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Old 06-22-2011, 02:05 AM   #1
spyrule
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Battery Life?

I read a forum posting (here) which provided the steps to disable the cell phone service and telephony for the Nook Color. This, ostensibly, should help the life of the battery.

So, it seems to me that doing this for the touch seems like a good idea. But, my question is, am I just being paranoid? I'm new to the whole android thing.

If I'm not being paranoid, are there other steps that can be taken to lengthen battery life?


This is the code I'm using to disable the Phone and Telephony services:
Code:
adb shell mount -o rw,remount -t ext2 /dev/block/mmcblk0p5 /system
adb shell mv /system/app/Phone.apk /system/app/Phone.OLD
adb shell mv /system/app/TelephonyProvider.apk /system/app/TelephonyProvider.OLD
adb reboot
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Old 06-22-2011, 03:08 AM   #2
Oogami
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For the touch, there's already a way to turn off the WiFi, same with the NookColor.

Also the Touch has a ridiculous battery life, I was reading a manga for 6+ hours one day and the battery dropped about 10%. So that's about 10 days of heavy reading.

With manga, page turns are much faster, since there's less text to read. That is with WiFi turned off btw.

So assuming you're reading a book, where each page turn will take longer, you'll have at least a month of battery, even for a heavy reader. So honestly, don't even worry about the battery for the Nook Touch. The only thing you should really do is turn off the Wifi, no hacking required.
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Old 06-22-2011, 08:37 AM   #3
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I second what Oogami said - just turn off the WiFi on the Touch.
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Old 06-22-2011, 09:59 AM   #4
spyrule
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Quote:
Originally Posted by Oogami View Post
For the touch, there's already a way to turn off the WiFi, same with the NookColor.

Also the Touch has a ridiculous battery life, I was reading a manga for 6+ hours one day and the battery dropped about 10%. So that's about 10 days of heavy reading.

With manga, page turns are much faster, since there's less text to read. That is with WiFi turned off btw.

So assuming you're reading a book, where each page turn will take longer, you'll have at least a month of battery, even for a heavy reader. So honestly, don't even worry about the battery for the Nook Touch. The only thing you should really do is turn off the Wifi, no hacking required.
Thanks, Oogami! You really helped to put things in perspective.
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Old 06-22-2011, 11:10 AM   #5
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@spyrule, Your first post in this thread mentioned cellular radio possibly on a rooted Nook as opposed to the other two guys talking about WiFi on a non-rooted Nook. Two VERY different things. If your Nook isn't rooted the battery life is probably going to be good. If you rooted it, then there is a chance the battery life will be much shorter. The nookcolor I owned had good battery life when not rooted and like a lot of others it had terrible batery life when rooted, so the Nook Touch might act this way as well. I suspect it will as Android was obviously designed for smartphones and the patched up 2.x they put on tablets and readers is not that good on same. Some of the so-called rooting experts continue to state the nookcolor shouldn't drain battery for a non-existent cellular radio, and yet it darn sure appears to. What ever the reason, a rooted nook often leads to excessive battery drain according to posts all over the web.

Last edited by jswinden; 06-22-2011 at 11:13 AM.
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Old 06-22-2011, 02:13 PM   #6
spyrule
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Quote:
Originally Posted by jswinden View Post
@spyrule, Your first post in this thread mentioned cellular radio possibly on a rooted Nook as opposed to the other two guys talking about WiFi on a non-rooted Nook. Two VERY different things. If your Nook isn't rooted the battery life is probably going to be good. If you rooted it, then there is a chance the battery life will be much shorter. The nookcolor I owned had good battery life when not rooted and like a lot of others it had terrible batery life when rooted, so the Nook Touch might act this way as well. I suspect it will as Android was obviously designed for smartphones and the patched up 2.x they put on tablets and readers is not that good on same. Some of the so-called rooting experts continue to state the nookcolor shouldn't drain battery for a non-existent cellular radio, and yet it darn sure appears to. What ever the reason, a rooted nook often leads to excessive battery drain according to posts all over the web.
Great info, jswinden! My nook touch is rooted, and, as you said, it seems that there is a fairly considerable difference in battery life after rooting. Disabling phone and telephony services does seem to have improved the battery life. But, as I only disabled them about 24 hours ago, I'm not sure.

Are there recommendations to improve battery life that you have found useful?

Thanks!
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Old 06-24-2011, 01:49 PM   #7
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Quote:
Originally Posted by Oogami View Post
Also the Touch has a ridiculous battery life, I was reading a manga for 6+ hours one day and the battery dropped about 10%. So that's about 10 days of heavy reading.
is the battery life of the Touch ridiculous or reading PDFs/image heavy documents in a e-reader ridiculous?

Let's recap E Ink tech: it only wastes power on "page turns", not to maintain them. Page turns here means any change to the screen: page turns, obviously, but also the menu showing up and panning and scrolling around a PDF/image. E Ink is meant for static content: you read a page for 1 minute, then do a screen refresh. Constrast this to LCD where the screen refreshes 60 times a second. Can you see where the power saving comes from?

So, if your reading usually involves panning around PDFs and comics, you're doing several "page turns" per second, even though it's the same "page" you're reading.

so, give me plain rich textual fiction to me...
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Old 06-24-2011, 05:48 PM   #8
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Quote:
Originally Posted by Namekuseijin View Post

So, if your reading usually involves panning around PDFs and comics, you're doing several "page turns" per second, even though it's the same "page" you're reading.

so, give me plain rich textual fiction to me...
Panning is not a capability that Nook STR has at the moment, so that is not the issue here. However unlike text-only pages, any page with images on it forces a full page refresh, which is going to use a little more power than doing it every 6 pages as with text.

I am curious about what manga is referenced here, since Nook STR doesn't have a picture viewer as such (or does it?). B&N sells some books in the 'manga' category but I assume those are ePub files.
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