@jasonhouk
I see in this picture post of yours that it has a 7000mAh battery....
This scanner has A usbc port does it include audio out?
forums.radioreference.com
The large SDS100 battery = 5400mAh
Checked my notes from about a year ago:
Holding on a heavy traffic system (constant actvity)
Display at 40%
Vol = 5
Keyboard Light = off
7h, 5min till battery alarm alert (3200mV)
Estimated battery life at above conditions for a 7000mAh = 9.2h
Assuming same power consumption for the SDS150
Perhaps longer since that battery was several years old by that point.