Kensington Ci25m Notebook Optical Mouse Review

by Reads (9,394)

by Niki Breese

Touchpads and pointing sticks just aren’t as easy to use as a mouse, so a mouse will continue to go along with portable notebook computers for the ride. With wireless mice seemingly taking over the portable market, and taking into account my previous bad luck with that breed, I’m happy to see a low-priced corded mouse like the Kensington Ci25m on the market.



  • Retractable cord extends to 30"
  • DiamondEye Optical sensor
  • Comfort grips for hours of comfort
  • Available USB port ; PC/Mac compatible
  • Dimensions: 3.5"L X 1.75"H X 2.25"W

The Ci25m Notebook Mouse in package (view large image)


Front side view (view large image)

Back view (view large image)


The Kensington Ci25m Notebook Optical Mouse is a simple, corded mouse with a standard three button layout and a curvy design. Retailing for only $19.95, the cheap plastic feel is not surprising.  The plastic is  a dolphin gray color overall with seamless charcoal buttons and grips down the sides. The buttons appear as one, lending a little style, although they click separately with a loud, dissatisfying “thunk”. The buttons have a soft rubbery texture that ensures a good grip when sliding the mouse around, even if your palms get sweaty. The center scroll button is also rubberized with a tire-like track. Running down each side are additional dimpled rubber grips.


(view large image)

The Ci25m is neither a tiny mouse nor is it a full sized specimen. For my small hands, it is a comfortable fit. But for those with big hands and long fingers, the size of the mouse proves irksome to use. I passed it around to my predominately male classmates who all complained about the size.


(view large image)

The Ci25m has a cool marketing name for its optical sensor: DiamondEye. For such a low-priced mouse, it is accurate on most surfaces except glass of course (optical mice cannot track on glass). I have tried paper, a wooden desk, plastic lab tables, jeans, my cat’s back, and the palmrests of a Dell Inspiron. The scroll wheel has a smooth feel to it making scrolling an easy maneuver.


Ci25m with cord extended (view large image)

The main feature of the Ci25m is its 30” retractable cord. The cord of the Ci25m is a bit restrictive and could be longer. It also has a tendency to curl and get in the way. To retract the cord you have to give it a tug and it then winds back into the mouse. The Ci25m is a true plug and play device and comes with no software or driver CD. Kensington’s Mouse Work software is available on their website, but I have not tried it out.


  • Cheap at $19.99
  • Corded Reliability
  • Works well on many surfaces
  • Does not need batteries


  • Short Cord
  • Unsurprisingly cheap feel
  • Unsatisfying buttons
  • No software included
  • No drivers included in case of problems



All content posted on TechnologyGuide is granted to TechnologyGuide with electronic publishing rights in perpetuity, as all content posted on this site becomes a part of the community.