yashsingh1/xdaforums huggingface dataset:
[Nook Color General] mr72:
Screen brightness, maybe wifi access also (how often are you syncing email, calendar, etc., and of course web browsing will use more battery than turning off wifi and watching a movie from the SD card).

But still, 7.75 hrs @10% battery winds up being about 8.5+ hours of total battery life. Not too bad! I have no feedback about how long my NC lasts when doing routine web browsing and other mixed use. Usually I don't run it nearly down to zero, and in the cases I reported before, this was while on an airplane on a transatlantic flight where I didn't have access to power, and I read ebooks going one way for 17 hours and watched movies going the other way for 10+ hours, in both cases wifi was off and screen brightness varied from about 6% to 15%.

I am not aware of this auto shutdown. I have run by battery well below 9% without a shutdown. I suspect it is in one of your settings.

Re-calibrating won't wind up with more battery life, unless you are just disconnecting the charger the moment it hits 100%. If it reads 100% and the battery is only 3900mV, then it will keep charging until the battery really gets up to ~4200mV if you leave it connected. Then it will just "say" 100% until it gets back down below 3900mV. Recalibrating just improves the accuracy of the battery meter.

If you still need more battery life, I suggest these things:

1. decrease screen brightness.

2. change your screen background to something dark, or just plain black.

3. turn off wifi when you do not need it.
[Nook Color General] tonyp:
You can use every android device without a google account. You won't have market access then and can't use gapps, of course.
[Nook Color General] jgaf:
This is weird, my NC has always shutdown after 10%-9%, if I try to turn it on again it just shows the battery low screen and turns off again.

My brightness is usually 0% at night, I use it more at night. During the morning I used to set it at 25%, but now I'm doing 10%-12%. I do turn off the wifi when I'm reading or playing a game, although lately I've left it on to test the limits of the battery.

Thanks for the reply :cool:
[Nook Color General] mr72:
In this case, I bet recalibrating the battery will fix this. Most likely it reads 9-10% but actually the voltage is too low to power the NC. That level should be just a couple of %.

For web browsing and general use, my NC is about 25% brightness. But apps like Moon+ for reading and MX Player for video allow you to set the brightness for just the app, and since it's a full-screen app then it has a global effect. I can read ebooks in Mooon+ with 5-6% brightness at night (dark), and 11% or so during the day or with the lights on. And I find that movies in MX Player look best at about 10% or so brightness.
[Nook Color General] mateorod:
I'm sure this is just a quick way of saying "slider all the way to the left" above, but if you use any kind of tool or prop editor that lets you custom adjust brightness levels, don't go below 5 or so, and definitely never 0!

0 percent brightness is a black screen, and trust me, it is a ***** to undue when you can't see a damn thing.I speak from ill-gotten experience from when I was deep in the throes of a battery maximization obsession. It was not pretty, and my tablet has a lot less FCs now that I have quit trying to freeze "non-essential" processes/apps.
[Nook Color General] jgaf:
I have a brightness widget its really easy to change it since it has preset. Right now I can see perfectly at 0%, just a bit of reflection since its daytime. When screen is black (e.g. reading in nightmode) I use 2% when the room is dark. Otherwise I'm around 10% to 25%
[Nook Color General] davidr415:
Any reason why this method and these settings would not work as well on an SD card install?
[Nook Color General] mateorod:
Trust me, you are not actually at zero brightness. You are the lowest available preset for whatever widget you have used/configured. Some apps that provide brightness Widgets have strict variable levels that they allow you toggle between, others allow you to enter custom values.

It is important to know that you are probably at 7% or so at lowest. Someday you may, like I did, decide to make your own widget with just the preset values you find usefu. If you believe, like I did then and you do now, that zero brightness is simply very dim, you will have a rude awakening when your screen goes black and you cannot remember exactly where the toggle is by touch alone.

Trust me on this one. Or don't and try it, just remember where that widget is placed (I am pretty sure Elixir is where I defined my levels when I did it, but I have seen the capability several places.)
[Nook Color General] jgaf:
When I'm reading in Kobo I can set the brightness down to 0% and you can only see it in really dark rooms with nightmode. The widget I use goes lower than the default brightness levels in CM7, but I got to admit it might be it's not 0% truly. My wallpapers are bright so it makes it easier to see when in such low brightness and I always know where my brightness widget is :D

So I'm going to try to figure out what 0% in this brightness widget really is...

