Privacy and cookie policy

Oticon will place cookies on your computer to help us make this website better. To find out more about these cookies, see our Cookie Policy. Use of this site confirms your acceptance of these cookies.

How to replace the battery in a hearing aid

You will hear two beeps when it is time to change the battery. This pre-warning will be repeated at moderate intervals until the battery runs out. The battery may run out shortly after a pre-warning or within the next couple of hours depending on battery capabilities and individual hearing losses.

If the battery runs out, the instrument turns off. When that happens, four beeps are sounded to indicate that the instrument is no longer operating. Replace the battery.

A worn out battery should be removed immediately and disposed of according to local regulations. For instructions on how to change the battery, please select your hearing aid style:

Activating a hearing aid for the first time

A hearing aid is a miniature electronic device that runs on special batteries. To activate the instrument, you must insert a fresh battery in the battery compartment.

The hearing aid will start up when the battery door is closed. It will take a few seconds until sound is produced. A jingle is played while the start up process is running. Put the instruments on once the battery door is closed.

If the hearing aid is held in the hand while activated, it may produce a whistling sound. This will stop when properly fitted on the ear.

Turning a hearing aid on and off

Turn your hearing instrument on by closing the battery door completely with the battery in place. When the battery door is closed the instrument will start up by playing a jingle. This indicates that the battery is working and the instrument is operating.

Turn your hearing instrument off by opening the battery door completely.

To preserve the battery, make sure your hearing instrument is switched off when you are not wearing it.

In-the-ear styles Behind-the-ear styles



Important notice

Open the battery compartment fully to allow air to circulate whenever you are not using your hearing instrument, especially at night.

Testing a hearing aid battery

If your hearing aids turn off, you may wish to check if the battery has run out. There are two common ways to check this:

Using a battery tester

  • Place the battery on the battery tester surface. Ensure that the positive (+) marking is facing upwards.
  • Slide the battery in the direction of the arrow and read the result on the display.

Without a battery tester

  • Insert the battery in the hearing aid and close the battery door.
  • Close your hand around the hearing aid and hold it up to your ear.
  • If the instrument is squealing, the battery is functioning.
Identifying battery size

There are four types of zinc air batteries used in hearing aids, and each has its own colour code on the battery package. Which battery size you should use is stated in the hearing aid’s instructions for use.

Typically, a battery will keep a hearing aid powered for three to ten days before it needs replacing, depending on usage and the hearing aid style.

Important notice

Use a specialist for repairs and servicing. Never attempt to repair your hearing aids yourself. You may cause more damage, which may be irreparable. Check the instructions for use that came with your hearing aids for more details.

Always contact your hearing care professional if you are having problems with your hearing aids.