These guys do the odd bit of Crow stuff. not much on the website as they are primarily CCTV
http://baekenterprise.com/accessories/crow-merlin-pro-wireless-receiver-interface-167.html
Even when the system is unset they do still light up occasionally when an area has been vacated for a while, they only light up once though and very rarely. Doubt it would have that much of an effect on battery life.
Classic story of installer not knowing what he was doing, probably used to veritas series which didn't have enough zones for the job and decided to stick in a premier, saw this happen before.