I banged my head on this issue for some time and want to get this on here for the archives for future knowledge. I read some posts about putting a battery clip on and I went to mouser and spent a good deal of time looking at batteries and clips and figuring out what to use. Here are the part numbers from mouser www.mouser.com
Once the clip is soldered then battery replacement is easy.
With the new battery in everything sounded much more open, like a spring day. Every detail came out in the reverb tails. Ok thats all bs but the battery works