Are all of these non working remotes ones with microphones? Maybe roku is gather data through that microphone which stays on and drains the battery. If you PM roku people, maybe they will be nice and shut it off for you if you give them your info. Mine has all of the sudden stopped draining battery after posting frustration.
Roku also needs to come to an agreement with charter before I switch to something else. I reccomend roku to everyone for the charter app. But I cant anymore. Big loss for them.