Hi Shane,
It's funny seeing an old thread bumped
The 'little battery box' is a small self-contained drive for EQ1 & EQ2 mounts.
It is a small plastic box with motor and 9 volt battery in it, and it just bolts onto the mount. The mounts come with the bolt already supplied for mounting.
You can get them from Bintel, Andrews, MyAstroShop, AOE, etc. Bintel have them for $49, dunno how much at the other shops.
Here is a pic of mine attached to the EQ1