Edit:

Ok I download elixir and it says my brightness is at 4% :)
[Nook Color General] mr72:
I am not aware of any reason, but I have never tried an SD card install.

One thing is the SD<->EMMC swap and the partitioning might be things that don't get along with a SD card install.
[Nook Color General] davidr415:
Thanks Mr72.. I'll give it a shot. I am not unhappy with memory allocation..just shooting for max battery life as I use my NC for only a few things. I've had good luck with the several SD installs I've done.. just trying to make them as efficient as possible on batt life.
[Nook Color General] afghan-gsm-mastermind:
hello to mr72 and other friends

when I install super charge script in last step. when enter 16 device reboot. it is ok or no place give. answer thanks
[Nook Color General] MISRy:
Just dropping a thanks for this being a go-to thread when I needed it.
[Nook Color General] Explore3:
I have decided to implement your setup. I am planning to give my nook to my sister. It looks like a setup that can work without a lot of maintenance. Hope it survives her four kids.

I am wondering about the partition. I have been getting the Amazon free applications on an account for her. Will the large number of games need a larger app partition? I do not have many games installed, so I am not sure where they are stored.
[Nook Color General] mr72:
I don't think you'll need a larger partition for apps. Hard to say though. I guess if you put enough apps, you will run out of space no matter what. I have a TON of apps and still have a lot of space available.
[Nook Color General] mr72:
Thanks for the kudos. It's an iterative thing. Glad it is helping some people out. I really dig my NC with these settings.
[Nook Color General] mr72:
This is not ironic at all. Dalingrin's suggested settings are where I got my suggested settings. I just put them all in along with my big giant setup guide.

They work perfectly for me. No crashes, never a SOD, and very, very good battery life.
[Nook Color General] doncaruana:
And kudos to you for organizing that for everyone! They've been great for me as well! Nice job putting it out there (I was too lazy :) )
[Nook Color General] mr72:
The information was all basically out there, but in different places and not really integrated into one common plan that works. I had just hoped to put it together in one unified guide that shows end to end how to set up a smooth and snappy NC with terrific battery life.
[Nook Color General] hushpup131:
elected not to SuperCharge

Dear Mr72,

A note of thanks... got the NC back from my daughter b/c she couldn't read it well outside by the pool. Used your tweaks.. very stable and it's been a great reader for me.

Thank you.
[Nook Color General] beaujack:
Ran the super whizzed script, the last step. Migrated all angry birds & bookmark. Had CM7 on SD for a week or so. Hey mr72, ain't that Mister Mister on the radio...Thanks a ton, love you man.:D
[Nook Color General] mr72:
LoL. Glad this is working for you guys.
[Nook Color General] rampart51:
Has anyone tried this whole process since the market has changed to PLAY? Do you think I need a new GAPPS?

gapps installs ok and I'm able to add an account ok but when I try to download ROM manager, it says it can't due to an error.

I'm going to try the whole process once more.

So I tried the whole process again and got the same thing. I installed Mirage Kang....maybe I will try the stable as mentioned in the OP.

OK...so thats what the problem was....YOU CANNOT USE THE LATEST MIRAGE KANG!
[Nook Color General] tonyp:
The market should auto update to Google Play. Worked for me.
[Nook Color General] MISRy:
I'm using 03042012 and have gotten a couple of things from GP. I just wish it had a single shortcut instead of one for video, one for books, one for... etc..
[Nook Color General] jgaf:
Same here using latest Mirage's build and Google Play works perfectly.
[Nook Color General] mr72:
No you don't need a new gapps. It will update automatically.

That's a problem with ROM Manager. There were problems with ROM Manager versions in the past with the NC. I have a good version of ROM Manager, so there is at least one that will work.

I really don't think that is the problem.
[Nook Color General] rampart51:
I never got to install ROM Manager. It was DOWNLOADING and said it could not. I tried ES-EXPLORER and got the same message.

