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Old 09-04-2014, 10:19 AM   #4
GerZah
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GerZah began at the beginning.
 
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Join Date: Sep 2014
Device: Kindle 3, Kindle DX
Hi, sorry for unearthing such an old thread, but as I stumbled across the very same problem and found this thread via Google, I'd like to add what worked for me:

The problem seems to be a energy saving bug in software version 2.5.8. Once you use 3G, and even it you deactivate it, it will still drain your battery, leading to a "Battery Critical" in less than a week.

What seems to work is: After switching off 3G, reboot the DX, and it will hold its battery level for a long time.

... I wrote this down in a blog post as well (both in German and in English).
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