Olimex LPC2103H Break V2
Check this out. It has the CR2032 Battery and MCP2200 USB to UART on board. As well as full breakout.
Its USB Powered and if ready for COM action. Also now i have 4 VCC and 4 GND pins broken out for use.
VCC is 3.3v.
Here are some pictures… Note: There are no broken traces in the picture. If it looks broken its because of hot glue trail.