http://www.mouser.com

cr2035 with solder tabs,

please don't try to solder wires to a lithium cell,

lith dude..

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.