ORIGINAL: Minnreefer
I just saw one in use yesterday, looks very nice and slick. The guy who has it has a ton on the 18v batteries for his tools, so he just uses those batteries. I may have to get another drill with one of those lith batteries.
It looks like he just has the adapter for Makita at the moment, I wrote to him and asked if it would fit (my) DeWalt batteries, it looks like the same type of connection. I'll post what he says if/when he gets back to me. There is a better picture of the adapter on page 125 of Model Airplane News, Dec edition.
PS: Some of the tool manufactures are offering a Life Time warranty on the 18 volt LiPO batteries too.