I love the Logitech mouse. The USB connector is small, which is great on a laptop as it does not exceed much, which allows me to leave it plugged permanently. The ON / OFF button under the mouse saves the battery. I use this mouse for 5 years and the life of the battery (rechargeable in my case) is 6-8 months. Good grip, it is very nice, neither too light nor cheap to manufacture. I recommend!