Hey JN:
I'm currently using a Toshiba Tecra M7 tablet PC (Wacom tablet w/upgraded wacom drivers). and I love it.
Did a quick google for the product you're interested in and came up with microlight.com. My real question is why does the pen require a battery?
As Wacom is, really, the industry standard, none of their tablets require battery power as their technology isn't built that way. Other than that, you just need to make certain that the drivers that come with the product are supported by your operating system (Win XP, Vista, etc.).
Oddly enough, Win XP Pro & Media center have had built in drivers for wacom, and similar, products since service pack 2. The same holds true for Vista home pro and ultimate.
During my quick search for this tablet I also found this thread:
Mangaworkshop - Amateur Manga Artist Community :: View topic - The famous Tablet theard.
Here it's mentioned that Wacom has a refurbished products store where you may be able to pick up a deal.
Good luck
cap