Here you go http://www.mods.dk/view.php?ArticleId=3053 It is a common
battery that should be available at Radio Shack. Might even find it
at Wal-Mart.

Dick - W6CCD


wrote:

I think the lithium battery is dead in my 731 since the memories are
gone after I turn it off and back on after awhile, do you know what
kind it is, and where to get one? The only radio stores here are radio
shack.

Thanks in advance.