If you hold down the button on the back of the Roam for 5 seconds until you hear a chime, it will power off the Roam completely to keep the battery charged. Just putting the Roam into sleep mode will allow the battery to continue to drain.
GuitarSuperstar - appreciate the info. Work. I didn’t hold it down long enough. Thanks.
this is why sonos needs to add a complete power off/on feature with deep sleep mode when turning off with app but as usual sonos is more stubborn then bose !