Quote:
Originally Posted by Jadon
You can't get twenty hours on a portable DVD player when playing DVDs, but you're powering the drive, which is a huge cost, and you likely have the backlight on higher for a film than you would for text. Decoding video also has to be costlier in terms of power than displaying text, but that may not be a big deal. If such a device could be used for ebooks you're probably talking about getting three or four times the usage on a charge. Maybe not 20 hours, but quite possibly 8 or 10.
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Seems to be the screen that's the biggest battery drainer, rather than the drive, at least for a hard-disk based unit. Eg, I have an Archos media player. It will play about 4h of movies, but about 20h of MP3 on a battery charge, the difference being that the screen is blank while it's playing MP3s.
I would imagine, though, that a DVD drive probably requires more power than a hard disk.