Here's the link to 3racing Mirco-T parts:
http://www.3racing.com.hk/x_search.jsp
It does not give a lot of details about how it holds the battery, but it does look like a large area for different batteries.
Here's the Exo-T
http://www.ripper7racing.com/r7rforu...read.php?t=788
and the New Micro-T CF chassis
http://www.ripper7racing.com/r7rforu...read.php?t=563
I don't see how the batteries are held in here though
but they do look great.