This looks pretty neat - it has a nano receiver, and 8 months battery life. It also comes with a 3 year guarantee.
Free delivery to store, and free home delivery if you spend over £30.
The Microsoft Wireless Mobile Mouse 3500, featuring the revolutionary Microsoft BlueTrack technology, combines the power of an optical mouse with the precision of laser for remarkable tracking on virtually any surface.
This compact wireless mouse also has everything you need to stay connected while you’re on the go. Its nano transceiver can be left plugged in when you’re on the go or stowed in mouse itself.
The Microsoft Wireless Mobile Mouse 3500’s 2.4 GHz signal and optical 1000 dpi sensor let you work confidently and comfortably at home or in the office.
Use your mouse without power interruption for up to 8 months on a single battery and feel free to use the on/off switch - you can conserve more battery power by turning your mouse off when not in use. For left- or right-hand use.