Anyway...its fixed now.

Thanks for your effort here MR72!
[Nook Color General] Explore3:
Glad to heat that you are using mirage. I am going to prepare my nook following these instructions. After making sure everything works, I will be shipping it to my sister.

PS I hope everything will still work after I delete my google account from the nook prior to shipment.
[Nook Color General] chrizfitz:
Can you confirm something before I get started?

Copy the following files to the "boot SD" which you prepared with Win32DiskImager (Note: do not unzip them.):
A. The CM7.10 Stable ROM, although personally I am using a build from another source which I don't really recommend. Note: I have had occasional issues with certain builds from the non-CM7.10 ROM, but overall they tend to be pretty stable and moreover, they run fast on your NC and do not unnecessarily hog battery life. However, for the normal user (i.e., someone not interested in tinkering or frequently updating), I strongly recommend the CM7.10 Stable. It's the set-it-and-forget-it best option. If you would like any more discussion of these, PM me.
B. gapps-gb-20110828-signed.zip

The first line here says "Copy the following files to the "boot SD"". Do you use win32diskimager to write the files to the device? I'm asking this because when I used win32diskimager to write 1gb_clockwork-3.2.0.1-eyeballer.zip to the boot sd W7 told me I needed to format the card to view it.
[Nook Color General] mr72:
You should be able to put them on the SD card without win32diskimager. you only use disk imager to write the eyeballer image. there is space on the card for the files. I have done this many times, on win7.

I don't know what issue you are having with win7 reading/writing that SD. it should work.
[Nook Color General] chrizfitz:
I was writing the .zip to the sd card and not the .img inside the zip file. Thanks for getting back to me. Guess its the first time it happened but maybe

"Use Win32DiskImager to write the 1gb_clockwork-3.2.0.1-eyeballer.zip image to the boot SD. You must run Win32DiskImager as administrator!"

could be changed to:

"Download and unzip 1gb_clockwork-3.2.0.1-eyeballer.zip. Use Win32DiskImager to write the 1gb_clockwork-3.2.0.1-eyeballer.img image to the boot SD. You must run Win32DiskImager as administrator!"

or maybe not. Thanks again and I look forward to seeing the results on my NC
[Nook Color General] beaujack:
I have reread the instructions at the head of this thread several times. I installed CM7.1 on emmc 3/12/20012 after running CM7.1 on SD card since 1/20/2012. The emmc install went well and I am very happy with it. However I am unable to 'see' the SD card. In addition, In ROM Manager, although I ran a backup, when I attempt Manage & Restore, the directory is empty. The backups ended up on the SD card which is invisible. The USB cable does not 'see' anything, the two drives F and G are grayed out in the eject process. I spent thirty minutes Samba-ing the backups files from my PC to the emmc 'SD' card, and ROM manager can't see that either. I know I can retore by diddley-doofing with a boot SD, so my knickers aren't in a total twist, but I certainly would like to 'see' the SD card, 'see' the NC via USB, be able to backup & restore w/o extra effort. Otherwise, my NC does everything I want. I did verify the Cyanogenmod settings and the repartitioning worked so I am at a loss.
[Nook Color General] mr72:
I don't know what the problem is with your SD card. There must be some setting different from my NC. If you followed the instructions, then on the NC you should have:

"/mnt/emmc" --> this is your actual physical SD card

"/mnt/sdcard" --> this is the 4GB internal partition

Apps that insist on using the sdcard for storage and won't look anywhere but "/mnt/sdcard" for files (such as some of my favorite music players) will not be able to "see" the actual SD card, since it is mounted at /mnt/emmc. Your ROM backups, if done to ROM Manager's impression of "/mnt/sdcard", will not restore when you reboot into recovery automatically because it will not find the file where it expects it, but the file is there, just on the /emmc partition.

Under Settings -> Storage, you should show:

SD card

Total space : 4.20GB

Internal storage

Total space : 1.93GB

Additional storage: /mnt/emmc

Total space : <whatever the size of your physical SD card>

You might also try the app "NookColorUMS", it may give you some options for mounting the USB mass storage in the way you like. I am not sure what the defaults are with your version of CM, so it could be that the NC is just not mounting the USB Mass Storage as expected.

