Sena 20s follow-up

I’ve had the 20s for just over a year and like it even less. The volume change issue remains but now has come poor battery life when powered off. I can charge it one day, use it for around an hour, and the next day it is giving low battery notifications within 10 minutes of use. In regular use it will last far longer than that so it seems something causes the battery to drain when it is powered off.