The one thing missing here is the new battery, which from Sony costs more than a new player! The closest fit to the size and capacity that I could find came from www.batteryspace.com product number PL-544792-1C
<http://www.batteryspace.com/Polymer-Li-I...>
Size: 5.4mm x 47mm x 95mm
with minimum 2500 mAh
I paid $8.50 each plus shipping for a total of about $23.
Carefully pull the coverings off the original pack and remove the tape over the connections. The wires to the tabs should come off with enough heating from a soldering iron. Those wires can then be soldered to the tabs of the new cells. Then cover up the connections with electrical tape and wrap the covering around the new cells. It fit back in the case perfectly, and works great. I'm just passably handy with a soldering iron, so it took me a good 60-90 minutes to carefully take the battery pack apart, resolder, and reassemble.