The CHIRP

I am the new owner of a 2014 Prius V. The honeymoon has been uneventful up until the chirp started yesterday. I feel like an idiot asking this but here goes. It’s an intermittent chirp, when the car is parked or driven. It sounds like the last cries of a battery dying in a smoke detector. It seems...kid you not.,, to be coming from the overhead cabin light but sounds are deceiving. I removed my spare cellphone and my toll transponder because they have batteries. The chirp persists.
I’ve even looked in the manuals but there is no reference to a chirp as a warning.I’ll take everything out of the trunk.
Please help.... is this a Prius thing??
Thank you in advance.

 

Could be but I don’t see anything which
Seems non original.

 

Wow... interesting guess! The fob doesn’t make the noise inside my house but I’ll check if I hear the noise when the fob is not in the car.

 

Not the fob. It really seems to be coming from one of the overhead lighting fixtures. Is there any tool or sensor which can pinpoint this kind of thing? Or do I have to take it back to Carmax before the warranty expires... not looking forward to that. Maybe I’ll take it to my trusted mechanic first.... at least she’ll believe me.

 

Solved. If it quacks like a duck or chirps like a dying battery..,,
Several weeks ago I recycled some mixed electronic stuff and the only thing nobody would take was a carbon monoxide detector, which was still in the trunk. No idea why it started chirping two days ago, so there you have it. The simplest explanation was the correct one.