No, youre right, that wouldnt work for battery powered. I chop the ends off old cell phone chargers and try to keep a room's sensors down to a single box. The only one I've considered being battery powered is the "Mailbox opened" one but thats another project. The polling is really just to allow getting realtime data when you want it. If I think about it more, Ill probably leave it out. I was just thinking out loud near the end.