Years ago before marriage and family, I was a road warrior. Now, I still travel some but I finally ditched my full-sized laptop for an ultra-portable tablet.
When I travel, I never bring a mouse because it is just another piece of equipment to carry in an already overloaded bag. This is where MoGo rocks. This mouse just sits inside your laptop PC card slot, which is how you charge it. The initial installation is very easy -- you just pair the mouse with your internal Bluetooth and you are ready to go.
Note: On newer laptops, they have an express slot MoGo available.
I've included a few pictures of the MoGo mouse. If you are interested in one, take a look at their product line.