Originally Posted by
mike868y
definitely replace the o-ring! if you email them they'll send you a new one. i think w/o it the battery will drain faster and it will be much more susceptible to water getting in.
Thanks, I realized upon further inspection that it wasn't just the O ring missing but one of the plastic tabs had broken off. I emailed a photo to Stages and they sent me an RMA to send the unit in for repair and rework the the PM with second generation housing. Good customer service!