This is a very unscientific analysis of the Roam battery drain after 3 hours of use.
Roam placement: Outdoors in partly shaded area
Roam Mode: WiFi
Music source: SiriusXM Watercolors Jazz and R&B
Outdoor Temperature: 74 degrees
Battery initial charge 100%
Battery After 3 hours of use: 74%
Average Battery Drain: 100 minus 74 = 26 divided by 3 = 8.67.
100 divided by 8.67= 11.53 hours estimated use.
As I said in the beginning this analysis has no basis in science, but can be used to suggest that the Roans battery use is approximately 10 - 11 hours under the conditions set forth. Of course your use may be equal or less. I doubt it would be better?