On the Battery Entity and class section indicates that BatteryEntity should be part of the
power_source group doesn't exist, should be
power_sources. It has an s missing.
It took me a while to realize why the battery power wasn't propagating when other receivers were connected to it.
Note: I didn't update the previous message because I can't: Update topic crashes [mavenseed bug]
Thanks, logging it to fix it with the next update.