Alas, I am being thrust into the market for a new ebook reader

My beloved Sony PRS 505 ebook reader that I purchased in July 2008 appears to have had a stroke. I think its issues are battery related. This ebook reader has always had very good battery life, allowing me to read for 1 or 2 weeks between charges, but now I can't even turn it on.

The trouble with my Sony PRS 505 started last week when I wanted to add a new ebook. I connected it to my computer with the USB cord, but the ebook management software gave me an error instead of displaying a success...