An email I received from a previous VA Audiologist that checks on me even though I have not been in the clinic she works at for over 5 years. She and I did research that found some of my deeper hearing issues. She is at a conference and the subject of one of the lectures was hearing aid life without disposable batteries. She says that it is being forced on the companies to not even plan on there being zinc oxide button batteries available within the next few years. She said this could easily eliminate CIC, and IIC aids.