Unfortunately, I can only answer your questions for the MarekGibek's image (Glo and Touch), that I use.
Aura HD uses two different images (phj's and angor00's) that may behave differently.
Check the first post.
Quote:
Originally Posted by sambo.
my main questions:
1: How's battery life under Android?
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Comparable (Nickel is a little better), but only if you do comparable things, mainly, only read.
More playing around in Android, less battery life...
Quote:
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2: is it possible/advisable to flash Android to the HD's internal SD card and forgo the Kobo firmware altogether with single-boot into 'droid?
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Of course you can. There are different images for single - dual booting.
Check the first post.
Quote:
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does this require cracking open the case or can it be done over ADB from a command line?
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You
have to open the case, so you can flash the internal SD card.