Widex C-9 - Manual (Page 11)

11
The battery
We recommend zinc-air batteries . Use a size 13 battery for the
hearing aid .
To obtain replacement batteries, please consult your hearing care
professional . It is important to take note of the expiry date and
the recommendations on the battery pack regarding disposal of
used batteries .
Inserting the battery
Before inserting a new battery into the hearing
aid, remember to remove the adhesive tab . Once
the tab has been removed, the battery will start
functioning after a few seconds .