Just one more question for anyone. I spent about 15 minutes Googling through Ant+ information. It sounds to me like an Ant+ sensor in a typical bike scenario (speed, cadence, etc) is unidirectional (sensor cannot receive) and therefore it is always sending information. Power drain becomes manageable because Ant+ power levels are quite low and information is sent in very short bursts (zero output power most of the time regardless).

Is there something else going on here?

Thanks.

dave