Yes, since it is wireless it requires two AAA batteries and with this auction it has brand new batteries in it. Just FYI - Almost all wireless computer accessories require batteries since they are not connected to the computer or any other power source.
What is a good idea to do in order to save battery power, there is an On/Off switch on the bottom of the mouse and when you're done for the day or whatever, you can just turn the mouse off and it won't consume any more of the batteries. That's what I always do anyhow. :) Hope that helps!
This mouse does not come with any install discs as it does not require any installation and it didn't even originally come with one anyways. As long as you have an extra USB (Preferably USB 2.0) you computer should automatically find it.
I would be very, very surprised if it required any drivers as most OS's now will recognize these types of accessories automatically.
Even though the shipping is only 3 dollars, I still have to buy packaging in order to send this, so I can think about it I guess depending on how many credits get offered. This mouse has barely been used for almost merely a month and I ordered it from one of my drop shippers and even the $3 for this shipping hardly covers that... So. What how may credits are you thinking about offering? ;))