I recently acquired a Pocket PC which came with e-book capabilities (came bundled with it). It is very slightly larger than a Palm Pilot. I am comparing it to the following points:
Yes, a bit of a problem - I haven’t timed out how long it takes to run it down, but it is sufficient for me to read on the commute to work (I take a train - don’t think I’m driving and reading, please), read for an hour at lunch, and read on the commute home. Hmm… that’s about 2-1/2 hours right there, and I still have 1/4 to 1/2 charge left (depends partly on screen brightness setting). So, it looks like it might meet your minimum. It also has it’s own power cord, so I can recharge at just about any electrical socket. When I went on vacation I took both the power cord and the portable keyboard along with the Pocket PC and together it took up less space in my luggage than a single hardcover book.
It may not meet the higher end of this requirement, but so far it is meeting my needs.
Pocket PC does provide its own light, and it is adjustable. I can read in a dark room (as a bonus, in a real pinch it could function as a weak flashlight) or in daylight. However, it doesn’t compete well with direct, noon time sunlight. Much easier to read in shade than direct daylight.
So far my Pocket PC has endured -10 F in the winter and 90+ in the summer. No, I haven’t left it in the car to bake in the summer time. While there is an ideal range for it, it can clearly operate outside of it, at least briefly. I would not, however, dunk it in either fresh or salt water. Grit will not impair the funciton of the device, but if gets into the ports recharging, hooking up headphones, etc., might get to be difficult. So no, I don’t think it matches your durability requirements.
Ouch! Nope, it’s not cheap enough I’d be willing to lose it.
I suspect they could manufacture a basic level dedicated e-book reader that’s in the $30-$100 range, maybe even less, but they don’t. I do know that dedicated e-book readers only a few years ago were selling for as much as a low-end laptop, and certainly for more than I paid for my Pocket PC (whic really is a computer and in addition to books does games, word processing, spreadsheets, and other applications). The prices will come down. Eventually.
Mine does that.
In fact, when I return to reading it automatically opens the file to where I left off the last time.
I can insert multiple bookmarks in the e-book reader. For items downloaded in html or text formats this is more of a problem.
Mine currently carries a full-length novel and about 30 files of fanfic and other reading files.
It also has two games installed, a copy of my pilot log book, my address book for family and friends, and a bunch of jpg’s and sound files. And it’s slightly smaller than most of my paperbacks.
I find that I can read comfortably on it for quite awhile IF I adjust the screen. Partly this is because instead of sitting in one spot in front of a desktop PC I can change seats, read lying down in bed, etc.
As a bonus - the docking cradle allows you to back up everything. So, even if it was damaged, destroyed, or lost I would retain the information and could load it onto a new Pocket PC.
All that said, I still like paper books.
I think e-books have a place and role to play, and so do the paper books. As much as I enjoy the Pocket PC, as much as I use it to read on the go, when I’m at home I prefer paper-based books. Maybe it’s habit. Maybe it’s the heft of the object. Maybe it’s that for some things a larger format page is better. And there’s no question that for sand, rain, water, grease and other material insults the paper books are still more durable. And still cheaper.