This image and video shows how to change the battery with custom (ITE/ITC/CIC) hearing aids
Four Hearing Aid Battery Types:
A new hearing aid battery will keep your device powered for between three and ten days before a replacement will be needed. The lifetime of the battery depends on the style of the hearing aids and how you use it. A few short beeps may be heard when a battery needs to be replaced.
Batteries are available to purchase on our official website: Hearing Aid Supplies Archives - HearingLife Shop