I would say that its battery life is roughly 4 books (assuming the books are 300-400 pages).Which depending on your reading speed could take 2+ weeks to do. I would say I am recharging it overnight at least once a week. Though to be fair I usually download new books onto the Cool-er a couple of times a week.
I think an estimate of 2000 page turns is reasonably accurate, if you count changing screens while selecting the book etc. I do not think 8,000 is anywhere near what it is, maybe if you only have one word of text on the page.
Amy