And by "see" the SD card, I am assuming you mean, when it is plugged into the computer, it is not mounting. Certainly you can access it on the /mnt/emmc mountpoint in your NC.
[Nook Color General] beaujack:
Thank you yet again. In Settings/Storage I see exactly those values which you have provided. I am content and consider this issue, arising from 'Pilot Error', to be solved. I am more than satisfied with your help and the installation of CM7 on my NC.
[Nook Color General] rtramsay:
Love this setup and I can see the improvement on my battery life, this is just what my overworked NC needed. Thanks MR72. But I've got a problem and I don't know if it's related to the roms used for this, or something else entirely. I've been trying to set up my corporate exchange email account but have had no success with any of the apps that are supposed to handle these emails including Touchdown. I've searched everywhere and no one else seems to have this problem. My IT dept. couldn't figure it out and I've tried the CM7.1 and the latest CM7.2. If this has nothing to do with these roms then just ignore this but any help would be greatly appreciated.
[Nook Color General] mr72:
I can assure you it is not related to the CM7.x ROM or any of the settings I suggested.

I also have corporate exchange set up and working just fine on my NC using just the stock Android email and calendar apps. But Exchange is not universal to set up and doesn't really interact with other things predictably. It took some tinkering to get mine to work and I am sure it will take such tinkering to get yours to work as well. However, this is not the right place to discuss that. I'd head over to the Themes and Apps forum and ask there.
[Nook Color General] ravip_27:
Hey Guys

Need some help here as my nook is no more booting. I followed the instruction to repartition in Step 15. Did these two steps

Boot into ClockworkRecovery with the above SDcard inserted in the Nook Color.

Install the repartition package from the SDcard, to repartition /data (0p6), /cache (0p7), and /media (0p8). (just select install from and selected the repartition zip - did I do something incorrect here?)

Mandatory REBOOT into ClockworkRecovery.

However once I did reboot into ClockworkRecovery initally my nook booted with the cynaogen boot figure but then it shutdown and now it does not even boot. I tried pressing power + N button but still it does not boot. Any suggestion how to recover it

Thanks for your help

---------- Post added at 05:12 PM ---------- Previous post was at 04:47 PM ----------

Updating my own message.

Was able to resolve it by leaving the nook for 5 minutes and then booting with an old bootable microSD card and then swapping it with the data card with the repartition card in it.
[Nook Color General] Woody:
First let me say thank your for this guide that actually has working links. My wife got a NC the other day and I have been reading and searching and downloading but am finding some of the older posts with dead links (especially some stickies).

She got the NC off Ebay and right now it is running a modified version of 1.4.1 and I have tried both Rack's Dual Boot (CM7/9) and Honeycomb both to no avail for some reason. Was able to boot into both of them, sign into market and download max of 5 apps and then FCs everywhere (both Gapps and non-Gapps across the board and yes I wiped and fix permissions). At first I thought it was the MicroSD, so I switched them, then a bad download, so I re-downloaded them. Nothing.

She really wants an inexpensive "tablet" and I think that this is the way to go for her right now. I have a Transformer and she wants to be able to do "some" of the same things that I can. I've already explained the limitation between the two devices, so she's cool with that.

My question is this. Once we have repartitioned the internal to the 2+4 and say something goes haywire and she wants me to put NC stock or some other ROM on it, will the internal get repartitioned back to "normal" when I reflash those ROMs? Basically, I am asking if I repartition using your zips and I want to try another ROM for her, is there going to be any backlash or wonkiness because of your restructuring of the internal EMMC? If so, how can I get is back to whatever normal is? It isn't like you can use a partition wizard is it?
[Nook Color General] mr72:
You are welcome. Glad it is useful.

First of all, you know other people created these zip files and things. I just collected the links and came up with a repeatable method to make it work together.

Anyway, as far as I know, flashing ROMs is not going to impact the partition scheme, nor will it be impacted by the partition scheme. You are not reparitioning the part of the memory where the ROM is written, you are just repartitioning what would be essentially user data space.

