Sega Dreamcast Zip Drive

Sega Dreamcast Zip Drive w/System

Then this morning I was looking through a bunch of random projects on Mod-Retro, and then it came to me.
A rechargeable battery back, that attaches to the bottom of the Dreamcast, just like this Zip Drive, and plugs into the back of the system where the AC adapter plugs in, and has re-routing for the a/v cable and serial port.
I was also thinking that the original AC Adapter cord would be the charger cable for the rechargeable battery pack, allowing you to plug it into the system and play plugged in at the same time as charging, as well as making it so you didn't need to have like 10 different cables and blah blah blah.
Though I was thinking it would be a lot smoother, and fit better onto the bottom of the system, maybe even have a cooling fan built in as well.
What do you think?