over 20 hours easily so far and have not even lost a bar on the batt meter yet :-) I figure I should get at least 6 months to 8 months on a charge and most of that will be standard battery self discharge.
I might run it dead a few times a couple times a year by playing mp3's JUST to exercise the battery a bit (since that too can kill it) or with some audible books (I convert all of them to mp3 anyway so it should work fine though not sure if I can bookmark an mp3 in the reader ? guess I will have to try it and see what happens.
I really wish they had stuck with AAA's 3 AAA cells could have fit inside there without making it ANY bigger. real pitty.
Chris Taylor
http://www.nerys.com/