I don't know anything about the FastTrack, but it looks interesting and inexpensive, making it hackable.
You should be able to easily find a USB external pack for it, or can make one readily.
USB Power is Pin 1 = 5vdc and Pin 4 = Ground
some more here:
http://pinouts.ru/Slots/USB_pinout.shtmlHere's Wikipedia on USB power:
http://en.wikipedia.org/wiki/USBPowerThe USB specification provides a 5 V (volts) supply on a single wire from which connected USB devices may draw power. The specification provides for no more than 5.25 V and no less than 4.75 V (5 V±5%) between the positive and negative bus power lines.[8] Initially, a device is only allowed to draw 100 mA. It may request more current from the upstream device in units of 100 mA up to a maximum of 500 mA.
If a bus-powered hub is used, the devices downstream may only use a total of four units — 400 mA (i.e. 2 watts) — of current. This limits compliant bus-powered hubs to 4 ports. The host operating system typically keeps track of the power requirements of the USB network and may warn the computer's operator when a given segment requires more power than is available.
On-The-Go and Battery Charging Specification both add new powering modes to the USB specification.
Some USB devices draw more power than is permitted by the specification for a single port. This is a common requirement of external hard and optical disc drives and other devices with motors or lamps. Such devices can be used with an external power supply of adequate rating; some external hubs may, in practice, supply sufficient power. For portable devices where external power is not available, but not more than 1 A is required at 5 V, devices may have connectors to allow the use of two USB cables, doubling available power but reducing the number of USB ports available to other devices.