WOT? No Arc Mouse
I'd be the last person to sing the praises of Microsoft, but their Arc mouse is pretty much the ideal laptop/notebook wireless mouse (if you typically use your laptop at a desk/table and do mouse heavy work on it) , imho.
The integrated, magnetic USB dongle hold incorporated in the folding "tail" is inspired. As is the folding "tail" itself. When folded, the mouse s about 60% of it's "full" size and is switched OFF, preserving the life of the regular AAA batteries that it takes.
When fully opened it's not much smaller than a typical desktop mouse, but due to the "arc" form factor, it is much lighter.
Not a great desktop mouse, but as a laptop mouse it doesn't suffer from the "too small to be comfortable for extended periods" problem that most such devices do, whilst still being small enough to be tossed in a bag or even in a pocket when you are moving from one location to another with your laptop.
The only way it could be improved for me would be if it were to be a BlueTooth device rather than requiring a USB dongle. But my biggest gripe with dongles is keeping them together with the mouse itself, and the neat magnetic caddy in this one mitigates that to a large extent.