I bought a new 75" TV a few months ago, but it didn't have the analog audio outputs needed to connect my older (2012 model) hearing aids. So I bought new hearing aids that connect to a TV adapter that is plugged into the optical output on the TV. These new Oticon hearing aids have silver-zinc rechargeable batteries, but will also use disposable batteries. When I first got them, the batteries were lasting as long as 15 hours, but now they seem to run down and need recharging after 11 or 12 hours. I can always switch to the disposable batteries, but it's kind of a pain because then I have to put the rechargeable batteries back in to recharge the hearing aids overnight. The rechargeable batteries are supposed to last about a year, but I've only been using them for about 3 months. Anyone have similar issues with rechargeable hearing aids?