Why not give a more revealing estimate of the battery life. Like 30 hours of continuous reading.
Because I don't keep track of how many hours I read a month, and because when the technology becomes good enough that one almost never has to recharge then it's time to start thinking about the problem in a totally different manner. Charging just isn't in practice an issue on a Kindle -- except that it happens infrequently enough that one has to ask: "Dang, now where did I leave that charging dongle?"
Like I said I read often 4-5 hours at time. So that would give me only about a week of reading.
Not necessarily true. You might find that the Kindle gives you two or three weeks of reading. Again, reading takes almost no power on a Kindle, it may be the other stuff that the Kindle does that consumes the power, in which case the amount of time the charge lasts still has little or no correlation to your "hours of reading per day metric." For example if I go a month or two without using a particular Kindle at all, I may well still find that it has discharged its battery "doing other stuff" even though I've been reading it "zero hours a day."