If you want to get back to "normal", you can use the other partitioning scripts that are in the same post as I linked to for the 2+4GB partition scheme. The 2+4GB is not stock, but there were more than one stock partitioning scheme out there so you can restore to one or the other of them if you like, noting that the process is destructive and potentially you may one day wind up with more data in the backup of one of the partitions than what will fit in your restored partitions. That's kind of the point, FWIW.

If you find you have to restore the whole thing to stock (like, you are selling it to someone who prefers it to be stock) then you may desire to repartition it back to stock layout, but there really is no practical reason you have to do this.
[Nook Color General] Woody:
Done and done. Thanks again.

I do have a question though. When I went to swap out my emmc/external and put it in my PC to copy a file over, I had to reboot for it's contents to show up. I already had my Titanium folder and some pictures in there and after I put my card back in, neither TB nor QuickPic was able to read the External without a reboot. I thought one of the reasons to redo the partitions was so that we could inter-change Micros at will?

Now that I think about it. The CM7 ROM was only able run while a card was inserted. So making the new 4g partition aleviated that hurdle (/sdcard). A reboot to recognize isn't the end of the world, I am just making sure I didn't miss anything. Plus I could probably just mount it to the PC through the NC and do it that was, but it was late and I wasn't thinking straight.

My wife is indebted to you for making this guide. I know the links and zips were others' but this guide made it about as easy as it could be. Even for someone with my experience who tends to do things the hard way so I can learn better (or by mistake).

Now that hers is done, I am off to solve the dreaded ICS Encryption Error bug that is hitting phones world wide. Actually using Rack's Dual Boot gave me the error and a massive clue on the how and why it hits, without ever doing any damage to my wife's NC. But alas that is another story for another thread.

Thanks again,

Wood
[Nook Color General] mr72:
I don't know about Titanium backup or your other app. Really unknown where they are trying to store their files. I have Ti and it doesn't store any info on the sdcard. However, I don't swap my sdcard often. It just has media files on it and that is it. Whole idea was to be able to rip movies etc. on my computer straight to the sd and put it into the NC. Some apps may misbehave, I don't know about that :)
[Nook Color General] Woody:
I think you are missing me here. With Titanium, you can choose where you want it to store your backups (Internal sd, external sd - it is in preferences) and the other, QuickPic is nothing more than a replacement gallery. You can have QP scan the directories you want and not others that you don't, unlike stock Gallery. So i have pictures on my external that she uses and I have QP set up to only scan those directories that I chose.

sidenote: I have found it very valuable to keep my Titanium folder on my removable sd bc if I have it on my internal device and something borks it, all my back ups are gone. With it on the removeable, you can always move files to and fro your PC in case anything drastic happens.

The problem I am see ing that thay say I rip a movie straight to the sd and put it in the NC, it won't show up in my files until I reboot. Not sure why and like I said, it isn't really an issue, just thought it was supposed to be able to swap in and out at will (just mounting in settings).

All is good. She was getting the freezing issue, so I uninstalled BW and checked her governors and all is well for now. Thanks again for your coordination of the files and putting it all together.
[Nook Color General] Explore3:
Are you still using MiRaGe - KANG ROM on your own Nook? Any recent problems?
[Nook Color General] MISRy:
Yes. An update came out just last night. I like it.
[Nook Color General] spenzalii:
Just got my8 NC Thursday night. After playing with the stock setup for about 10 minutes hit the site to find the best way to get CM7 on the NC. After a few false starts, I managed to get this method to work. I do need to double check the memory partition (It looks right, but I'm not sure how it's setting up the 16gb external SD card once it's done) and figure out how to configure the NC. First time flashing an android device (been too scared to try with my Evo Shift) and I must say I'm impressed.

I grabbed the 7.2 build last night. Originally I tried using ROM Manager to install it, but that didn't seem to work very well, so I just redid my boot sd card with 7.2 and installed it from CWR on the NC. I did NOT wipe the data/reset the device after flashing 7.2. Will that be an issue? Only did the flash last night, so I haven't had time to tinker with it yet.

MR72, thanks for the guide!