troykm
You should get several years out of it, depeding upon how often you recharge. If you do have it past the end of the battery life it looks easy to replace. There is a teardown of the Kindle 2 here:
https://www.mobileread.com/forums/showthread.php?t=42203
And I found a source for the battery here:
http://www.batterytrader.com/amazon-...e=URL_LANGUAGE
Hope that helps.
C.P.T.