Barrd-Einar, I recieved the package containing the LX Battery cord last week - a big thank you for your generosity!
What a well thought out accessory! It comes with a 4 foot cord and you simply remove the batteries from your LX and put it in the two cel holder at the end of the cord.
It never even dawned on me that a tripod extension may be needed - depending on the tripod used.
I have a small Manfrotto without a quick release and it is small enough that it doesn't interfere with the cord.
But on another with a quick release, the extender is definitely needed.
Overall another fine accessory for the Pentax LX!