Hearing aid batteries

In the past, mercury zinc batteries were the most commonly used. Recently, however, zinc-air batteries have gained popularity, as they are more eco-friendly and maintain a constant voltage. They have a simple operating principle: Small holes are integrated into the battery surface, which allow the air to penetrate. The air reacts with the zinc inside the battery, producing zinc oxide. The reaction generates energy.

It is important to note that the process only begins once the battery has been inserted into the hearing aid. This is why the holes in hearing aid batteries are sealed with special protective foil.
 

Before you insert the battery into the hearing aid, please remove the foil. Since the battery only begins to work at this point, it may take a few moments before your hearing aid is supplied with power.

It is worth remembering that once the protective foil has been removed, it is impossible to stop the battery discharging. You should therefore remove the foil from your hearing aid battery only when you are ready to insert into your hearing aid. Alternatively, it can also be a good idea to remove the protective foil and wait for two minutes before inserting the battery into your hearing aid.

Hearing aid batteries are produced by various manufacturers and come in a variety of sizes. Behind-the-ear (BTE) hearing aids typically take size 13 and 312 batteries, while in-the-ear (ITE) hearing aids tend to take sizes 312 and 10.

The more powerful size 675 battery is used in larger models, as it provides a higher energy supply for longer.

If you want to order more batteries but are unsure what size you need for your hearing aid, the old packaging can be helpful. Hearing aid batteries come in four sizes: 10, 13, 312, and 675. Don’t be confused by the additional codes, such as A, PR, S, ZD, ZA, V, DA, or ZL – these are less important. The size can be found on the front of the packaging, on the right, highlighted with the relevant color.

If you no longer have the hearing aid battery packaging, you can easily find out what size you need. Batteries come in different diameters and heights. The table provides the information you need.

When fitting the small hearing aid batteries, the first step is to remove the adhesive foil. It is then advisable to wait for two minutes to allow the battery to reach its full power. Please ensure that you insert the batteries with the minus and plus sides the right way round. If the battery compartment will not close, or is difficult to close, it is usually because the battery has been inserted incorrectly.

If your hearing aid does not work even after fitting a new battery, ensure that there is no contamination in the battery compartment, as this can interfere with the connection. Many manufacturers supply magnetic tools to make battery fitting easier.

Batteries should ideally be stored at room temperature, between 10 and 25°C. They should also be kept out of the reach of children, as button cells are small enough to be swallowed.

As soon as the hearing aid batteries run out, remove them from your hearing aid to prevent them from leaking or expanding.

Standard hearing aid batteries are not rechargeable. Please do not throw your used button cells in the garbage. Take them to yourclinician or to an appropriate collection point instead.