How to choose the correct hearing aid batteries

1: When to change your hearing aid batteries

You should replace your battery on your hearing aids if you have no sound or if sounds are unclear. Typically, your hearing aid batteries should last you a full week depending on a few factors, such as the battery type and how often the hearing aid is used. It is always a good idea to carry a spare pack of batteries with you in case your power begins to run low.

2: How to choose the correct batteries

Each hearing aid battery package is colour-coded for different types of hearing aids and their sizes.

Size 10 batteries - yellow

Size 312 batteries - brown

Size 13 batteries – orange

3: What size do I need?

When you are fitted with your new hearing aids your Audiologist will show you what batteries are needed for your hearing aid and will show you how to replace the battery.

We will always keep a record of what type of battery you have, so if you are running low, you can call our team, and we will send you batteries by post.

In-ear or invisible hearing aids normally take a P10 battery, while behind-the-hear models normally use a 312. The table below shows our own models & battery types.


Battery Type

Widex Unique 440


Widex Evoke 440


Moment 330 Passion


Widex 330 CIC


Unitron Blu 5



4: How to change your hearing aid batteries

To Change your hearing aid battery start off by removing the old battery from the battery compartment.

  1. Open the door to the battery compartment.
  2. Turn the hearing aid upside down, allowing the old battery to fall out. If the battery does not fall out, gently remove it by poking the battery with a cleaning stick.
  3. Pick up a new battery with the stick provided, the stick is magnetised so it will make picking it up easy.
  4. Place the new battery in the battery holder. If the battery compartment does not close, you have inserted the battery incorrectly.
  5. Once the battery is in the compartment, simply remove the sticker & close the door.

Your hearing aid should now power on as usual.