Ferrari Alarm & Immobilizer when battery is empty

For leaving the car for a long period of time e.g during vacation, I need to disconnect the battery. But if I do it while the car is locked with the lock button on the key, alarm starts immediately after battery is disconnected.

1 - Is there a way to keep the alarm running properly when main car battery is disconnected?

2 - What happens if the car battery is normally connected but then gets empty over time e.g when I'm on vacation but forgot the car. Does the alarm still trigger at a random time as the battery gets empty?

3 - How long does the alarm continue the sound it makes when car has no battery? Since the car is in the garage with other cars, it is a bit of an embarrassment with the neighbours around.

4 - What happens to immobilizer which requires the key to be present? If I disconnect the battery without locking the car (locking only using the physical key not with the lock button) and then if somebody opens the door can they start the car easily? (assuming they connect the battery by opening the hood)

5 - Is there a way to disable the alarm permanently (but not the immobilizer)? So that I can keep the doors locked before disconnecting the battery.

I see there is a satellite alarm option but I don't have it. I'm just talking about the standard one.