I have seen another user (exariv) say this as well. My headset will start to beep and every couple of hours after listening to the beep every 10 minutes, adds another beep. It will start to beep and I will continue to suffer through the beeps. I have gotten a full 14 hours after the beeping has started a few times, but most of the time I get 10+ hours of listening time after the beeping begins.