It's for my laptop and I was looking for something along the lines of the ASUS MS-71, but bigger. The ASUS is smaller than two fingers (or one... if you're special), so I don't see how it could be very comfortable to use. I've seen the Kensington Ci75m, but it doesn't charge the batteries while in the mouse. The only function the wire serves is that you can have power from the laptop while your batteries are charging elsewhere.

Any help is (as always) greatly appreciated.