If you decide to go with the Z-Wave module 2 for Yale, check out this Enhanced Z-Wave Lock device handler which will allow you to enable the Eco mode supported by the Yale Z-Wave Module 2 through SmartThings improving your battery life (and also provide you with access to other advanced module settings): [RELEASE] Universal Enhanced Z-Wave Lock Device Handler for Schlage, Yale, Kwikset, IDLock, Popp, Danalock, August Pro, Keywe, Philia, Samsung