Making motion sensor expose battery status

I have a Everspring z-wave motion sensor which doesn’t expose the “battery capability”, but I saw this event it sent out:
6 Feb 2014 11:01:10 - 1 week ago DEVICE battery 1 motion2 has a low battery true true

Is it possible somehow to customize its device type (right now it’s handled as “z-wave motion sensor”) to make it expose the battery capability, and translate that event into a battery event of 0% battery or so? That would allow my “battery status catch all” app to monitor it as the other devices, and alert me when batteries need to be replaces.