As someone who doesn't own an e reader but rather the kindle fire (cyanogfen 11 nightly) and a nexus 4, I can't understand why someone would complain abnoiut a battery that lasts over a week.
A regular Kindle (paper-white) lasts for about a month with regular usage (few hours a day). Even with critical battery charge you can skip a day or two until you get around to charge it. Once you get used to that behavior charge time of once a week becomes very annoying. Tablets/Phones and eBook readers are completely different device categories when it comes to battery life.
i'm complaining because the UI tricks me into "couple days" mode by not turning off radio when i tell it to update my library while the radio was off.
it would be perfect if radio off, i press update, it turns radio, update, turns radio off again.
i would get my journals and week long battery.
as it is, if i wont watch it update to the end (which is slow as hell, couple minutes often) and do the boring procedure to turn radio off manually again (menu > options > etc) i will have a few days instead of a couple weeks.