Hi Vincenzo,
Based on the Application Note AN092 and measurements I have performed with full payload you could count on:
- Broadcasting Interval: 1 seconds => 269 days on a CR2032 battery
- Broadcasting Interval: 4 seconds => 993 days on a CR2032 battery
With smaller payload you could easily add 30%++ of battery life.
Have a look at Application Note AN092 to do your own approximation.
Best Regards