How long does the Ring outdoor siren batteries last?

How long does the Ring outdoor siren batteries last... 1) ...with just D cells in and no dusk to dawn 2) ...with D and rechargeable battery in (as in the rechargeable last), no dusk to dawn 3) ...with D and rechargeable battery in (as in the rechargeable last), dusk to dawn on If you have D cells in, and plug in adapter, I presume that you can have dusk to dawn on all the time, and the D cell are just backup, and last 3 years? thanks