I was test driving a seinnheiser cordless the other week and the same thing happened. I put it down to a failing battery. I was borrowing one that belongs to the hotel and have no idea when the battery was changed. It is a disconcerting thing to have happen, especially when with the seinnheisers the sound is so darned crystal clear, you hear everything.
Back to the Gemini I tried the mic in a store cos I was interested in purchasing too...what I liked about it was the lack of sibilance in my voice both speaking and singing. Sibilance is a bit of a prob for me.
Let us know how you get on with your testing I am very interested.

Morgan, is it the freeport wireless you are talking about? if so the batteries are suppose to last 10 hours.  I just got one for myself. Can't beat the price at www.musiciansfriend.com on the mike.

To be honest Danny I dunno . We dont have musicians friend here and pay at least double but most times more than double for anything you do...we may have low crime rate but we have expensive audio equipment

thanks Murray at least you understand the difficulties imposed upon us over here. Cordless mics are prohibitively expensive. The army band recently upgraded to cordless shures and to be honest they dont like them that much, you have to be hard on those mics or the sound drops off substantially. I think if/when I purchase it will be a Sennheiser Freeport cordless. I think that is what we have at the hotel. I intend to borrow one a few more times before making a decsision but if it is the same as the one I have looked at online, the sound is crystal clear and the gain so much greater than my old sm58 that I have to turn my vocals wayyyy down. I just wanna be sure that the popping noises that started last time I used it were indeed due to the battery wearing down. I can purchase one of those for $525. still darned expensive

thanks Murray at least you understand the difficulties imposed upon us over here. Cordless mics are prohibitively expensive. The army band recently upgraded to cordless shures and to be honest they dont like them that much, you have to be hard on those mics or the sound drops off substantially. I think if/when I purchase it will be a Sennheiser Freeport cordless. I think that is what we have at the hotel. I intend to borrow one a few more times before making a decsision but if it is the same as the one I have looked at online, the sound is crystal clear and the gain so much greater than my old sm58 that I have to turn my vocals wayyyy down. I just wanna be sure that the popping noises that started last time I used it were indeed due to the battery wearing down. I can purchase one of those for $525. still darned expensive

thank you Danny I look forward to hearing from you xxx
Maybe if I get to the states either to or from UK next year I can pick one up then, but the power supply is completely different here also...so I dunno

djdawg: "Without warning, I noticed that at random moments while people were singing, the sound from the mic all of a sudden had a popping or overmodulated almost "paper flapping" noise for lack of a better description."