should spend most of its time in deep sleep. Can you give more details about how you configured it and what steps you took?

bobstro said:
No, that's definitely not normal. If you're not using the device, it should spend most of its time in deep sleep. Can you give more details about how you configured it and what steps you took?
Click to expand...
Click to collapse
I used NookManager, latest version. Previously updated my nook to 1.2.1 from the official website via microSD card.
To root, I followed the on screen instructions.
Later, I installed NTGAppsAttack
Nothing else.
According to the task manager, reLaunch and Android System are the culprits. Now is 24%, at times 40%.

bornlivedie said:
I used NookManager, latest version. Previously updated my nook to 1.2.1 from the official website via microSD card.
To root, I followed the on screen instructions.
Later, I installed NTGAppsAttack
Nothing else.
According to the task manager, reLaunch and Android System are the culprits. Now is 24%, at times 40%.
Click to expand...
Click to collapse
From thread http://forum.xda-developers.com/showthread.php?t=1933615:
Launcher:-
Best launcher seems to be ReLaunch v1.3.8
Also note: It seems to use ~20% CPU while idle, time to bug the developer
meanwhile best not to leave it running then huh?
Click to expand...
Click to collapse

dflt said:
From thread http://forum.xda-developers.com/showthread.php?t=1933615:
Click to expand...
Click to collapse
Going back to original firmware it is.

bornlivedie said:
Going back to original firmware it is.
Click to expand...
Click to collapse
I'd spend a bit trying to figure out why your root went wrong. I haven't bothered with the steps in that linked post. I'm using ADW Ex for my launcher, and my NSTs regularly go into deep sleep. Battery life is very good.

bobstro said:
I'd spend a bit trying to figure out why your root went wrong. I haven't bothered with the steps in that linked post. I'm using ADW Ex for my launcher, and my NSTs regularly go into deep sleep. Battery life is very good.
Click to expand...
Click to collapse
It's just that I (personally) don't think rooting the Nook is essential. I don't use apps, because the display is not made for that. It's slow and painful to use.
It's an e-reader and nothing else, so I want to take full advantage of that, and that includes the best battery life possible.

bornlivedie said:
It's just that I (personally) don't think rooting the Nook is essential. I don't use apps, because the display is not made for that. It's slow and painful to use.
It's an e-reader and nothing else, so I want to take full advantage of that, and that includes the best battery life possible.
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Click to collapse
Stock reader too poor for reading progmming books. In coolreader I set margins to 0 and code text blocks to very small and it's perfect.

[OP]
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Try replacing "Relaunch" with "Legacy Launcher".

btw. does those cpu peaks in relaunch are mesured in the relaunch's build-in task manager?
Edit:
Checking cpu usage of relaunch in it's task manager, I get 10-14% usage. But checking cpu usage in other than the buil-in one task manager I get 0% cpu usage.
TestCenterService gets sometimes 0.02% but relaunch stays 0%.
Edit2:
I'm testing cpu usage with adb and if you don't use relaunch it stays at 0%. Sometimes TestCenterService and Phone peaks.

bornlivedie said:
It's just that I (personally) don't think rooting the Nook is essential. I don't use apps, because the display is not made for that. It's slow and painful to use.
It's an e-reader and nothing else, so I want to take full advantage of that, and that includes the best battery life possible.
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Click to collapse
At the first time, I thought so. However, after experiencing Perfect Viewer to read comics, I was addicted. Moreover, I can add more fonts to support my maternal language ( Vietnamese) and my nook works greatly.
I also Relaunch, it is great launcher and library. Abt battery, my nook can last for more than a week because I often read comics ( which requires full refresh for page turn).

ectacy said:
At the first time, I thought so. However, after experiencing Perfect Viewer to read comics, I was addicted. Moreover, I can add more fonts to support my maternal language ( Vietnamese) and my nook works greatly.
I also Relaunch, it is great launcher and library. Abt battery, my nook can last for more than a week because I often read comics ( which requires full refresh for page turn).
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I tried to read comics and manga, but you have to scroll to see the whole image, and that's not good with this type of screen. If you adjust the page to the screen, the fonts are too small.
So for now, I've got no reason to root my nook.
On topic: battery improved A LOT after I restored my nook. From 1% every couple of hours in sleep mode I went to 0% in 12hs.

bornlivedie said:
I tried to read comics and manga, but you have to scroll to see the whole image, and that's not good with this type of screen. If you adjust the page to the screen, the fonts are too small.
So for now, I've got no reason to root my nook.
On topic: battery improved A LOT after I restored my nook. From 1% every couple of hours in sleep mode I went to 0% in 12hs.
Click to expand...
Click to collapse
I used special software named Dodom Manga downloader to get manga from popular sites ( mangareader, kissmanga). It offer some useful function such as:
- Automatically trim the white border of comic pages
- Resize images to specific size ( 600x800)
- Put all images into one folder so I can create a big volume ( abt 100 chapters per volume).
The result is acceptable