Der Akku in deinem Hörgerät

The battery in your hearing aid

The energy supply for your hearing aid is an important issue. So-called zinc-air batteries were used with outdated technologies from earlier times. However, these batteries were not permanently installed in the device. That made a regular exchange necessary. In the meantime, however, the technologies have become more innovative when it comes to the energy supply of your hearing aid. Nowadays hearing aids are rechargeable. In this guide you will find out everything about batteries and hearing aids.

The function of your hearing aid battery

A conventional device that works with a battery uses zinc-air technology. In the meantime, however, there are other solutions for hearing aids, because most of them have a modern battery. The products are therefore rechargeable.

There are three proven technologies that are used today:

  • Silver oxide zinc batteries


This version is a very expensive variant, but the energy density is also above average. With this technology, self-discharge is relatively low and the charging capacity is above average. Such devices therefore only need to be recharged after a day. The lifespan is approximately one year.


  • Nickel-metal hydride batteries


This variant is the cheapest of the three. However, such batteries have a relatively low energy density, so that the charging capacity is also relatively low. They need to be recharged after less than 24 hours. The advantage lies in the problem-free exchange.


  • Lithium-ion batteries


Lithium-ion batteries are the most commonly used. The price-performance ratio is very advantageous. Although the cost is relatively low, the loading capacity for it is relatively high. The only disadvantage of this variant is that these batteries cannot be replaced in the event of a defect, although they are rechargeable. However, the service life is a full four years.


What all these battery systems have in common is that they are rechargeable. Among other things, they differ in how the charging process works. Whether or not a hearing aid can be used while it is charging depends on the technology used. There are hybrid functions in nickel-metal hydride devices that enable the user to use battery operation on the one hand and battery operation on the other. So if the hearing aid is not yet fully charged, it is possible to use a battery while charging.


In contrast, the rechargeable battery of a lithium-ion device cannot be replaced. Such devices must be charged directly on the charging station. During this time, they cannot be used. Do you have a hearing aid that is equipped with silver oxide-zinc technology? In this case you can change the energy storage device and use a spare battery. This avoids possible downtime.

Charging a battery

It is not possible to charge the battery of a hearing aid using a charging cable. That's why the right charging station is available as an accessory. This charging station is relatively small and has the dimensions of a matchbox. This also ensures problem-free transport. However, if you don't have access to a power socket on the go, you can also connect to your laptop using a USB cable. So you can still charge your hearing aid - no matter where you are.

Advantages compared to battery devices

The biggest advantage you have with a cordless hearing aid is that you can charge this hearing aid over and over again. This means that you don't have to worry about batteries and their supplies. This saves you permanently cash. In addition, a battery is particularly environmentally friendly. In total, a battery is extrapolated to the entire lifespan, replacing up to 100 batteries on average. Batteries require a lot of energy during production. In comparison, this is about five times higher than a battery.

How much do hearing aids with battery operation cost?

Hearing aids with battery operation and modern equipment vary greatly in price. The difference can be between 500 and 2,000 euros. Some of this is covered by the health insurance fund. The additional payment is up to 786.86 Euros for a hearing aid of your needs. You have to pay the difference yourself.


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