Jc51373,
The SOCKET MOBILE POWER PACK battery will last a very long time. The Opticis draws very little current. I have had my battery 9 months. I have also seen cheaper lithium batteries 5v on the web.
I have used the Opticis with the Cosecant as well. Is it worth the trouble and expense?
I would ask folks who have a Brick at the AA PC Forum what they think. You may find that the optical USB cable is a waste of money. I purchased it before I had the Mac laptop and used a PC around 60 feet away from my stereo. I still use the PC and control it with a pocket PC.
When dealing with computer stuff, there are many options.
And yes, The Crimson is very special. Gordon is brilliant!
Steve