These are non-rechargeable. Somewhat easy to replace Might be easier to have a dealer do it if you have qualms. They're like or may be lithium batteries similar to the ones in desktop machines. Here is a guide to installing the pram battery if you want to do it - http://www.pbfixit.com/Guide/31.3.1.html ========================= Mike Amato mailto:cantab at comcast.net > From: "Brian L. Matthews" <blm at blmatthews.com> >> Possible internal onboard dead battery. > Thanks for the info. Will it recharge on its own or will I need a new > battery? I've got it plugged in so I guess I'll find out on my own. > Brian