3B1 battery replacement

[Dan Philen]

I think that this question was answered some time ago, but I failed
to copy it down.  Question? What is involved in replacing the 
battery in a 7300 (3B1)? Is it soldered in; what is the replacement
battery; what tricks or problems to watch out for; if its soldered
in then can you put in a battery holder ?
Thanks in advance for any helpful hints.

Dan Philen akgua!dlp