During those 10 years I have never needed to change the battery despite intensive use of light and alarm. On the front there is also written that the battery is guaranteed for 10 years.
The display is very well arranged, clear, legible, and most of the information is obvious from a glance: time + date + day + the name of the year are displayed at the same time on the screen without having to press buttons for access.
Unlike other Casio, it has the advantage of a reasonable size in addition to being quite fine. It is extremely light, very comfortable to wear.
