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Old 12-27-2010, 09:09 AM   #1
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Improve battery life: rooted nook color
I found this today and applied it. It is supposed to significantly improve battery life on a rooted nook color by disabling the cell phone standby service from running (not sure why B&N left it on since this isn't a phone). I haven't had any ill effects since applying it.

http://forum.xda-developers.com/showthread.php?t=888216
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Old 12-27-2010, 09:34 AM   #2
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I was going to try it until I saw this:

http://forum.xda-developers.com/show...3&postcount=36

I disabled automatic updates. It seems like renaming the two files for the batter life thing causes problems if you've done this.
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Old 12-27-2010, 10:01 AM   #3
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You know the old saying, "Hey y'all, watch this!" I can report that I'm able to select 'Library' and open books with no issues. But, I haven't tried to use 'Shop', didn't disable OTA Updates, nor did I run the cellphone script. I used Root Explorer and renamed Phone.apk and TelephonyProvider.apk manually.
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Old 12-27-2010, 10:03 AM   #4
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Battery Life
I actually deleted the two files (using Root Explorer) when I first rooted. Absolutely no ill effects over a period of several weeks and, I believe, a lower battery usage.

One problem you might see is that any of the battery reporting apps don't understand that there is no cell activity - for example "Android System Information" continues to report a "cell phone idle" statistic even though it's meaningless. I did notice that before I deleted the two apps, this statistic used to be about 10% - now it's running about 4%
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Old 12-27-2010, 10:27 AM   #5
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Has anyone disabled automatic updates? I'm not willing to give that up.

If someone has disabled automatic updates and renamed the two files phone files with no ill effects I'll give it more consideration.
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Old 12-27-2010, 10:56 AM   #6
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Has anyone disabled automatic updates? I'm not willing to give that up.

If someone has disabled automatic updates and renamed the two files phone files with no ill effects I'll give it more consideration.
I have automatic updates disabled. I tried the B&N store right after I did this and I was able to download and read a free book. I also was able to read from my library with no problems. It seems like the person who had the problem used a bad script to disable automatic updates from what I read.
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Old 12-27-2010, 11:08 AM   #7
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Great! I'll give it a whirl (after I backup again).
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Old 12-27-2010, 11:10 AM   #8
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Use Root Explorer To...
Rename the Otacerts.zip to Otacerts.zip.old and you are good to go - no script needed! And no update either.
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Old 12-27-2010, 11:12 AM   #9
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Rename the Otacerts.zip to Otacerts.zip.old and you are good to go - no script needed! And no update either.
That's been done weeks ago. Well, it seems like weeks ago.
Last edited by SCION; 12-27-2010 at 11:14 AM.
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Old 12-27-2010, 12:00 PM   #10
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so all I have to do is rename three files?
Octacerts.zip, Phone.apk and TelephonyProvider.apk
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Old 12-27-2010, 08:10 PM   #11
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I have my rooted NC and I haven;t turned off any automatic updates. However, I haven't noticed anything changing in my NC over the past couple of weeks. I am assuming the update came through.
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Old 12-27-2010, 08:25 PM   #12
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Rename the Otacerts.zip to Otacerts.zip.old and you are good to go - no script needed! And no update either.
Actually several reports from XDA said that despite making such changes, the 1.0.1 update took place anyway. That is not good. Guess I will make the change anyway

http://forum.xda-developers.com/show...=876591&page=9
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Old 12-27-2010, 08:31 PM   #13
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Actually several reports from XDA said that despite making such changes, the 1.0.1 update took place anyway. That is not good. Guess I will make the change anyway

http://forum.xda-developers.com/show...=876591&page=9
I haven't received the update yet and I made the change. Also, I "Shop" on a regular basis. Nothing has been triggered.
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Old 12-27-2010, 10:19 PM   #14
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I haven't received the update yet and I made the change. Also, I "Shop" on a regular basis. Nothing has been triggered.
Ditto, no update yet.
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Old 12-27-2010, 11:48 PM   #15
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Maybe you guys can post up some screenshots of your energy usage for comparison. If you're rooted, go to:

App Drawer -> NookColor Tools -> All Settings -> Battery Use
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Click image for larger version Name: Nook Color Battery Usage.jpg Views: 428 Size: 111.8 KB ID: 63682  
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