Man that would be a deal breaker for me. I just sold my Contour Roam but I was getting upwards of 2-3 hours of footage (that's a full day on the hill recording most runs) and never once had the battery die on me. Unfortunately with no battery meter I have no idea how close I ever was, but that's irrelevant.
Have you thought about checking out the Contour Roam 2?
I'm going to go helmet-cam-less for a bit but if I get the bug again that'll be the one I likely go to...