Hi Arrgh,
Thanks for your helpful posts in a couple of other threads today!
I'll leave someone with more detailed knowledge of the plugins to answer what the battery status receiver does.
But I can say that the initial approach that we took to left right systems was to recommend that sensor manufacturers reported the lowest battery level as you suggest. It is likely that you will still find sensors in the market that only do this. At that time no mechanism was defined for sending the status of multiple batteries.
The current situation is that sensors can include a 'battery index' when reporting battery status, and report the number of batteries in the system. By default the lowest charged battery information will still be transmitted. However, it is now possible to request information on the remaining indexed batteries.
In bike power a convention has been defined mapping the lowest battery indices to left / right pedals. I can't remember which way round this was, but take a look at the description for common page 82 in the ANT+ bike power device profile for more info.
Kind regards,
Kat
