Daffodil WMS217R Wireless Optical Mouse / Wireless Mouse - Computer mouse with 3 buttons, wheel and DPI (PPP) 800 - For Laptop / Notebook / Desktop - Compatible with Microsoft Windows (7 / XP / Vista) and Apple Mac (OS X +) - Powered by 2 AAA batteries (included) (Electronics)
Lasts a little longer than some models prices first before changing the batteries. That said, this type of article is more expensive than buying batteries. If wireless is not essential, opt for a cheaper wired version