Well, looks like I goofed thinking Mrs_Often had a sleepcover -so that probably rules out it being specific to the hall effect sensor or only entering sleep that way, but I guess the rest of the theory seems to be holding up, at least as it applies to the Glo.
I do think the sleep covers with pockets or flaps might exacerbate the problem by almost ensuring the IR above the screen would be interrupted before sleep could be completely entered merely as a mechanical timing issue when closing the cover to begin sleep as the pocket or flap would be, or nearly be, in position to interrupt the IR before the magnet is in position to force sleep mode.
As to the Touch, I did allude to the possibility of there being more than one possible excessive drainage situation. Most times I've read of people experiencing it with the Touch, it was blamed on a "bad" epub... I'm not saying that answer is correct, or in any way well defined, but people have presented it before. Perhaps there is some other issue where despite appearing to enter sleep mode excessive current is drawn by some internal process(es) not shutting down. Fortunately, I've been lucky with both Touch and Glo and experienced the problem with neither unit. I do almost exclusively sideload through Calibre, but can't offer that as any more than anecdotal evidence of perhaps how to avoid it.
Answers would be great, but there is a reason they call it "fishing" and not "catching."
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