Hare are some pictures of the battery pack I made for my R09hr.
Started with two of these...
http://www.radioshack.com/product/index.jsp?productId=2062241These holders configure two cells in series so each pack gives three volts.
The two packs were then wired in parallel. From what I gather a alkaline
D cell is about 15000 mah so this pack should have a capacity of
30,000mah @ 3vdc.
The two holders gaffer taped together, the wires are soldered and wrapped with shrink wrap.
the two holders with batteries installed
a little tape to hold them in
The battery slugs, made from nylon, drilled and tapped on the end for a 10-24 machine screw. Not that the positive battery screw was filled down so that it would fit into the slot in the R09hr, this polarizes the batteries so that they cannot be put in backwards. The wire are attached via standard hoop sta-kon crimp connectors. I machined the nylon to size in a lathe, but you could easily make something similar with wooden dowls and wood srcrews.
Side view of slugs
Installed, I then put a few pieces of gaffers tape over them to hold all in place. I thought about getting a second battery cover from edirol and modifying it so that it could be used to hold the slugs in and have a place for the wires to exit.