Hmmm....I have never heard a beep. I keep my Transear on about 3. I haven't been keeping track of battery life, but I seem to be going about 2 weeks of about 12 hours a day. those are from the batteries I got at the Audiologist, and it looks like they are Rayovac....I cut up the package to fit in the little case, so I'm not sure on that. I put mine in the dry and store when I get home at night, so it runs the whole cycle.
Funny side note, I'm still having trouble remembering to put it in in the mornings, as it's the last thing I do before I leave. This morning my other half was saying something to me from the laundry room, and I had to ask 3 times "what"? He was saying "where's the scoop?" and all I got out of it was "in the stingle". What the heck is a stingle? ha ha ha. This was just before we were leaving and after I finally heard him, he goes "Go put your TransEar in". He knew I didn't have it.