I have not yet succeeded in diagnosing the power consumption issues, but recently, the behavior of BBS has changed
I used to (from initial BBS installation to about a week ago) see a significant time in deep sleep when the phone was idle. Now I see Deep Sleep is Zero%, and Awake Screen Off is the total time since unplugged from charging.
Formerly, I would see processes listed under Kernel Wakelock. Now Kernel Wakelock reports "No stats have been collected yet"
How can I determine what has changed and fix it?
Looking in the Android Battery Usage summary, it says the majority of the battery usage is from "Android System", which is not helpful.