Ah yes, the spontanious death of the infamous Naidas. A problem I am well aquainted with. What brand batteries do you use? You can't use Rayovac, Duracell, or Energizer. Siemens or PowerOne work though. The Rayovac, Duracell, and Energizer batteris are all a super tiny fraction skinner than the Siemens and PowerOne batteries. As a result the lose contact with the battery contacts and aid dies.
Try the battery change. If you are using Siemens or PowerOne batteries and this is still happening it is probably a problem with the wiring or the battery contacts. This was a problem with the first few batches of Naidas (I have been through at least 10 different Naidas by now) and if that is the case Phonak will exchange the aid for you.
Hope that helps! Let me know!
Thanks, Jenny. I tried the battery change and no luck. My audie's sending the Naida in tomorrow and says she has a loaner for me. I'll let you know what they find.