While playing in church this weekend my guitarist had to change his transmitter battery. After mass he and the violinist said they were lucky to get 2 two hours battery life. I feel this is unnacceptable. I had heard good things about the sound of this unit but no one mentioned this problem before I recommended the sennheiser unit to them. Are any of you Sennheiser owners getting better results than this? I'm recommending they send them back to be fixed. My Shure wireless transmittor batteries are getting at least 12 hours +. Thanks for any feedback on this.