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Old 11-22-2011, 07:16 AM   #1
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Exclamation Too much battery drain after rooting - solved!

Just a note to all rooters: in case your battery drains too fast after rooting, try the following:

1.) Connect charger
2.) Use Root Explorer to delete /data/system/batterystats.bin
3.) Power of and let the unit charge over night

From now on, the battery will be re-calibrated... may take 2 or 3 charge cycles...


In general it is better to flash the T1 with a fully charged battery only.


Also, there is an app that automatically shuts down unwanted processes when switching to stand by: http://www.androidpit.com/en/android...d-Task-Manager


...may help conserving battery because some apps are able to wake up the device and so some stuff (check for updates, etc.)
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Old 11-28-2011, 04:10 AM   #2
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Can't download the app. Could you please send me the apk? Thanks.
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Old 11-28-2011, 06:25 AM   #3
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http://wiki.mobileread.com/wiki/PRST...ing_and_Tweaks

Please also help to update the wiki.
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Old 11-28-2011, 08:30 AM   #4
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http://wiki.mobileread.com/wiki/PRST...ing_and_Tweaks

Please also help to update the wiki.
The link in the Wiki to the advanced task manager doesn't work
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Old 11-29-2011, 01:55 AM   #5
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The link in the Wiki to the advanced task manager doesn't work
The link is working for me.
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Old 11-30-2011, 03:55 PM   #6
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I followed the steps but charged it in my computer for the night. Now I switched it back on and it says low battery.
Maybe my computer didn't charge it.
Do you think it's okay that I turned it on? Have I damaged anything?

I am thinking of charging it with the wall charger overnight and only then switch it back on. Do you think it will solve the problem?
Or should I undo the root, fully charge it and then root again and delete the battery file?
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Old 11-30-2011, 06:43 PM   #7
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double post won't help!

continue here: http://www.mobileread.com/forums/sho...65&postcount=9
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Old 11-30-2011, 09:40 PM   #8
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Quote:
Originally Posted by NatP View Post
I followed the steps but charged it in my computer for the night. Now I switched it back on and it says low battery.
If you left it connected to your computer overnight and the computer went to sleep or enter hibernate it is possible that your battery will drain.
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Old 12-06-2011, 12:04 PM   #9
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Maybe the root image and/or rescue image contain data of a not fully charged battery? Who knows in what state the Reader has been when the developer backed up the system? Even worse, if that's true, you can't re-initialize the rescue image's battery data because you don't have android access.
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Old 12-06-2011, 06:46 PM   #10
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Maybe the root image and/or rescue image contain data of a not fully charged battery?
The root set is not based on a disk image (mostly just some files that are added), but the restore set is, so indeed there could be a problem there. Probably best if that battery file were just removed from it. Simple enough if you have a working Linux system, otherwise a bit more difficult.
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Old 12-07-2011, 10:10 AM   #11
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Simple enough if you have a working Linux system, otherwise a bit more difficult.
Hav you ever tried http://unetbootin.sourceforge.net/ or http://www.virtualbox.org/ ?
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Old 12-08-2011, 07:54 PM   #12
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I think that I looked at the first, so that I could replicate what it did from NetBSD (which is my preferred OS).
The second, I sometimes use that for testing.
But I do have a dual boot including Linux on my laptop, so I have a Xubuntu on hand when I need it.
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Old 12-22-2011, 06:01 AM   #13
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Is it better to charge the battery before deleting batterystats.bin?
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Old 08-28-2012, 06:36 AM   #14
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"Also, there is an app that automatically shuts down unwanted processes when switching to stand by:"

The link above works - but the app is not there to download.

Are we still advised to install it, or something similar?

I ask as I have recently rooted and feel unsure about my battery drain.

Tony
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Old 08-29-2012, 04:36 AM   #15
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An update to say I did the bin removal action yesterday.

Today I am still seeing 100% after an overnight rest. Previously I never saw more than 95%. The work round seems to have worked.

However, I'd still like to run that apk to kill unwanted processes if anyone can find it, please.

Tony
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