I’ve had my Oticon 8000s (immediate predecessor to the Oticon Dual) for almost 2 years now. They’re fully automatic–I can’t control the amplification, although the internal circuitry seems to do a pretty good job of adjusting to meet my needs as the ambient noise level changes. Most of the day I’m in a pretty quiet office. My batteries (#10 itsy bitsy thingies) last roughly 5 days–varies according to what I’m doing. I don’t change them both at the same time, because there can be as much as a day difference in when they expire. The only time it’s annoying is when one will run out when I’m on my scooter or driving the car–have to pull over to change the battery myself, or in the car my SO can change it. I carry 4 batteries, 2 in each of the compartments, in the plastic Rayovac case my audiologist gave me, and that’s inside the soft case from Oticon. Whenever I use one from the case, I try (mostly successfully) to replace it that night when I get home.
Cary