I've been curious about this. It is a tiny waste of energy to blank the screen when it sleeps (and restore the page again). Seems like it should have been just a key-lock mode where the screen is unchanged. Unless Sony figured people would be confused by the key-lock with no display indication? Somehow every Ipod user manages to deal with its key-lock switch.
Unless there IS power consumed to maintain the e-ink page, not what I was led to believe.
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